Leg : 51 Top/Bottom Interval(mm): 1030/1230 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 199.73
Core: 22 Top of Core Depth (m) : 198.50
Sect: 1 Top of Section Depth(m): 199.53
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
Piece No. : PCES 1 (103-109), 2 (111-114), 3 (117-119),
4 (121-123);
Texture : SPARSELY PHYRIC;
Structure : BASALTIC COBBLES,VEINS FILLED BY CALCITE;
Alteration : EXTENSIVELY
ALTERED TO YELLOW-GRAY,YELLOW-BROWN NEAR MARGINS,
MARGINS OF PCE 1 ALTERED TO BLUE-GRAY TO BLUE-
GREEN CLAY;
Comments : BASALT DARK GRAY;
Vesicles : Size(mm): TO 3 Percent: 1-2
Location: Filling: COMBINE
FILLED EITHER BY GREEN SMEC OR BY WHITE ZEOL
NEEDLES AROUND A CALCITE CORE;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): TO 3
OLIVINE
Groundmass : APHANITIC TO HYALOPILITIC;
Replacement: CALCITE
Minerals Replaced: PLAG
ZEOLITE
Minerals Replaced: PLAG
SOME WHITE ZEOL NEEDLES;
SMECTITE
Minerals Replaced: OL
GREEN SMEC;
CELADONITE ( 1-2%)
Size(mm): TO 3
Minerals Replaced: OL
Leg : 51 Top/Bottom Interval(mm): 0/1040 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 199.54
Core: 22 Top of Core Depth (m) : 198.50
Sect: 1 Top of Section Depth(m): 198.50
LITHOLOGY: SEDIMENT;
Leg : 51 Top/Bottom Interval(mm): 1250/1320 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 199.82
Core: 22 Top of Core Depth (m) : 198.50
Sect: 1 Top of Section Depth(m): 199.75
LITHOLOGY: SEDIMENT;
Leg : 51 Top/Bottom Interval(mm): 0/ 200 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 199.77
Core: 22 Top of Core Depth (m) : 198.50
Sect: CC Top of Section Depth(m): 199.67
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1 (1-4), 2 (6-9), 3 (10-13);
Texture : PHYRIC;
Structure : BASALTIC PEBBLES;
Alteration : MOD
PLAG PHENOS COMPLETELY ALTERED,CONCENTRIC
MARGINALLY YELLOW ALTERATION OF PCE 1,PCE 2 IS
COMPLETELY ALTERED,PCE 3 ALTERED TO BROWN-
YELLOWISH COLOR ON ONE SIDE;
Comments : GNDMASS GRAY;
Vesicles : Size(mm): 1-3 Percent: 5-8
Location: Filling: ZEOL,CALCITE
DOUBLE FILLED WITH AN OUTER RING OF WHITE NEEDLES
OF ZEOL,CALCITE CENTER;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): 1
IDIOMORPHIC,COMPLETELY ALTERED;
Replacement: ZEOLITE
Minerals Replaced: OL
CALCITE
Minerals Replaced: OL
Leg : 51 Top/Bottom Interval(mm): 0/ 430 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 208.43
Core: 23 Top of Core Depth (m) : 208.00
Sect: 1 Top of Section Depth(m): 208.00
LITHOLOGY: SEDIMENT;
Leg : 51 Top/Bottom Interval(mm): 450/1220 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 209.22
Core: 23 Top of Core Depth (m) : 208.00
Sect: 1 Top of Section Depth(m): 208.45
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 1A (45-49), 1B (50-54), 2 (56-58), 3 (60-63),
4 (65-71), 5 (74-78), 6 (80-85), 7 (90-98),
8 (100-114), 9 (116-121);
Texture : PHYRIC,MICROLITIC TO APHANITIC,MANY WITH FINE-
GRAINED APHYRIC CHILLED MARGINS;
Structure : CRACKS & VEINS PRESENT;
Alteration : SLIGHTLY
BASALT ALTERED TO YELLOW-BROWN NEAR CRACKS &
MARGINS;
Comments : BASALT DARK GRAY,THIN MN CRUST IN PCE 1A;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 3-10%)
Size(mm): TO 4
MAFIC ( 2%)
Size(mm): 2
MAFIC PHENOS REPLACED BY SMEC & CELAD;
Groundmass : APHANITIC TO MICROLITIC,<2MM IN SIZE;
Replacement: CALCITE
Minerals Replaced: PLAG
ZEOLITE
Minerals Replaced: PLAG
CLAY
Minerals Replaced: PLAG
SMECTITE
PALAGONITE (TRACE%)
PCE 1A;
CELADONITE ( 2%)
Size(mm): TO 2
ID CELAD UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 300/1420 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 218.92
Core: 24 Top of Core Depth (m) : 217.50
Sect: 1 Top of Section Depth(m): 217.80
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 3 (32-38), 4 (43-47), 5 (49-66), 6A (68-91),
6B (91-129), 7 (131-142);
Texture : PHYRIC,MINOR PALAG BRECCIA COMPOSED OF STRONGLY
ALTERED BASALT FRAGMENTS(LOCALLY AUTOBRECCIATED) IN
A MATRIX TO CLEAR GREEN PALAG & SMEC & CELAD & ZEOL,
BRECCIA IN PCE 7 CONTAINS NATIVE COPPER;
Structure : NUMEROUS CRACKS & VEINS-SOME CALCITE FILLED;
Alteration : SLIGHTLY
