Leg : 51 Top/Bottom Interval(mm): 0/ 370 Analyst: Kelts, K.
Hole: 417D Sample Midpoint (m) : 339.37
Core: 21 Top of Core Depth (m) : 334.50
Sect: 4 Top of Section Depth(m): 339.00
LITHOLOGY: SEDIMENT;
Leg : 51 Top/Bottom Interval(mm): 370/ 620 Analyst: Salisbury, M.
Hole: 417D Sample Midpoint (m) : 339.62
Core: 21 Top of Core Depth (m) : 334.50
Sect: 4 Top of Section Depth(m): 339.37
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCE 1 (37-40), 2 (42-44), 3 (47-49), 4 (52-61);
Texture : PHYRIC;
Structure : VEINS FILED BY CALCITE WITH INCLUSIONS OF SMEC;
Alteration : MOD
ALTERATION HALO ALONG VEINS AND MARGINS;
Comments : COLOR OF BASALT IS GRAY;
Vesicles : Size(mm): <4 Percent:
Phenocrysts:
Replacement: FILLS VEINS;
SMECTITE
INCLUSIONS IN CALCITE VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 345.48
Core: 22 Top of Core Depth (m) : 344.00
Sect: 1 Top of Section Depth(m): 344.00
LITHOLOGY: BASALTIC BRECCIA;
Piece No. : PCE 1A (3-18), 1B (18-26), 2 (32-38), 3A (42-48),
3B (48-53), 4 (57-72), 5 (76-80), 6 (83-92),
7 (95-101), 8 (104-110), 9 (115-118), 10 (121-131),
11 (135-148);
Texture : BASALT BRECCIA CONSISTING OF PLAG-CPX PHYRIC BASALT,
LIGHT GREY-BROWN CHILLED MARGINS IN PCES 1-3A,
GROUNDMASS HAS MICROLITIC TEXTURE;
Structure : VEINS FILLED BY CALCITE AND YELLOW-GREEN TO DARK-
GREEN SMEC, BRECCIA IN PCES 1-3A COMPOSED OF
FRAGMENTS OF BASALT AND ALTERED GLASS IN A BANDED
MATRIX OF GREEN YELLOW-GREEN AND BLUE-GREEN SMEC
WITH MINOR PYRITE AND VEINS OF CALCITE, SMALLER
FRAGMENTS OFTEN CONCENTRICALLY ZONED COMPLETELY
REPLACED BY SMEC+CALCITE, INTERPILLOW BRECCIA
IN PCE 4 COMPOSED OF CALCITE SPHERES AND ANGULAR
SHARDS OF DEVITRIFIED GLASS IN A FINE-GRAINED 1MM
SPAR CALCITE;
Alteration : MOD
Comments : BASALT IS DARK GREY COLOR;
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): <2-<5
SIZE INCREASES FROM <2MM IN PCE 1 TO <5MM IN PCES
10+11,PARTLY REPLACED BY CLAY OR CALCITE IN PCES
1-3, EXTREMELY FRESH IN PCES 4-11;
CLINOPYROXENE ( <10%)
Size(mm): <1
PARTLY REPLACED BY GREEN SMEC+CALCITE;
Groundmass : MICROLITIC;
Replacement: CALCITE
PARTLY REPLACES PLAG + CPX PHENOS, FILLS VEINS,
PCES 10+11 CONTAIN DISSEMINATED CALCITE, REPLACES
SMALLER FRAGMENTS IN PCES 1-3A, FOUND AS SPHERES
AND IN FINE-GRAINED MOSAIC MATRIX AND RIMMING
COURSE GRAINED BASALT FRAGMENTS AND GLASS SHARDS
IN THE FORM OF 1MM SPARS IN PCE 4;
CLAY MINERALS
PARTLY REPLACES PLAG PHENOS;
SMECTITE
GREEN PARTLY REPLACES CPX PHENOS, YELLOW-GREEN TO
DARK GREEN FILLS VEINS, GREEN + YELLOW-GREEN +
BLUE GREEN FORM A BANDED MATRIX IN PCES 1-3A,
GREEN IS PART OF A FINE-GRAINED MOSAIC MATRIX IN
PCE 4;
PYRITE
MINOR AMOUNTS IN BANDED MATRIX PCES 1-3A;
CELADONITE
FOUND IN FINE-GRAINED MOSAIC MATRIX IN PCE 4;
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 346.98
Core: 22 Top of Core Depth (m) : 344.00
Sect: 2 Top of Section Depth(m): 345.50
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (2-15), 2 (17-20), 3 (22-42), 4A (47-56),
4B (56-71), 4C (72-76), 5 (80-83), 6 (86-92),
7 (95-101), 8 (104-111), 9 (115-119), 10 (122-131),
11 (134-148);
Texture : PHYRIC PILLOW BASALT WITH CHILL MARGINS IN PCES 3+6+
7+9+10 WITH TRACES OF FRESH GLASS IN PCE 6,
GROUNDMASS IS APHANITIC TO INTERSERTAL TEXTURE;
Structure : VEINS FILLED BY CALCITE + GREEN SMECTITE + SULFIDES,
PCE 3 CONTAINS RADIAL COOLING CRACKS;
Alteration : MOD
Comments : BASALT IS DARK GRAY COLOR;
Vesicles : Size(mm): <0.5 Percent:
Location: Filling: CALCITE,SMEC
SMEC IS GREEN;
Groundmass : APHANITIC TO INTERSERTAL;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <5
EUHEDRAL, PARTIALLY REPLACED BY CALCITE;
MAFIC ( <2%)
Size(mm): <1
REPLACED BY GREEN OR PALE BROWN SECONDARY
MINERALS;
Replacement: CALCITE
PARTIALLY REPLACES PLAG PHENOS, FILLS VESICLES
AND VEINS;
SULFIDES
FILLS VEINS;
SMECTITE
GREEN FILLS VESICLES AND VEINS,
MAFIC PHENOS REPLACED BY GREEN OR PALE BROWN
SECONDARY MINERALS;
Leg : 51 Top/Bottom Interval(mm): 0/1360 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 348.36
Core: 22 Top of Core Depth (m) : 344.00
Sect: 3 Top of Section Depth(m): 347.00
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (2-10), 2 (15-19), 3 (24-32), 4 (37-55),
5A (61-74), 5B (74-76), 6 (82-85), 7 (91-94),
8A (98-106), 8B (106-116), 8C (116-136);
Texture : PHYRIC PILLOW BASALT WITH CHILLED MARGINS AND FRESH
TO PARTIALLY DEVITRIFIED GLASS IN PCES 3+7+8, GLASSY
MARGIN IN PCE 3 IS 20MM THICK AND IS COATED WITH A
DARK GRAY FILM AGAINST CALCITE CEMENTED INTERPILLOW
FILLING, GROUNDMASS TEXTURE IS APHANITIC TO
INTERSERTAL;
Structure : VEINS FILLED BY CALCITE + DARK GREEN SMEC +
SULFIDES;
Alteration : MOD
Comments : BASALT IS DARK GRAY COLOR;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <5
EUHEDRAL;
MAFIC ( <2%)
REPLACED BY GREEN TO PALE BROWN SECONDARY MINERALS
EUHEDRAL PHENOS IN PCE 4 POSSIBLY OLIVINE REPLACED
BY CALCITE AND PALE BROWN IDDINGSITE;
Groundmass : APHANITIC TO INTERSERAL;
Replacement: CALCITE
REPLACES PHENOS IN PCE 4, FILLS VEINS, CEMENTS
INTERPILLOW FILLING;
IDDINGSITE
REPLACES PHENOS IN PCE 4;
SULFIDES
FILLS VEINS;
SMECTITE
DARK GREEN FILLS VEINS;
MAFIC PHENOS REPLACED BY GREEN TO PALE BROWN
SECONDARY MINERALS;
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 349.98
Core: 22 Top of Core Depth (m) : 344.00
Sect: 4 Top of Section Depth(m): 348.50
LITHOLOGY: PLAG PHYRIC BASALT;
PCE 2 IS A FRAGMENT OF INTERPILLOW LIMESTONE;
Piece No. : PCE 1A (4-29), 1B (29-32), 1C (32-34), 1D (44-58),
2 (61-65), 3 (67-69), 4A (71-75), 4B (75-89),
5 (93-94), 6 (98-109), 7 (112-116), 8 (119-126).
9 (130-138), 10 (145-147);
Texture : PHYRIC PILLOW BASALT WITH CHILLED MARGINS IN PCES
1D + 4A + 7-9, TRACES OF FRESH GLASS IN PCES 2+3+5,
GROUNDMASS IS APHANITIC TO INTERSERTAL;
Structure : VEINS FILLED BY CALCITE + SULFIDES + GREEN SMECTITE;
Alteration : MOD
Comments : BASALT IS DARK GRAY COLOR;
Vesicles : Size(mm): <1 Percent:
Location: Filling: CALCITE
Groundmass : APHANITIC TO INTERSERTAL;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <8
EUHEDRAL, FRESH TO PARTIALLY REPLACED BY CALCITE;
MAFIC ( <2%)
Replacement: SMECTITE
GREEN, FILLS VEINS;
SULFIDES
FILLS VEINS;
CALCITE
FILLS VESICLES AND VEINS, PARTIALLY REPLACES PLAG
PHENOS;
FILLS VESICLES AND VEINS, PARTIALLY REPLACES PLAG
PHENOS;
Leg : 51 Top/Bottom Interval(mm): 0/1400 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 351.40
Core: 22 Top of Core Depth (m) : 344.00
Sect: 5 Top of Section Depth(m): 350.00
LITHOLOGY: PLAG PHYRIC BASALT;
PCES 2+6+11 ARE FRAGMENTS OF INTERPILLOW LIMESTONE;
Piece No. : PCE 1 (2-10), 2 (13-14), 3A (17-32), 3B (31-50),
3C (49-61), 3D (61-72), 4 (76-88), 5 (91-93),
6 (96-98), 7 (101 - 105), 8 (107-118), 9 (121-124),
10 (126-132), 11 (135-140);
Texture : PHYRIC PILLOW BASALT WITH GLASSY CHILLED MARGINS IN
PCES 1+3A+3D, INTERVAL 0-10CM AND 17-71CM REPRESENT
INDIVIDUAL PILLOW OR PARTS OF PILLOWS WITH CHILLED
MARGINS AND PORPHYRITIC CRYSTALLINE INTERIORS,
BASALT HAS AN APHANITIC TO INTERSERTAL GROUNDMASS;
Structure : VEINS FILLED WITH CALCITE + GREEN SMECTITE;
Alteration : MOD
Comments : BASALT IS DARK GRAY COLOR;
Vesicles :
Location: Filling: CALCITE, SMEC
RARE, SMEC IS GREEN;
Groundmass : APHANITIC TO INTERSERTAL;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <7
EUHEDRAL;
MAFIC
RARE, LONG BLACK TABULAR PHENOS;
Replacement: CALCITE
FILLS VEINS AND VESICLES;
SMECTITE
GREEN, FILLS VEINS AND VESICLES;
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 352.97
Core: 22 Top of Core Depth (m) : 344.00
Sect: 6 Top of Section Depth(m): 351.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 1A (2-9), 1B (8-24), 2 (28-45), 3 (48-59),
4 (64-76), 5 (80-86), 6 (90-96), 7 (101-115),
8 (119-147);
Texture : PHYRIC BASALT WITH AN INTERSERTAL GROUNDMASS;
Structure : VEINS FILLED BY CALCITE AND GREEN SMECTITE;
Alteration : MOD
Comments : BASALT IS DARK GRAY COLOR;
Vesicles : Size(mm): <0.3 Percent:
Location: Filling: CALC OR SMEC
COMMON IN PCES 7+8, SMECTITE IS GREEN;
Groundmass : INTERSERTAL;
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): <7
EUHEDRAL, RARELY TO 12MM;
MAFIC ( <2%)
Size(mm): <1
REPLACED BY GREEN SMEC OR CALCITE AND PALE BROWN
SECONDARY MINERAL;
OLIVINE
Size(mm): <1
PCE 8, EUHEDRAL, COMPLETELY REPLACED BY IDDINGSITE
AND GREEN SMEC;
Replacement: CALCITE
Minerals Replaced: MAFIC PHENOS
FILLS VESICLES + VEINS;
SMECTITE
Minerals Replaced: MAFIC, OL PHENOS
GREEN, FILLS VESICLES AND VEINS;
IDDINGSITE
Minerals Replaced: OL
MAFIC PHENOS ALSO REPLACED BY A PALE BROWN
SECONDARY MINERAL;
Leg : 51 Top/Bottom Interval(mm): 0/ 340 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 353.34
Core: 22 Top of Core Depth (m) : 344.00
Sect: 7 Top of Section Depth(m): 353.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PCE 2 IS INTERPILLOW LIMESTONE WITH MINOR BRECCIA;
Piece No. : PCE 1 (1-9), 2 (13-24), 3 (28-34);
Texture : PHYRIC PILLOW BASALT WITH FRESH GLASSY CHILL MARGINS
IN PCE 3;
Structure : VEINS FILLED BY CALCITE;
Alteration : MOD
Vesicles : SHRINKAGE VESICLES IN PCE 3;
Phenocrysts: PLAGIOCLASE
VARIABLY ALTERED TO CLAY;
CLINOPYROXENE
Size(mm): <2
OLIVINE
Size(mm): 1
ALTERED;
Replacement: CLAY
Minerals Replaced: PLAG
SULFIDES
MINOR IN PCE 3;
SMECTITE
Minerals Replaced: LIMESTONE
GREEN, PCE 3, LIMESTONE ALSO CONTAINS FRAGMENTS O
ALTERED GLASS;
Leg : 51 Top/Bottom Interval(mm): 0/ 520 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 354.02
Core: 23 Top of Core Depth (m) : 353.50
Sect: 1 Top of Section Depth(m): 353.50
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCE 1 (2-7), 2 (12-19), 3 (22-27), 4 (30-35),
5 (39-42), 6 (46-52);
Texture : PHYRIC BASALT, INTERSERTAL GROUNDMASS;
Structure : VEINS FILLED BY CALCITE;
Alteration : MOD
Comments : BASALT IS GRAY COLOR;
Vesicles : Size(mm): <1 Percent: RARE
Location: Filling: CALCITE
Groundmass : INTERSERTAL;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <5
REPLACED BY CALCITE AND DARK GREEN SMEC;
Replacement: CALCITE
FILLS VESICLES AND VEINS, REPLACES PLAG PHENOS;
SMECTITE
DARK GREEN, REPLACES PLAG PHENOS;
Leg : 51 Top/Bottom Interval(mm): 0/ 190 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 357.29
Core: 24 Top of Core Depth (m) : 357.10
Sect: 1 Top of Section Depth(m): 357.10
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCE 1 (4-11), 2 (15-19);
Texture : PHYRIC BASALT, INTERSERTAL GROUNDMASS;
Structure : VEINS FILLED BY CALCITE;
Alteration : MOD
Comments : BASALT IS GRAY COLOR;
Vesicles : Size(mm): <0.5 Percent:
Location: Filling: CALCITE,SMEC
VESICLES COMMON, SMEC IS GREEN, ALSO FILLED
WITH PYRITE;
Groundmass : INTERSERTAL;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <3
EUHEDRAL, PARTLY REPLACED BY CALCITE;
Replacement: CALCITE
FILLS VESICLES AND VEINS, REPLACES PLAG PHENOS;
SMECTITE
GREEN, FILLS VESICLES;
PYRITE
FILLS VESICLES;
Leg : 51 Top/Bottom Interval(mm): 0/ 600 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 357.90
Core: 25 Top of Core Depth (m) : 357.30
Sect: 1 Top of Section Depth(m): 357.30
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCE 1 (2-4), 2 (9-12), 3 (15-18), 4 (21-28),
5 (30-35), 6 (37-40), 7 (43-47), 8 (49-53)
9 (55-59);
Texture : PHYRIC;
Structure : VEINS, FILLED BY CALCITE AND GREEN SMEC;
Alteration : MOD
Comments : BASALT IS DARK GRAY COLOR;
Vesicles : Size(mm): <0.5 Percent: 1
Location: Filling: CALCITE
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <5
EUHEDRAL;
MAFIC ( <2%)
Size(mm): 3
REPLACED BY GREEN SMECTITE + CALCITE;
Replacement: CALCITE
FILLS VESICLES AND VEINS, REPLACES MAFIC PHENOS;
SMECTITE
GREEN, FILLS VEINS, REPLACES MAFIC PHENOS;
Leg : 51 Top/Bottom Interval(mm): 0/1310 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 358.81
Core: 26 Top of Core Depth (m) : 357.50
Sect: 1 Top of Section Depth(m): 357.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (2-14), 2 (17-21), 3 (24-27), 4 (30-44),
5 (46-59), 6 (61-66), 7 (69-80), 8 (82-98),
9 (101-109), 10 (111-120), 11 (123-131);
Texture : PHYRIC PILLOW BASALT WITH 1-2CM THICK CHILLED
GLASSY MARGINS IN PCES 5+6 AND TRACES OF BRECCIA IN
PCE 6, BASALT IN PCE 7 CONTAINS MULTIPLE CHILL
SURFACES 2 OF WHICH ARE INTERNAL, GROUNDMASS IS
APHANITIC TO CRYSTALLINE;
Structure : VEINS, FILLED BY CALCITE AND GREEN SMEC, CRACKS
AND JOINTS;
Alteration : MOD
ALTERED TO GRAY-BROWN WITHIN 5MM OF CRACKS AND
JOINTS;
Comments : BASALT IS DARK GRAY COLOR;
Vesicles : Size(mm): <0.5 Percent: <1
Location: Filling: CALCITE, SMEC
SMEC IS GREEN;
Groundmass : APHANITIC TO CRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <6
EUHEDRAL TO SUBHEDRAL, PARTIALLY REPLACED BY
CALCITE;
OLIVINE ( 5%)
Size(mm): <2
EUHEDRAL, COMPLETELY REPLACED BY GREEN SMEC;
Replacement: CALCITE
FILLS VEINS AND VESICLES, PARTIALLY REPLACED PLAG
PHENOS;
SMECTITE
GREEN, FILLS VEINS AND VESICLES, COMPLETELY
REPLACES OL PHENOS;
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 360.47
Core: 26 Top of Core Depth (m) : 357.50
Sect: 2 Top of Section Depth(m): 359.00
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (3-27), 1B (25-31), 1C (32-38), 2 (45-71),
3 (74-77), 4A (81-91), 4B (91-101), 5 (102-129),
6 (130-147);
Texture : PHYRIC PILLOW BASALT WITH GLASSY CHILLED MARGINS IN
PCES 2+4A+5+6 AND MINOR BRECCIA IN PCE 3, GRNDMASS
IS INTERSERTAL TO HYALOPILITIC,
BRECCIA IN PCE 3 COMPOSED OF SMALL SHARDS OF GLASS
IN A MATRIX OF SMEC + CELADONITE + CALCITE CUT
BY CALCITE-FILLED VEINS;
Structure : VEINS, FILLED BY CALCITE, WELL DEVELOPED RADIAL
CRACKS IN PCE 2;
Alteration : MOD
Comments : PCE 1 IS CONTINUOUS WITH PRECEDING SECTION;
BASALT IS DARK GRAY COLOR;
Vesicles : Size(mm): Percent: 3-5
Location: Filling: CALCITE,CELAD
Groundmass : INTERSERTAL TO HYALOPILITIC;
Phenocrysts: PLAGIOCLASE ( 10%)
MAFIC ( 2-4%)
Size(mm): <3
PCE 1, PARTIALLY ALTERED;
OLIVINE ( 5-7%)
PCES 2+4+5+6, ALTERED;
Replacement: CALCITE
FILLS VESICLES AND VEINS, FOUND IN BRECCIA;
CELADONITE
FILLS VESICLES, FOUND IN BRECCIA;
SMECTITE
FOUND IN BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/1460 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 361.96
Core: 26 Top of Core Depth (m) : 357.50
Sect: 3 Top of Section Depth(m): 360.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-24), 1B (24-36), 1C (37-46), 2 (50-59),
3 (62-66), 4 (70-73), 5A (75-82), 5B (81-101),
5C (100-111), 6 (115-125), 7 (128-146);
Texture : PHYRIC PILLOW BASALT WITH FRESH GLASSY CHILLED
MARGINS IN PCES 1C+5A+6+7 AND MINOR BRECCIA
IN PCES 2-4 CONSISTING OF GLASS FRAGMENTS IN A
MATRIX OF CALCITE AND GREEN SMEC, GROUNDMASS IS
CRYSTALLINE;
Structure : VEINS FILLED BY ZEOLITES + CALCITE + GREEN SMEC +
POSSIBLY PYRITE;
Alteration : MOD
Vesicles : Size(mm): Percent: 2
Location: Filling: CALC,ZEOLITE,SMEC
SMEC IS GREEN;
Groundmass : CRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <6
EUHEDRAL;
OLIVINE ( 2-5%)
Size(mm): <2
REPLACED BY GREEN SMECTITE + CALCITE;
Replacement: CALCITE
FILLS VESICLES AND VEINS, REPLACES OL PHENOS,
FOUND IN BRECCIA;
SMECTITE
GREEN, REPLACES OL PHENOS, FOUND IN BRECCIA, FILLS
VESICLES AND VEINS;
ZEOLITE
FILLS VESICLES AND VEINS;
PYRITE
POSSIBLY FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1370 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 363.37
Core: 26 Top of Core Depth (m) : 357.50
Sect: 4 Top of Section Depth(m): 362.00
LITHOLOGY: PLAG-OL PHYRIC BASALT;
MINOR INTERPILLOW LIMESTONE BRECCIA;
Piece No. : PCE 1A (2-18), 1B (18-25), 2A (26-35), 2B (25-57),
2C (57-68), 3A (70-90), 3B (90-109), 3C (110-118),
4 (121-127), 5 (131-137);
Texture : PHYRIC PILLOW BASALT WITH GLASSY CHILLED MARGINS IN
PCES 3A+4+5 AND MINOR INTERPILLOW LIMESTONE
BRECCIA, PCE 5 CONSISTS OF SHARDS OF CALCITE +
GREEN SMEC AND ALTERED GLASS IN A BANDED SELF
MATRIX OF CALCITE AND GREEN SMEC, GRNDMASS IS
APHANITIC TO HOLOCRYSTALLINE;
Structure : CALCITE FILLED VEINS ARE COMMON;
Groundmass : APHANITIC TO HOLOCRYASTALLINE;
Phenocrysts: PLAGIOCLASE ( 5-10%)
OLIVINE ( 5-10%)
REPLACED BY CALCITE + GREEN SMEC;
Replacement: CALCITE
REPLACES OL PHENOS, FILLS VEINS, FOUND IN BRECCIA;
SMECTITE
GREEN, REPLACES OL PHENOS, FOUND IN BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/1430 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 364.93
Core: 26 Top of Core Depth (m) : 357.50
Sect: 5 Top of Section Depth(m): 363.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
TRACES OF INTERPILLOW BRECCIA (PCE 5);
Piece No. : PCE 1A (4-21), 1B (20-42), 1C (42-51), 2 (49-63),
3A (65-75), 3B (75-87), 4 (91-102), 5 (108-110),
6A (113-125), 6B (125-133), 7 (137-143);
Texture : PHYRIC BASALT PILLOWS WITH TRACES OF INTERPILLOW
BRECCIA (PCE 5), PILLOWS BOUNDED BY APHANITIC TO
GLASSY CHILL MARGINS, BRECCIA IN PCE 5 COMPOSED OF
FRAGMENTS OF GLASS IN A MATRIX OF CALCITE AND GREEN
SMEC, GROUNDMASS APHANITIC TO CRYSTALLINE;
Structure : INTERVALS 0-53CM + 53-102CM + 114-143CM REPRESENT
INDIVIDUAL PILLOWS, VEINS FILLED BY CALCITE + GREEN
SMECTITE + ZEOLITES;
Alteration : MOD
BASALT IS DARK GRAY ALTERED TO PALE BROWN OR
GRAY-GREEN NEAR MARGINS;
Vesicles : Size(mm): Percent: 3
Location: Filling: CALCITE,SMEC
SMEC IS GREEN;
Groundmass : APHANITIC TO CRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <8
EUHEDRAL;
OLIVINE ( 2%)
Size(mm): <2
EUHEDRAL, REPLACED BY GREEN SMEC
Replacement: CALCITE
FILLS VEINS AND VESICLES AND IN BRECCIA;
SMECTITE
GREEN,REPLACES OL PHENOS, FILLS VESICLES AND
VEINS, FOUND IN BRECCIA;
ZEOLITE
FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1380 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 366.38
Core: 26 Top of Core Depth (m) : 357.50
Sect: 6 Top of Section Depth(m): 365.00
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-11), 1B (11-20), 2 (23-36), 3A (38-46),
3B (46-65), 4A (67-81), 4B (79-101), 4C (100-113),
4D (112-120), 4E (120-125), 4F (121-138);
Texture : PHYRIC PILLOW BASALT WITH FRESH TO PARTIALLY
DEVITRIFIED GLASSY CHILLED MARGINS PCES 1A+4F
GROUNDMASS IS APHANITIC TO CRYSTALLINE;
Structure : VEINS FILLED BY GREEN SMEC + CALCITE + ZEOLITES;
Alteration : MOD
Comments : BASALT IS DARK GRAY;
Vesicles : Size(mm): Percent: <2
Location: Filling: CALCITE,SMEC
SMEC IS GREEN;
Groundmass : APHANITIC TO CRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <7
EUHEDRAL;
OLIVINE ( 3-5%)
Size(mm): 1-3
EUHEDRAL TO SKELETAL, REPLACED BY GREEN SMEC AND
CALCITE;
Replacement: CALCITE
FILLS VESICLES AND VEINS, REPLACES OL PHENOS;
ZEOLITE
FILLS VEINS;
SMECTITE
GREEN, REPLACES OL PHENOS, FILLS VESICLES AND
VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/ 250 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 366.75
Core: 26 Top of Core Depth (m) : 357.50
Sect: 7 Top of Section Depth(m): 366.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (1-16), 1B (16-25);
Texture : PHYRIC PILLOW BASALT WITH GLASSY CHILLED MARGIN
(PCE 1A), GROUNDMASS IS APHANITIC TO HOLOCRYSTALLINE
TEXTURE;
Structure : VEINS FILLED BY CALCITE AND CELADONITE;
Alteration : MOD
Groundmass : APHANITIC TO HOLOCRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <7
OLIVINE ( <5%)
Size(mm): 1-2
ALTERED PHENOS;
Replacement: CALCITE
CELADONITE
BOTH FILLED VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1450 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 368.05
Core: 27 Top of Core Depth (m) : 366.60
Sect: 1 Top of Section Depth(m): 366.60
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-19), 1B(20-38), 2A (41-57), 2B (58-65),
2C (64-69), 3 (71-75), 4A (77-80), 4B (81-92),
5 (94-106), 6A (107-125), 6B (125-135),
7 (136-140), 8 (142-145);
Texture : PHYRIC PILLOW BASALT WITH THICK GLASSY CHILLED
MARGINS (PCES 46+8) AND MINOR INTERPILLOW SEDIMENTS
(PCES 4A+4B+8), GROUNDMASS IS APHANITIC TO
HOLOCRYSTALLINE;
Structure : VEINS ARE COMMON-FILLED WITH CALCITE AND GREEN
SMEC;
Alteration : MOD
Comments : BASALT IS DARK GRAY, SEDIMENTS IN PCE 4A COMPOSED OF
WHITE TO PINK LIMESTONE WITH SMALL SHARDS OF GLASS,
SEDIMENTS IN CONTACT WITH CHILLED MARGINS IN PCES 4B
+8 COMPOSED OF PALAGONITE FRAGMENTS IN A MATRIX OF
CALCITE;
Vesicles : Size(mm): <1 Percent:
Location: Filling: CALCITE
Shape : ROUND
SCARCE;
Groundmass : APHANITIC TO HOLOCRYSTALLINE;
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): <5
MAFIC ( 3-4%)
Size(mm): <5
Replacement: FILLS VESICLES AND VEINS, FOUND IN SEDIMENTS;
SMECTITE
GREEN, FILLS VEINS;
PALAGONITE
FOUND IN SEDIMENTS;
Leg : 51 Top/Bottom Interval(mm): 0/1390 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 369.49
Core: 27 Top of Core Depth (m) : 366.60
Sect: 2 Top of Section Depth(m): 368.10
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-11), 1B (11-20), 2 (24-42), 3 (45-55)
4 (57-71), 5 (74-82), 6 (84-93), 7 (96-103),
8 (107-110), 9 (114-116), 10 (120-123),
11 (127-131), 12 (135-139);
Texture : PHYRIC PILLOW BASALT WITH CHILLED MARGINS (PCES 1A+5
+6+10+11) AND TRACES OF INTERPILLOW BRECCIA
(PCES 1+8+9), INTERPILLOW BRECCIA COMPOSED OF GLASS
SHARDS IN A MATRIX OF GREEN SMEC AND CALCITE,
GROUNDMASS IS APHANITIC TO CRYSTALLINE;
Structure : VEINS FILLED BY GREEN SMEC + CALCITE + ZEOLITE;
Alteration : MOD
BASALT IS DARK GRAY LOCALLY ALTERED TO PALE BROWN;
Vesicles : Size(mm): <0.5 Percent:
Location: Filling: CALCITE,SMEC
SMEC IS GREEN;
Groundmass : APHANITIC TO CRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <6
EUHEDRAL;
OLIVINE ( 3%)
Size(mm): <2
EUHEDRAL TO SUBHEDRAL-REPLACED BY GREEN SMEC;
Replacement: CALCITE
FILLS VESICLES AND VEINS, FOUND IN BRECCIA;
ZEOLITE
FILLS VEINS;
SMECTITE
GREEN, REPLACES OL PHENOS, FILLS VEINS AND
VESICLES, FOUND IN BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/1370 Analyst:
Hole: 417D Sample Midpoint (m) : 370.97
Core: 27 Top of Core Depth (m) : 366.60
Sect: 3 Top of Section Depth(m): 369.60
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (3-16), 2 (19-25), 3 (27-37), 4A (39-48),
4B (48-93), 5 (95-104), 6 (106-113), 7 (115-137);
Texture : PHYRIC PILLOW BASALT WITH GLASSY CHILLED MARGINS IN
PCES 1+3+4A+6+7 AND TRACES OF INTERPILLOW LIMESTONE
IN PCE 3, PCE 3 CONTAINS AN EXFOLIATED GLASSY
CHILLED MARGIN IN A LIMESTONE MATRIX, GROUNDMASS IS
APHANITIC TO HOLOCRYSTALLINE;
Structure : INTERVALS 39-115CM AND 115-140CM REPRESENT
INDIVIDUAL PILLOWS OR PARTS OF PILLOWS BOUNDED BY
CHILL MARGINS, CALCITE FILLED VEINS;
Alteration : FRESH TO SLIGHTLY;
Comments : BASALT IS DARK GRAY COLOR;
Vesicles : SCARCE;
Groundmass : APHANITIC TO HOLOCRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <5
OLIVINE ( 5%)
Size(mm): <5
REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN;
CALCITE
FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1360 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 372.46
Core: 27 Top of Core Depth (m) : 366.60
Sect: 4 Top of Section Depth(m): 371.10
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH INTERPILLOW BRECCIA;
Piece No. : PCE 1A (2-25), 1B (25-44), 2 (49-54), 3 (57-63),
4 (66-71), 5 (74-76), 6A (78-82), 6B (82-99),
6C (100-129), 6D (129-136);
Texture : CHILLED MARGINS ON PILLOWS IN PCES 2+6A+6B+6D AND
INTERPILLOW BRECCIA IN PCES 2-4+6A+6B, GRNDMASS IS
APHANITIC TO CRYSTALLINE TEXTURE;
Structure : PHYRIC BASALT PILLOWS, INTERPILLOW BRECCIA COMPOSED
OF GLASS SHARDS IN A MATRIX OF ZEOLITES+CALCITE+
GREEN SMEC, VEINS FILLED BY CLACITE + GREEN
SMEC + ZEOLITES;
Alteration : MOD
BASALT IS DARK GRAY COLOR LOCALLY ALTERED TO GRAY-
BROWN;
Vesicles :
Location: Filling: SMEC,CALCITE
SMEC IS GREEN;
Groundmass : APHANITIC TO CRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <7
EUHEDRAL;
OLIVINE ( 5%)
Size(mm): <3
EUHEDRAL TO SUBHEDRAL, REPLACED BY CALCITE+GREEN
SMEC;
Replacement: CALCITE
FILLS VESICLES AND VEINS, FOUND IN BRECCIA MATRIX;
SMECTITE
Minerals Replaced: OL
GREEN, FILLS VESICLES AND VEINS, FOUND IN BRECCIA
MATRIX;
ZEOLITE
FILLS VEINS, FOUND IN BRECCIA MATRIX;
Leg : 51 Top/Bottom Interval(mm): 0/1340 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 373.94
Core: 27 Top of Core Depth (m) : 366.60
Sect: 5 Top of Section Depth(m): 372.60
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (3-30), 1B (28-45), 1C (30-35), 2A (46-54),
2B (53-61), 2C (61-64), 3 (66-80), 4 (83-88),
5 (90-105), 6 (107-116), 7A (119-127), 7B (124-134);
Texture : PHYRIC PILLOW BASALT WITH CHILLED GLASSY MARGINS IN
PCES 1A+4+5, GROUNDMASS IS APHANITIC TO
HOLOCRYSTALLINE;
Structure : VEINS FILLED BY CALCITE;
Alteration : FRESH TO SLIGHTLY;
Comments : BASALT IS DARK GRAY COLOR;
Vesicles : Size(mm): <1 Percent:
Location: Filling: CALCITE
SCARCE;
Groundmass : APHANITIC TO HOLOCRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <8
ALTERED;
COMBINATION ( 2-3%)
Size(mm): <5
OLIVINE+CLINOPYROXENE (REPLA%)
Size(mm): CED BY GRE
Replacement: CALCITE
FILLS VEINS AND VESICLES;
SMECTITE
GREEN;
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 375.58
Core: 27 Top of Core Depth (m) : 366.60
Sect: 6 Top of Section Depth(m): 374.10
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH TRACES OF INTERPILLOW BRECCIA;
Piece No. : PCE 1A (2-26), 1B (26-45), 1C (46-65), 1D (65-80),
2 (82-91), 3 (95-100), 4 (104-121), 5 (123-139),
6 (142-148);
Texture : PHYRIC PILLOW BASALT WITH GLASSY CHILLED MARGINS IN
PCES 5+6 AND TRACES OF INTERPILLOW BRECCIA IN PCES
5+6, GROUNDMASS IS APHANITIC TO CRYSTALLINE;
Structure : VEINS FILLED BY GREEN SMEC+CALCITE, INTERPILLOW
BRECCIA COMPOSED OF FRAGMENTS OF GLASS PARTIALLY
ALTERED TO GREEN SMEC OR POSSIBLY PALAGONITE IN A
MATRIX OF CALCITE AND ZEOLITES;
Alteration : MOD;
Comments : BASALT IS DARK GRAY COLOR;
Vesicles : VESICLES FILLED BY GREEN SMEC;
Groundmass : APHANITIC TO CRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <9
EUHEDRAL;
OLIVINE ( 5%)
Size(mm): <3
EUHEDRAL, REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
REPLACES OL PHENOS, PARTIALLY REPLACES GLASS IN
INTERPILLOW BRECCIA, FILLS VEINS AND VESICLES, ALL
SMEC IS GREEN;
CALCITE
FILLS VEINS, FOUND IN MATRIX OF BRECCIA;
PALAGONITE
Minerals Replaced: GLASS
FOUND IN BRECCIA;
ZEOLITE
FOUND IN MATRIX OF BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/ 610 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 376.21
Core: 27 Top of Core Depth (m) : 366.60
Sect: 7 Top of Section Depth(m): 375.60
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH INTERPILLOW BRECCIA;
Piece No. : PCE 1 (2-12), 2 (14-27), 3 (29-37), 4 (40-61);
Texture : PHYRIC PILLOW BASALT WITH GLASSY CHILLED MARGINS IN
PCE 2+3 AND INTERPILLOW BRECCIA IN PCES 2+3,
GROUNDMASS IS APHANITIC TO CRYSTALLINE;
Structure : VEINS NORMAL TO PILLOW MARGINS FILLED BY CALCITE,
THE 1CM THICK GLASSY MARGIN IN PCE 3 COMPOSED OF
HYALOCLASTITE SHARDS CEMENTED BY CALCITE IS
PARTIALLY DETACHED FROM THE UNDERLYING PILLOW;
Alteration : SLIGHTLY;
Comments : BASALT IS DARK GRAY COLOR;
Vesicles : SCARCE;
Groundmass : APHANITIC TO CRYSTALLINE GROUNDMASS;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <8
ALTERED;
OLIVINE ( 2%)
Size(mm): <5
REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS;
CALCITE
FILLS VEINS, FOUND AS MATRIX IN BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/1380 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 377.08
Core: 28 Top of Core Depth (m) : 375.70
Sect: 1 Top of Section Depth(m): 375.70
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH MINOR INTERPILLOW BRECCIA;
Piece No. : PCE 1A (2-26), 1B (26-30), 2 (31-35), 3A (38-73),
3B (73-90), 3C (90-102), 3D (102-109), 4 (111-138);
Texture : PHYRIC BASALT PILLOWS WITH 1-2CM THICK GLASSY
CHILLED MARGINS PCES 2+3A+3C+3D+4 AND MINOR
INTERPILLOW BRECCIA IN PCES 3C-4, GROUNDMASS IS
APHANITIC TO CRYSTALLINE;
Structure : INTERVALS 0-37 + 37-110 + 110-140CM REPRESENT
INDIVIDUAL PILLOWS OR PARTS OF PILLOWS BOUNDED BY
CHILL MARGINS, VEINS NORMAL TO PILLOW MARGINS FILLED
WITH CALCITE + MINOR PYRITE, VEINS ARE COMMON;
Alteration : SLIGHTLY;
Comments : BASALT IS COLORED A DARK GRAY;
Vesicles : Size(mm): <1 Percent:
Location: Filling: SMEC
SCARCE, SMEC IS GREEN;
Groundmass : APHANITIC TO CRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <10
OLIVINE ( <1%)
OL REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, FILLS VESICLES;
CALCITE
FILLS VEINS;
PYRITE
MINOR FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1390 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 378.59
Core: 28 Top of Core Depth (m) : 375.70
Sect: 2 Top of Section Depth(m): 377.20
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH INTERPILLOW BRECCIA AND
INTERPILLOW LIMESTONE;
Piece No. : PCE 1A (2-15), 1B (16-18), 2A (20-29), 2B (30-40),
2C (40-61), 3 (63-74), 4 (76-82), 5 (85-88),
6 (91-97), 7 (100-105), 8A (108-116), 8B (108-112),
8C (116-134), 8D (134-138);
Texture : PHYRIC BASALT PILLOWS WITH GLASSY CHILLED MARGINS IN
PCES 1A+1B+2A+4-8B, INTERPILLOW BRECCIA IN
PCES 4-8B, INTERPILLOW LIMESTONE IN PCE 6,
GROUNDMASS IS APHANITIC TO HYALOPILITIC NEAR PILLOW
MARGINS AND MICROLITIC IN PILLOW INTERIORS;
Structure : INTERVALS 0-20 + 20-90 + 105-140CM REPRESENT
INDIVIDUAL PILLOWS BOUNDED BY CHILLED MARGINS, VEINS
FILLED BY CALCITE AND GREEN SMEC, BRECCIA COMPOSED
OF FRAGMENTS OF GLASS PARTIALLY ALTERED TO
POSSIBLY PALAGONITE OR GREEN SMEC IN A MATRIX OF
CALCITE AND ZEOLITES, FINE GRAINED LIMESTONE IN PCE
6 COMPOSED OF CALCITE AND GREEN SMEC;
Alteration : MOD
BASALT IS DARK GRAY COLOR ALTERED TO GRAY-BROWN
ALONG VEINS;
Vesicles : VESICLES FILLED WITH CALCITE + GREEN SMEC;
Groundmass : APHANITIC TO HYALOPILITIC NEAR PILLOW MARGINS AND
MICROLITIC IN PILLOW INTERIORS;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <12
EUHEDRAL;
OLIVINE ( 5%)
Size(mm): <2
REPLACED BY CALCITE AND GREEN SMEC;
Replacement: CALCITE
Minerals Replaced: OL
REPLACES OL PHENOS, FILLS VESICLES AND VEINS,
FOUND AS MATRIX IN BRECCIA, FOUND IN LIMESTONE;
SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, FILLS VESICLES AND
VEINS, FOUND IN BRECCIA, FOUND IN LIMESTONE;
PALAGONITE
Minerals Replaced: GLASS
POSSIBLY FOUND IN BRECCIA;
ZEOLITE
FOUND IN MATRIX OF BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/1400 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 380.10
Core: 28 Top of Core Depth (m) : 375.70
Sect: 3 Top of Section Depth(m): 378.70
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH INTERPILLOW LIMESTONE;
Piece No. : PCE 1A (2-26), 1B (27-32), 1C (32-45), 1D (45-52),
1E (52-61), 1F (61-65), 1G (66-71), 1H (72-79),
2A (81-90), 2B (91-99), 2C (100-114), 2D (108-121),
2E (121-128), 3 (130-133), 4A (135-139),
4B (137-140);
Texture : PHYRIC BASALT PILLOWS WITH 1-2CM THICK APHYRIC
CHILLED MARGINS IN PCES 1A+1C-2A+0.5-1.0CM THICK
GLASSY RIMS IN PCES 1A + 1C-1E + 1G-2A AGAINST
INTERPILLOW LIMESTONE IN PCES 1A+1D+4, APHANITIC
TO HYALOPILITIC CHILLED MARGINS AND MICROLITIC
PILLOW INTERIORS;
Structure : INTERVALS 0-45 + 45-65 + 65-80 + 80-140CM REPRESENT
INDIVIDUAL PILLOWS OR PARTS OF PILLOWS BOUNDED BY
CHILLED MARGINS, VEINS ARE COMMON-NORMAL TO GLASSY
MARGINS FILLED WITH CALCITE + GREEN SMEC +
CELADONITE + MINOR PYRITE, GLASSY RIMS LOCALLY
DETACHED FROM ADJACENT PILLOWS PARTIALLY REPLACED
BY GREEN SMEC + POSSIBLY PALAGONITE AND CALCITE,
FINE-GRAINED WHITE TO GRAY-GREEN INTERPILLOW
LIMESTONE COMPOSED OF CALCITE + GREEN SMEC WITH
OCCASIONAL SHARDS OF GLASS;
Alteration : SLIGHTLY TO MOD
Comments : BASALT IS DARK GRAY COLOR;
Vesicles : VESICLES ARE SCARCE;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <8
ALTERED;
OLIVINE ( 1-2%)
Size(mm): <5
REPLACED BY GREEN SMEC;
Replacement: CALCITE
Minerals Replaced: GLASS
FILLS VEINS, REPLACES DETATCHED GLASSY RIMS, FOUND
IN LIMESTONE;
SMECTITE
Minerals Replaced: OL,GLASS
GREEN, REPLACES OL PHENOS, FILLS VEINS, REPLACES
DETACHED GLASSY RIMS, FOUND IN LIMESTONE;
CELADONITE
FILLS VEINS;
PYRITE
MINOR, FILLS VEINS;
PALAGONITE
Minerals Replaced: GLASS
REPLACES DETACHED GLASY RIMS;
Leg : 51 Top/Bottom Interval(mm): 0/1360 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 381.56
Core: 28 Top of Core Depth (m) : 375.70
Sect: 4 Top of Section Depth(m): 380.20
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH MINOR INTERPILLOW LIMESTONE AND
LIMESTONE BRECCIA;
Piece No. : PCE 1A (2-14), 1B (14-21), 2A (25-55), 2B (55-65),
2C (65-83), 2D (83-96), 2E (95-136);
Texture : PHYRIC BASALT PILLOW WITH GLASSY CHILLED MARGINS IN
PCES 1A + 2B + 2C AND MINOR INTERPILLOW LIMESTONE
AND LIMESTONE BRECCIA IN PCE 1A, GROUNDMASS IS
APHANITIC TO MICROLITIC;
Structure : INTERVAL 0-135CM REPRESENTS ONE PILLOW BOUNDED BY
CHILL MARGINS INCLUDING A LATERAL MARGIN BETWEEN
55-70CM, VEINS FILLED BY CALCITE + GREEN SMEC,
INTERPILLOW BRECCIA IN PCE 1A COMPOSED OF FRAGMENTS
OF GLASS PARTIALLY ALTERED TO POSSIBLY PALAGONITE
OR GREEN SMEC IN A FINE-GRAINED MATRIX OF CALCITE
AND GREEN SMEC;
Alteration : MOD
Comments : BASALT IS DARK GRAY COLOR;
Groundmass : APHANITIC TO MICROLITIC;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <3
EUHEDRAL, OCCASIONALLY TO 15MM WITH CARLSBAD
TWINS;
OLIVINE ( <5%)
Size(mm): <2
EUHEDRAL, REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
GREEN, REPLACES OL PHENOS, FILLS VEINS, REPLACES
GLASS AND IS IN MATRIX OF BRECCIA;
CALCITE
FILLS VEINS, FOUND IN MATRIX OF BRECCIA;
PALAGONITE
Minerals Replaced: GLASS
POSSIBLY REPLACES GLASS IN BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 383.17
Core: 28 Top of Core Depth (m) : 375.70
Sect: 5 Top of Section Depth(m): 381.70
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH INTERPILLOW LIMESTONE;
Piece No. : PCE 1A (2-7), 1B (7-13), 2 (15-31), 3 (33-82),
4A (85-95), 4B (95-102), 4C (103-117), 4D (113-121),
4E (121-126), 4F (126-136), 5 (138-146);
Texture : PHYRIC BASALT PILLOWS WITH WELL DEVELOPED GLASSY
CHILLED MARGINS PCES 2 + 4A + 5 AGAINST INTERPILLOW
LIMESTONE PCES 1A+1B+2+4A+5, GROUNDMASS IS APHANITIC
TO MICROLITIC;
Structure : INTERVALS 15-85 + 85-135 + 140-150CM REPRESENT
INDIVIDUAL PILLOWS OR PARTS OF PILLOWS BOUNDED BY
CHILLED MARGINS, VEINS COMMON-NORMAL TO GLASSY
MARGINS FILLED BY CALCITE AND POSSIBLY CELADONITE,
GREEN-GRAY INTERPILLOW LIMESTONE IS LAYERED TO
MASSIVE COMPOSED OF FINE-GRAINED CALCITE AND GREEN
SMEC WITH OCCASIONAL SHARDS OF GLASS PARTIALLY
REPLACED BY CALCITE + GREEN SMEC + POSSIBLY
PALAGONITE;
Alteration : FRESH TO SLIGHTLY
Comments : BASALT IS DARK GRAY COLOR;
Groundmass : APHANITIC TO MICROLITIC;
Phenocrysts: PLAGIOCLASE (20-25%)
Size(mm): <10
ALTERED;
OLIVINE ( 2-3%)
Size(mm): <5
REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
GREEN, REPLACES OL PHENOS, LIMESTONE COMPOSED OF
AND SHARDS OF GLASS IN LIMESTONE PARTIALLY
REPLACED BY GREEN SMEC;
CALCITE
Minerals Replaced: GLASS
FILLS VEINS, LIMESTONE COMPOSED OF AND SHARDS OF
GLASS IN LIMESTONE PARTIALLY REPLACED BY CALCITE;
CELADONITE
FILLS VEINS;
PALAGONITE
POSSIBLY REPLACES SHARDS OF GLASS IN LIMESTONE;
Leg : 51 Top/Bottom Interval(mm): 0/1300 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 384.50
Core: 28 Top of Core Depth (m) : 375.70
Sect: 6 Top of Section Depth(m): 383.20
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT WITH INTERPILLOW LIMESTONE;
Piece No. : PCE 1 (2-6), 2A (8-18), 2B1 (18-26), 2B2 (26-38),
2B3 (38-60), 2C (61-66), 2D (65-74), 2E (74-85),
2F (85-91), 3 (94-96), 4A (99-110), 4B (110-120),
4C (121-130);
Texture : PHYRIC BASALT PILLOWS WITH CHILLED MARGINS IN PCES
2A+2F+4A+4C AND INTERPILLOW LIMESTONE IN PCES
1+3, FINE-GRAINED GRAY-GREEN TO PINK INTERPILLOW
LIMESTONE FINELY LAYERED TO MASSIVE COMPOSED OF
CALCITE AND GREEN SMEC WITH OCCASIONAL SHARDS OF
GLASS PARTIALLY REPLACED BY CALCITE + GREEN SMEC AND
POSSIBLY PALAGONITE;
Structure : INTERVALS 8-92CM + 99-130CM REPRESENT INDIVIDUAL
PILLOWS, CHILLED PILLOW MARGINS LOCALLY DISPLAY
0.5-1.0CM THICK SPARSELY PHYRIC SLIGHTLY BRECCIATED
GLASSY RIMS CONTAINING FRAGMENTS OF DARK GRAY BASALT
AND 3 PERCENT PLAG PHENOS <2MM THESE ARE UNDERLAIN
BY A 3MM THICK ZONE CONTAINING SPHERES OF
DEVITRIFIED GLASS, VEINS FILLED BY CALCITE AND GREEN
SMEC;
Alteration : FRESH
ALL EXCEPT PCES 2A+4C;
MOD
PCES 2A+4C;
PILLOW INTERIORS ARE DARK GRAY-ALTERED TO LIGHT
GRAY GRAY-BROWN OR BROWN NEAR VEINS IN PCES 2A+4C;
Groundmass : MICROLITIC;
Phenocrysts: PLAGIOCLASE ( 7-15%)
Size(mm): <5
PARTIALLY REPLACED BY CLAY + CALCITE;
CLINOPYROXENE ( 3-5%)
Size(mm): <2
OLIVINE ( <1%)
Size(mm): <1
OL PARTIALLY REPLACED BY GREEN SMEC;
Replacement: CLAY
Minerals Replaced: PLAG
PARTIALLY REPLACES PLAG PHENOS;
CALCITE
Minerals Replaced: PLAG,GLASS
PARTIALLY REPLACES PLAG PHENOS, FILLS VEINS FOUND
IN MATRIX AND PARTIALLY REPLACING GLASS SHARDS IN
LIMESTONE OL,GLASS
SMECTITE
GREEN, PARTIALLY REPLACES OL PHENOS, FILLS VEINS,
FOUND IN MATRIX AND PARTIALLY REPLACING GLASS
SHARDS IN LIMESTONE;
PALAGONITE
Minerals Replaced: GLASS
POSSIBLY PARTIALLY REPLACES GLASS SHARDS IN
LIMESTONE;
Leg : 51 Top/Bottom Interval(mm): 0/ 980 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 385.68
Core: 28 Top of Core Depth (m) : 375.70
Sect: 7 Top of Section Depth(m): 384.70
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT WITH MINOR BRECCIA;
Piece No. : PCE 1A (1-16), 1B (16-24), 2 (26-31), 3A (34-51),
3B (51-62), 4 (64-68), 5A (70-78), 5B (77-85),
6A (87-95), 6B (96-98);
Texture : PHYRIC PILLOW BASALT WITH CHILLED MARGINS IN PCE 1A
AND MINOR BRECCIA IN PCE 1B, GROUNDMASS IS APHANITIC
TO MICROLITIC, BRECCIA COMPOSED OF BASALT FRAGMENTS
IN A CALCITE MATRIX;
Structure : NUMEROUS WIDE VEINS FILLED BY CALCITE + HEMATITE +
GREEN SMEC;
Alteration : MOD
PCES 1A-3B;
SLIGHTLY
PCES 4-6B;
Comments : BASALT IS DARK GRAY COLOR STRONGLY OXIDIZED TO
SHADES OF BROWN AND ORANGE IN PCES 1-3B;
Groundmass : APHANITIC TO MICROLITIC;
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): <5
ALTERED;
MAFIC ( 2-3%)
Size(mm): <5
REPLACED BY GREEN SMEC;
Replacement: CALCITE
FILLS VEINS, FOUND AS MATRIX IN BRECCIA;
SMECTITE
Minerals Replaced: MAFIC
REPLACES MAFIC PHENOS, FILLS VEINS;
HEMATITE
FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1410 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 386.21
Core: 29 Top of Core Depth (m) : 384.80
Sect: 1 Top of Section Depth(m): 384.80
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT WITH MINOR BRECCIA;
Piece No. : PCE 1 (3-7), 2 (11-17), 3 (21-36), 4A (37-45),
4B (43-49), 4C (49-64), 4D (65-71), 5 (74-92),
6 (96-106), 7 (111-114), 8 (119-122), 9 (124-141);
Texture : PHYRIC PILLOW BASALT WITH GLASSY CHILLED MARGINS IN
PCES 2+4D+7 AND MINOR BRECCIA IN PCES 1+2+4D,
BRECCIA COMPOSED OF FRAGMENTS OF GLASS REPLACED BY
CALCITE + GREEN SMEC + POSSIBLY PALAGONITE IN A
CALCITE MATRIX; GROUNDMASS IS HYALOPILITIC NEAR
MARGINS AND MICROLITIC IN PILLOW INTERIORS;
Structure : INTERVALS 10-65 + 70-105 + 120-140CM REPRESENT
INDIVIDUAL PILLOWS, VEINS FILLED BY CALCITE + GREEN
SMEC, VEINS IN PCE 2 ALSO CONTAIN YELLOW TO PINK
SECONDARY MINERALS;
Alteration : MOD
BASALT DARK GRAY ALTERED TO LIGHT-GRAY LIGHT-BROWN
RED-BROWN OR BROWN NEAR MARGINS OR VEINS IN PCES
2+6;
Groundmass : HYALOPILITIC NEAR MARGINS, MICROLITIC IN PILLOW
INTERIORS;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
OCCASIONALLY TO 18MM, REPLACED BY CALCITE + CLAY;
CLINOPYROXENE ( <5%)
Size(mm): <2
PARTLY REPLACED BY CALCITE + GREEN SMEC;
OLIVINE ( <1%)
Size(mm): <1
PARTIALLY REPLACED BY CALCITE + GREEN SMEC;
Replacement: CALCITE
Size(mm): P
Minerals Replaced: LAG,CPX,OL
REPLACES PLAG+CPX+OL PHENOS, FILLS VEINS, FOUND AS
MATRIX AND REPLACES GLASS FRAGMENTS IN BRECCIA;
SMECTITE
Minerals Replaced: CPX,OL,GLASS
GREEN, REPLACES CPX+OL PHENOS + GLASS FRAGMENTS IN
BRECCIA, FILLS VEINS;
PALAGONITE
Minerals Replaced: GLASS
POSSIBLY REPLACES GLASS FRAGMENTS IN BRECCIA;
CLAY
Minerals Replaced: PLAG
PARTIALLY REPLACES PLAG PHENOS;
VEINS IN PCE 2 ALSO CONTAIN YELLOW TO PINK
SECONDARY MINERALS;
Leg : 51 Top/Bottom Interval(mm): 0/1400 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 387.70
Core: 29 Top of Core Depth (m) : 384.80
Sect: 2 Top of Section Depth(m): 386.30
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH HYALOCLASTITE BRECCIA;
Piece No. : PCE 1A (1-11), 1B (12-16), 1C (17-25), 2A (27-33),
2B (34-37), 3A (39-45), 3B (45-54), 3C (53-78),
3D (78-88), 3E (88-105), 3F (106-120), 3G (120-132),
3H (132-140);
Texture : PHYRIC BASALT PILLOWS WITH CHILLED GLASSY MARGINS IN
PCES 1A+3B AND HYALOCLASTITE BRECCIA IN PCES 1B-3B
BRECCIA COMPOSED OF FRAGMENTS OF BASALT AND BASALTIC
GLASS IN A DARK FINE-GRAINED MATRIX OF GREEN
SMEC, GRNDMASS IS APHANITIC TO HYALOPILITIC
NEAR MARGINS AND MICROLITIC IN PILLOW INTERIORS;
Structure : INTERVALS 0-13CM + 48-140CM REPRESENT INDIVIDUAL
PILLOWS, VEINS FILLED BY CALCITE AND MINOR PYRITE;
Alteration : MOD
PCE 1A-3B;
SLIGHTLY
PCE 3C-3H;
Comments : BASALT IS DARK GRAY COLOR;
Groundmass : APHANITIC TO HYALOPILITIC NEAR MARGINS AND
MICROLITIC IN PILLOW INTERIORS;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <10
PARTLY REPLACED BY CALCITE AND CLAY;
OLIVINE ( 5%)
Size(mm): <5
ALSO POSSIBLE PYX;
Replacement: CALCITE
Minerals Replaced: PLAG,GLASS
FILLS VEINS, PARTLY REPLACES PLAG PHENOS, REPLACES
GLASS IN BRECCIA AND PILLOW MARGINS-ALONG CRACKS;
CLAY
Size(mm): P
Minerals Replaced: LAG
PARTIALLY REPLACES PLAG PHENOS;
PYRITE
MINOR, FILLS VEINS;
SMECTITE
Size(mm): GLASS
GREEN, MATRIX FOR BRECCIA, REPLACES GLASS ALONG
CRACKS IN BRECCIA AND PILLOW MARGINS;
PALAGONITE
Minerals Replaced: GLASS
POSSIBLY REPLACES GLASS ALONG CRACKS IN BRECCIA
AND PILLOW MARGINS;
Leg : 51 Top/Bottom Interval(mm): 0/1490 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 389.29
Core: 29 Top of Core Depth (m) : 384.80
Sect: 3 Top of Section Depth(m): 387.80
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH INTERPILLOW LIMESTONE;
Piece No. : PCE 1 (4-19), 2A (21-33), 2B (33-50), 3A (54-61),
3B (61-70), 4 (73-96), 5 (100-111), 6 (116-123),
7 (125-135), 8 (137-149);
Texture : PHYRIC BASALT PILLOWS WITH GLASSY CHILLED MARGINS IN
PCES 1+3+6-8 WITH INTERPILLOW LIMESTONE IN PCE 3B,
INTERPILLOW LIMESTONE COMPOSED OF CALCITE AND MINOR
GREEN SMEC, GROUNDMASS IS APHANITIC TO
HYALOPILITIC NEAR MARGINS AND MICROLITIC IN PILLOW
INTERIORS;
Structure : INTERVALS 0-65 + 65-125 + 125-150CM REPRESENT
INDIVIDUAL PILLOWS BOUNDED BY CHILLED MARGINS, VEINS
FILLED BY CALCITE, RADIAL CRACKS IN PCES 6-8;
Alteration : SLIGHTLY
Comments : BASALT IS DARK GRAY COLOR;
Groundmass : APHANITIC TO HYALOPILITIC NEAR MARGINS AND
MICROLITIC IN PILLOW INTERIORS, GROUNDMASS IN PCE
2 CONTAINS DISSEMINATED SULFIDES;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <5
OLIVINE ( 3-5%)
Size(mm): 1-3
POSSIBLY ALSO CPX;
Replacement: CALCITE
Minerals Replaced: GLASS
FILLS VEINS, FORMS LIMESTONE, REPLACES GLASS
ADJACENT TO SEDIMENTS AND VEINS;
SMECTITE
Minerals Replaced: GLASS
GREEN,MINOR FORMS LIMESTONE, REPLACES GLASS
ADJACENT TO SEDIMENTS AND VEINS;
PALAGONITE
Minerals Replaced: GLASS
REPLACES GLASS ADJACENT TO SEDIMENTS AND VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1430 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 390.73
Core: 29 Top of Core Depth (m) : 384.80
Sect: 4 Top of Section Depth(m): 389.30
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT WITH CEMENTED PILLOW BRECCIA;
Piece No. : PCE 1 (5-8), 2 (10-28), 3A (31-38), 3B (35-38),
3C (38-49), 4 (55-58), 5A (61-70), 5B (70-78),
6 (81-89), 7 (93-105), 8 (107-122), 9A (125-129),
9B (130-135), 9C (135-143);
Texture : PHYRIC PILLOW BASALT WITH GLASSY CHILLED MARGINS
IN PCES 2-7+9A+9B AND CEMENTED PILLOW BRECCIA IN
PCES 1-3A+6+9A+9B, BRECCIA COMPOSED OF
FRAGMENTS OF BASALT AND FRACTURED GLASS IN A MATRIX
OF CALCITE AND GREEN SMEC, GROUNDMASS IS
HYALOPILITIC TO MICROLITIC;
Structure : VEINS FILLED BY CALCITE AND SMALL SHARDS OF GLASS
LOCALLY NORMAL TO MARGINS, FRACTURES;
Alteration : FRESH TO SLIGHTLY
BASALT IS DARK GRAY COLOR ALTERED TO YELLOW BROWN
ALONG VEINS;
Groundmass : HYALOPILITIC TO MICROLITIC;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <7
PARTLY REPLACED BY CALCITE + CLAY;
CLINOPYROXENE ( 1%)
Size(mm): <2
PARTLY REPLACED BY CALCITE + GREEN SMEC;
OLIVINE ( <1%)
Size(mm): <1
Replacement: CALCITE
Minerals Replaced: PLAG,CPX,GLASS
PARTIALLY REPLACES PLAG + CPX PHENOS, FILLS VEINS,
FOUND AS MATRIX IN BRECCIA, PARTIALLY REPLACES
DEVITRIFIED GLASS ALONG VEINS-FRACTURES-AND
CONTACTS WITH BRECCIA;
CLAY
Minerals Replaced: PLAG
PARTLY REPLACES PLAG PHENOS;
SMECTITE
Minerals Replaced: CPX,BASALT,GLASS
GREEN, PARTLY REPLACES CPX PHENOS, FOUND AS MATRIX
IN BRECCIA, REPLACES BASALT FRAGMENTS ALONG
MARGINS, PARTIALLY REPLACES DEVITRIFIED GLASS
ALONG VEINS-FRACTURES-AND CONTACTS WITH BRECCIA;
PALAGONITE
Minerals Replaced: BASALT,GLASS
POSSIBLY REPLACES BASALT FRAGMENTS ALONG MARGINS,
POSSIBLY REPLACES DEVITRIFIED GLASS ALONG VEINS-
FRACTURES-AND CONTACTS WITH BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/1390 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 392.19
Core: 29 Top of Core Depth (m) : 384.80
Sect: 5 Top of Section Depth(m): 390.80
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (1-19), 2A (20-23), 2B (23-37), 2C (38-51),
2D (51-70), 2E (70-86), 2F (86-98), 3 (100-114),
4A (116-131), 4B (131-139);
Texture : PHYRIC BASALT PILLOWS WITH GLASSY CHILLED MARGINS IN
PCES 2E+2F+4B, GROUNDMASS IS HYALOPILITIC TO
MICROLITIC;
Structure : INTERVALS 0-1OOCM + 100-140CM REPRESENT INDIVIDUAL
PILLOWS OR PARTS OF PILLOWS, VEINS FILLED WITH
CALCITE;
Alteration : SLIGHTLY
Comments : BASALT IS DARK GRAY COLOR;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <10
OLIVINE ( 3-7%)
Size(mm): <2
OL PARTLY REPLACED BY CALCITE;
CLINOPYROXENE ( 2%)
Size(mm): <2
Groundmass : HYALOPILITIC TO MICROLITIC;
Replacement: CALCITE
Minerals Replaced: OL
FILLS VEINS, PARTLY REPLACES OL PHENOS;
Leg : 51 Top/Bottom Interval(mm): 0/1370 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 393.67
Core: 29 Top of Core Depth (m) : 384.80
Sect: 6 Top of Section Depth(m): 392.30
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT AND INTERPILLOW LIMESTONE;
Piece No. : PCE 1A (3-21), 1B (21-35), 1C (35-50), 2A (53-71),
2B (71-77), 2C (76-87), 3A (91-104), 3B (105-120),
4 (123-137);
Texture : PHYRIC BASALT PILLOWS WITH GLASSY CHILLED MARGINS IN
PCES 1A+3A AND INTERPILLOW LIMESTONE IN PCE 1A,
INTERPILLOW LIMESTONE FINELY LAYERED COMPOSED OF
CALCITE + MINOR GREEN SMEC, GROUNDMASS IS
HYALOPILITIC TO MICROLITIC;
Structure : VEINS FILLED BY CALCITE, INTERVALS 5-100CM + 100-140
CM REPRESENT INDIVIDUAL PILLOWS OR PARTS OF PILLOWS,
WELL PRESERVED CHILLED MARGIN IN PCE IA DISPLAYS A
6-7MM RIM OF GREEN DEVITRIFIED GLASS IN CONTACT WITH
THE SEDIMENTS THIS IS UNDERLAIN IN TURN BY A 15MM
THICK LAYER OF FRESH BLACK GLASS AND A 2MM THICK
LIGHT GRAY ZONE MARKING THE TRANSITION TO THE
SPARSELY PHYRIC BASALT OF THE PILLOW INTERIOR, THE
DEVITRIFIED TO FRESH GLASS TRANSITION IS MARKED BY A
THIN ZONE OF FRACTURED GLASS;
Alteration : FRESH TO SLIGHTLY;
Comments : BASALT IS DARK GRAY COLOR;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <5
FRESH TO PARTLY REPLACED BY CALCITE;
CLINOPYROXENE ( 2-5%)
Size(mm): 1-3
PARTLY REPLACED BY CALCITE;
OLIVINE ( <1%)
Size(mm): <1
PARTLY REPLACED BY CALCITE;
Groundmass : HYALOPILITIC TO MICROLITIC;
Replacement: CALCITE
Size(mm): PL
Minerals Replaced: AG,CPX,OL,GLASS
PARTLY REPLACES PLAG + OL + CPX PHENOS, FILLS
VEINS, FORMS INTERPILLOW LIMESTONE, PARTIALLY
REPLACES GLASS ALONG VEINS AND SEDIMENT CONTACTS;
SMECTITE
Minerals Replaced: GLASS
GREEN, MINOR AMOUNT FORMS INTERPILLOW LIMESTONE,
PARTIALLY REPLACES GLASS ALONG VEINS AND SEDIMENT
CONTACTS;
PALAGONITE
Minerals Replaced: GLASS
PARTIALLY REPLACES GLASS ALONG VEINS AND SEDIMENT
CONTACTS;
Leg : 51 Top/Bottom Interval(mm): 0/ 990 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 394.79
Core: 29 Top of Core Depth (m) : 384.80
Sect: 7 Top of Section Depth(m): 393.80
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCE 1A (3-19), 1B (19-36), 1C (36-39), 2A (42-52),
2B (52-62), 2C (62-78), 3 (84-88), 4 (92-99);
Texture : PHYRIC, GROUNDMASS IS MICROLITIC;
Structure : VEINS FILLED BY CALCITE + GREEN SMEC + PYRITE;
Alteration : SLIGHTLY
Comments : BASALT IS DARK GRAY COLOR;
Groundmass : MICROLITIC;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <3
FRESH TO PARTIALLY REPLACED BY CALCITE;
COMBINATION ( 1-2%)
Size(mm): <2
CPX+OL, REPLACED BY GREEN SMEC;
Replacement: CALCITE
Minerals Replaced: PLAG
PARTIALLY REPLACES PLAG PHENOS, FILLS VEINS;
PYRITE
FILLS VEINS;
SMECTITE
Minerals Replaced: PYX,OL
GREEN, REPLACES PYX + OL PHENOS, FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1250 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 395.15
Core: 30 Top of Core Depth (m) : 393.90
Sect: 1 Top of Section Depth(m): 393.90
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH TRACES OF INTERPILLOW BRECCIA;
Piece No. : PCE 1 (4-6), 2 (8-13), 3 (16-30), 4 (33-37),
5A (39-50), 5B (47-64), 5C (62-85), 6 (87-92),
7 (94-109), 8 (111-125);
Texture : PHYRIC BASALT PILLOWS WITH 10MM THICK CHILLED GLASSY
MARGINS IN PCES 4+6+7 AND TRACES OF INTERPILLOW
BRECCIA IN PCES 1+4+6, INTERPILLOW BRECCIA COMPOSED
OF SHARDS OF GLASS IN A MATRIX OF CALCITE AND GREEN
SMEC, GROUNDMASS IS APHANITIC TO CRYSTALLINE;
Structure : INTERVALS 30-92CM + 94-130CM REPRESENT INDIVIDUAL
PILLOWS OR PARTS OF PILLOWS, VEINS FILLED BY CALCITE
AND GREEN SMEC, VEINS IN PCE 2 HAVE ANALCITE
LININGS AND IRON HYDROXIDE (GOETHITE) CORES;
Alteration : MOD
BASALT IS DARK GRAY COLOR ALTERED TO GRAY-BROWN
ALONG VEINS;
Vesicles : Size(mm): 0.5 Percent: <1
Location: Filling: SMEC
GREEN;
Groundmass : APHANITIC TO CRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 30%)
Size(mm): 6
EUHEDRAL, PARTIALLY REPLACED BY GREEN SMEC;
OLIVINE ( 5%)
EUHEDRAL, COMPLETELY REPLACED BY IDDINGS + GREEN
SMEC + CALCITE, PHENOS SHOW EVIDENCE OF
CRYSTAL SETTLING;
Replacement: CALCITE
Minerals Replaced: OL
FILLS VEINS, REPLACES OL PHENOS, FORMS MATRIX IN
INTERPILLOW BRECCIA;
SMECTITE
Minerals Replaced: PLAG,OL
GREEN, PARTIALLY REPLACES PLAG PHENOS, COMPLETELY
REPLACES OL PHENOS, FILLS VESICLES AND VEINS,
FORMS MATRIX FOR BRECCIA;
IDDINGSITE
Minerals Replaced: OL
REPLACES OL PHENOS;
ANALCITE
LINES VEINS IN PCE 2;
FERROUS HYDROX MINS
FILLS VEINS IN PCE 2 (GOETHITE);
Leg : 51 Top/Bottom Interval(mm): 0/1320 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 396.72
Core: 30 Top of Core Depth (m) : 393.90
Sect: 2 Top of Section Depth(m): 395.40
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (3-9), 1B (9-29), 1C (28-33), 1D (33-44),
1E (45-65), 1F (65-71), 2A (72-85), 2B (85-95),
3 (98-101), 4A (102-115), 4B (114-132);
Texture : PHYRIC BASALT PILLOWS WITH 15MM THICK GLASSY CHILLED
MARGINS IN PCE 1F+2A+3+4, GROUNDMASS APHANITIC TO
CRYSTALLINE;
Structure : CHILLED MARGINS DELINEATE INDIVIDUAL PILLOWS OR
PARTS OF PILLOWS BETWEEN INTERVALS 0-71CM + 72-101CM
+ 101-132CM, VEINS FILLED BY CALCITE + GREEN
SMEC + ZEOLITES;
Alteration : MOD
BASALT IS DARK GRAY COLOR ALTERED TO GRAY-BROWN
NEAR MARGINS;
Vesicles : Size(mm): Percent: 2
Location: Filling: CALCITE,SMEC
SMEC IS GREEN;
Groundmass : APHANITIC TO CRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( <30%)
Size(mm): <6
EUHEDRAL;
OLIVINE ( <10%)
Size(mm): <2
EUHEDRAL, REPLACED BY GREEN SMEC
INCREASE IN SIZE OF PLAG PHENOS AND INCREASE IN
ABUNDANCE OF OL PHENOS FROM 0-10 PERCENT WITH
DEPTH WITHIN INDIVIDUAL PILLOWS SUGGESTS CRYSTAL
SETTLING;
Replacement: SMECTITE
GREEN, REPLACES OL PHENOS, FILLS VESICLES AND
VEINS;
CALCITE
FILLS VESICLES AND VEINS;
ZEOLITE
Leg : 51 Top/Bottom Interval(mm): 0/1360 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 398.26
Core: 30 Top of Core Depth (m) : 393.90
Sect: 3 Top of Section Depth(m): 396.90
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH MINOR INTERPILLOW BRECCIA;
Piece No. : PCE 1A (2-16), 1B (16-41), 2A (43-74), 2B (73-100),
2C (99-108), 3 (112-127), 4 (130-135);
Texture : PHYRIC PILLOW BASALT WITH CHILLED MARGIN IN PCE 3
AND MINOR INTERPILLOW BRECCIA, BRECCIA IN PCE 4
COMPOSED OF ELONGATE FRAGMENTS OF BASALTIC GLASS IN
A CALCITE MATRIX CUT BY VEINS OF SPARRY CALCITE +
ZEOLITES + CLAY, APHANITIC GROUNDMASS;
Structure : INTERVAL 0-130CM REPRESENTS PART OF AN INDIVIDUAL
PILLOW, VEINS FILLED BY CALCITE + GREEN SMEC,
VEINS CUTTING THROUGH BRECCIA FILLED BY SPARRY
CALCITE + ZEOLITES + CLAY;
Alteration : MOD
Comments : BASALT IS DARK GRAY COLOR;
Vesicles : Size(mm): Percent: 3
Location: Filling: SMEC,CALC,ZEOLITE
SMEC IS GREEN;
Groundmass : APHANITIC;
Phenocrysts: PLAGIOCLASE (10-30%)
Size(mm): <8
EUHEDRAL, OCCASIONAL MEGACRYST TO 12MM, LOCALLY
REPLACED BY CALCITE + ZEOLITES;
OLIVINE ( 1-10%)
Size(mm): <2
EUHEDRAL, COMPLETELY REPLACED BY GREEN SMEC;
Replacement: CALCITE
REPLACES PLAG PHENOS, FILLS VESICLES AND
VEINS THAT CUT BRECCIA;
FORMS MATRIX IN BRECCIA;
ZEOLITE
REPLACES PLAG PHENOS, FILLS VESICLES AND VEINS
THAT CUT BRECCIA;
SMECTITE
GREEN, REPLACES OL PHENOS, FILLS VESICLES AND
VEINS;
CLAY
FILLS VEINS THAT CUT BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/1390 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 399.79
Core: 30 Top of Core Depth (m) : 393.90
Sect: 4 Top of Section Depth(m): 398.40
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH MINOR INTERPILLOW LIMESTONE
BRECCIA;
Piece No. : PCE 1 (2-9), 2 (12-19), 3A (22-37), 3B (36-44),
4A (47-70), 4B (70-86), 4C (86-96), 4D (96-101),
4E (101-118), 5 (121-139);
Texture : PHYRIC BASALT PILLOWS WITH CHILLED MARGINS PCES 1+3B
+4A+4D+4E AND MINOR INTERPILLOW LIMESTONE BRECCIA,
INTERPILLOW BRECCIA COMPOSED OF FRAGMENTS OF BASALT
AND BASALTIC GLASS PARTIALLY ALTERED TO GREEN SMEC
AND POSSIBLE PALAGONITE IN A CALCITE MATRIX,
GROUNDMASS IS APHANITIC TO CRYSTALLINE;
Structure : INTERVALS 5-45CM + 45-102CM + 102-140CM REPRESENT
INDIVIDUAL PILLOWS OR PARTS OF PILLOWS, VEINS FILLED
BY CALCITE, GREEN SMEC;
Alteration : MOD
Comments : BASALT IS DARK GRAY COLOR;
Vesicles : Size(mm): Percent: <1
Location: Filling: CALCITE
Groundmass : APHANITIC TO CRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 30%)
Size(mm): 5-10
EUHEDRAL, FRESH TO PARTIALLY REPLACED BY GREEN
SMEC;
OLIVINE ( <1%)
COMPLETELY REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: PLAG,OL,GLASS
GREEN, REPLACES PLAG + OL PHENOS, FILLS VEINS,
PARTIALLY REPLACES GLASS IN BRECCIA;
CALCITE
FILLS VESICLES AND VEINS, FOUND AS MATRIX IN
BRECCIA;
PALAGONITE
Minerals Replaced: GLASS
POSSIBLY REPLACES GLASS IN BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/1380 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 401.28
Core: 30 Top of Core Depth (m) : 393.90
Sect: 5 Top of Section Depth(m): 399.90
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH INTERPILLOW LIMESTONE;
Piece No. : PCE 1A (2-25), 1B (22-32), 1C (32-50), 1D (50-56),
1E (55-64), 2A (66-71), 2B (71-75), 2C (72-81),
3 (83-86), 4 (88-90), 5 (92-103), 6A (106-115),
6B (115-130), 6C (130-138);
Texture : PHYRIC PILLOW BASALT WITH CHILLED MARGINS IN PCES
1E+2A+2B+5+6B+6C AND INTERPILLOW LIMESTONE IN PCES
2+4+5+6C, GROUNDMASS IS APHANITIC TO CRYSTALLINE;
Structure : VEINS FILLED BY CALCITE + GREEN SMEC, SPACES
BETWEEN PILLOWS FILLED BY RECRYSTALLIZED CALCITE OR
BY A MIXTURE OF CALCITE AND GREEN SMEC WITH SMEC
AND FRAGMENTS OF GLASS ALONG PILLOW MARGINS;
Alteration : MOD
Comments : BASALT IS DARK GRAY COLOR;
Groundmass : APHANITIC TO CRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 30%)
Size(mm): 4
EUHEDRAL;
OLIVINE ( 5%)
Size(mm): 3
EUHEDRAL, COMPLETELY ALTERED TO GREEN SMEC;
Replacement: CALCITE
FILLS VEINS, FILLS SPACES BETWEEN PILLOWS;
SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, FILLS VEINS, FILLS
SPACES BETWEEN PILLOWS;
ANALCITE
PCE 4;
Leg : 51 Top/Bottom Interval(mm): 0/1080 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 402.48
Core: 30 Top of Core Depth (m) : 393.90
Sect: 6 Top of Section Depth(m): 401.40
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT WITH VOLCANIC BRECCIA;
Piece No. : PCE 1 (2-7), 2 (8-13), 3 (15-25), 4 (28-32),
5A (36-43), 5B (43-51), 5C (51-66), 5D (66-87),
6 (91-96), 7 (100-108);
Texture : PHYRIC PILLOW BASALT WITH CHILLED GLASSY MARGINS IN
PCES 5A+7 AND VOLCANIC BRECCIA IN PCES 1-4, BRECCIA
COMPOSED OF FRAGMENTS OF BASALTIC GLASS AND PHYRIC
BASALT WITH GLASSY MARGINS IN A WHITE TO GREEN
MATRIX OF CALCITE AND GREEN SMEC, GROUNDMASS IS
APHANITIC TO CRYSTALLINE;
Structure : VEINS ABUNDANT FILLED BY CALCITE + GREEN SMEC;
Alteration : SLIGHTLY TO MOD
BASALT IS DARK GRAY COLOR ALTERED TO GRAY-BROWN
COLOR WITHIN 1CM OF MARGINS;
Groundmass : APHANITIC TO CRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <5
ALTERED;
CLINOPYROXENE ( 2-3%)
Size(mm): <5
OLIVINE ( 1%)
REPLACED BY GREEN SMEC;
Replacement: CALCITE
FILLS VEINS, FOUND IN BRECCIA MATRIX;
SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, FILLS VEINS, FOUND
IN BRECCIA MATRIX;
Leg : 51 Top/Bottom Interval(mm): 0/1440 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 404.34
Core: 30 Top of Core Depth (m) : 393.90
Sect: 7 Top of Section Depth(m): 402.90
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT WITH MINOR HYALOCLASTITE BRECCIA;
Piece No. : PCE 1A (1-5), 1B (4-22), 1C (22-52), 1D (52-62),
1E (62-70), 1F (70-75), 2 (76-82), 3 (84-106),
4 (108-113), 5 (115-124), 6A (126-138),
6B (138-144);
Texture : PHYRIC PILLOW BASALT WITH GLASSY CHILLED MARGINS IN
PCES 3+5+6A, AND MINOR HYALOCLASTITE BRECCIA IN PCES
5+6A, GROUNDMASS IS APHANITIC TO INTERSERTAL;
Structure : VEINS ABUNDANT <6MM WIDE FILLED BY CALCITE;
Alteration : SLIGHTLY TO MOD;
Comments : BASALT IS A DARK GRAY COLOR;
Groundmass : APHANITIC TO INTERSERTAL;
Phenocrysts: PLAGIOCLASE (20-25%)
ALTERED;
CLINOPYROXENE ( 5%)
Size(mm): <5
EUHEDRAL;
OLIVINE ( 2%)
Size(mm): <5
REPLACED BY CALCITE + GREEN SMEC;
Replacement: CALCITE
Minerals Replaced: OL
REPLACES OL PHENOS, FILLS VEINS;
SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS;
Leg : 51 Top/Bottom Interval(mm): 0/ 980 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 405.38
Core: 30 Top of Core Depth (m) : 393.90
Sect: 8 Top of Section Depth(m): 404.40
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT WITH HYALOCLASTITE BRECCIA;
Piece No. : PCE 1 (1-9), 2 (11-14), 3 (16-26), 4 (29-34),
5 (35-49), 6 (51-56), 7 (58-70), 8 (71-79),
9 (82-87), 10 (90-98);
Texture : PHYRIC PILLOW BASALT WITH CHILLED GLASSY MARGINS IN
PCES 1+5+7 AND HYALOCLASTITE BRECCIA IN A DARK GREEN
FINE-GRAINED MATRIX IN PCES 1+6+7+9+10, GROUNDMASS
IS APHANITIC TO FINE-GRAINED CRYSTRALLINE MATRIX;
Structure : VEINS FILLED BY COARSE GRAINED CALCITE IN PCES 1+4+5
+7;
Alteration : MOD
Comments : BASALT IS DARK GRAY COLOR;
Vesicles : CAVITIES FILLED BY COARSE-GRAINED CALCITE IN PCES
1+4+5+7;
Groundmass : APHANITIC TO FINE-GRAINED CRYSTALLINE MATRIX;
Phenocrysts: PLAGIOCLASE ( 25%)
Size(mm): <10
ALTERED, EUHEDRAL;
MAFIC ( 1%)
Size(mm): <3
POSSIBLY OLIVINE, REPLACED BY GREEN SMEC;
Replacement: SMECTITE
GREEN, REPLACES MAFIC PHENOS;
CALCITE
COARSE-GRAINED FILLS VEINS AND CAVITIES IN PCES
1+4+5+7;
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 404.47
Core: 31 Top of Core Depth (m) : 403.00
Sect: 1 Top of Section Depth(m): 403.00
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT WITH INTERPILLOW LIMESTONE;
Piece No. : PCE 1 (2-16), 2A (17-26), 2B (26-37), 2C (37-50),
2D (50-55), 2E (55-63), 2F (63-70), 2G (70-82),
2H (82-90), 2I (91-99), 2J (99-111), 2K (110-122),
2L (123-129), 2M (129-134), 2N (135-147);
Texture : PHYRIC PILLOW BASALT WITH BRECCIATED GLASSY MARGINS
IN PCE 2 AND GRAY-GREEN FINE-GRAINED INTERPILLOW
LIMESTONE IN PCES 1+2C, LIMESTONE COMPOSED OF
CALCITE WITH GREEN SMEC AND SHARDS OF GLASS +
CELADONITE, GROUNDMASS IS APHANITIC TO
HOLOCRYSTALLINE;
Structure : VEINS ARE NUMEROUS FILLED BY CALCITE AND GREEN SMEC;
Alteration : MOD
Comments : BASALT IS DARK GRAY COLOR;
Groundmass : APHANITIC TO HOLOCRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 25%)
Size(mm): <10
ALTERED, EUHEDRAL;
MAFIC
RARE;
Replacement: CALCITE
FILLS VEINS, FORMS INTERPILLOW LIMESTONE;
SMECTITE
GREEN, FILLS VEINS, FORMS INTERPILLOW LIMESTONE;
CELADONITE
FORMS INTERPILLOW LIMESTONE;
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 405.98
Core: 31 Top of Core Depth (m) : 403.00
Sect: 2 Top of Section Depth(m): 404.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT WITH INTERPILLOW LIMESTONE BRECCIA;
Piece No. : PCE 1A (3-15), 1B (15-31), 2A (34-50), 2B (50-62),
2C (62-70), 2D (70-85), 2E (84-100), 2F (100-115),
2G (115-127), 2H (128-130), 3A (132-141),
3B (141-148);
Texture : PHYRIC PILLOW BASALT WITH CHILLED MARGINS IN PCES
2H+3 AND INTERPILLOW LIMESTONE BRECCIA IN PCE 3,
BRECCIA COMPOSED OF FRAGMENTS OF GLASS PARTIALLY
ALTERED TO GREEN SMEC IN A CALCITE MATRIX,
GROUNDMASS IS APHANITIC TO CRYSTALLINE;
Structure : INTERVALS 0-130CM + 135-150CM REPRESENT PARTS OF
INDIVIDUAL PILLOWS, VEINS FILLED BY CALCITE + GREEN
SMEC + QUARTZ IN PCE 3;
Alteration : MOD
BASALT DARK GRAY LOCALLY ALTERED TO GRAY-BROWN;
Groundmass : APHANITIC TO CRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 25%)
Size(mm): <5
EUHEDRAL, FRESH TO PARTIALLY REPLACED BY GREEN
SMEC;
OLIVINE ( 2-5%)
Size(mm): 1-3
EUHEDRAL, REPLACED BY GREEN SMEC;
CLINOPYROXENE ( <<1%)
Size(mm): 0.5
ANHEDRAL;
Replacement: SMECTITE
Minerals Replaced: PLAG,OL,GLASS
GREEN, REPLACES PLAG + OL PHENOS, FILLS VEINS,
PARTIALLY REPLACES GLASS FRAGMENTS IN BRECCIA;
CALCITE
FILLS VEINS, FOUND AS MATRIX IN BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 407.48
Core: 31 Top of Core Depth (m) : 403.00
Sect: 3 Top of Section Depth(m): 406.00
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT AND MINOR INTERCALATED LIMESTONE;
Piece No. : PCE 1A (2-10), 1B (11-24), 1C (24-38), 1D (38-52),
1E (53-66), 1F (66-82), 1G (82-93), 1H (94-104),
1I (104-111), 1J (111-119), 2A (121-126),
2B (126-134), 3A (136-143), 3B (143-148);
Texture : PHYRIC PILLOW BASALT WITH GLASSY CHILLED MARGINS IN
PCE 3A AND MINOR INTERCALATED LIMESTONE COMPOSED OF
CALCITE AND MINOR GREEN SMEC IN PCES 2+3, BASALT IN
CONTACT WITH FINE-GRAINED GRAY-GREEN LIMESTONE IN
PCES 2A+2B DISPLAYS NO CHILLED MARGINS, BASALT IN
PCE 3 DISPLAYS GLASSY CHILLED MARGINS IN CONTACT
WITH LIMESTONE CONTAINING COARSE-GRAINED SPARRY
CALCITE, GROUNDMASS IS APHANITIC TO CRYSTALLINE;
Structure : VEINS COMMON <5MM WIDE FILLED BY CALCITE AND GREEN
SMEC;
Alteration : MOD
Comments : BASALT IS DARK GRAY COLOR;
Groundmass : APHANITIC TO CRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <10
EUHEDRAL, ALTERED;
MAFIC ( 2%)
Size(mm): <15
DARK GREEN;
Replacement: CALCITE
FILLS VEINS, COARSE-GRAINED SPARRY FOUND IN
LIMESTONE;
SMECTITE
GREEN, FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1450 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 408.95
Core: 31 Top of Core Depth (m) : 403.00
Sect: 4 Top of Section Depth(m): 407.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT WITH INTERPILLOW LIMESTONE;
Piece No. : PCE 1A (2-4), 1B (5-11), 1C (11-16), 2A (19-32),
2B (32-40), 2C (41-51), 2D (51-64), 2E (65-69),
3A (71-82), 3B (82-96), 3C (97-110), 3D (111-121),
3E (121-129), 3F (129-135), 4 (137-145);
Texture : PHYRIC BASALT PILLOWS WITH CHILLED GLASSY MARGINS IN
PCES 1C+2E+3A AND A WELL PRESERVED INTERVAL OF
INTERPILLOW POSSIBLE INTERLAYERED LIMESTONE IN PCE 1
LIMESTONE IN PCE 1A-1C COMPOSED OF CALCITE AND MINOR
GREEN CLAY, GROUNDMASS IS APHANITIC TO CRYSTALLINE
OFTEN MICROLITIC;
Structure : INTERVALS 10-70CM + 70-145CM REPRESENT INDIVIDUAL
PILLOWS, VEINS ARE COMMON AND ARE FILLED BY CALCITE+
GREEN SMEC, LIMESTONE CUT IN PCE 1B BY A VEIN OF THE
SAME MATERIAL, SEDIMENTS BOUNDED ABOVE AND BELOW
BY CHILLED PILLOW MARGINS THE UPPER OF WHICH IS
FRAGMENTED AND ENTRAINED IN THE SEDIMENTS NEXT TO
THE MARGIN WHILE THE LOWER IS HYDRATED AGAINST THE
SEDIMENTS IN LIMESTONE IN PCES 1A-1C, LIMESTONE MAY
SEPARATE TWO DISTINCT FLOWS;
Alteration : MOD
0-105CM;
EXT
105-145CM;
BASALT IS DARK GRAY COLOR ALTERED TO PALE BROWN OR
RED-BROWN IN PCES 3C-4;
Vesicles : PCES 2B+2C CONTAIN A LARGE FILLED CAVITY;
Groundmass : APHANITIC TO CRYSTALLINE OFTEN MICROLITIC;
Phenocrysts: PLAGIOCLASE ( 25%)
Size(mm): <5
EUHEDRAL;
OLIVINE ( 3%)
Size(mm): <1
REPLACED BY GREEN SMEC;
CLINOPYROXENE
ANHEDRAL, RARE;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, FILLS VEINS;
CALCITE
FILLS VEINS, FORMS LIMESTONE;
CLAY
MINOR GREEN FORMS LIMESTONE;
Leg : 51 Top/Bottom Interval(mm): 0/ 730 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 409.73
Core: 31 Top of Core Depth (m) : 403.00
Sect: 5 Top of Section Depth(m): 409.00
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH WELL PRESERVED INTERPILLOW
FILLINGS;
Piece No. : PCE 1 (2-5), 2A (7-21), 2B (21-26), 2C (26-35),
2D (35-43), 2E (42-51), 3 (55-62), 4 (66-73);
Texture : PHYRIC PILLOW BASALT WITH CHILLED MARGINS AND WELL
PRESERVED INTERPILLOW FILLINGS IN PCE 4, INTERPILLOW
FILLING IN PCE 4 COMPOSED OF GREEN SMEC, CHILLED
MARGINS IN PCE 4 DEVITRIFIED PARTIALLY REPLACED BY
GREEN SMEC;
Structure : VEINS FILLED BY CALCITE;
Alteration : EXT
O-35CM;
MOD
35-73CM;
Comments : BASALT IS DARK GRAY COLOR;
Groundmass : APHANITIC TO CRYSTALLINE OFTEN MICROLITIC;
Phenocrysts: PLAGIOCLASE ( 25%)
Size(mm): 4
EUHEDRAL, PARTIALLY REPLACED BY GREEN SMEC;
OLIVINE ( 5%)
Size(mm): 2
EUHEDRAL, REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: PLAG,OL
GREEN, PARTIALLY REPLACES PLAG + OL PHENOS;
CALCITE
FILLS VEINS;
PCE 1 CONSISTS ENTIRELY OF WHITE SECONDARY
MINERALS;
Leg : 51 Top/Bottom Interval(mm): 0/ 710 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 412.81
Core: 32 Top of Core Depth (m) : 412.10
Sect: 1 Top of Section Depth(m): 412.10
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (2-12), 2A (15-21), 2B (21-34), 2C (34-41),
2D (41-48), 3A (51-59), 3B (59-65), 3C (65-71);
Texture : PHYRIC PILLOW BASALT AND PILLOW BRECCIA PCES 2B-2D+
3C WITH CHILLED MARGINS IN PCES 2D+3A+3C, BRECCIA
COMPOSED OF ANGULAR CLASTS AND FRAGMENTS OF BASALT
AND GLASS IN A MATRIX OF CALCITE AND GREEN SMEC
FRAGMENTS OF GLASS AND BASALT AND SURFACES OF LARGER
CLASTS DEVITRIFIED PARTIALLY REPLACED BY GREEN
SMEC, APHANITIC TO HOLOCRYSTALLINE OFTEN
MICROLITIC GROUNDMASS;
Structure : VEINS FILLED BY CALCITE, BRECCIA MATRIX IN CONTACT
WITH BASALT ALONG BOTH HOLOCRYSTALLINE AND APHANITIC
SURFACES;
Alteration : SLIGHTLY TO MOD
Comments : BASALT IS DARK GRAY COLOR;
Vesicles :
Location: Filling: CALCITE
RARE;
Groundmass : APHANITIC TO HOLOCRYSTALLINE-OFTEN MICROLITIC;
Phenocrysts: PLAGIOCLASE ( 25%)
Size(mm): <10
EUHEDRAL;
OLIVINE ( 5%)
Size(mm): <2
EUHEDRAL, REPLACED BY GREEN SMEC;
Replacement: CALCITE
FILLS VEINS AND RARE VESICLES, FOUND AS MATRIX IN
BRECCIA;
SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, FOUND AS MATRIX IN
BRECCIA, PARTIALLY REPLACES SURFACES OF LARGER
CLASTS AND DEVITRIFIED FRAGMENTS OF GLASS AND
BASALT IN BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 710/1410 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 413.51
Core: 32 Top of Core Depth (m) : 412.10
Sect: 1 Top of Section Depth(m): 412.81
LITHOLOGY: PLAG-CPX-OL BASALT;
MASSIVE BASALT;
Piece No. : PCE 3D (71-91), 3E (91-101), 3F (101-106),
3G (103-113), 3H (113-130), 3I (129-141);
Texture : PHYRIC BASALT WITH A CHILLED MARGIN IN THE TOP OF
PCE 3D;
Structure : MASSIVE, MINOR CALCITE-FILLED VEINS;
Alteration : SLIGHTLY
Comments : BASALT IS DARK GRAY COLOR;
Groundmass : APHANITIC NEAR THE MARGIN AND INTERSERTAL TO
SUBOPHITIC THROUGH REST WITH GRAINSIZE INCREASING
WITH DEPTH BETWEEN 75-140CM;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): 5
EUHEDRAL;
CLINOPYROXENE ( <5%)
ANHEDRAL;
OLIVINE
REPLACED BY GREEN SMEC;
Replacement: CALCITE
MINOR-FILLS VEINS;
SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS;
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 415.07
Core: 32 Top of Core Depth (m) : 412.10
Sect: 2 Top of Section Depth(m): 413.60
LITHOLOGY: PLAG PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1 (0-53), 2A (55-68), 2B (68-111), 2C (112-147);
Texture : PHYRIC BASALT WITH A GRAY SUBOPHITIC GROUNDMASS
CONTAINING PLAG MICROLITES IN AUGITE;
Structure : MASSIVE, VEINS FILLED BY CALCITE + GREEN SMEC;
Alteration : SLIGHTLY
Comments : PCE 1 CONTINUOUS WITH PCE 3 OF PREVIOUS SECTION;
Vesicles : COMMON, FILLED BY CALCITE OR GREEN SMEC +
PYRITE OR ZONED WITH GREEN SMEC LININGS AND
CORES OF CALCITE, BASALT ZONED ON BASIS OF
VESICLE FILLINGS;
Groundmass : PLAGIOCLASE
CLINOPYROXENE
GRAY SUBOPHITIC CONTAINING PLAG MICROLITES IN
AUGITE+DISSEMINATED CALCITE+MINOR PYRITE;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): 2-3
Replacement: CALCITE
DISSEMINATED IN GROUNDMASS, FILLS VESICLES AND
VEINS;
PYRITE
MINOR AMOUNT FOUND IN GROUNDMASS, FOUND IN
VESICLES;
SMECTITE
GREEN, FOUND IN VESICLES, FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1230 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 416.33
Core: 32 Top of Core Depth (m) : 412.10
Sect: 3 Top of Section Depth(m): 415.10
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1A (1-7), 1B (4-7), 1C (7-19), 1D (18-21),
1E (21-31), 1F (32-51), 1GA (52-55), 1GB (54-61),
1GC (61-74), 1H (74-82), 1I (81-86), 1J (86-91),
1K1 (91-95), 1K2 (92-106), 1L (106-111),
1M (112-123);
Texture : PHYRIC BASALT WITH A GRAY SUBOPHITIC GROUNDMASS
CONTAINING PLAG MICROLITES IN AUGITE;
Structure : MASSIVE, VEINS FILLED BY CALCITE AND GREEN TO BROWN
SMEC;
Alteration : SLIGHTLY TO MOD;
Vesicles : Size(mm): 0.5-1.0 Percent: <2
Location: Filling: CALCITE
Groundmass : PLAGIOCLASE
CLINOPYROXENE
GRAY-SUBOPHITIC CONTAINING PLAG MICROLITES IN
AUGITE, ALONG VEINS LOCALLY CONTAINS DISSEMINATED
SULFIDES;
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): <7
CLINOPYROXENE ( 3%)
Size(mm): 1-2
OLIVINE ( <1%)
Size(mm): <0.5
REPLACED BY GREEN SMEC;
Replacement: CALCITE
FILLS VESICLES AND VEINS;
SMECTITE
Minerals Replaced: OL
GREEN REPLACES OL PHENOS, GREEN TO BROWN FILLS
VEINS;
SULFIDES
DISSEMINATED, REPLACES GROUNDMASS ALONG VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1200 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 417.80
Core: 32 Top of Core Depth (m) : 412.10
Sect: 4 Top of Section Depth(m): 416.60
LITHOLOGY: PLAG PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1A (2-34), 1B (35-63), 1C (63-85), 1D (86-103),
1E (102-120);
Texture : PHYRIC BASALT WITH A GRAY SUBOPHITIC GROUNDMASS
CONTAINING PLAG MICROLITES IN AUGITE;
Structure : MASSIVE;
VEINS FILLED BY GREEN SMEC FOLLOWED BY CALCITE;
Alteration : SLIGHTLY TO MOD;
Vesicles : INTERVAL 0-20CM CONTAINS A SMALL NUMBER OF
VESICLES FILLED BY CALCITE AND GREEN SMEC;
Groundmass : PLAGIOCLASE
CLINOPYROXENE
GRAY SUBOPHITIC GROUNDMASS CONTAINING PLAG
MICROLITES IN AUGITE AND DISSEMINATED PYRITE;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <5
EUHEDRAL;
Replacement: CALCITE
FILLS VEINS + VESICLES;
SMECTITE
GREEN, FILLS VEINS + VESICLES;
PYRITE
DISSEMINATED, FOUND IN GROUNDMASS;
Leg : 51 Top/Bottom Interval(mm): 0/1490 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 419.59
Core: 32 Top of Core Depth (m) : 412.10
Sect: 5 Top of Section Depth(m): 418.10
LITHOLOGY: PLAG PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1A (2-39), 1B (36-46), 1C (46-69), 1D (56-69),
2A (71-109), 2B (109-149);
Texture : PHYRIC;
Structure : MASSIVE, VEINS FILLED BY CALCITE + GREEN SMEC;
Alteration : SLIGHTLY
Vesicles :
Location: Filling: CALCITE,SMEC
RARE, SMEC IS GREEN;
Groundmass : PLAGIOCLASE
CLINOPYROXENE
GRAY SUBOPHITIC GROUNDMASS CONTAINING PLAG
MICROLITES IN AUGITE;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <5
EUHEDRAL, SLIGHTLY ALTERED;
Replacement: CALCITE
FILLS VEINS + VESICLES;
SMECTITE
GREEN, FILLS VEINS + VESICLES;
Leg : 51 Top/Bottom Interval(mm): 0/1400 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 421.00
Core: 32 Top of Core Depth (m) : 412.10
Sect: 6 Top of Section Depth(m): 419.60
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1A (3-15), 1B (15-28), 1C (28-41), 1D (35-52),
1E (52-71), 2 (74-77), 3 (80-90), 4A (92-106),
4B (106-111), 4C (107-118), 4D (119-132),
4E (130-140);
Texture : PHYRIC;
Structure : MASSIVE, VEINS FILLED BY CALCITE + WHITE CLAY;
Alteration : SLIGHTLY
BASALT DISPLAYS 1-2CM WIDE DARK GREEN TO YELLOW-
BROWN ZONED ALTERATION HALOES ALONG VEINS DUE TO
PARTIAL REPLACEMENT BY CALCITE AND GREEN TO BROWN
SMEC;
Groundmass : PLAGIOCLASE
CLINOPYROXENE
GRAY SUBOPHITIC GROUNDMASS CONTAINING MINOR
DISSEMINATED CALCITE + PYRITE;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <5
CLINOPYROXENE ( 7%)
Size(mm): <1
AUGITE, PARTIALLY REPLACED BY GREEN SMEC;
OLIVINE ( <1%)
Size(mm): <0.5
COMPLETELY REPLACED BY GREEN SMEC;
Replacement: CALCITE
FILLS VEINS, REPLACES BASALT, MINOR-DISSEMINATED
FOUND IN GROUNDMASS;
SMECTITE
Minerals Replaced: CPX,OL
GREEN, TOTALLY REPLACES OL PHENOS, PARTIALLY
REPLACES CPX PHENOS, GREEN TO BROWN REPLACES
BASALT;
PYRITE
FOUND IN GROUNDMASS;
CLAY
WHITE, FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/ 200 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 421.30
Core: 32 Top of Core Depth (m) : 412.10
Sect: 7 Top of Section Depth(m): 421.10
LITHOLOGY: PLAG-CPX PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1 (3-20);
Texture : PHYRIC;
Structure : MASSIVE, VEINS FILLED BY GREEN TO BROWN SMEC + MINOR
CALCITE;
Alteration : SLIGHTLY
BASALT ALTERED TO GRAY-GREEN OR YELLOW-BROWN ALONG
VEINS DUE TO PARTIAL REPLACEMENT BY CALCITE AND
GREEN TO BROWN SMEC;
Comments : GROUNDMASS COLOR IS GRAY;
Groundmass : PLAGIOCLASE
CLINOPYROXENE
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): <4
SLIGHTLY ALTERED;
CLINOPYROXENE ( 10%)
Size(mm): <0.5
FRESH TO PARTIALLY REPLACED BY GREEN SMEC;
Replacement: SMECTITE
GREEN PARTIALLY REPLACES CPX PHENOS, GREEN TO
BROWN FILLS VEINS AND REPLACES BASALT ADJACENT TO
VEINS;
CALCITE
MINOR AMOUNT FILLS VEINS, PARTIALLY REPLACES
BASALT ADJACENT TO VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1410 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 422.51
Core: 33 Top of Core Depth (m) : 421.10
Sect: 1 Top of Section Depth(m): 421.10
LITHOLOGY: PLAG PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1A (1-19), 1B (19-31), 1C (31-36), 1D (36-46),
1E (46-52), 2 (55-58), 3A (60-66), 3B (64-70),
3C (70-81), 3D (81-93), 3E (92-105), 3F (104-111),
3G (111-120), 3H (119-127), 3I (127-141);
Texture : PHYRIC;
Structure : MASSIVE, VEINS ARE SCARCE FILLED WITH CALCITE;
Alteration : SLIGHTLY
Groundmass : PLAGIOCLASE
CLINOPYROXENE
OLIVINE
OPAQUE MINERALS
GRAY SUBOPHITIC CONTAINING PLAG MICROLITES IN
AUGITE + OLIVINE + MINOR OPAQUES;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <4
EUHEDRAL, SLIGHTLY ALTERED;
Replacement: CALCITE
FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1450 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 424.05
Core: 33 Top of Core Depth (m) : 421.10
Sect: 2 Top of Section Depth(m): 422.60
LITHOLOGY: PLAG-CPX PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1A (3-13), 1B1 (13-18), 1B2 (16-26), 2A (30-39),
2B (39-51), 2C (51-64), 2D (64-78), 2E (79-92),
3 (96-106), 4A (108-119), 4B (120-131),
4C (132-145);
Texture : PHYRIC;
Structure : MASSIVE, VEINS FILLED BY CALCITE + GREEN TO YELLOW-
GREEN OR BROWN SMEC;
Alteration : FRESH TO SLIGHTLY
BASALT IS ALTERED TO LIGHT YELLOW-BROWN ALONG
VEINS, PCE 2E DISPLAYS A THICK LIGHT GREEN TO
BROWN ZONED ALTERATION HALO ALONG VEINS DUE TO
PARTIAL REPLACEMENT OF GROUNDMASS BY GREEN TO
BROWN SMEC;
Groundmass : PLAGIOCLASE
CLINOPYROXENE
OLIVINE
MINOR OLIVINE;
GRAY HOLOCRYSTALLINE GROUNDMASS WITH TRACES OF
INTERSTITIAL CALCITE + SULFIDES;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <10
CLINOPYROXENE ( 10%)
Size(mm): <0.5
PARTIALLY REPLACED BY GREEN SMEC;
Replacement: CALCITE
INTERSTITIAL FOUND IN GROUNDMASS, FILLS VEINS;
SMECTITE
GREEN, YELLOW GREEN, BROWN, PARTIALLY REPLACES
GROUNDMASS TO FORM ALTERATION HALOS ALONG VEINS,
PARTIALLY REPLACES CPX PHENOS, FILLS VEINS;
SULFIDES
TRACES FOND IN GROUNDMASS;
Leg : 51 Top/Bottom Interval(mm): 0/1460 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 425.56
Core: 33 Top of Core Depth (m) : 421.10
Sect: 3 Top of Section Depth(m): 424.10
LITHOLOGY: PLAG-OL PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1 (2-11), 2 (14-20), 3A (21-35), 3B (36-49),
3C (50-59), 4A (60-71), 4B (71-86), 4C (86-100),
4D (101-110), 4E (110-115), 5 (120-132),
6 (133-146);
Texture : PHYRIC, SUBOPHITIC GROUNDMASS,MEDIUM-GRAINED;
Structure : MASSIVE, VEINS FILLED BY CALCITE AND GREEN SMEC;
Alteration : SLIGHTLY
Groundmass : PLAGIOCLASE
CLINOPYROXENE
OLIVINE
OXIDES
OXIDES ARE MINOR;
Comments : GROUNDMASS COLOR IS GRAY;
Phenocrysts: PLAGIOCLASE ( <10%)
Size(mm): <7
PARTLY REPLACED BY ZEOLITES;
OLIVINE ( <1%)
Size(mm): 1-2
ALTERED;
Replacement: ZEOLITE
Minerals Replaced: PLAG
CALCITE
FILLS VEINS;
SMECTITE
GREEN, FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1440 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 427.04
Core: 33 Top of Core Depth (m) : 421.10
Sect: 4 Top of Section Depth(m): 425.60
LITHOLOGY: PLAG-CPX PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1 (4-18), 2A (21-33), 2B (35-46), 2C (47-71),
2D (72-86), 2E (86-101), 2F (102-116), 2G (116-130),
2H (131-141);
Texture : PHYRIC;
Structure : MASSIVE, VEINS FILLED BY GREEN TO BROWN SMEC;
Alteration : FRESH TO SLIGHTLY
Groundmass : PLAGIOCLASE
CLINOPYROXENE
OLIVINE
MINOR;
GRAY, SUBOPHITIC;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <8
CLINOPYROXENE (15-20%)
Size(mm): <1
PARTIALLY REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: CPX
GREEN, REPLACES PHENOS;
SMECTITE
GREEN TO BROWN, FILLS VEINS, BASALT DISPLAYS
YELLOW-BROWN OR GREEN TO BROWN ZONED ALTERATION
HALOES ALONG VEINS DUE TO PARTIAL REPLACEMENT OF
GROUNDMASS;
CALCITE
DISSEMINATED TRACES IN GROUNDMASS;
Leg : 51 Top/Bottom Interval(mm): 0/1450 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 428.55
Core: 33 Top of Core Depth (m) : 421.10
Sect: 5 Top of Section Depth(m): 427.10
LITHOLOGY: PLAG PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1 (2-15), 2A (16-30), 2B (31-40), 2C (41-55)
2D (55-69), 2E (69-84), 3A (87-94), 3B (92-101),
3C (101-111), 4 (113-129), 5 (131-145);
Texture : PHYRIC, MEDIUM-GRAINED HOLOCRYSTALLINE GROUNDMASS;
Structure : MASSIVE, VEINS FILLED BY CALCITE AND GREEN SMEC;
Alteration : SLIGHTLY
Groundmass : PLAGIOCLASE
ABUNDANT;
OLIVINE ( 20%)
CLINOPYROXENE
GRAY, HOLOCRYSTALLINE, MEDIUM-GRAINED;
Phenocrysts: PLAGIOCLASE (15-20%)
OLIVINE
MICROPHENOS, COMMON;
CLINOPYROXENE
MICROPHENOS, COMMON;
Replacement: SULFIDES
MINOR, FOUND IN GROUNDMASS;
OXIDES
FOUND IN GROUNDMASS;
CALCITE
Minerals Replaced: OL
REPLACES OL PHENOS IN PCES 1-4;
SMECTITE
IDDINGSITE
Minerals Replaced: OL
REPLACES OL PHENOS IN PCES 1-4,
GREEN, FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/ 280 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 428.88
Core: 33 Top of Core Depth (m) : 421.10
Sect: 6 Top of Section Depth(m): 428.60
LITHOLOGY: PLAG PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1A (4-19), 1B (20-28);
Texture : PHYRIC;
Structure : MASSIVE, VEINS FILLED BY CALCITE AND GREEN SMEC;
Alteration : MOD
Groundmass : PLAGIOCLASE (30-40%)
CLINOPYROXENE ( 25%)
OLIVINE (20-30%)
GRAY, HOLOCRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <7
PARTIALLY ALTERED;
Replacement: CALCITE
FILLS VEINS;
SMECTITE
GREEN, FILLS VEINS;
IDDINGSITE
Minerals Replaced: OL
Leg : 51 Top/Bottom Interval(mm): 0/1280 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 430.78
Core: 34 Top of Core Depth (m) : 429.50
Sect: 1 Top of Section Depth(m): 429.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1A (3-14), 1B (9-37), 1C (37-77), 1D (77-101),
2 (104-128);
Texture : PHYRIC;
Structure : MASSIVE, VEINS FILLED BY DARK GREEN TO BROWN SMEC;
Alteration : FRESH TO SLIGHTLY;
Vesicles :
Location: Filling: CALCITE
SCARCE;
Groundmass : GRAY, SUBOPHITIC;
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): <4
FRESH TO PARTIALLY REPLACED BY CALCITE;
CLINOPYROXENE ( 5%)
Size(mm): <1
FRESH TO PARTIALLY REPLACED BY GREEN SMEC;
OLIVINE ( <3%)
Size(mm): <0.5
REPLACED BY GREEN SMEC OR SERPENTINE;
Replacement: SMECTITE
GREEN TO BROWN, BASALT ALTERED TO GREEN OR BROWN
ALONG VEINS DUE TO PARTIAL REPLACEMENT, FILLS
VEINS;
SMECTITE
Minerals Replaced: CPX,OL
GREEN;
PARTIALLY REPLACES CPX + OL PHENOS;
CALCITE
Minerals Replaced: PLAG
REPLACES PLAG PHENOS, FILLS VESICLES;
SERPENTINITE
POSSIBLY REPLACES OL PHENOS;
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 432.47
Core: 34 Top of Core Depth (m) : 429.50
Sect: 2 Top of Section Depth(m): 431.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1A (3-31), 1B (29-51), 1C (48-64), 1D (64-98),
1E (98-147);
Texture : PHYRIC, FINE-GRAINED MODERATELY PHYRIC BASALT ALONG
VEINS IN PCES 1D + 1E;
Structure : MASSIVE, VEINS FILLED BY CALCITE AND GREEN TO YELLOW
BROWN OR BROWN SMEC;
Alteration : SLIGHTLY TO MOD;
Groundmass : GRAY, COARSE-GRAINED, SUBOPHITIC;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <4
CLINOPYROXENE ( 8-10%)
Size(mm): <2
OLIVINE ( 1%)
Size(mm): <0.5
OL REPLACED BY GREEN SMEC;
Replacement: SULFIDES
DISSEMINATED TRACES IN GROUNDMASS;
SMECTITE
GREEN TO BROWN, PARTIALLY REPLACES FINE-GRAINED
MOD PHYRIC BASALT ALONG VEINS IN PCES 1D + 1E,
FILLS VEINS, GREEN REPLACES OL PHENOS;
CALCITE
PARTIALLY REPLACES FINE-GRAINED MOD PHYRIC BASALT
ALONG VEINS IN PCES 1D + 1E, FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1200 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 433.70
Core: 34 Top of Core Depth (m) : 429.50
Sect: 3 Top of Section Depth(m): 432.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : 1A (2-15), 1B (16-36), 1C (27-56), 1D (56-76),
1E (76-102), 1F (102-120);
Texture : PHYRIC, MEDIUM-GRAINED SUBOPHITIC GROUNDMASS;
Structure : MASSIVE, VEINS FILLED BY CALCITE + GREEN SMEC;
Alteration : FRESH TO SLIGHTLY;
Groundmass : PLAGIOCLASE
CLINOPYROXENE
OLIVINE
GRAY, MEDIUM GRAINED SUBOPHITIC;
Phenocrysts: PLAGIOCLASE ( <5%)
OLIVINE ( <3%)
LOCALLY ABUNDANT, REPLACED BY IDDINGS + CALCITE;
Replacement: IDDINGSITE
Minerals Replaced: OL
REPLACES OL PHENOS;
CALCITE
Minerals Replaced: OL
REPLACES OL PHENOS, FILLS VEINS;
SMECTITE
GREEN, FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1020 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 435.02
Core: 34 Top of Core Depth (m) : 429.50
Sect: 4 Top of Section Depth(m): 434.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1 (3-35), 2A (38-51), 2B (52-86), 2C (85-102);
Texture : PHYRIC, COARSE-GRAINED SUBOPHITIC GROUNDMASS, BASALT
ALONG CURVED FRACTURE SETS IN PCES 1+2B+2C LOCALLY
FINE TO MEDIUM GRAINED;
Structure : FRACTURE SETS IN PCES 1+2B+2C, MASSIVE, VEINS FILLED
BY CALCITE AND GREEN TO BROWN SMEC;
Alteration : SLIGHTLY TO MODERATELY;
Groundmass : GRAY, COARSE-GRAINED, SUBOPHITIC;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): 5-7
PARTIALLY REPLACED ALONG FRACTURES BY CALCITE +
CLAY;
CLINOPYROXENE ( 15%)
Size(mm): <2
PARTIALLY REPLACED ALONG FRACTURES BY GREEN SMEC
+ POSSIBLE FE HYDROXIDES;
OLIVINE ( 1-2%)
Size(mm): <0.5
REPLACED BY GREEN SMEC;
Replacement: CALCITE
PARTIALLY REPLACES GROUNDMASS NEAR CURVED FRACTURE
SETS IN PCES 1+2B+2C, PARTIALLY REPLACES PLAG
PHENOS ALONG FRACTURES, FILLS VEINS;
SMECTITE
GREEN TO BROWN, PARTIALLY REPLACES GROUNDMASS NEAR
CURVED FRACTURE SETS IN PCES 1+2B+2C, FILLS VEINS;
SMECTITE
Minerals Replaced: CPX,OL
GREEN, PARTIALLY REPLACES CPX PHENOS ALONG
FRACTURES, REPLACES OL PHENOS;
FERROUS HYDROX MINS
Minerals Replaced: CPX
PARTIALLY REPLACES CPX PHENOS ALONG FRACTURES;
CLAY
Minerals Replaced: PLAG
PARTIALLY REPLACES PLAG PHENOS ALONG FRACTURES;
SULFIDES
PARTIALLY REPLACES GROUNDMASS NEAR CURVED FRACTURE
SETS IN PCES 1+2B+2C;
Leg : 51 Top/Bottom Interval(mm): 0/1130 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 436.63
Core: 34 Top of Core Depth (m) : 429.50
Sect: 5 Top of Section Depth(m): 435.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
MASSIVE BASALT;
Piece No. : PCE 1A (2-11), 1B (12-15), 1C (15-60), 1D (60-90),
1E (91-113);
Texture : PHYRIC, GLASSY CHILLED MARGIN AT THE BASE OF PCE 1E,
PCE 1E INCREASINGLY FINE-GRAINED TOWARD MARGIN,
MEDIUM TO COARSE GRAINED SUBOPHITIC GROUNDMASS;
OL PHENOS PARTIALLY ALIGNED WITH LONG AXIS
SUBPERPENDICULAR TO CORE AXIS DUE TO POSSIBLE
CRYSTAL SETTLING;
Structure : MASSIVE, VEINS FILLED BY CALCITE AND GREEN SMEC;
Alteration : FRESH TO SLIGHTLY
IN PCE 1E ALTERATION INCREASES TOWARD MARGIN;
Groundmass : OLIVINE
PLAGIOCLASE
CLINOPYROXENE
GRAY WITH MEDIUM TO COARSE-GRAINED SUBOPHITIC;
Phenocrysts: PLAGIOCLASE (15-20%)
OLIVINE
REPLACED BY IDDINGSITE + CALCITE;
Replacement: IDDINGSITE
Minerals Replaced: OL
REPLACES OL PHENOS;
CALCITE
Minerals Replaced: OL
REPLACES OL PHENOS, FILLS VEINS;
SMECTITE
GREEN, FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 1130/1460 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 436.96
Core: 34 Top of Core Depth (m) : 429.50
Sect: 5 Top of Section Depth(m): 436.63
LITHOLOGY: PLAG-OL PHYRIC BASALT;
MINOR PILLOW BRECCIA;
Piece No. : PCE 2 (116-129), 3A (131-141), 3B (141-146);
Texture : PHYRIC BASALT PILLOW WITH GLASSY CHILLED MARGINS IN
PCES 2A + 3B AND MINOR PILLOW BRECCIA IN PCE 3B
CONSISTING OF FRAGMENTS OF BASALT IN A MATRIX OF
GREEN SMEC;
Structure : BASALT PILLOW, VEINS FILLED BY CALCITE + GREEN TO
BROWN SMEC;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE (15-20%)
OLIVINE ( 5-10%)
Replacement: CALCITE
FILLS VEINS;
SMECTITE
GREEN, FOUND AS MATRIX IN BRECCIA, GREEN TO BROWN
FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1450 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 438.45
Core: 34 Top of Core Depth (m) : 429.50
Sect: 6 Top of Section Depth(m): 437.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT WITH INTERPILLOW BRECCIA;
Piece No. : PCE 1A (3-10), 1B (11-20), 1C (20-33), 2 (36-57),
3A (61-67), 3B (67-82), 4 (86-94), 5 (96-117),
6 (120-128), 7A (131-136), 7B (136-145);
Texture : PHYRIC PILLOW BASALT WITH LOCALLY GLASSY CHILLED
MARGINS IN PCES 1B+3B-5+7B AND INTERPILLOW
BRECCIA IN PCES 1A+1B+4+6-7B COMPOSED OF
FRAGMENTS OF BASALT AND ALTERED GLASS IN A MATRIX
OF GREEN SMEC + CALCITE, APHANITIC GROUNDMASS;
Structure : VEINS FILLED BY CALCITE + GREEN SMEC;
Alteration : MOD;
Vesicles :
Location: Filling: CALCITE,SMEC
Groundmass : GRAY WITH AN APHANITIC GROUNDMASS;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <5
ALL PCES EXCEPT 1+2C;
PLAGIOCLASE ( 30%)
Size(mm): <5
LOCALLY IN PCES 1+2C, ALL EUHEDRAL;
OLIVINE ( 5-10%)
Size(mm): 3
EUHEDRAL, REPLACED BY GREEN SMEC;
CLINOPYROXENE ( <3%)
Size(mm): 1
EUHEDRAL TO SUBHEDRAL;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
GREEN, REPLACES OL PHENOS, PARTIALLY REPLACES
GLASS FRAGMENTS, FILLS VESICLES + VEINS, FOUND IN
MATRIX OF BRECCIA;
CALCITE
FILLS VESICLES+VEINS, FOUND IN MATRIX OF BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/1000 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 439.50
Core: 34 Top of Core Depth (m) : 429.50
Sect: 7 Top of Section Depth(m): 438.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
BASALT PILLOWS WITH INTERPILLOW BRECCIA;
Piece No. : PCE 1A (2-16), 1B (17-31), 1C (31-50), 1D (50-55),
2 (57-74), 3A (76-92), 3B (92-100);
Texture : PHYRIC BASALT PILLOWS WITH GLASSY CHILLED MARGINS IN
PCES 1A+1B+1D+2+3B AND TRACES OF INTERPILLOW
BRECCIA, APHANITIC GROUNDMASS;
Structure : BASALT PILLOWS, VEINS FILLED WITH CALCITE;
Alteration : MOD;
Vesicles :
Location: Filling: CALCITE
Groundmass : GRAY WITH AN APHANITIC GROUNDMASS;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <7
OLIVINE ( 10%)
Size(mm): <5
REPLACED BY IDDINGS + GREEN SMEC, OL PHENOS > PLAG
PHENOS NEAR CHILLED MARGINS;
Replacement: IDDINGSITE
Minerals Replaced: OL
SMECTITE
Minerals Replaced: OL
GREEN;
CALCITE
FILLS VEINS + VESICLES;
Leg : 51 Top/Bottom Interval(mm): 0/1400 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 439.20
Core: 35 Top of Core Depth (m) : 437.80
Sect: 1 Top of Section Depth(m): 437.80
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT WITH MINOR INTERPILLOW BRECCIA;
Piece No. : PCE 1A (3-11), 1B (12-21), 1C (21-31), 2 (34-36),
3A (39-51), 3B (51-63), 3C (63-70), 4A (77-93),
4B (93-110), 4C (110-122), 5 (126-140);
Texture : PHYRIC PILLOW BASALT WITH LOCALLY GLASSY CHILLED
MARGINS IN PCES 3A+4C+5 AND MINOR INTERPILLOW
BRECCIA IN PCES 3A+5, APHANITIC TO CRYSTALLINE
GROUNDMASS;
Structure : INTERVAL 40-125CM REPRESENTS A COMPLETE PILLOW,
VEINS FILLED BY CALCITE + GREEN SMEC + ZEOLITES;
Alteration : MOD;
Vesicles :
Location: Filling: CALCITE
Groundmass : GRAY, APHANITIC TO CRYSTALLINE;
Phenocrysts: PLAGIOCLASE (10-20%)
Size(mm): <4
EUHEDRAL;
OLIVINE ( 2-10%)
Size(mm): 3
EUHEDRAL, REPLACED BY GREEN SMEC;
PLAG AND OL PHENOS TEND TO BE MORE ABUNDANT NEAR
THE TOP AND BOTTOM RESPECTIVELY OF INDIVIDUAL
PILLOWS;
CLINOPYROXENE ( <1%)
LOCALLY AS INCLUSIONS IN PLAGIOCLASE;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
REPLACES OL PHENOS + PARTIALLY DEVITRIFIED GLASS
FRAGMENTS, FILLS VEINS, ALL SMEC IS GREEN;
CALCITE
FILLS VESICLES AND VEINS;
ZEOLITE
FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1400 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 440.70
Core: 35 Top of Core Depth (m) : 437.80
Sect: 2 Top of Section Depth(m): 439.30
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH TRACES OF INTERPILLOW BRECCIA;
Piece No. : PCE 1A (1-18), 1B (18-21), 2A (22-40), 2B (40-51),
2C (52-69), 3A (71-87), 4 (89-96), 5 (99-115),
6 (117-121), 7A (123-135), 7B (135-140);
Texture : PHYRIC PILLOW BASALT WITH GLASSY MARGINS IN PCES 1B+
2A+2C+3A+6 AND TRACES OF INTERPILLOW BRECCIA,
GROUNDMASS TEXTURE VARIES FROM APHANITIC NEAR
MARGINS TO INTERSERTAL IN PILLOW INTERIORS;
Structure : INTERVALS 0-21CM + 21-70CM REPRESENT INDIVIDUAL
PILLOWS OR PARTS OF PILLOWS BOUNDED BY CHILL MARGINS
VEINS FILLED BY CALCITE + GREEN SMEC;
Alteration : SLIGHTLY TO MOD;
Comments : BASALT IS GRAY COLOR;
Vesicles : Size(mm): Percent: 1-2
Location: Filling: CALCITE,CELAD
Groundmass : VARIES FROM APHANITIC NEAR MARGINS TO INTERSERTAL
IN PILLOW INTERIORS;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
OLIVINE ( 10%)
Size(mm): <5
REPLACED BY IDDINGSITE + CALCITE;
OL PHENOS TEND TO BE MORE ABUNDANT THAN PLAG NEAR
MARGINS;
Replacement: IDDINGSITE
Minerals Replaced: OL
REPLACES PHENOS;
CELADONITE
FILLS VESICLES;
CALCITE
Minerals Replaced: OL
REPLACES OL PHENOS, FILLS VESICLES + VEINS;
SMECTITE
GREEN, FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1360 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 442.16
Core: 35 Top of Core Depth (m) : 437.80
Sect: 3 Top of Section Depth(m): 440.80
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH TRACES OF INTERPILLOW BRECCIA;
Piece No. : PCE 1A (4-16), 1B (16-35), 1C (35-45), 1D (44-52),
1E (52-70), 2 (72-76), 3A (80-93), 3B (94-105),
3C (105-121), 3D (121-136);
Texture : PHYRIC PILLOW BASALT WITH LOCALLY GLASSY CHILLED
MARGINS IN PCES 1E+3A AND TRACES OF INTERPILLOW
BRECCIA IN PCE 2 CONSISTING OF FRAGMENTS OF BASALT
AND GLASS PARTIALLY REPLACED BY GREEN SMEC IN A
SELF MATRIX OF GREEN SMEC, APHANITIC GROUNDMASS;
Structure : INTERVALS 0-70CM + 80-140CM REPRESENT PARTS OF
INDIVIDUAL PILLOWS BOUNDED BY CHILLED MARGINS, VEINS
FILLED BY CALCITE + GREEN SMEC + ZEOLITES;
Alteration : MOD;
Vesicles : Size(mm): <0.5 Percent: <1
Location: Filling: CALCITE,SMEC
SMEC IS GREEN;
Groundmass : GRAY, APHANITIC;
Phenocrysts: PLAGIOCLASE ( 5-30%)
Size(mm): <6
EUHEDRAL;
OLIVINE ( 1-5%)
Size(mm): <2
LOCALLY 15 PERCENT, REPLACED BY GREEN SMEC;
PHENOS LOCALLY VARIABLE WITH PLAG + OL TENDING TO
CONCENTRATE AT THE TOP AND BOTTOM RESPECTIVELY OF
INDIVIDUAL PILLOWS;
Replacement: ZEOLITE
FILLS VEINS;
CALCITE
FILLS VESICLES + VEINS;
SMECTITE
Minerals Replaced: OL,GLASS
GREEN, FILLS VESICLES + VEINS, REPLACES OL PHENOS,
PARTIALLY REPLACES GLASS IN BRECCIA AND IS FOUND
AS MATRIX IN BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 443.78
Core: 35 Top of Core Depth (m) : 437.80
Sect: 4 Top of Section Depth(m): 442.30
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH HYALOCLASTITE BRECCIA AND MINOR
INTERPILLOW LIMESTONE;
Piece No. : PCE 1 (3-20), 2 (22-28), 3A (31-40), 3B (40-51),
4 (54-59), 5 (61-64), 6A (66-77), 6B (77-92),
6C (92-98), 7 (101-107), 8 (111-115), 9 (118-125),
10 (127-130), 11 (130-136), 12 (138-148);
Texture : PHYRIC PILLOW BASALT WITH GLASSY CHILLED MARGINS IN
PCES 1-3A +4+6A+7+9+11+12 AND INTERPILLOW
HYALOCLASTITE BRECCIA IN PCES 7+9 COMPOSED OF
FRAGMENTS OF BLACK GLASS PARTIALLY ALTERED TO
PALAGONITE IN A MATRIX OF DARK GREEN SMEC AND MINOR
CALCITE, MINOR INTERPILLOW LIMESTONE IN PCES 8+11 IS
FINE-GRAINED AND CONTAINS NUMEROUS SHARDS OF GREEN-
DEVITRIFIED GLASS, GROUNDMASS IS APHANITIC;
Structure : MINOR VEINS FILLED BY CALCITE AND ZEOLITES;
Alteration : MOD;
Comments : % BASALT IS GRAY COLOR;
Vesicles : Size(mm): <1 Percent: 1-2
Location: Filling: ZEOLITES,SMEC
SMEC IS GREEN;
Groundmass : APHANITIC;
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): <5
EUHEDRAL, ALTERED;
OLIVINE ( 5-8%)
Size(mm): <5
REPLACED BY GREEN SMEC + CALCITE;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, FILLS VESICLES, REPLACES OL PHENOS, DARK
GREEN FOUND AS MATRIX IN INTERPILLOW BRECCIA;
ZEOLITE
FILLS VESICLES AND VEINS;
CALCITE
Minerals Replaced: OL
REPLACES OL PHENOS, FILLS VEINS, MINOR AMOUNT
FOUND IN MATRIX OF INTERPILLOW BRECCIA;
PALAGONITE
Minerals Replaced: GLASS
PARTIALLY REPLACES BLACK GLASS FRAGMENTS IN
INTERPILLOW BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 445.28
Core: 35 Top of Core Depth (m) : 437.80
Sect: 5 Top of Section Depth(m): 443.80
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH INTERPILLOW BRECCIA;
Piece No. : PCE 1 (2-14), 2 (16-21), 3 (24-27), 4 (30-36),
5 (39-44), 6 (46-50), 7 (53-58), 8 (61-64),
9 (67-74), 10 (77-80), 11A (83-101), 11B (101-115),
11C (115-123), 12A (126-136), 12B (136-148);
Texture : PHYRIC PILLOW BASALT WITH CHILLED MARGINS IN PCES
1-11A + 11C + 12A AND INTERPILLOW BRECCIA IN PCES
2-10 CONSISTING OF FRAGMENTS OF GLASS ALTERED TO
GREEN SMEC IN A SELF-MATRIX OF GREEN SMEC,
APHANITIC TO CRYSTALLINE GROUNDMASS;
Structure : INTERVALS 82-125CM + 125-150CM REPRESENT INDIVIDUAL
PILLOWS OR PARTS OF PILLOWS BOUNDED BY CHILL MARGINS
VEINS FILLED BY CALCITE + GREEN SMEC;
Alteration : MOD;
Comments : % BASALT IS GRAY COLOR;
Vesicles :
Location: Filling: CALCITE,SMEC
SMEC IS GREEN;
Groundmass : APHANITIC TO CRYSTALLINE;
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): <10
EUHEDRAL;
OLIVINE ( 5%)
Size(mm): <3
EUHEDRAL, REPLACED BY IDDINGS + GREEN SMEC +
CALCITE;
PLAG PHENOS TEND TO BE CONCENTRATED TOWARD TOPS OF
INDIVIDUAL PILLOWS;
Replacement: CALCITE
FILLS VESICLES + VEINS, REPLACES OL PHENOS;
IDDINGSITE
Minerals Replaced: OL
REPLACES OL PHENOS;
SMECTITE
Minerals Replaced: OL,GLASS
GREEN, REPLACES OL PHENOS, FILLS VEINS AND
VESICLES, REPLACES GLASS + FORMS MATRIX IN
BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 446.78
Core: 35 Top of Core Depth (m) : 437.80
Sect: 6 Top of Section Depth(m): 445.30
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH CEMENTED HYALOCLASTITE MARGINS
AND MINOR INTERPILLOW FILLINGS;
Piece No. : PCE 1 (2-16), 2 (19-24), 3 (25-39), 4 (42-51),
5 (54-61), 6A (64-80), 6B (80-94), 7 (96-105),
8 (107-119), 9 (121-128), 10 (130-134),
11 (135-148);
Texture : PHYRIC PILLOW BASALT WITH CEMENTED HYALOCLASTITE
MARGINS IN PCES 1-3 +5+6A+ 8-11 -THESE CHILL MARGINS
ARE ZONED WITH AN OUTER PARTIALLY EXFOLIATED RIM
COMPOSED OF FRAGMENTS OF GLASS (50 PERCENT ALTERED
TO GREEN PALAGONITE IN A MATRIX OF GREEN SMEC
UNDERLAIN BY A 2-3CM WIDE ZONE OF APHANITIC
MODERATELY PHYRIC BASALT), MINOR DARK-GREEN FINE-
GRAINED INTERPILLOW FILLINGS IN PCE 6A, APHANITIC
GROUNDMASS;
Structure : PHYRIC, MINOR VEINS FILLED BY CALCITE + GREEN SMEC;
Alteration : MOD;
Comments : BASALT IS GRAY COLOR;
Vesicles : Size(mm): <1 Percent: 1
Location: Filling: SMEC,CALCITE
SMEC IS GREEN;
Groundmass : APHANITIC;
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): <5
ALTERED, EUHEDRAL;
OLIVINE ( 5%)
Size(mm): <5
EUHEDRAL, REPLACED BY GREEN SMEC + MINOR CALCITE;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, FILLS VESICLES + VEINS,
FOUND AS MATRIX IN HYALOCLASTITE MARGINS;
CALCITE
Minerals Replaced: OL
MINOR AMOUNT REPLACES OL PHENOS, FILLS VESICLES +
VEINS;
PALAGONITE
Minerals Replaced: GLASS
GREEN, REPLACES GLASS IN CHILLED HYALOCLASTITE
MARGIN;
Leg : 51 Top/Bottom Interval(mm): 0/ 710 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 447.51
Core: 35 Top of Core Depth (m) : 437.80
Sect: 7 Top of Section Depth(m): 446.80
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH INTERPILLOW BRECCIA;
Piece No. : PCE 1 (2-12), 2 (22-31), 3 (38-45), 4 (51-57),
5 (62-71);
Texture : PHYRIC PILLOW BASALT WITH CHILLED MARGINS IN PCES
3-5 AND INTERPILLOW BRECCIA IN PCES 3-5 CONSISTING
OF FRAGMENTS OF BASALT AND BASALTIC GLASS ALTERED
TO GREEN SMEC, APHANITIC GROUNDMASS;
Structure : PHYRIC, VEINS FILLED BY CALCITE + GREEN SMEC;
Alteration : MOD;
Comments : BASALT IS GRAY COLOR;
Vesicles :
Location: Filling: CALCITE,SMEC
SMEC IS GREEN;
Groundmass : APHANITIC;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <6
EUHEDRAL;
OLIVINE ( 5%)
Size(mm): <2
EUHEDRAL, REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL, GLASS
GREEN, REPLACES OL PHENOS, FILLS VESICLES + VEINS,
REPLACES BASALT + BASALTIC GLASS IN INTERPILLOW
BRECCIA;
CALCITE
FILLS VESICLES + VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1410 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 446.91
Core: 36 Top of Core Depth (m) : 445.50
Sect: 1 Top of Section Depth(m): 445.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
BASALT PILLOWS;
Piece No. : PCE 1 (1-4), 2A (6-20), 2B (20-33), 2C (33-49),
2D (49-60), 2E (61-63), 3 (65-74), 4 (75-81),
5 (84-86), 6A (88-100), 6B (101-113), 6C (113-126),
6D (126-129), 6E (130-141);
Texture : PHYRIC BASALT PILLOWS WITH CHILLED MARGINS IN PCES
2A + 2E + 3 + 6D + 6E, APHANITIC GROUNDMASS;
Structure : INTERVALS 5-63CM + 63-130CM + 130-145CM REPRESENT
CHILL MARGINS, VEINS FILLED WITH CALCITE + GREEN
SMEC;
Alteration : MOD;
Comments : PCE 1 IS A CHERT PEBBLE PROBABLY FROM SEDIMENTS
ABOVE BASEMENT, BASALT IS A PALE REDDISH-GRAY COLOR,
GLASS IS LARGELY DEVITRIFIED;
Groundmass : APHANITIC;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <4
EUHEDRAL;
OLIVINE ( 5%)
Size(mm): <3
EUHEDRAL, REPLACED BY GREEN SMEC + CALCITE;
CLINOPYROXENE ( 3-5%)
Size(mm): <2
EUHEDRAL TO SUBHEDRAL;
OL + CPX PHENOS TEND TO CONCENTRATE NEAR THE BASE
OF EACH PILLOW;
Replacement: CALCITE
Minerals Replaced: OL
REPLACES OL PHENOS, FILLS VEINS;
SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1350 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 448.35
Core: 36 Top of Core Depth (m) : 445.50
Sect: 2 Top of Section Depth(m): 447.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
BASALT PILLOWS WITH MINOR INTERPILLOW FILLINGS;
Piece No. : PCE 1A (2-16), 1B (16-23), 1C (24-31), 1D (31-46),
1E (46-61), 1F (62-73), 2A (76-88), 2B (89-99),
3A (102-116), 3B (116-135);
Texture : PHYRIC BASALT PILLOWS WITH CEMENTED HYALOCLASTITE
MARGINS IN PCES 2B+3A CONSISTING OF FRAGMENTS OF
BLACK GLASS IN A MATRIX OF DARK GREEN SMEC AND MINOR
DARK GREEN FINE-GRAINED INTERPILLOW FILLINGS IN
PCES 2B+3A, APHANITIC GROUNDMASS;
Alteration : MOD;
Comments : BASALT IS DARK GRAY COLOR;
Vesicles : Size(mm): 1 Percent: 3-4
FILLED WITH CALCITE + ZEOLITES + GREEN SMEC +
MINOR SULFIDES, COALESCED VESICLES FORM CAVITIES
>10MM;
Groundmass : APHANITIC;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <5
EUHEDRAL;
OLIVINE ( 8%)
Size(mm): <8
EUHEDRAL, REPLACED BY GREEN SMEC + POSSIBLE
CELADONITE;
CLINOPYROXENE ( 5%)
Size(mm): <8
AUGITE,ELONGATE, (100) TWINS COMMON;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, FILLS VESICLES, DARK
GREEN FOUND AS A MATRIX IN HYALOCLASTITE MARGINS;
CELADONITE
Minerals Replaced: OL
POSSIBLY REPLACES OL PHENOS;
CALCITE
FILLS VESICLES + VEINS;
ZEOLITE
FILLS VESICLES;
SULFIDES
MINOR, FILLS VESICLES + VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1410 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 449.91
Core: 36 Top of Core Depth (m) : 445.50
Sect: 3 Top of Section Depth(m): 448.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT WITH TRACES OF CALCITE CEMENTED
BRECCIA;
Piece No. : PCE 1 (3-18), 2A (23-32), 2B (32-49), 2C (49-62),
3 (68-77), 4A (80-95), 4B (95-102), 4C (102-111),
5 (116-124), 6 (127-141);
Texture : PHYRIC PILLOW BASALT WITH CHILLED MARGINS IN PCES
1+2A+2C+3+5+6 AND TRACES OF CALCITE CEMENTED
BRECCIA IN PCE 6, APHANITIC GROUNDMASS;
Structure : INTERVALS 0-20CM + 20-65CM + 65-125CM + 125-141CM
REPRESENT INDIVIDUAL PILLOWS OR PARTS OF PILLOWS
BOUNDED BY CHILL MARGINS, VEINS FILLED BY CALCITE +
ZEOLITES + GREEN SMEC + PYRITE;
Alteration : MOD;
Comments : BASALT IS GRAY COLOR, GLASS IS LARGELY DEVITRIFIED
OR ALTERED TO GREEN SMEC;
Vesicles :
Location: Filling: SMEC,CALCITE
SMEC IS GREEN;
Groundmass : APHANITIC;
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): <4
EUHEDRAL;
CLINOPYROXENE ( 5%)
Size(mm): <2
EUHEDRAL;
OLIVINE ( 5%)
Size(mm): <2
EUHEDRAL, REPLACED BY GREEN SMEC, PLAG PHENOS TEND
TO CONCENTRATE NEAR THE TOP OF EACH PILLOW WHILE
OL PHENOS + CPX PHENOS TEND TO CONCENTRATE NEAR
BASE;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
GREEN, REPLACES OL PHENOS, FILLS VESICLES + VEINS,
REPLACES GLASS OR DEVITRIFIED GLASS;
CALCITE
FILLS VESICLES + VEINS;
ZEOLITE
FILLS VEINS;
PYRITE
FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1490 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 451.49
Core: 36 Top of Core Depth (m) : 445.50
Sect: 4 Top of Section Depth(m): 450.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
BASALT PILLOWS;
Piece No. : PCE 1A (2-17), 1B (18-26), 2A (27-41), 2B (41-50),
2C (50-59), 2D (60-69), 2E (65-75), 2F (75-89),
3 (91-99), 4A (101-115), 4B (115-121), 4C (121-129),
5A (132-140), 5B (138-149);
Texture : PHYRIC BASALT PILLOWS WITH FRAGMENTED GLASSY MARGINS
IN PCES 1B+2A+3+4A+4C+5A, CHILLED MARGINS ZONED WITH
AN OUTER PARTIALLY EXFOLIATED RIM COMPOSED OF
FRAGMENTED GLASS UNDERLAIN BY A 2-3CM WIDE ZONE OF
MODERATELY PHYRIC DARK BROWN ALTERED BASALT WITH AN
APHANITIC GROUNDMASS, PILLOW INTERIORS CONTAIN A
MICROLITIC GROUNDMASS;
Structure : INTERVALS 0-25CM + 25-100CM + 100-130CM + 130-150CM
REPRESENT INDIVIDUAL PILLOWS OR PARTS OF PILLOWS
BOUNDED BY CHILLED MARGINS, VEINS FILLED BY GREEN
SMEC AND DISSEMINATED PYRITE;
Alteration : SLIGHTLY;
Comments : PILLOW INTERIORS ARE DARK GRAY COLOR;
Vesicles : Size(mm): 1 Percent: 1-2
Location: Filling: CALCITE OR SMEC
SMEC IS GREEN, SOME ARE ZONED WITH CALCITE
CORES AND LININGS OF GREEN SMEC;
Groundmass : MICROLITIC IN PILLOW INTERIORS;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <6
EUHEDRAL;
OLIVINE ( 4-8%)
Size(mm): <4
EUHEDRAL, REPLACED BY GREEN SMEC + POSSIBLE
CELADONITE;
CLINOPYROXENE ( 1-2%)
Size(mm): 2-3
AUGITE;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, FILLS VESICLES AND
VEINS;
CELADONITE
Minerals Replaced: OL
POSSIBLY REPLACES OL PHENOS;
CALCITE
FILLS VESICLES;
PYRITE
DISSEMINATED, FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/ 600 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 452.10
Core: 36 Top of Core Depth (m) : 445.50
Sect: 5 Top of Section Depth(m): 451.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (4-11), 2A (16-22), 2B (23-30), 2C (30-42),
3A (46-56), 3B (53-60);
Texture : PHYRIC PILLOW BASALT WITH ALTERED SPARSELY PHYRIC
MARGINS IN PCE 2, GLASSY MARGINS DEVITRIFIED ALONG
VEINS, GROUNDMASS RANGES FROM APHANITIC IN PILLOW
MARGINS TO MICROLITIC OR SUBOPHITIC IN PILLOW
INTERIORS;
Structure : INTERVALS 0-23CM + 23-60CM REPRESENT INDIVIDUAL
PILLOWS BOUNDED BY CHILLED MARGINS, VEINS NORMAL TO
PILLOW MARGINS FILLED BY CALCITE;
Alteration : SLIGHTLY TO MOD;
Comments : BASALT IS GRAY COLOR;
Groundmass : RANGES FROM APHANITIC IN PILLOW MARGINS TO
MICROLITIC OR SUBOPHITIC IN PILLOW INTERIORS;
Phenocrysts: PLAGIOCLASE ( 7-20%)
Size(mm): <8
PARTIALLY REPLACED ALONG MARGINS BY CALCITE +
POSSIBLE GREEN SMEC;
CLINOPYROXENE ( 2-7%)
Size(mm): <3
PARTIALLY REPLACED BY GREEN SMEC;
OLIVINE ( 1-3%)
Size(mm): <2
REPLACED BY CALCITE + GREEN SMEC + FE HYDROX;
Replacement: CALCITE
Minerals Replaced: PLAG,OL,GLASS
PARTIALLY REPLACES PLAG PHENOS ALONG MARGINS +
GLASS IN DEVITRIFIED MARGINS,
REPLACES OL PHENOS, FILLS VEINS;
SMECTITE
Minerals Replaced: PLAG,CPX,OL,GLASS
GREEN, PARTIALLY REPLACES PLAG PHENOS ALONG
MARGINS, PARTIALLY REPLACES GLASS IN
DEVITRIFIED MARGINS;
SULFIDES
GROUNDMASS CONTAINS MINOR DISSEMINATED SULFIDES;
FERROUS HYDROX MINS
Minerals Replaced: OL
REPLACES OL PHENOS;
Leg : 51 Top/Bottom Interval(mm): 0/1460 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 452.46
Core: 37 Top of Core Depth (m) : 451.00
Sect: 1 Top of Section Depth(m): 451.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
BASALT PILLOWS WITH MINOR INTERPILLOW BRECCIA AND
MINOR INTERPILLOW SEDIMENTS;
Piece No. : PCE 1 (3-23), 2 (27-31), 3 (35-46), 4 (49-52),
5 (56-65), 6A (68-86), 6B (86-101), 6C (101-117),
6D (115-136), 7 (139-146);
Texture : PHYRIC BASALT PILLOWS WITH CHILLED GLASSY MARGINS IN
PCES 2-6A + 7 WHICH ARE PARTIALLY DEVITRIFIED AND
REPLACED BY GRAY TO GREEN SMEC + CALCITE, MINOR
INTERPILLOW BRECCIA IN PCES 3-5, AND FINE-GRAINED
WEAKLY LAYERED MINOR INTERPILLOW SEDIMENTS IN PCE 5
COMPOSED OF CALCITE + GREEN SMEC WITH ELONGATE
SHARDS OF DARK GREEN DEVITRIFIED GLASS ALIGNED
SUBPARALLEL TO PILLOW MARGINS, GROUNDMASS IS
APHANITIC TO SUBOPHITIC;
Structure : INTERVALS 0-32CM + 70-136CM REPRESENT INDIVIDUAL
PILLOWS OR PARTS OF PILLOWS BOUNDED BY CHILL MARGINS
THIN VEINS FILLED BY CALCITE + BROWN SMEC;
Alteration : MOD;
Comments : BASALT IS GRAY COLOR;
Vesicles : Size(mm): <0.3 Percent: 2
Location: Filling: CALCITE
Groundmass : APHANITIC TO SUBOPHITIC;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <4
PARTIALLY REPLACED BY CALCITE;
CLINOPYROXENE ( 7%)
Size(mm): <3
AUGITE;
OLIVINE ( <1%)
Size(mm): <2
REPLACED BY GREEN SMEC;
Replacement: CALCITE
Minerals Replaced: PLAG
DISSEMINATED TRACES FOUND IN GROUNDMASS, PARTIALLY
REPLACES PLAG PHENOS, FILLS VESICLES + VEINS,
REPLACES PARTIALLY DEVITRIFIED GLASSY MARGINS,
FOUND IN INTERPILLOW SEDIMENTS;
SMECTITE
Minerals Replaced: OL
REPLACES OL PHENOS, FOUND IN INTERPILLOW
SEDIMENTS, GRAY TO GREEN REPLACES PARTIALLY
DEVITRIFIED GLASSY MARGINS, BROWN FILLS THIN
VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 453.97
Core: 37 Top of Core Depth (m) : 451.00
Sect: 2 Top of Section Depth(m): 452.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-26), 1B (25-38), 1C (38-43), 1D (40-54),
1E (54-68), 1F (67-85), 1G (82-94), 1H (91-100),
1I (101-110), 1J (111-123), 2 (126-128),
3 (131-147);
Texture : PHYRIC PILLOW BASALT WITH CHILLED GLASSY MARGINS IN
PCES 1B-1D +1I+1J+3, APHANITIC TO MICROLITIC
GROUNDMASS;
Structure : INTERVALS 0-40CM + 40-110CM + 110-125CM +130-150CM
REPRESENT INDIVIDUAL PILLOWS OR PARTS OF PILLOWS
BOUNDED BY CHILLED MARGINS, VEINS FILLED BY CELAD
AND OR CALCITE;
Alteration : FRESH TO MOD;
Comments : BASALT IS GRAY COLOR;
Vesicles : Size(mm): Percent: 1-2
Location: Filling: CALC,SMEC,CELAD
FILLED BY CALCITE + GREEN SMEC AND-OR
CELADONITE;
Groundmass : APHANITIC TO MICROLITIC;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <7
CLINOPYROXENE ( 5%)
Size(mm): <5
AUGITE;
OLIVINE ( 5%)
Size(mm): <7
REPLACED BY IDDINGS + CALCITE;
Replacement: CALCITE
Minerals Replaced: OL
REPLACES OL PHENOS, FILLS VESICLES + VEINS;
IDDINGSITE
Minerals Replaced: OL
REPLACES OL PHENOS;
SMECTITE
GREEN, FILLS VESICLES;
CELADONITE
FILLS VESICLES + VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1220 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 455.22
Core: 37 Top of Core Depth (m) : 451.00
Sect: 3 Top of Section Depth(m): 454.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT WITH MINOR INTERPILLOW LIMESTONE;
Piece No. : PCE 1A (2-11), 1B (11-21), 1C (20-28), 2 (33-37),
3A (40-60), 3B (61-71), 4A (73-82), 4B (78-82),
4C (82-96), 4D (93-110), 5 (115-122);
Texture : PHYRIC PILLOW BASALT WITH CHILLED GLASSY MARGINS IN
PCES 1B+1C+3+4 THAT ARE PARTIALLY DEVITRIFIED AND
PARTIALLY REPLACED BY GREEN SMEC + CALCITE, MINOR
FINE-GRAINED LAYERED INTERPILLOW LIMESTONE IN PCES
2+5 LIGHT TO DARK-GREEN OR BLUE-GREEN COMPOSED OF
CALCITE AND GREEN SMEC WITH SHARDS OF ALTERED GLASS,
APHANITIC TO MICROLITIC TO SUBOPHITIC GROUNDMASS;
Structure : INTERVALS 0-30CM + 40-72CM + 72-82CM + 82-110CM
REPRESENT INDIVIDUAL PILLOWS OR PARTS OF PILLOWS
BOUNDED BY CHILL MARGINS, VEINS FILLED BY CALCITE +
BROWN SMEC;
Alteration : MOD;
Comments : BASALT IS GRAY COLOR;
Vesicles : Size(mm): Percent: RARE
Location: Filling: CALCITE
Groundmass : APHANITIC TO MICROLITIC TO SUBOPHITIC;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <9
WEAKLY ALTERED;
CLINOPYROXENE ( 1-2%)
Size(mm): <2
AUGITE, WEAKLY ALTERED;
OLIVINE ( <1%)
Size(mm): <2
REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, FOUND IN INTERPILLOW
LIMESTONE, PARTLY REPLACES PARTIALLY DEVITRIFIED
GLASSY MARGINS, BROWN FILLS VEINS;
CALCITE
FILLS VEINS + VESICLES, FOUND IN INTERPILLOW
LIMESTONE, PARTIALLY REPLACES PARTIALLY
DEVITRIFIED GLASSY MARGINS;
Leg : 51 Top/Bottom Interval(mm): 0/1450 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 456.95
Core: 37 Top of Core Depth (m) : 451.00
Sect: 4 Top of Section Depth(m): 455.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT WITH TRACES OF INTERPILLOW LIMESTONE;
Piece No. : PCE 1 (2-28), 2 (33-36), 3 (39-50), 4 (52-67),
5 (71-76), 6A (78-84), 6B (84-89), 6C (88-106),
6D (106-112), 6E (113-122), 7 (125-145);
Texture : PHYRIC PILLOW BASALT WITH NEARLY APHYRIC CHILLED
GLASSY MARGINS IN PCES 1-7 THAT ARE PARTIALLY
DEVITRIFIED AND REPLACED BY GREEN SMEC + CALCITE
TRACES OF FINE-GRAINED INTERPILLOW LIMESTONE IN PCE
1 CONSISTING OF CALCITE + GREEN SMEC, GROUNDMASS IS
APHANITIC TO HYALOPILITC IN PCES 1-6C AND APHANITIC
TO SUBOPHITIC IN PCES 6D-7;
Structure : MINOR VEINS FILLED BY CALCITE;
Alteration : MOD;
Comments : BASALT IS GRAY COLOR;
Groundmass : APHANITIC TO HYALOPILITIC IN PCES 1-6C, APHANITIC
TO SUBOPHITIC IN PCES 6D-7;
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): <0.8
NEAR MARGINS;
( 15%)
Size(mm): <5
IN PILLOW INTERIORS, SIZE AND AMOUNT VARY BETWEEN
MARGINS AND PILLOW INTERIORS;
OLIVINE ( 1%)
Size(mm): <1
ABSENT NEAR MARGINS INCREASING TO ABOVE AMOUNT IN
PILLOW INTERIORS;
CLINOPYROXENE ( 5-7%)
Size(mm): <2
AUGITE;
CLINOPYROXENE ( 10%)
Size(mm): <5
PCE 1;
OLIVINE ( 1-2%)
Size(mm): <3
PCE 1;
PLAGIOCLASE ( 2%)
Size(mm): <3
PCE 1,
PCE 1 ANOMALOUSLY RICH IN AUGITE + OL AND POOR IN
PLAG;
Replacement: CALCITE
FILLS VEINS, FOUND IN INTERPILLOW LIMESTONE,
REPLACES PARTLY DEVITRIFIED GLASSY MARGINS;
SMECTITE
Minerals Replaced: PLAG,OL,CPX
GREEN, PARTLY TO COMPLETELY REPLACES PLAG + OL +
CPX PHENOS, REPLACES PARTIALLY DEVITRIFIED GLASSY
MARGINS, FOUND IN INTERPILLOW LIMESTONE;
Leg : 51 Top/Bottom Interval(mm): 0/1440 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 458.44
Core: 37 Top of Core Depth (m) : 451.00
Sect: 5 Top of Section Depth(m): 457.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (4-13), 2 (18-31), 3 (36-46), 4 (50-59),
5 (63-71), 6 (74-93), 7A (99-115), 7B (114-122),
7C (120-126), 8A (129-137), 8B (138-144);
Texture : PHYRIC PILLOW BASALT WITH GLASSY CHILLED MARGINS IN
PCES 1+ 4-6 + 7C-8B, CHILLED MARGINS IN PCE 6 ARE
SPARSELY PHYRIC LOCALLY DEVITRIFIED REPLACED BY
GREEN SMEC + CALCITE, GROUNDMASS IS APHANITIC TO
MICROLITIC;
Structure : INTERVALS 73-127CM + 127-145CM REPRESENT INDIVIDUAL
PILLOWS BOUNDED BY CHILL MARGINS, VEINS FILLED BY
CALCITE;
Alteration : FRESH TO MOD;
Comments : BASALT IS GRAY COLOR;
Groundmass : APHANITIC TO MICROLITIC;
Phenocrysts: PLAGIOCLASE ( <25%)
Size(mm): <8
LOCALLY <20CM IN PCE 1;
CLINOPYROXENE ( 5%)
Size(mm): <2
REPLACED BY GREEN SMEC;
OLIVINE ( 1-2%)
Size(mm): <2
REPLACED BY GREEN SMEC;
PCE 7 ANOMALOUSLY RICH IN AUGITE PHENOS 10 PERCENT
<3MM IN SIZE;
Replacement: SMECTITE
Minerals Replaced: CPX,OL
GREEN, REPLACES CPX + OL PHENOS, REPLACES LOCALLY
DEVITRIFIED CHILL MARGINS;
CALCITE
FILLS VEINS, REPLACES LOCALLY DEVITRIFIED CHILL
MARGINS;
Leg : 51 Top/Bottom Interval(mm): 0/1370 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 459.87
Core: 37 Top of Core Depth (m) : 451.00
Sect: 6 Top of Section Depth(m): 458.50
LITHOLOGY: PLAG-CPX-OL PHYRIC TO MOD PHYRIC BASALT;
PILLOW BASALT WITH TRACES OF INTERPILLOW LIMESTONE;
Piece No. : PCE 1 (2-17), 2 (21-34), 3 (37-53), 4 (54-76),
5 (81-94), 6A (99-119), 6B (118-126), 7 (131-137);
Texture : PHYRIC TO MOD PHYRIC PILLOW BASALT WITH GLASSY
CHILLED MARGINS IN PCES 3+5+6A+7 AND TRACES OF
INTERPILLOW LIMESTONE IN PCES 6A, APHANITIC TO
MICROLITIC - LOCALLY SUBOPHITIC GROUNDMASS;
Structure : VEINS FILLED BY GREEN SMEC + CALCITE + PYRITE;
Alteration : FRESH TO MOD;
Comments : BASALT IS GRAY COLOR;
Vesicles : Size(mm): 0.3 Percent: 3
Location: Filling: CALC,SMEC,CLAY
LOCALLY COALESCED TO FORM LARGE VUGS IN PCES 4+6A,
FILLED WITH CALCITE + GREEN SMEC + WHITE CLAY;
Groundmass : APHPANITIC TO MICROLITIC - LOCALLY SUBOPHITIC;
Phenocrysts: PLAGIOCLASE ( 3-15%)
Size(mm): 1-5
QUANTITY RANGES FROM NEARLY ABSENT IN CHILLED
MARGIN OF PCE 3 TO QUITE ABUNDANT IN PCES THAT
CONTAIN SUBOPHITIC GROUNDMASS LIKE PCES 1+2+5+7;
CLINOPYROXENE ( 3-5%)
Size(mm): 2-3
LOCALLY <7MM IN PCE 1, REPLACED BY GREEN SMEC,
PCE 5 ANOMALOUSLY RICH 7-10 PERCENT 2-3MM;
OLIVINE ( 1%)
Size(mm): 2-3
REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: CPX,OL
GREEN, REPLACES CPX + OL PHENOS, FILLS VESICLES +
VEINS;
CALCITE
FILLS VESICLES + VEINS;
CLAY
WHITE, FILLS VESICLES;
PYRITE
FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/ 380 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 460.38
Core: 37 Top of Core Depth (m) : 451.00
Sect: 7 Top of Section Depth(m): 460.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (3-17), 2 (20-28), 3 (30-38);
Texture : PHYRIC PILLOW BASALT WITH GLASSY CHILLED MARGINS IN
PCE 1+2, APHANITIC TO MICROLITIC GROUNDMASS;
Structure : VEINS COMMON NEAR MARGIN FILLED BY CALCITE + GREEN
SMEC + POSSIBLE CELADONITE;
Alteration : MOD;
Comments : BASALT IS GRAY COLOR;
Groundmass : APHANITIC TO MICROLITIC;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <10
OLIVINE ( 5-7%)
Size(mm): <1
ALTERED TO IDDINGS;
CLINOPYROXENE ( 3-5%)
Size(mm): <3
Replacement: IDDINGSITE
Minerals Replaced: OL
CALCITE
FILLS VEINS;
SMECTITE
GREEN, FILLS VEINS;
CELADONITE
POSSIBLY FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1500 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 459.80
Core: 38 Top of Core Depth (m) : 458.30
Sect: 1 Top of Section Depth(m): 458.30
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT WITH MINOR INTERPILLOW HYALOCLASTITE
BRECCIA;
Piece No. : PCE 1 (3-13), 2 (19-22), 3 (26-34), 4 (36-49),
5 (52-54), 6 (56-63), 7A (64-75), 7B (76-83),
7C (81-84), 7D (84-88), 7E (88-93), 7F (93-99),
8 (102-108), 9A (110-115), 9B (116-125),
9C (126-138), 9D (138-150);
Texture : PHYRIC PILLOW BASALT WITH GLASSY CHILLED MARGINS
IN PCES 1+ 3-9A AND MINOR INTERPILLOW HYALOCLASTITE
BRECCIA IN PCES 1+6+8 CONSISTING OF FRAGMENTS OF
BASALT AND DEVITRIFIED GLASS PARTIALLY REPLACED BY
PALAGONITE + GREEN SMEC + CALCITE IN A MATRIX OF
CALCITE + GREEN SMEC, GROUNDMASS IS APHANITIC TO
VARIOLITIC ALONG PILLOW MARGINS AND MICROLITIC IN
PILLOW INTERIORS;
Structure : VEINS FILLED BY CALCITE + PYRITE + GREEN SMEC;
Alteration : SLIGHTLY TO MOD;
Comments : BASALT IS GRAY COLOR;
Groundmass : APHANITIC TO VARIOLITIC ALONG PILLOW MARGINS AND
MICROLITIC IN PILLOW INTERIORS;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <4
CLINOPYROXENE ( 5-10%)
Size(mm): 1-2
AUGITE;
OLIVINE ( 5%)
Size(mm): 1-2
REPLACED BY GREEN SMEC + CALCITE;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
GREEN, REPLACES OL PHENOS + GLASS IN BRECCIA,
FILLS VEINS;
CALCITE
Minerals Replaced: OL,GLASS
REPLACES OL PHENOS + GLASS IN BRECCIA, FILLS VEIN;
PYRITE
FILLS VEINS;
PALAGONITE
Minerals Replaced: GLASS
REPLACES GLASS IN BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 461.28
Core: 38 Top of Core Depth (m) : 458.30
Sect: 2 Top of Section Depth(m): 459.80
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT WITH MINOR INTERPILLOW LIMESTONE;
Piece No. : PCE 1 (2-5), 2 (8-21), 3 (25-27), 4 (30-34),
5 (37-50), 6 (53-56), 7A (59-69), 7B (69-78),
8A (81-96), 8B (96-111), 8C (112-130), 8D (131-141),
8E (141-148);
Texture : PHYRIC PILLOW BASALT WITH APHYRIC GLASSY CHILLED
MARGINS IN PCES 1-6 +8A+8E THAT ARE PARTIALLY
DEVITRIFIED AND REPLACED BY GREEN SMEC + CALCITE AND
MINOR INTERPILLOW LIMESTONE IN PCES 7A+7B THAT IS
CRUDELY LAYERED WITH A BROWN UPPER LAYER COMPOSED OF
FRAGMENTS OF DEVITRIFIED GLASS ALTERED TO GREEN SMEC
IN A MATRIX OF CALCITE AND BROWN TO GREEN SMEC
UNDERLAIN BY A 2-3CM THICK LAYER OF CALCITE AND
DARK GREEN SMEC, APHANITIC GROUNDMASS ALONG PILLOW
MARGINS AND A MICROLITIC TO SUBOPHITIC GROUNDMASS IN
PILLOW INTERIORS;
Structure : VEINS FILLED BY GREEN SMEC + CALCITE;
Alteration : FRESH TO MOD;
Comments : BASALT IS GRAY COLOR;
Vesicles : Size(mm): <2 Percent: <3
Location: Filling: CALCITE,SMEC
SMEC IS GREEN;
Groundmass : APHANITIC ALONG PILLOW MARGINS AND MICROLITIC TO
SUBOPHITIC IN PILLOW INTERIORS;
Phenocrysts: PLAGIOCLASE ( 1-15%)
Size(mm): <5
CLINOPYROXENE ( 2-10%)
Size(mm): <3
REPLACED BY GREEN SMEC;
OLIVINE ( <1%)
Size(mm): <0.5
REPLACED BY GREEN SMEC;
PHENOS VARIABLE FROM PILLOW MARGINS TO INTERIORS
AND FROM PILLOW TO PILLOW WITH MARGINS TENDING TO
BE APHYRIC OR RICH IN CPX AND INTERIORS RICH IN
PLAG;
Replacement: SMECTITE
Minerals Replaced: CPX,OL
GREEN, REPLACES CPX + OL PHENOS, FILLS VESICLES +
VEINS, REPLACES GLASSY MARGINS + GLASS IN
INTERPILLOW LIMESTONE, DARK GREEN FOUND IN
LIMESTONE, BROWN TO GREEN FOUND AS MATRIX IN
LIMESTONE;
CALCITE
FILLS VESICLES AND VEINS, REPLACES GLASSY MARGINS,
FOUND AS MATRIX IN LIMESTONE;
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 462.77
Core: 38 Top of Core Depth (m) : 458.30
Sect: 3 Top of Section Depth(m): 461.30
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT WITH PALAGONITE BRECCIA;
Piece No. : PCE 1A (4-16), 1B (16-22), 1C (22-34), 1D (34-40),
2 (44-49), 3 (52-54), 4A (57-71), 4B (71-84),
5 (86-88), 6 (90-101), 7 (103-121), 8A (124-133),
8B (133-147);
Texture : PHYRIC PILLOW BASALT WITH ALTERED MARGINS IN PCES
1-6 + 8A LARGELY REPLACED BY DARK GREEN SMEC +
PALAGONITE + CALCITE, PALAGONITE BRECCIA IN PCES 1-6
+8A COMPOSED OF STRONGLY ALTERED PILLOW MARGIN
FRAGMENTS IN A LOCALLY COLLIFORM MATRIX OF CALCITE +
GREEN SMEC, APHANITIC TO MICROLITIC GROUNDMASS;
Alteration : FRESH TO MOD;
Comments : BASALT IS GRAY COLOR;
Groundmass : APHANITIC TO MICROLITIC;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <10
CLINOPYROXENE ( 5-10%)
Size(mm): <5
OLIVINE ( 1-2%)
LOCALLY TO 5 PERCENT, REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
GREEN, REPLACES OL PHENOS, FOUND AS MATRIX IN
BRECCIA, DARK GREEN REPLACES GLASS;
CALCITE
Minerals Replaced: GLASS
REPLACES GLASS, FOUND AS MATRIX IN BRECCIA;
PALAGONITE
Minerals Replaced: GLASS
Leg : 51 Top/Bottom Interval(mm): 0/1420 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 464.22
Core: 38 Top of Core Depth (m) : 458.30
Sect: 4 Top of Section Depth(m): 462.80
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-12), 1B (13-21), 2A (26-39), 2B (40-53),
3 (56-63), 4A (66-80), 4B (80-93), 5A (97-111),
5B (111-126), 6 (130-142);
Texture : PHYRIC PILLOW BASALT WITH PARTIALLY ALTERED GLASSY
MARGINS IN PCES 3+4A+6, GLASS PARTIALLY DEVITRIFIED
REPLACED BY GREEN SMEC, APHANITIC TO CRYSTALLINE
GROUNDMASS;
Structure : INTERVALS 0-65CM + 65-140CM REPRESENT INDIVIDUAL
PILLOWS OR PARTS OF PILLOWS BOUNDED BY CHILLED
MARGINS, VEINS FILLED BY CALCITE + GREEN SMEC +
ZEOLITES;
Alteration : MOD;
Comments : BASALT IS GRAY COLOR;
Groundmass : APHANITIC TO CRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <7
EUHEDRAL TO SUBHEDRAL;
CLINOPYROXENE ( 5%)
Size(mm): 3
SUBHEDRAL;
OLIVINE ( 2%)
Size(mm): 2
ANHEDRAL, REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: GLASS,OL
GREEN, REPLACES DEVITRIFIED GLASS, REPLACES OL
PHENOS, FILLS VEINS;
CALCITE
FILLS VEINS;
ZEOLITE
FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 465.77
Core: 38 Top of Core Depth (m) : 458.30
Sect: 5 Top of Section Depth(m): 464.30
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
% PILLOW BASALT WITH HYALOCLASTITE BRECCIA;
Piece No. : PCE 1 (2-9), 2 (11-19), 3 (23-29), 4 (32-48),
5 (50-58), 6 (61-66), 7 (68-74), 8 (76-82),
9 (86-94), 10A (95-100), 11 (109-121), 12 (124-139),
13 (140-147);
Texture : PHYRIC PILLOW BASALT WITH CHILLED MARGINS IN PCES 5+
8+9+10, GLASS IS DEVITRIFIED REPLACED BY GREEN SMEC
+ CALCITE, ALTERED HYALOCLASTITE BRECCIA IN PCES
1-10A COMPOSED OF ANGULAR CLASTS OF ALTERED BASALT
+ DEVITRIFIED GLASS + PALAGONITE IN A MATRIX OF DARK
GREEN SMEC + CALCITE, APHANITIC TO MICROLITIC
GROUNDMASS;
Structure : VEINS FILLED BY GREEN SMEC;
Alteration : MOD;
Comments : BASALT IS GRAY COLOR;
Groundmass : APHANITIC TO MICROLITIC;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <8
OLIVINE ( 5%)
Size(mm): <2
REPLACED BY GREEN SMEC;
CLINOPYROXENE ( 5%)
Size(mm): <2
AUGITE;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
GREEN, REPLACES OL PHENOS, REPLACES DEVITRIFIED
GLASS, FOUND AS MATRIX IN BRECCIA, FILLS VEINS;
CALCITE
Minerals Replaced: GLASS
REPLACES DEVITRIFIED GLASS, FOUND AS MATRIX IN
BRECCIA;
PALAGONITE
FOUND IN BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/ 750 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 466.55
Core: 38 Top of Core Depth (m) : 458.30
Sect: 6 Top of Section Depth(m): 465.80
LITHOLOGY: PLAG-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (3-16), 1B (16-30), 2A (33-45), 2B (45-56),
3 (62-75);
Texture : PHYRIC PILLOW BASALT WITH AN ALTERED MARGIN AT THE
BASE OF PCE 3, APHANITIC TO CRYSTALLINE GROUNDMASS;
Structure : INTERVAL 0-75CM REPRESENTS PART OF AN INDIVIDUAL
PILLOW BOUNDED BY CHILLED MARGINS, VEINS FILLED BY
CALCITE + GREEN SMEC;
Alteration : MOD;
Vesicles :
Location: Filling: ZEOL,SMEC,CALCITE
GREEN SMECTITE;
Groundmass : APHANITIC TO CRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <6
EUHEDRAL;
CLINOPYROXENE ( 10%)
Size(mm): <5
EUHEDRAL, PHENOS TEND TO BE CONCENTRATED NEAR
MARGIN IN PCE 3 AND ADJACENT TO INTERNAL APHYRIC
ZONE IN PCE 2B;
Replacement: ZEOLITE
FILLS VESICLES;
SMECTITE
GREEN, FILLS VESICLES + VEINS;
CALCITE
FILLS VESICLES + VEINS;
BASALT IS GRAY COLOR;
Leg : 51 Top/Bottom Interval(mm): 0/1450 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 466.15
Core: 39 Top of Core Depth (m) : 464.70
Sect: 1 Top of Section Depth(m): 464.70
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALTIC BRECCIA;
Piece No. : PCE 1 (3-6), 2 (9-20), 3 (22-25), 4A (27-31),
4B (31-37), 4C (37-41), 5A (44-56), 5B (57-61),
6 (63-68), 7 (71-78), 8A (80-88), 8B (89-101),
8C (102-109), 9A (111-119), 9B (120-123),
10A (128-138), 10B (135-145);
Texture : VOLCANIC BRECCIA COMPOSED OF PILLOW BASALT FRAGMENTS
OFTEN WITH GLASSY CHILLED MARGINS OR WITH
DEVITRIFIED MARGINS PARTIALLY REPLACED BY GREEN
SMEC IN A MATRIX OF CALCITE + GREEN SMEC +
DEVITRIFIED GLASS - REPLACED BY CALCITE + GREEN
SMEC, APHANITIC TO MICROLITIC GROUNDMASS;
Structure : VEINS FILLED BY GREEN SMEC;
Alteration : MOD;
Comments : BASALT IS GRAY COLOR;
Groundmass : APHANITIC TO MICROLITIC;
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): <3
FRESH TO WEAKLY ALTERED;
CLINOPYROXENE ( 2-3%)
Size(mm): <2
AUGITE, PARTLY REPLACED BY GREEN SMEC;
OLIVINE ( <1%)
Size(mm): <1
COMPLETELY REPLACED BY GREEN SMEC + CALCITE;
Replacement: SMECTITE
Minerals Replaced: GLASS,OL,CPX
GREEN, PARTLY REPLACES DEVITRIFIED MARGINS, FOUND
AS MATRIX AND REPLACES DEVITRIFIED GLASS IN
BRECCIA, PARTLY REPLACES CPX PHENOS, COMPLETELY
REPLACES OL PHENOS, FILLS VEINS;
CALCITE
Minerals Replaced: GLASS,OL
FOUND AS MATRIX AND REPLACES DEVITRIFIED GLASS IN
BRECCIA, COMPLETELY REPLACES OL PHENOS;
Leg : 51 Top/Bottom Interval(mm): 0/ 220 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 466.42
Core: 39 Top of Core Depth (m) : 464.70
Sect: 2 Top of Section Depth(m): 466.20
LITHOLOGY: BASALT BRECCIA;
Piece No. : PCE 1A (2-7), 1B (8-14), 1C (14-22);
Texture : VOLCANIC BRECCIA COMPOSED OF FRAGMENTS OF BASALT
WITH CHILLED TO GLASSY MARGINS IN A MATRIX OF
CALCITE + GREEN SMEC + DEVITRIFIED GLASS;
Alteration : MOD;
Replacement: CALCITE
FOUND IN MATRIX OF BRECCIA;
SMECTITE
GREEN, FOUND IN MATRIX OF BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 220/ 950 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 467.15
Core: 39 Top of Core Depth (m) : 464.70
Sect: 2 Top of Section Depth(m): 466.42
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCE 1C (22-32), 1D (33-42), 2A (45-53), 2B (53-65),
2C (64-70), 2D (69-82), 2E (82-87), 2F (88-92),
2G (89-95);
Texture : PHYRIC BASALT WITH GLASSY CHILLED MARGINS IN PCES
2A + 2C-F PARTIALLY REPLACED BY GREEN SMEC +
CALCITE, APHANITIC TO MICROLITIC GROUNDMASS;
Structure : VEINS FILLED WITH GREEN SMEC;
Alteration : MOD;
Comments : BASALT IS GRAY COLOR;
Vesicles : PCE 1C CONTAINS A LARGE CALCITE FILLED VUG WITH A
LINING OF DARK GREEN SMEC;
Groundmass : APHANITIC TO MICROLITIC;
Phenocrysts: PLAGIOCLASE ( <10%)
Size(mm): <9
CLINOPYROXENE ( <7%)
Size(mm): <2
AUGITE, PARTLY REPLACED BY GREEN SMEC + CALCITE,
COMMON ALONG PILLOW MARGINS;
OLIVINE ( <1%)
Size(mm): <2
COMPLETELY REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: CPX,OL
GREEN, PARTLY REPLACES CPX PHENOS, REPLACES OL
PHENOS, FILLS VEINS, DARK GREEN LINES LARGE
CALCITE VUG IN PCE 1C, PARTIALLY REPLACES GLASSY
CHILLED MARGINS;
CALCITE
Minerals Replaced: CPX
PARTLY REPLACES CPX PHENOS, FILLS LARGE VUG IN
PCE 1C, PARTIALLY REPLACES GLASSY CHILLED MARGINS;
Leg : 51 Top/Bottom Interval(mm): 950/1460 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 467.66
Core: 39 Top of Core Depth (m) : 464.70
Sect: 2 Top of Section Depth(m): 467.15
LITHOLOGY: APHYRIC TO CPX SPARSELY PHYRIC BASALT;
Piece No. : PCE 2G (95-105), 2H (102-114), 2I (114-125),
2J (126-146);
Texture : APHYRIC TO SPARSELY PHYRIC BASALT WITH APHANITIC
GROUNDMASS CONTAINING MICROPHENOS OF CPX;
Structure : VEINS FILLED WITH CALCITE OR GREEN TO BROWN SMEC;
Alteration : MOD TO FRESH;
Comments : BASALT IS GRAY COLOR;
Vesicles : Size(mm): <0.3 Percent: 2
Location: Filling: CALCITE,SMEC
SMEC IS GREEN, FILLINGS ALTERNATE WITH DEPTH,
PCE 2J CONTAINS A SHARP STEEPLY INCLINED
TRANSITION DIP EQUAL TO 60 DEGREES BETWEEN A ZONE
OF CALCITE VESICLE FILLINGS AND AN UNDERLYING ZONE
WITH GREEN SMEC FILLINGS;
Groundmass : APHANITIC;
Phenocrysts: CLINOPYROXENE
MICROPHENOS;
Replacement: SMECTITE
GREEN, FILLS VESICLES, GREEN TO BROWN FILLS VEINS;
CALCITE
FILLS VESICLES + VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 469.18
Core: 39 Top of Core Depth (m) : 464.70
Sect: 3 Top of Section Depth(m): 467.70
LITHOLOGY: APHYRIC TO PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCE 1A (0-20), 1B (8-37), 1C (38-46), 1D (47-55),
2A (57-80), 2B (80-105), 3A (107-109), 3B (110-114),
4 (116-124), 5 (126-133), 6 (135-140), 7 (142-148);
Texture : APHYRIC TO PHYRIC BASALT WITH MINOR VOLCANIC BRECCIA
IN PCES 3A-7 COMPOSED OF FRAGMENTS OF PILLOW BASALT
WITH HYALOCLASTITE MARGINS AND SHARDS OF GLASS
PARTIALLY REPLACED BY PALAGONITE + GREEN SMEC +
CALCITE IN A MATRIX OF GREEN SMEC + CALCITE;
MICROLITIC GROUNDMASS;
Alteration : MOD;
Comments : BASALT IS GRAY COLOR;
Vesicles : Size(mm): <1 Percent:
Location: Filling: CALCITE,SMEC
INTERVAL 0-25CM DISPLAYS A SHARP STEEPLY INCLINED
TRANSITION PARALLEL TO A MAJOR CRACK BETWEEN A
ZONE OF GREEN SMEC FILLINGS AND AN UNDERLYING
ZONE WITH CALCITE FILLINGS, INTERVAL 45-95CM
CONTAINS ONLY CALCITE FILLED VESICLES;
Groundmass : MICROLITIC;
Phenocrysts: PLAGIOCLASE ( <10%)
Size(mm): <4
INTERVALS 25-45CM + 95-105CM;
COMBINATION ( <10%)
Size(mm): <4
OL + CPX, INTERVALS 25-45CM + 95-105CM, OL PHENOS
REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
GREEN, REPLACES OL PHENOS, FILLS VESICLES, FOUND
IN MATRIX AND PARTIALLY REPLACES GLASS IN BRECCIA;
CALCITE
Minerals Replaced: GLASS
FILLS VESICLES, FOUND AS MATRIX AND PARTIALLY
REPLACES GLASS IN BRECCIA;
PALAGONITE
PARTIALLY REPLACES GLASS IN BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/1000 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 470.20
Core: 39 Top of Core Depth (m) : 464.70
Sect: 4 Top of Section Depth(m): 469.20
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT WITH TRACES OF INTERPILLOW BRECCIA;
Piece No. : PCE 1A (3-11), 1B (11-41), 1C (42-51), 2 (55-73),
3A (76-100);
Texture : PHYRIC PILLOW BASALT WITH CHILLED MARGINS IN PCES
1A+1C+2+3 AND TRACES OF INTERPILLOW BRECCIA IN PCE
1A, APHANITIC TO MICROLITIC OR LOCALLY SUBOPHITIC
BASALT;
Structure : INTERVALS 0-53CM + 53-75CM + 75-100CM REPRESENT
INDIVIDUAL PILLOWS OR PARTS OF PILLOWS BOUNDED BY
CHILLED MARGINS, VEINS FILLED BY CALCITE AND DARK
GREEN SMEC;
Alteration : MOD;
Comments : BASALT IS GRAY COLOR;
Vesicles : Size(mm): <0.2 Percent: 1
LOCALLY COALESCED TO FORM VUGS <7MM FILLED BY
CALCITE;
Groundmass : APHANITIC TO MICROLITIC OR LOCALLY SUBOPHITIC;
Phenocrysts: PLAGIOCLASE ( 3-20%)
Size(mm): <6
CLINOPYROXENE ( 2-7%)
Size(mm): <2
PARTIALLY REPLACED BY GREEN SMEC + CALCITE,
COMMON ALONG PILLOW MARGINS;
OLIVINE ( 1%)
Size(mm): <2
REPLACED BY GREEN SMEC + CALCITE;
Replacement: SMECTITE
Minerals Replaced: CPX,OL
REPLACES OL AND PARTIALLY REPLACES CPX PHENOS,
DARK GREEN FILLS VEINS;
CALCITE
Minerals Replaced: CPX,OL
PARTIALLY REPLACES CPX AND REPLACES OL PHENOS,
FILLS VESICLES + VUGS + VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1210 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 471.91
Core: 39 Top of Core Depth (m) : 464.70
Sect: 5 Top of Section Depth(m): 470.70
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT WITH TRACES OF INTERPILLOW BRECCIA;
Piece No. : PCE 1A (3-51), 1B (51-81), 1C (81-88), 2A (91-105),
2B (104-121);
Texture : PHYRIC PILLOW BASALT WITH LOCALLY GLASSY CHILLED
MARGINS IN PCES 1+2A AND TRACES OF INTERPILLOW
BRECCIA IN PCE 1E;
Structure : VEINS FILLED BY CALCITE + GREEN SMEC, INTERVALS
0-60CM + 60-90CM + 90-121CM REPRESENT INDIVIDUAL
PILLOWS OR PARTS OF PILLOWS BOUNDED BY CHILL MARGIN;
Alteration : MOD;
Comments : BASALT IS GRAY COLOR;
Vesicles : Size(mm): <2 Percent:
Location: Filling: SMEC,CALCITE
SMEC IS GREEN, ALSO POSSIBLY FILLED WITH
ZEOLITES;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <8
EUHEDRAL;
CLINOPYROXENE ( 3-10%)
Size(mm): <5
EUHEDRAL, PARTIALLY REPLACED BY GREEN SMEC;
OLIVINE ( <1%)
Size(mm): <2
REPLACED BY IDDINGS + GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: CPX,OL,GLASS
GREEN, PARTIALLY REPLACES CPX AND REPLACES OL
PHENOS, REPLACES LARGELY DEVITRIFIED GLASS, FILLS
VESICLES + VEINS;
IDDINGSITE
Minerals Replaced: OL
CALCITE
FILLS VESICLES + VEINS;
ZEOLITE
POSSIBLY FILLS VESICLES;
Leg : 51 Top/Bottom Interval(mm): 0/ 600 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 472.80
Core: 39 Top of Core Depth (m) : 464.70
Sect: 6 Top of Section Depth(m): 472.20
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCE 1A (3-28), 2A (32-35), 2B (35-53), 2C (53-60);
Texture : PHYRIC BASALT PILLOWS WITH HYALOCLASTITE MARGINS;
Structure : INTERVALS 0-35CM + 35-60CM REPRESENT INDIVIDUAL
PILLOWS OR PARTS OF PILLOWS BOUNDED BY CHILL
MARGINS, VEINS FILLED BY CALCITE + GREEN SMEC;
Alteration : MOD;
Vesicles : Size(mm): <1 Percent:
Location: Filling: CALCITE
Groundmass : DARK GRAY;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <5
EUHEDRAL;
CLINOPYROXENE ( 5%)
Size(mm): <4
EUHEDRAL;
OLIVINE ( 5%)
COMPLETELY REPLACED BY GREEN SMEC + CALCITE;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, FILLS VEINS;
CALCITE
Minerals Replaced: OL
REPLACES OL PHENOS, FILLS VESICLES AND VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1490 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 472.49
Core: 40 Top of Core Depth (m) : 471.00
Sect: 1 Top of Section Depth(m): 471.00
LITHOLOGY: PLAG-CPX-OL PHYRIC TO MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (1-3), 2 (6-25), 3A (29-51), 3B (51-79),
4A (80-91), 4B (91-104), 5 (105-119), 6 (121-148);
Texture : PHYRIC TO SPARSELY PHYRIC PILLOW BASALT WITH ALTERED
CHILLED MARGINS IN PCES 4B+5+6, GROUNDMASS IS
APHANITIC TO MICROLITIC OR FINE-GRAINED;
Structure : INTERVALS 0-105CM + 105-150CM REPRESENT INDIVIDUAL
PILLOWS OR PARTS OF PILLOWS BOUNDED BY CHILLED
MARGINS, VEINS FILLED BY CALCITE AND OR GREEN SMEC
+ PYRITE, LOCALLY PERPENDICULAR TO MARGINS IN PCE 4;
Alteration : SLIGHTLY TO MOD
BASALT IS GRAY COLOR LOCALLY ALTERED TO YELLOW-
BROWN ALONG FRACTURED PILLOW MARGINS IN PCES 4A+
4B;
Comments : LIGHT BROWN FINELY LAYERED CHERT IN PCE 1 PROBABLY
FROM SEDIMENT OVERLYING BASEMENT;
Vesicles : Size(mm): <1.5 Percent: 0-2
Location: Filling: CALCITE,SMEC
LOCALLY COALESCE TO FORM CALCITE FILLED VUGS IN
PCE 2;
Groundmass : APHANITIC TO MICROLITIC OR FINE-GRAINED;
Phenocrysts: PLAGIOCLASE ( 3-25%)
Size(mm): 2-7
CLINOPYROXENE ( 1-3%)
Size(mm): 1.5-4
OLIVINE ( 1-15%)
Size(mm): <5
REPLACED BY DARK GREEN SMEC OR MONTMORILLONITE
AND CALCITE;
PHENOS EXTREMELY VARIABLE WITH PLAG TENDING TO BE
CONCENTRATED IN PCE 4 + 6 NEAR LOWER PILLOW
MARGINS WHILE OL AND CPX ARE CONCENTRATED IN PCES
3A + 3B + 5 + 6;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
GREEN, FILLS VESICLES AND VEINS, REPLACES
PARTIALLY DEVITRIFIED GLASS, DARK GREEN REPLACES
OL PHENOS;
CALCITE
Minerals Replaced: OL,GLASS
REPLACES OL PHENOS AND PARTIALLY DEVITRIFED GLASS
FILLS VESICLES + VUGS + VEINS;
PALAGONITE
Minerals Replaced: GLASS
MONTMORILLONITE
Minerals Replaced: GLASS,OL
PYRITE
FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 473.98
Core: 40 Top of Core Depth (m) : 471.00
Sect: 2 Top of Section Depth(m): 472.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (1-35), 1B (35-45), 1C (45-49), 2A (51-62),
2B (64-86), 2C (87-94), 3 (96-99), 4A (101-110),
4B (110-113), 5 (114-128), 6 (130-148);
Texture : PHYRIC PILLOW BASALT WITH GLASSY CHILLED MARGINS IN
PCES 1A+1C+2A+ 3-5, VARIOLITIC GROUNDMASS;
Structure : VEINS FILLED BY CALCITE;
Alteration : SLIGHTLY TO MOD;
Comments : BASALT IS GRAY COLOR;
Vesicles :
Location: Filling: CALCITE
Groundmass : VARIOLITIC;
Phenocrysts: PLAGIOCLASE (10-15%)
CLINOPYROXENE ( 1-5%)
Size(mm): <0.5
OLIVINE ( 5-7%)
Size(mm): <3
REPLACED BY IDDINGS + CALCITE;
CPX + OL PHENOS TEND TO BE CONCENTRATED NEAR
MARGINS;
Replacement: CALCITE
Minerals Replaced: OL
REPLACES OL PHENOS, FILLS VEINS AND VESICLES;
IDDINGSITE
Minerals Replaced: OL
Leg : 51 Top/Bottom Interval(mm): 0/ 680 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 474.68
Core: 40 Top of Core Depth (m) : 471.00
Sect: 3 Top of Section Depth(m): 474.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (2-5), 2A (7-16), 2B (16-52), 3 (55-68);
Texture : PHYRIC PILLOW BASALT WITH ALTERED MARGINS IN PCE 2A,
APHANITIC GROUNDMASS;
Structure : VEINS FILLED BY CLAY + CALCITE;
Alteration : MOD;
Comments : BASALT IS GRAY COLOR;
Vesicles :
Location: Filling: CLAY,CALCITE
Groundmass : APHANITIC;
Phenocrysts: PLAGIOCLASE (10-15%)
CLINOPYROXENE ( 2-3%)
OLIVINE ( 5-7%)
Size(mm): <5
REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
GREEN;
PALAGONITE
Minerals Replaced: GLASS
CLAY
FILLS VEINS + VESICLES;
CALCITE
FILLS VEINS + VESICLES;
Leg : 51 Top/Bottom Interval(mm): 0/1490 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 477.09
Core: 41 Top of Core Depth (m) : 475.60
Sect: 1 Top of Section Depth(m): 475.60
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT WITH MINOR INTERPILLOW BRECCIA;
Piece No. : PCE 1 (2-12), 2 (15-25), 3A (27-41), 3B (41-54),
3C (55-69), 3D (69-78), 3E (78-92), 4 (95-104),
5A (106-115), 5B (116-118), 6 (120-125),
7A (127-137), 7B (137-148);
Texture : PHYRIC PILLOW BASALT WITH DEVITRIFIED MARGINS IN
PCES 3A+4+5+7A AND MINOR INTERPILLOW BRECCIA
IN PCE 5 COMPOSED OF GLASS FRAGMENTS REPLACED BY
GREEN SMEC IN A MATRIX OF CALCITE + GREEN SMEC +
ZEOLITES, CRYSTALLINE GROUNDMASS;
Structure : VEINS FILLED BY CALCITE + GREEN SMEC, CAVITY IN
PCE 3D FILLED BY ZEOLITES;
Alteration : MOD;
Comments : BASALT IS GRAY COLOR;
Vesicles : Size(mm): <0.5 Percent: <1
Location: Filling: CALCITE
Groundmass : CRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <5
EUHEDRAL;
CLINOPYROXENE ( 5%)
Size(mm): <2
EUHEDRAL TO SUBHEDRAL, INCREASE TO 15 PERCENT IN
PCE 3D, PARTIALLY TO COMPLETELY REPLACED BY GREEN
SMEC + CALCITE;
OLIVINE
RARE, PARTIALLY TO COMPLETELY REPLACED BY GREEN
SMEC + CALCITE;
Replacement: SMECTITE
Minerals Replaced: CPX,OL,GLASS
GREEN, PARTIALLY TO COMPLETELY REPLACES CPX + OL
PHENOS + DEVITRIFIED GLASS, FILLS VEINS, REPLACES
GLASS FRAGMENTS + IS FOUND IN MATRIX OF BRECCIA;
CALCITE
Minerals Replaced: CPX,OL,GLASS
CPX + OL PHENOS + DEVITRIFIED GLASS ALL REPLACED,
FILLS VESICLES + VEINS, FOUND IN MATRIX AND
REPLACES GLASS FRAGMENTS IN BRECCIA;
ZEOLITE
FILLS CAVITY IN PCE 3D, FOUND IN MATRIX OF
BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/1450 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 478.55
Core: 41 Top of Core Depth (m) : 475.60
Sect: 2 Top of Section Depth(m): 477.10
LITHOLOGY: PLAG-OL-PYX PHYRIC BASALT;
PILLOW BASALT WITH TRACES OF BRECCIA;
Piece No. : PCE 1 (3-16), 2 (17-28), 3A (31-41), 3B (40-50),
3C (50-58), 4A (61-71), 4B (71-84), 4C (85-96),
5 (97-100), 6 (103-115), 7A (117-132), 7B (132-148);
Texture : PHYRIC PILLOW BASALT WITH ALTERED CHILLED MARGINS IN
PCES 4A+6+7A - MARGINS IN 6+7A DIP RESPECTIVELY
AT AN ANGLE OF 27 DEGREES AND 32 DEGREES TO THE
HORIZONTAL, TRACES OF BRECCIA IN PCE 4 COMPOSED OF
FRAGMENTS OF STRONGLY ALTERED GLASS, APHANITIC TO
VARIOLITIC MARGINS;
Structure : VEINS FILLED BY CALCITE + GREEN SMEC;
Alteration : MOD;
Comments : BASALT IS GRAY COLOR;
Vesicles : Size(mm): Percent: 1-2
Location: Filling: CALCITE,SMEC
INCREASES TO 5 PERCENT IN PCE 4B, SMEC IS GREEN;
Phenocrysts: PLAGIOCLASE ( 10%)
OLIVINE ( 5-8%)
OL COMMON IN PCES 3C + 4C REPLACED BY IDDINGS +
CALCITE;
PYROXENE ( 1%)
PYX INCREASES TO 3-5 PERCENT 0.3MM IN PCE 3;
Replacement: SMECTITE
GREEN, FILLS VESICLES + VEINS;
CALCITE
Minerals Replaced: OL
REPLACES OL PHENOS, FILLS VESICLES + VEINS;
IDDINGSITE
Minerals Replaced: OL
REPLACES OL PHENOS;
SULFIDE
SMALL GLOBULE IN PCE 4B;
Leg : 51 Top/Bottom Interval(mm): 0/1450 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 480.05
Core: 41 Top of Core Depth (m) : 475.60
Sect: 3 Top of Section Depth(m): 478.60
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT WITH MINOR INTERPILLOW BRECCIA;
Piece No. : PCE 1A (2-8), 1B (7-16), 1C (16-30), 2 (35-37),
3A (40-46), 3B (46-51), 3C (50-61), 3D (61-71),
3E (71-81), 4 (85-88), 5 (92-97), 6A (100-111).
6B (111-121), 7A (124-134), 7B (134-145);
Texture : ALTERED PHYRIC PILLOW BASALT, STRONGLY ALTERED
CHILLED MARGINS IN PCES 1+3A+3C+6A, MINOR
INTERPILLOW BRECCIA IN PCES 1+3A+3B COMPOSED OF
DEVITRIFIED GLASS AND GREEN SMEC, APHANITIC TO
MICROLITIC GROUNDMASS;
Structure : MINOR VEINS FILLED BY CALCITE + GREEN SMEC;
Alteration : MOD;
Vesicles : Size(mm): <0.5 Percent: <1
Location: Filling: CALCITE,SMEC
SMEC IS GREEN;
Groundmass : APHANITIC TO MICROLITIC;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): 5
EUHEDRAL, PARTIALLY REPLACED BY CALCITE;
CLINOPYROXENE ( 5%)
Size(mm): 3
EUHEDRAL, PARTIALLY REPLACED BY GREEN SMEC +
CALCITE;
OLIVINE ( 1%)
Size(mm): 2
EUHEDRAL, COMPLETELY REPLACED BY IDDINGS + GREEN
SMEC;
Replacement: CALCITE
Minerals Replaced: PLAG,CPX
PARTIALLY REPLACES PLAG + CPX PHENOS + GROUNDMASS,
FILLS VESICLES + VEINS;
SMECTITE
Minerals Replaced: CPX,OL
GREEN, PARTIALLY REPLACES CPX + OL PHENOS +
GROUNDMASS, LARGELY REPLACES DEVITRIFIED GLASS,
FILLS VESICLES + VEINS, FOUND IN BRECCIA;
IDDINGSITE
Minerals Replaced: OL
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 481.58
Core: 41 Top of Core Depth (m) : 475.60
Sect: 4 Top of Section Depth(m): 480.10
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCE 1A (3-17), 1B (17-27), 1C (27-36), 2 (41-54),
3A (58-73), 3B (73-84), 3C (83-93), 3D (93-105),
4A (107-121), 4B (121-134), 4C (134-148);
Texture : ALTERED PHYRIC BASALT PILLOWS, STRONGLY ALTERED
CHILLED MARGINS IN PCES 1C+2+3D+4A, APHANITIC TO
CRYSTALLINE GROUNDMASS;
Structure : INTERVALS 0-38CM + 38-105CM + 105-150CM REPRESENT
INDIVIDUAL PILLOWS OR PARTS OF PILLOWS BOUNDED BY
CHILLED MARGINS, VEINS FILLED BY CALCITE + ZEOLITES
+ PYRITE + GREEN TO BROWN SMEC;
Alteration : MOD;
Vesicles :
Location: Filling: CALCITE
MINOR, PCE 3B+4B;
Groundmass : APHANITIC TO CRYSTALLINE;
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): 4
EUHEDRAL, PARTIALLY REPLACED BY GREEN SMEC +
RARELY BY PYRITE;
CLINOPYROXENE ( 5%)
Size(mm): 3
LARGELY REPLACED BY GREEN SMEC, EUHEDRAL;
OLIVINE ( 1-3%)
Size(mm): <2
EUHEDRAL, REPLACED BY GREEN SMEC + IDDINGS +
PYRITE;
MAFIC PHENOS CONCENTRATED IN PCE 4A;
Replacement: CALCITE
Minerals Replaced: PLAG
REPLACES PLAG PHENOS, FILLS VESICLES + VEINS;
SMECTITE
Minerals Replaced: PLAG,CPX,OL,GLASS
GREEN, PARTIALLY REPLACES GROUNDMASS + PLAG PHENOS
LARGELY REPLACES CPX PHENOS, REPLACES OL PHENOS +
COMPLETELY DEVITRIFIED GLASS, GREEN TO BROWN FILLS
VEINS;
IDDINGSITE
Minerals Replaced: OL
PYRITE
Minerals Replaced: OL
RARELY REPLACES GROUNDMASS, REPLACES OL PHENOS,
FILLS VEINS;
ZEOLITE
FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 483.08
Core: 41 Top of Core Depth (m) : 475.60
Sect: 5 Top of Section Depth(m): 481.60
LITHOLOGY: PLAG-OL-PYX PHYRIC BASALT;
PILLOW BASALT WITH MINOR INTERPILLOW HYALOCLASTITE
BRECCIA;
Piece No. : PCE 1 (2-18), 2A (20-35), 2B (36-50), 2C (50-56),
2D (55-66), 3A (68-84), 3B (84-100), 4A (102-116),
4B (116-134), 5 (136-140), 6 (142-148);
Texture : PHYRIC PILLOW BASALT, GLASSY CHILLED MARGINS IN
PCES 1+2A+6, MINOR INTERPILLOW HYALOCLASTITE
BRECCIA IN PCE 6 COMPOSED OF SHARDS OF GLASS ALTERED
TO PALAG NEAR MARGINS IN A MATRIX OF CALCITE + CLAY;
Structure : VEINS FILLED BY CALCITE + GREEN SMEC + MINOR
SULFIDES;
Alteration : MOD
BASALT DARK GRAY ALTERED TO GRAY-BROWN NEAR
MARGINS;
Vesicles : Size(mm): 1-2 Percent: 1-2
Location: Filling: CALCITE
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): <5
ALTERED, EUHEDRAL;
OLIVINE ( 5-8%)
Size(mm): <4
EUHEDRAL, REPLACED BY GREEN SMEC + POSSIBLY TALC
OR CALCITE + IDDINGS;
PYROXENE ( 2-3%)
Size(mm): <3
EUHEDRAL;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, FILLS VEINS;
TALC
Minerals Replaced: OL
POSSIBLY REPLACES OL PHENOS;
CALCITE
Minerals Replaced: OL
REPLACES OL PHENOS, FILLS VESICLES + VEINS, FOUND
AS A MATRIX IN BRECCIA;
IDDINGSITE
Minerals Replaced: OL
SULFIDES
MINOR, FILLS VEINS;
PALAGONITE
Minerals Replaced: GLASS
REPLACES SHARDS OF GLASS NEAR MARGINS IN BRECCIA;
CLAY
FOUND AS MATRIX IN BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 486.07
Core: 41 Top of Core Depth (m) : 475.60
Sect: 7 Top of Section Depth(m): 484.60
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCE 1A (2-4), 1B (4-10), 1C (9-18), 2A (20-26),
2B (25-36), 2C (36-50), 3 (52-54), 4A (56-66),
4B (67-75), 4C (75-86), 5 (87-95), 6 (97-101),
7A (103-110), 7B (103-117), 8A (119-127),
8B (127-131), 8C (131-139), 8D (138-140),
9 (142-148);
Texture : PHYRIC BASALT, DARK GRAY SUBOPHITIC GROUNDMASS;
Structure : MASSIVE, MINOR VEINS FILLED BY CALCITE;
Alteration : SLIGHTLY;
Groundmass : SUBOPHITIC;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <5
ALTERED, EUHEDRAL;
OLIVINE ( 5%)
EUHEDRAL, REPLACED BY GREEN SMEC OR POSSIBLY BY
OPAL IN ASSOCIATION WITH PYRITE;
CLINOPYROXENE ( 2%)
Size(mm): <6
LATHS;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS;
OPAL
Minerals Replaced: OL
POSSIBLY REPLACES OL PHENOS;
PYRITE
Minerals Replaced: OL
REPLACES OL PHENOS;
CALCITE
FILLS MINOR VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/ 340 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 486.44
Core: 41 Top of Core Depth (m) : 475.60
Sect: 8 Top of Section Depth(m): 486.10
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCE 1A (2-7), 1B (6-11), 2 (15-21), 3A (26-30),
3B (30-34);
Texture : PHYRIC BASALT, A DARK GRAY OPHITIC GROUNDMASS;
Structure : MASSIVE, VEINS FILLED BY GREEN SMEC + ZEOLITES;
Alteration : SLIGHTLY;
Groundmass : OPHITIC, DARK GRAY;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): 4
EUHEDRAL;
COMBINATION ( 10%)
Size(mm): 3
OL + CPX, EUHEDRAL, COMPLETELY REPLACED BY GREEN
SMEC + ZEOLITES;
Replacement: SMECTITE
Minerals Replaced: CPX,OL
GREEN, COMPLETELY REPLACES CPX + OL, FILLS VEINS;
ZEOLITE
Minerals Replaced: CPX,OL
COMPLETELY REPLACES CPX + OL PHENOS, FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/ 850 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 483.95
Core: 41 Top of Core Depth (m) : 475.60
Sect: 6 Top of Section Depth(m): 483.10
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT WITH MINOR BRECCIA;
Piece No. : PCE 1A (2-11), 1B (11-23), 2A (27-36), 2B (37-47),
2C (47-58), 2D (58-68), 3A (71-74), 3B (74-79),
3C (79-84);
Texture : PHYRIC PILLOW BASALT WITH STRONGLY ALTERED CHILLED
MARGINS IN PCES 1A+2A+2B AND MINOR BRECCIA IN PCE 3
COMPOSED OF FRAGMENTS OF DEVITRIFIED GLASS
ALTERED TO GREEN SMEC IN A MATRIX OF GREEN TO BROWN
SMEC + MINOR CALCITE + POSSIBLY HEMATITE;
Structure : VEINS FILLED WITH GREEN SMEC;
Alteration : MOD;
Vesicles : Size(mm): Percent: RARE
Location: Filling: CALCITE
LARGE VUG IN PCE 1B FILLED WITH CALCITE + GREEN TO
BROWN SMEC;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): 4
EUHEDRAL, PARTIALLY REPLACED BY GREEN SMEC;
CLINOPYROXENE ( 10%)
Size(mm): 3
EUHEDRAL, PARTIALLY REPLACED BY GREEN SMEC;
OLIVINE ( 5%)
Size(mm): 3
EUHEDRAL TO ANHEDRAL, INCREASE TO 10 PERCENT - 4MM
IN PCE 2D, COMPLETELY REPLACED BY GREEN SMEC +
CALCITE + IDDINGS;
Replacement: SMECTITE
Minerals Replaced: PLAG,CPX,OL,GLASS
GREEN, PARTIALLY REPLACES PLAG + CPX PHENOS,
COMPLETELY REPLACES OL PHENOS, FILLS VEINS,
REPLACES DEVITRIFIED GLASS, REPLACES DEVITRIFIED
GLASS FRAGMENTS IN BRECCIA, GREEN TO BROWN FILLS
VUG, FOUND AS MATRIX FOR BRECCIA;
IDDINGSITE
Minerals Replaced: OL
CALCITE
Minerals Replaced: OL
COMPLETELY REPLACES OL PHENOS, FILLS RARE VESICLES
AND LARGE VUG, MINOR AMOUNT FOUND IN BRECCIA
MATRIX;
HEMATITE
POSSIBLY FOUND IN BRECCIA MATRIX;
Leg : 51 Top/Bottom Interval(mm): 850/1420 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 484.52
Core: 41 Top of Core Depth (m) : 475.60
Sect: 6 Top of Section Depth(m): 483.95
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCE 4A (86-100), 4B (100-112), 4C (112-126),
4D (126-142);
Texture : PHYRIC BASALT WITH A FRACTURED FINE GRAINED MARGIN
IN PCE 4A, GROUNDMASS IS CRYSTALLINE;
Structure : MASSIVE;
Alteration : MOD;
Vesicles :
Location: Filling: CALCITE,SMEC
PCE 4C, SMEC IS GREEN;
Groundmass : CRYSTALLINE;
Phenocrysts: PLAGIOCLASE ( <15%)
Size(mm): <4
COMMON IN PCES 4B + 4C;
MAFICS ( 5-10%)
3MM IN PCES 4A+4D, DROPS TO <1MM IN PCES 4B+4C;
Replacement: CALCITE
FILLS VESICLES;
SMECTITE
GREEN, FILLS VESICLES;
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 486.18
Core: 42 Top of Core Depth (m) : 484.70
Sect: 1 Top of Section Depth(m): 484.70
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT WITH MINOR INTERPILLOW LIMESTONE;
Piece No. : PCE 1A (1-10), 1B (8-29), 1C (26-49), 2A (51-59),
2B (56-76), 3 (78-81), 4A (84-93), 4B (93-109),
4C (109-118), 4D (117-134), 5 (136-148);
Texture : ALTERED PHYRIC PILLOW BASALT WITH STRONGLY ALTERED
CHILLED MARGINS IN PCES 1A+1C+2+4A+5 AND GRAY-GREEN
COLORED MINOR INTERPILLOW LIMESTONE CONTAINING
FRAGMENTS OF ALTERED GLASS;
Structure : INTERVALS 0-50CM + 83-150CM REPRESENT INDIVIDUAL
PILLOWS BOUNDED BY CHILLED MARGINS, VEINS FILLED BY
CALCITE + GREEN SMEC + PYRITE;
Alteration : MOD;
Vesicles : PCE 4D CONTAINS A 2CM LONG VUG FILLED BY CALCITE;
Phenocrysts: PLAGIOCLASE (20-25%)
Size(mm): 4-6
EUHEDRAL;
CLINOPYROXENE ( 5%)
Size(mm): 4
EUHEDRAL TO PARTIALLY RESORBED, LARGELY REPLACED
BY GREEN SMEC + CALCITE;
OLIVINE ( 3-5%)
Size(mm): 3
EUHEDRAL, COMPLETELY REPLACED BY GREEN SMEC +
CALCITE;
Replacement: SMECTITE
Minerals Replaced: CPX,OL,GLASS
GREEN, REPLACES CPX + OL PHENOS, PARTIALLY
REPLACES GLASS THROUGHOUT AND GROUNDMASS IN PCES
4+5, FILLS VEINS;
CALCITE
Minerals Replaced: CPX,OL
REPLACES CPX+OL PHENOS, FILLS VUG IN PCE 4D,
FILLS VEINS;
PYRITE
FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 487.67
Core: 42 Top of Core Depth (m) : 484.70
Sect: 2 Top of Section Depth(m): 486.20
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (3-7), 2A (9-20), 2B (21-65), 3 (67-70),
4A (72-91), 4B (90-113), 5 (115-126), 6 (128-147);
Texture : PHYRIC PILLOW BASALT WITH ALTERED CHILLED MARGINS IN
PCES 1+2A+4B+5+6;
Structure : INTERVALS 8-113CM + 127-150CM REPRESENT INDIVIDUAL
PILLOWS BOUNDED BY CHILLED MARGINS, MINOR VEINS
FILLED BY CALCITE AND GREEN SMEC;
Alteration : FRESH TO MOD
BASALT IS DARK GRAY ALTERED TO GRAY-BROWN ALONG
PILLOW MARGINS;
Vesicles : Size(mm): 1-2 Percent: 1
Location: Filling: CALC OR SMEC
SMEC IS GREEN;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <5
EUHEDRAL, PARTIALLY REPLACED BY CALCITE + GREEN
SMEC;
OLIVINE ( 3-5%)
EUHEDRAL, REPLACED BY CALCITE + IDDINGS NEAR
PILLOW MARGINS AND BY GREEN SMEC IN PILLOW
INTERIORS;
PYROXENE ( 2%)
Size(mm): <5
LATHS;
Replacement: CALCITE
Minerals Replaced: OL,PLAG
PARTIALLY REPLACES PLAG PHENOS AND REPLACES OL
PHENOS NEAR PILLOW MARGINS, FILLS VESICLES AND
MINOR VEINS;
SMECTITE
Minerals Replaced: OL,PLAG
GREEN, PARTIALLY REPLACES PLAG PHENOS AND REPLACES
OL PHENOS IN PILLOW INTERIORS, FILLS VESICLES AND
MINOR VEINS;
IDDINGSITE
Minerals Replaced: OL
REPLACES OL PHENOS NEAR MARGINS;
PALAGONITE
REPLACES LARGELY DEVITRIFIED GLASS;
Leg : 51 Top/Bottom Interval(mm): 0/1300 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 489.00
Core: 42 Top of Core Depth (m) : 484.70
Sect: 3 Top of Section Depth(m): 487.70
LITHOLOGY: PLAG-OL-PYX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (2-46), 2 (48-68), 3 (69-81), 4A (83-105),
4B (106-111), 4C (111-130);
Texture : PHYRIC DARK GRAY PILLOW BASALT WITH CHILLED GLASSY
MARGINS IN PCES 1+3+4A;
Structure : VEINS FILLED BY CALCITE + GREEN SMEC + SULFIDES,
PCE 3 CONTAINS SLICKENSIDES;
Alteration : MOD;
Vesicles : Size(mm): 1-2 Percent: 1
Location: Filling: CALCITE,SMEC
SMEC IS GREEN;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <6
EUHEDRAL;
OLIVINE ( 2-3%)
Size(mm): <5
EUHEDRAL, REPLACED BY GREEN SMEC;
PYROXENE ( <1%)
Size(mm): <4
LATHS;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, FILLS VESICLES + VEINS;
CALCITE
FILLS VESICLES + VEINS;
SULFIDES
FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1500 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 490.70
Core: 42 Top of Core Depth (m) : 484.70
Sect: 4 Top of Section Depth(m): 489.20
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT WITH TRACES OF BRECCIA;
Piece No. : PCE 1 (2-37), 2A (41-71), 2B (70-87), 3 (90-105),
4 (107-136), 5 (138-144), 6 (146-150);
Texture : PHYRIC PILLOW BASALT WITH ALTERED MARGINS IN PCES
2B+3+5 AND TRACES OF BRECCIA IN PCE 6 COMPOSED
OF FRAGMENTS OF BASALT ALTERED TO GREEN TO BROWN
SMEC OR POSSIBLY HEMATITE IN A MATRIX OF CALCITE;
Structure : VEINS FILLED BY CALCITE + GREEN SMEC + PYRITE +
ZEOLITE;
Alteration : MOD;
Vesicles :
Location: Filling: CALCITE,SMEC
SMEC IS GREEN;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): 4
EUHEDRAL;
CLINOPYROXENE (10-15%)
Size(mm): 4
EUHEDRAL TO SUBHEDRAL, PARTIALLY REPLACED BY GREEN
SMEC + CALCITE;
OLIVINE ( 5%)
Size(mm): 3
EUHEDRAL, COMPLETELY REPLACED BY GREEN SMEC +
IDDINGS, MAFIC PHENOS CONCENTRATED IN 21CM-34CM
INTERVAL;
Replacement: SMECTITE
Minerals Replaced: CPX,OL,GLASS
GREEN, PARTIALLY REPLACES CPX PHENOS, COMPLETELY
REPLACES OL PHENOS, REPLACES GLASS + GROUNDMASS IN
PCE 5, FILLS VESICLES + VEINS, GREEN TO BROWN
REPLACES BASALT FRAGMENTS IN BRECCIA;
CALCITE
Minerals Replaced: CPX
PARTIALLY REPLACES CPX PHENOS, FILLS VESICLES +
VEINS, FOUND AS MATRIX IN BRECCIA;
IDDINGSITE
Minerals Replaced: OL
COMPLETELY REPLACES OL PHENOS;
PYRITE
FILLS VEINS;
ZEOLITE
FILLS VEINS;
HEMATITE
POSSIBLY REPLACES BASALT FRAGMENTS IN BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/1420 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 492.12
Core: 42 Top of Core Depth (m) : 484.70
Sect: 5 Top of Section Depth(m): 490.70
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (1-30), 2 (33-57), 3 (59-64), 4 (66-75),
5 (77-89), 6 (92-97), 7 (101-110), 8 (111-121),
9 (123-142);
Texture : PHYRIC PILLOW BASALT WITH CHILLED GLASSY MARGINS IN
PCES 2+8;
Structure : MINOR VESICLES FILLED BY CALCITE + GREEN SMEC +
PYRITE;
Alteration : FRESH TO MOD;
Comments : BASALT IS DARK GRAY COLOR;
Vesicles : Size(mm): 1-3 Percent: 2-3
Location: Filling: SMEC,CALCITE
SMEC IS GREEN;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <3
EUHEDRAL;
OLIVINE ( 1%)
Size(mm): <3
REPLACED BY GREEN SMEC + CALCITE;
CLINOPYROXENE ( <1%)
Size(mm): 2-3
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, FILLS VESICLES + VEINS;
CALCITE
Minerals Replaced: OL
REPLACES OL PHENOS, FILLS VESICLES + VEINS;
PYRITE
FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Ui, Tadahide
Hole: 417D Sample Midpoint (m) : 493.68
Core: 42 Top of Core Depth (m) : 484.70
Sect: 6 Top of Section Depth(m): 492.20
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-14), 1B (14-26), 1C (26-41), 2 (44-72),
3A (74-78), 3B (74-88), 4 (91-103), 5 (106-116),
6 (117-122), 7 (124-132), 8 (135-148);
Texture : PHYRIC PILLOW BASALT WITH CHILLED MARGINS IN PCES
3A+5, GROUNDMASS IS CRYSTALLINE PARTIALLY REPLACED
BY GREEN SMEC AND CALCITE;
Structure : VEINS FILLED BY CALCITE + GREEN SMEC + PYRITE;
Alteration : MOD;
Vesicles : Size(mm): <1 Percent: 2
Location: Filling: SMEC,CALC,ZEOLITE
SMEC IS GREEN;
Groundmass : CRYSTALLINE, PARTIALLY REPLACED BY GREEN SMEC
+ CALCITE;
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): <3
EUHEDRAL;
CLINOPYROXENE ( 3%)
Size(mm): 2
EUHEDRAL TO SUBHEDRAL, PARTIALLY REPLACED BY GREEN
SMEC;
OLIVINE ( RARE%)
INCREASE TO 20 PERCENT IN PCE 2, COMPLETELY
REPLACED BY IDDINGS;
Replacement: SMECTITE
GREEN, PARTIALLY REPLACES CPX PHENOS AND
GROUNDMASS, FILLS VEINS + VESICLES;
IDDINGSITE
Minerals Replaced: OL
COMPLETELY REPLACES OL PHENOS;
CALCITE
FILLS VESICLES + VEINS, PARTIALLY REPLACES
GROUNDMASS;
ZEOLITE
FILLS VESICLES;
PYRITE
FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/ 310 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 494.01
Core: 42 Top of Core Depth (m) : 484.70
Sect: 7 Top of Section Depth(m): 493.70
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (2-9), 2 (11-17), 3 (19-31);
Texture : PHYRIC PILLOW BASALT;
Structure : MINOR VEINS FILLED WITH GREEN SMEC AND-OR CALCITE
+ SULFIDES;
Alteration : SLIGHTLY;
Comments : BASALT IS DARK GRAY COLOR;
Vesicles : Size(mm): 1-2 Percent: 2
Location: Filling: CALC,SMEC,SULFIDE
FILLED WITH CALCITE AND/OR GREEN SMEC
OCCASIONALLY LINED WITH SULFIDES;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <3
EUHEDRAL;
OLIVINE ( 1-2%)
Size(mm): <3
EUHEDRAL, REPLACED BY GREEN SMEC;
CLINOPYROXENE ( 1%)
Size(mm): <3
LATHS;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, FILLS VESICLES + VEINS;
CALCITE
FILLS VESICLES + VEINS;
SULFIDES
OCCASIONALLY LINES VESICLES AND FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1410 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 495.21
Core: 43 Top of Core Depth (m) : 493.80
Sect: 1 Top of Section Depth(m): 493.80
LITHOLOGY: PLAG-OL-CPX MOD PHYRIC BASALT;
PILLOW BASALT WITH TRACES OF INTERPILLOW BRECCIA;
Piece No. : PCE 1A (2-13), 1B (13-21), 1C (21-31), 2A (34-45),
2B (45-56), 2C (55-68), 3A (71-80), 3B (79-89),
3C (89-95), 3D (95-106), 4 (108-112), 5 (116-125),
6 (127-141);
Texture : MOD PHYRIC PILLOW BASALT WITH STRONGLY ALTERED
CHILLED MARGINS IN PCES 2A+ 3C-5 AND TRACES OF
INTERPILLOW BRECCIA IN PCE 5, FINE TO COARSE-GRAINED
MICROLITIC TO SUBOPHITIC GROUNDMASS;
Structure : VEINS FILLED BY CALCITE OR GREEN SMEC;
Alteration : FRESH TO MOD;
Comments : BASALT IS GRAY COLOR;
Vesicles : Size(mm): <0.5 Percent: 1-3
Location: Filling: CALCITE,SMEC
SMEC IS GREEN;
Groundmass : FINE TO COARSE-GRAINED, MICROLITIC TO SUBOPHITIC;
Phenocrysts: PLAGIOCLASE ( 1-2%)
Size(mm): <1.5
INCREASES TO 10 PERCENT <2MM IN PCE 6;
OLIVINE ( 1-3%)
Size(mm): <2
REPLACED BY GREEN SMEC + CALCITE;
CLINOPYROXENE ( 1-2%)
Size(mm): <1
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
GREEN, REPLACES OL PHENOS AND DEVITRIFIED GLASS,
FILLS VESICLES + VEINS;
CALCITE
Minerals Replaced: OL,GLASS
REPLACES OL PHENOS AND DEVITRIFIED GLASS, FILLS
VESICLES + VEINS;
PALAGONITE
Minerals Replaced: GLASS
REPLACES DEVITRIFIED GLASS;
Leg : 51 Top/Bottom Interval(mm): 0/1490 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 496.79
Core: 43 Top of Core Depth (m) : 493.80
Sect: 2 Top of Section Depth(m): 495.30
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCE 1A (1-15), 1B (16-30), 1C (31-44), 1D (45-61),
1E (61-76), 1F (77-91), 1G (91-105), 1H (105-120),
1I (120-133), 1J (133-149);
Texture : PHYRIC BASALT WITH INTERSERTAL TO SUBOPHITIC
GROUNDMASS;
Structure : MASSIVE, MINOR VEINS FILLED BY CALCITE + GREEN SMEC;
Alteration : SLIGHTLY;
Comments : BASALT IS DARK GRAY COLOR;
Vesicles : Size(mm): 1-3 Percent: 3-4
Location: Filling: CALCITE,SMEC
PCES 1A-1D;
Size(mm): 1-3 Percent: 1-2
Location: Filling: CALCITE,SMEC
PCES 1D-1J;
SMEC IS GREEN;
Groundmass : INTERSERTAL TO SUBOPHITIC;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <3
EUHEDRAL;
OLIVINE ( 2%)
Size(mm): <3
EUHEDRAL, REPLACED BY GREEN SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <3
LATHS;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, FILLS VESICLES + VEINS;
CALCITE
FILLS VESICLES + VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1450 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 498.25
Core: 43 Top of Core Depth (m) : 493.80
Sect: 3 Top of Section Depth(m): 496.80
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
Piece No. : PCE 1A (2-15), 1B (15-29), 1C (29-43), 1D (44-57),
1E (57-70), 1F (70-85), 1G (85-98), 1H (98-112),
1I (113-126), 1J (126-145);
Texture : SPARSELY PHYRIC BASALT WITH COARSE-GRAINED
SUBOPHITIC GROUNDMASS;
Structure : MASSIVE, VEINS FILLED BY GREEN SMEC + CALCITE;
Alteration : MOD
BASALT IS DARK GRAY ALTERED TO GREENISH BROWN
ALONG VEINS FILLED WITH GREEN SMEC;
Vesicles : Size(mm): <0.5 Percent: 2
Location: Filling: CALCITE OR SMEC
SMEC IS GREEN;
Groundmass : COARSE-GRAINED SUBOPHITIC;
Phenocrysts: PLAGIOCLASE ( <1%)
Size(mm): <5
OLIVINE ( <1%)
Size(mm): 1-2
REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, FILLS VESICLES + VEINS;
CALCITE
FILLS VESICLES + VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1490 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 499.79
Core: 43 Top of Core Depth (m) : 493.80
Sect: 4 Top of Section Depth(m): 498.30
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCE 1A (2-17), 1B (17-32), 1C (32-47), 1D (47-60),
1E (61-75), 1F (75-88), 1G (89-102), 1H (102-111),
1I (111-122), 1J (121-135), 1K (135-149);
Texture : PHYRIC BASALT WITH A DARK GRAY SUBOPHITIC
GROUNDMASS;
Structure : MASSIVE, MINOR VEINS FILLED WITH CALCITE + GREEN
SMEC;
Alteration : SLIGHTLY;
Vesicles : Size(mm): 1-2 Percent: 2
Location: Filling: CALCITE
Groundmass : DARK GRAY SUBOPHITIC;
Phenocrysts: PLAGIOCLASE ( 5-8%)
Size(mm): <3
EUHEDRAL;
OLIVINE ( <1%)
Size(mm): <3
REPLACED BY GREEN SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <10
LATHS;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, FILLS MINOR VEINS;
CALCITE
FILLS VESICLES + MINOR VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1250 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 501.05
Core: 43 Top of Core Depth (m) : 493.80
Sect: 5 Top of Section Depth(m): 499.80
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
Piece No. : PCE 1A (2-15), 1B (15-26), 1C (15-38), 1D (38-50),
1E (50-58), 1F (58-71), 1G (72-82), 1H (82-96),
1I (96-112), 1J (112-125);
Texture : SPARSELY PHYRIC BASALT, COARSE-GRAINED SUBOPHITIC
GROUNDMASS IN PCES 1A-1H, FINE-GRAINED MICROLITIC
GROUNDMASS IN PCES 1I-1J;
Structure : MASSIVE, SOME VEINS FILLED BY GREEN SMEC OR
CALCITE + PYRITE, VEINS IN PCES 1D-1E GRACEFULLY
CURVED;
Alteration : SLIGHTLY TO MOD
BROWN ALTERATION HALOES ALONG VEINS;
Groundmass : COARSE-GRAINED SUBOPHITIC IN PCES 1A-1H, FINE
GRAINED MICROLITIC IN PCES 1I-1J;
Phenocrysts: PLAGIOCLASE ( 2%)
Size(mm): <2
OLIVINE ( 2-5%)
Size(mm): <3
REPLACED BY GREEN SMEC + CALCITE;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, FILLS VEINS;
CALCITE
Minerals Replaced: OL
REPLACES OL PHENOS, FILLS VEINS;
PYRITE
FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 1250/1490 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 501.29
Core: 43 Top of Core Depth (m) : 493.80
Sect: 5 Top of Section Depth(m): 501.05
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT WITH TRACES OF BRECCIA;
Piece No. : PCE 2A (127-133), 2B (134-149);
Texture : PHYRIC PILLOW BASALT WITH ALTERED CHILLED MARGINS
AND TRACES OF BRECCIA IN PCE 2A COMPOSED OF
FRAGMENTS OF DEVITRIFIED GLASS REPLACED BY GREEN
SMEC + PALAGONITE + POSSIBLY CALCITE, APHANITIC TO
FINE-GRAINED MICROLITIC GROUNDMASS;
Structure : VEINS FILLED BY GREEN SMEC;
Alteration : SLIGHTLY TO MOD;
Comments : BASALT IS LIGHT GRAY COLOR;
Vesicles : Size(mm): <0.3 Percent: 3
Location: Filling: CALCITE
PCE 2B;
Groundmass : APHANITIC TO FINE-GRAINED MICROLITIC;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): 1-5
INCREASE IN SIZE WITH DEPTH;
OLIVINE ( 5-7%)
Size(mm): <2
REPLACED BY GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
GREEN, REPLACES OL PHENOS, FILLS VEINS, REPLACES
DEVITRIFIED GLASS IN BRECCIA;
CALCITE
Minerals Replaced: GLASS
FILLS VESICLES, REPLACES DEVITRIFIED GLASS IN
BRECCIA;
PALAGONITE
Minerals Replaced: GLASS
REPLACES DEVITRIFIED GLASS IN BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/1400 Analyst: Juteau, T.
Hole: 417D Sample Midpoint (m) : 502.70
Core: 43 Top of Core Depth (m) : 493.80
Sect: 6 Top of Section Depth(m): 501.30
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (2-17), 2 (20-33), 3A (34-41), 3B (41-47),
4A (50-57), 4B (57-65), 4C (66-78), 5A (80-90),
5B (91-105), 6A (108-117), 6B (117-124),
6C (124-127), 7 (130-140);
Texture : PHYRIC PILLOW BASALT WITH GLASSY CHILLED MARGINS IN
PCE 5A;
Structure : MINOR VEINS FILLED BY GREEN SMEC + CALCITE;
Alteration : FRESH TO SLIGHTLY;
Comments : BASALT IS DARK GRAY COLOR;
Vesicles : Size(mm): 1-3 Percent: 2
Location: CA Filling: LCITE OR SMEC
SMEC IS GREEN;
Phenocrysts: PLAGIOCLASE ( 7-10%)
Size(mm): <5
ALTERED, EUHERDAL;
OLIVINE ( 3-4%)
Size(mm): <10
REPLACED BY GREEN SMEC + IDDINGS + CALCITE;
CLINOPYROXENE ( 3%)
Size(mm): <3
ALTERED LATHS;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, FILLS VESICLES + VEINS;
IDDINGSITE
Minerals Replaced: OL
CALCITE
Minerals Replaced: OL
REPLACES OL PHENOS, FILLS VEINS + VESICLES;
Leg : 51 Top/Bottom Interval(mm): 0/ 620 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 503.42
Core: 43 Top of Core Depth (m) : 493.80
Sect: 7 Top of Section Depth(m): 502.80
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-6), 1B (7-16), 2 (18-24), 3 (26-31),
4A (36-46), 4B (46-52), 5 (55-62);
Texture : PHYRIC PILLOW BASALT WITH ALTERED CHILLED MARGINS IN
PCES 2+4, APHANITIC TO FINE-GRAINED MICROLITIC
GROUNDMASS;
Structure : MINOR VEINS FILLED BY GREEN SMEC;
Alteration : MOD;
Comments : BASALT IS GRAY COLOR, PCE 5 CONTAINS POSSIBLE
SLICKENSIDES IN GREEN SMEC;
Vesicles : Size(mm): <0.3 Percent: <4
Location: Filling: CALCITE OR SMEC
PCES 1-2, SMEC IS GREEN, PCE 4A CONTAINS A
LARGE CAVITY WITH A LINING OF GREEN SMEC AND A
CALCITE CORE;
Groundmass : APHANITIC TO FINE-GRAINED MICROLITIC;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <2
OLIVINE ( 10%)
Size(mm): <2
REPLACED BY GREEN SMEC;
CLINOPYROXENE ( 3%)
Size(mm): <1.5
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
GREEN, REPLACES OL PHENOS + DEVITRIFIED GLASS,
FILLS VESICLES + VEINS, LINES LARGE CAVITY IN PCE
4A;
PALAGONITE
Minerals Replaced: GLASS
REPLACES DEVITRIFIED GLASS;
CALCITE
Minerals Replaced: GLASS
REPLACES DEVITRIFIED GLASS, FILLS VESICLES + CORE
OF LARGE CAVITY IN PCE 4A;
Leg : 51 Top/Bottom Interval(mm): 0/1490 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 504.39
Core: 44 Top of Core Depth (m) : 502.90
Sect: 1 Top of Section Depth(m): 502.90
LITHOLOGY: PLAG-OL-PYX PHYRIC BASALT;
Piece No. : PCE 1 (2-9), 2A (1-14), 2B (15-24), 2C (24-33),
3A (34-68), 3B (68-71), 4A (74-77), 4B (74-77),
5 (79-82), 6A (86-101) ,6B (101-110), 6C (111-117),
6D (118-122), 7 (124-149);
Texture : PHYRIC BASALT WITH POSSIBLE CHILLED MARGIN IN PCE 6A
AND TRACES OF HYALOCLASTITE BRECCIA IN PCE 1+2,
GROUNDMASS FINE TO MEDIUM GRAINED;
Structure : VEINS COMMON IN PCES 1-3 +6 FILLED BY DARK GREEN
SMEC AND CALCITE;
Alteration : FRESH TO SLIGHTLY;
Vesicles : Size(mm): Percent: 1-2
Location: Filling: CALCITE,CELAD
Groundmass : FINE TO MEDIUM GRAINED;
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): <3
OLIVINE ( 5%)
Size(mm): <1
REPLACED BY IDDINGS;
PYROXENE ( 3-5%)
Size(mm): <1
Replacement: IDDINGSITE
Minerals Replaced: OL
CALCITE
FILLS VESICLES + VEINS;
SMECTITE
DARK GREEN, FILLS VEINS;
CELADONITE
FILLS VESICLES;
Leg : 51 Top/Bottom Interval(mm): 0/ 430 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 504.83
Core: 44 Top of Core Depth (m) : 502.90
Sect: 2 Top of Section Depth(m): 504.40
LITHOLOGY: OL-PLAG-CPX SPARSELY PHYRIC BASALT;
Piece No. : PCE 1A (2-14), 1B (8-36), 1C (36-43);
Texture : SPARSELY PHYRIC WITH A COARSE GRAINED SUBOPHITIC
GROUNDMASS WHICH DECREASES IN GRAIN SIZE DOWNWARD;
Structure : VEINS FILLED BY BROWN TO GREEN SMEC OR BY CALCITE
AND PYRITE;
Alteration : SLIGHTLY;
Comments : INTERVAL 8-15CM CONTAINS SLICKENSIDES WITH A DIP OF
55 DEGREES AND A 45 DEGREE PITCH;
Vesicles : Size(mm): <4 Percent:
Location: Filling: CALCITE
PCE 1C CONTAINS A SMALL NUMBER OF LARGE <4MM
VESICLES;
Groundmass : COARSE-GRAINED SUBOPHITIC WHICH DECREASES IN GRAIN
SIZE DOWNWARDS;
Phenocrysts: PLAGIOCLASE ( 2%)
Size(mm): <1.5
OLIVINE ( 3%)
Size(mm): <3
REPLACED BY GREEN SMEC + CALCITE;
CLINOPYROXENE ( 1%)
Size(mm): <1
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, BROWN TO GREEN FILLS
VEINS;
CALCITE
Minerals Replaced: OL
REPLACES OL PHENOS, FILLS VESICLES + VEINS;
PYRITE
FILLS VEINS;
Leg : 51 Top/Bottom Interval(mm): 430/1430 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 505.83
Core: 44 Top of Core Depth (m) : 502.90
Sect: 2 Top of Section Depth(m): 504.83
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT WITH MINOR INTERPILLOW BRECCIA;
Piece No. : PCE 2 (45-51), 3 (55-66), 4 (68-73), 5A (76-87),
5B (87-95), 6 (97-101), 7 (104-113), 8 (115-126),
9 (131-137), 10 (139-143);
Texture : PHYRIC PILLOW BASALT WITH ALTERED CHILLED MARGINS IN
PCES 2+4+5A+9 AND MINOR INTERPILLOW BRECCIA IN PCES
4+9 COMPOSED OF FRAGMENTS OF BASALT IN A MATRIX OF
ALTERED GLASS, GROUNDMASS IS APHANITIC TO
HYALOPILITIC ALONG MARGINS FINE TO MEDIUM GRAINED OR
MICROLITIC IN PILLOW INTERIORS;
Structure : VEINS FILLED BY GREEN SMEC + CALCITE;
Alteration : MOD
BASALT IS GRAY ALTERED TO BROWN ALONG VEINS;
Vesicles : Size(mm): <0.3 Percent:
Location: Filling: CALCITE
MINOR, LOCATED IN PCES 5-10;
Groundmass : APHANITIC TO HYALOPILITIC ALONG MARGINS FINE TO
MEDIUM GRAINED OR MICROLITIC IN PILLOW INTERIORS;
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): <2
OLIVINE ( 7-10%)
Size(mm): <3
REPLACED BY GREEN SMEC + CALCITE;
CLINOPYROXENE ( 5%)
Size(mm): <1
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
GREEN,REPLACES OL PHENOS + GLASS, FILLS VEINS;
CALCITE
FILLS VEINS, REPLACES OL PHENOS + GLASS, FILLS
VESICLES;
PALAGONITE
Minerals Replaced: GLASS
Leg : 51 Top/Bottom Interval(mm): 0/1440 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 507.34
Core: 44 Top of Core Depth (m) : 502.90
Sect: 3 Top of Section Depth(m): 505.90
LITHOLOGY: PLAG-OL-PYX BASALT;
Piece No. : PCE 1 (1-14), 2A (17-27), 2B (28-39), 2C (40-50),
2D (50-61), 2E (61-69), 3 (72-86), 4A (90-100),
4B (100-110), 4C (111-118), 4D (117-130),
4E (130-136), 4F (136-144);
Texture : PHYRIC BASALT WITH POSSIBLE CHILLED MARGINS IN PCES
1+4F AND MINOR BRECCIA IN PCE 1 COMPOSED OF ALTERED
BASALTS FRAGMENTS IN A MATRIX OF CALCITE + CLAY;
Structure : PCE 2A CONTAINS A NETWORK OF INTERCONNECTED VEINS
FILLED BY CALCITE + CLAY;
Alteration : SLIGHTLY TO MOD;
Vesicles : Size(mm): Percent: 2
Location: Filling: CALCITE
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): <6
OLIVINE ( 5-7%)
Size(mm): <3
REPLACED BY IDDINGS;
PYROXENE ( 1-3%)
Size(mm): 1
Replacement: IDDINGSITE
Minerals Replaced: OL
CALCITE
FILLS VESICLES, FILLS VEINS, FOUND IN BRECCIA
MATRIX;
CLAY
FILLS VEINS, FOUND IN BRECCIA MATRIX;
Leg : 51 Top/Bottom Interval(mm): 0/1430 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 508.83
Core: 44 Top of Core Depth (m) : 502.90
Sect: 4 Top of Section Depth(m): 507.40
LITHOLOGY: PLAG-OL-CPX SPARSELY TO MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (3-8), 2 (12-21), 3 (25-34), 4 (36-47),
5 (51-66), 6A (72-86), 6B (71-77), 7 (88-103),
8A (106-120), 8B (118-128), 8C (124-143);
Texture : SPARSELY TO MOD PHYRIC BASALT WITH ALTERED CHILLED
MARGINS IN PCES 1+3+5, APHANITIC GROUNDMASS ALONG
MARGINS AND A FINE TO MEDIUM GRAINED OR MICROLITIC
GROUNDMASS IN PILLOW INTERIORS;
Structure : VEINS FILLED BY GREEN SMEC AND CALCITE;
Alteration : MOD;
Comments : PCE 8A CONTAINS SLICKENSIDES WITH A 45 DEGREE PITCH;
Vesicles :
Location: Filling: CALCITE
INCREASE IN ABUNDANCE WITH DEPTH TO 5 PERCENT <0.6
MM IN PCES 5+6;
Groundmass : APHANITIC (C ALO%)
Size(mm): NG MARGINS
OR MICROLITIC IN PILLOW INTERIORS;
Phenocrysts: PLAGIOCLASE ( 3%)
Size(mm): <2
INCREASES TO 15 PERCENT - <0.5MM IN PCE 8;
OLIVINE ( 3%)
Size(mm): <2
REPLACED BY GREEN SMEC + CALCITE;
CLINOPYROXENE ( <1%)
Size(mm): <1
AUGITE;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS + DEVITRIFIED GLASS,
FILLS VEINS;
CALCITE
Minerals Replaced: OL
REPLACES OL PHENOS + DEVITRIFIED GLASS, FILLS
VESICLES + VEINS;
PALAGONITE
REPLACES DEVITRIFIED GLASS;
Leg : 51 Top/Bottom Interval(mm): 0/ 370 Analyst: Rusinov, V.
Hole: 417D Sample Midpoint (m) : 509.27
Core: 44 Top of Core Depth (m) : 502.90
Sect: 5 Top of Section Depth(m): 508.90
LITHOLOGY: OL-PLAG-CPX SPARSELY PHYRIC BASALT;
Piece No. : PCE 1A (3-13), 1B (14-19), 1C (20-24), 2 (27-30),
3 (32-37);
Texture : SPARSELY PHYRIC BRECCIATED BASALT, MICROLITIC TO
SUBOPHITIC GROUNDMASS;
Structure : NUMEROUS VEINS CONTAIN BASALT FRAGMENTS IN A MATRIX
OF GREEN SMEC;
Alteration : MOD;
Vesicles : Size(mm): <0.6 Percent: <1
Location: Filling: CALCITE
Groundmass : MICROLITIC TO SUBOPHITIC;
Phenocrysts: PLAGIOCLASE ( 1%)
Size(mm): <1.5
OLIVINE ( 2%)
Size(mm): <2
REPLACED BY GREEN SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <0.5
AUGITE;
Replacement: SMECTITE
Minerals Replaced: OL
GREEN, REPLACES OL PHENOS, MATRIX OF BRECCIA;
CALCITE
FILLS VESICLES;
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 513.48
Core: 45 Top of Core Depth (m) : 512.00
Sect: 1 Top of Section Depth(m): 512.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT WITH LOCALLY BRECCIATED PILLOW
INTERIORS;
Piece No. : PCE 1A (1-15), 1B (15-22), 1C (22-31), 2A (33-46),
2B (46-61), 3 (64-66), 4A (69-74), 4B (74-85),
5 (87-90), 6A (92-103), 6B (102-110), 6C (111-120),
6D (120-125), 6E (124-127), 6F (127-135),
6G (135-148);
Texture : PHYRIC PILLOW BASALT WITH ALTERED BRECCIATED MARGINS
IN PCES 1+2A+ 3-6A AND LOCALLY BRECCIATED PILLOW
INTERIORS IN A MATRIX OF CLAY AND MINOR CALCITE;
Structure : LARGE VEINS AND PATCHES IN PCES 6B+6C+6F FILLED BY
CALCITE + CLAY;
Alteration : MOD;
Comments : PCES 2A+2B+4B CONTAIN SLICKENSIDES THE LATTER IN
DEVITRIFIED GLASS;
Vesicles : Size(mm): Percent: <5
Location: Filling: CALC OR SMEC
SMEC IS GREEN, SHRINKAGE VESICLES INDICATE
TILTING;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
OLIVINE ( 5%)
Size(mm): <4
CLINOPYROXENE ( 2%)
Size(mm): 2
Replacement: CALCITE
FILLS VESICLES + VEINS + LARGE PATCHES, MATRIX OF
BRECCIA;
SMECTITE
GREEN, FILLS VESICLES;
CLAY
FILLS VEINS + LARGE PATCHES, MATRIX OF BRECCIA;
Leg : 51 Top/Bottom Interval(mm): 0/1420 Analyst: Sinton, J.
Hole: 417D Sample Midpoint (m) : 514.92
Core: 45 Top of Core Depth (m) : 512.00
Sect: 2 Top of Section Depth(m): 513.50
LITHOLOGY: PLAG-OL-PYX PHYRIC BASALT;
PILLOW BASALT WITH BRECCIATED MARGINS;
Piece No. : PCE 1 (2-13), 2A (16-26), 2B (26-37), 2C (37-49),
2D (48-60), 3A (62-78), 3B (78-89), 4 (91-93),
5 (95-100), 6 (102-111), 7 (114-124), 8 (126-133),
9 (134-142);
Texture : PHYRIC PILLOW BASALT WITH BRECCIATED MARGINS IN PCES
1+2A;
Structure : NUMEROUS VEINS FILLED WITH CLAY + CALCITE;
Alteration : MOD;
Vesicles : Size(mm): Percent: <5
PCE 6 CONTAINS A VUG WITH CALCITE CRYSTALS AND
BOTRYOIDAL GROWTHS OF GREEN SMEC;
Phenocrysts: PLAGIOCLASE ( 5-10%)
OLIVINE ( 5%)
REPLACED BY IDDINGS + CALCITE;
PYROXENE ( 1-5%)
Replacement: IDDINGSITE
Minerals Replaced: OL
REPLACES OL PHENOS;
CALCITE
Minerals Replaced: OL
REPLACES OL PHENOS, FILLS VEINS, CRYSTALS FILL VUG
IN PCE 6;
SMECTITE
BOTRYOIDAL GREEN WITH REFRACTIVE INDEX OF 1.500-
1.510 FOUND IN VUG OF PCE 6;
CLAY
FILLS VEINS;
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