PCES 3-5,TOP 17CM OF PCE 6A & BOTTOM HALF OF PCE
6A;
EXTENSIVELY
BOTTOM 5CM OF PCE 6A & TOP HALF OF PCES 6B+7,
ALTERED TO YELLOW-GREEN OR PALE BROWN NEAR
MARGINS,ALTERATION OFTEN ONE-SIDED ALONG VEINS
FILLED WITH CALCITE;
Comments : BASALT DARK GRAY;
Vesicles : LOCAL VESICLES FILLED BY CALCITE & SMEC & ZEOL;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): TO 3
MAFICS ( 0%)
Replacement: CALCITE
SMECTITE
VESICLES,MATRIX;
CELADONITE
VESICLES,MATRIX;
ZEOLITE
VESICLES,MATRIX;
PALAGONITE
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 220.48
Core: 24 Top of Core Depth (m) : 217.50
Sect: 2 Top of Section Depth(m): 219.00
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (0-12), 2 (14-21), 3 (23-32), 4A (35-42),
4B (42-51), 5A (52-64), 5B (64-73), 5C (74-80),
5D (80-86), 6A (88-93), 6B (91-93), 6C (93-100),
6D (100-126), 7 (128-137), 8 (139-148);
Texture : PALAG BRECCIA CONSISTING OF BASALT FRAGMENTS & GLASS
ALTERED TO BANDED GREEN MATERIAL,MINOR RED
ALTERATION PRODUCTS ALSO PRESENT;
Structure : PILLOW BASALT,RIMS & VEINS FILLED WITH CALCITE &
CLAY & ZEOL PRESENT,IN PCE 4 FRAGMENTS OF GREEN
MATERIAL ARE PRESENT IN VEINS;
Alteration : SLIGHTLY
MARGINS ALTERED TO GRAY-BROWN & YELLOW-BROWN OR
TO A DEPTH OF 15MM;
Comments : DARK GRAY BASALT,IN PCE 4 THE MARGINS OF THE VEINS
ARE STAINED BY HEMA;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE (TO 10%)
Size(mm): TO 4
MAFICS ( 0%)
Groundmass : MICROLITIC TO APHANITIC;
Replacement: CALCITE
CLAY
ZEOLITE
Leg : 51 Top/Bottom Interval(mm): 0/1390 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 221.89
Core: 24 Top of Core Depth (m) : 217.50
Sect: 3 Top of Section Depth(m): 220.50
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (0-7), 2A (11-37), 2B (38-44), 2C (45-50),
3 (57-68), 4 (68-76), 5 (77-88), 6 (91-109),
7 (113-120), 8 (122-134);
Texture : PHYRIC,MICROLITIC TO APHANITIC,PCES 2B & 2C CONTAIN
BRECCIAS COMPOSED OF FRAGMENTS OF PALAGONIZED GLASS,
CEMENTED BY CALCITE(SMEC & ZEOL?),THE FRAGMENTS TEND
TO BE ELONGATED PARALLEL TO BASALT CHILL MARGINS;
Structure : PILLOW BASALT,THIN(1-2MM) VEINLETS FILLED WITH
CALCITE & CLAY & ZEOL(?) ARE PRESENT IN PCES 2C+3+5+
6+8,IN PCE 6 SOME VEINLETS HAVE BLACK RIMS;
Alteration : EXTENSIVELY
PCES 2B-3 & TOP OF PCE 6;
SLIGHTLY
REMAINDER OF SECTION,ALTERED TO LIGHT GRAY-BROWN
OR YELLOW-BROWN,IN PCE 5 THE CALCITE FILLED VEINS
HAVE PALE ALTERATION HALOES 10-20MM WIDE;
Comments : DARK GRAY BASALT,MARGINS DARK GRAY TO DEPTH OF
2-3MM;
Vesicles : Size(mm): Percent: 0
NOT PRESENT EXCEPT IN PCE 8(TO 1%);
Phenocrysts: PLAGIOCLASE (TO 10%)
Size(mm): TO 2
MAFIC
Size(mm): TO 2
PCE 8 SMALL AMOUNT,NOT PRESENT ELSEWHERE;
Replacement: CALCITE
SMECTITE
ID SMEC UNCERTAIN;
ZEOLITE
CLAY
Leg : 51 Top/Bottom Interval(mm): 0/1490 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 223.49
Core: 24 Top of Core Depth (m) : 217.50
Sect: 4 Top of Section Depth(m): 222.00
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (3-23), 2 (26-38), 3 (43-55), 4 (58-71),
5 (76-93), 6 (95-111), 7 (113-148);
Texture : PHYRIC,MICROLITIC,CHILL MARGINS PRESENT,PCE 2
COMPOSED IN PART OF PALAG BRECCIA;
Structure : PILLOW BASALT,VEINLETS FILLED WITH CALCITE & CLAY &
HEMA(?);
Alteration : MOD
GNDMASS ALTERED TO GRAY-BROWN & YELLOW-BROWN &
DARK BROWN IN 2CM THICK ALTERATION HALOES ALONG
VEINS & CHILL MARGINS,PLAG ALTERED;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( <10%)
Size(mm): <4
MAFIC ( <5%)
Size(mm): <1
Replacement: CALCITE
CLAY
HEMATITE
ID HEMA UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 0/1500 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 225.00
Core: 24 Top of Core Depth (m) : 217.50
Sect: 5 Top of Section Depth(m): 223.50
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (0-26), 2 (28-33), 3 (35-41), 4 (43-50),
5 (52-58), 6 (60-70), 7 (72-82), 8 (84-92),
9 (93-102), 10 (104-111), 11 (114-120),
12 (121-131), 13 (134-150);
Texture : PHYRIC,MICROLITIC TO APHANITIC,CHILLED MARGINS
PRESENT;
Structure : PILLOW BASALT,VEINS FILLED WITH CALCITE & HEMA;
Alteration : SLIGHTLY
PCES 1+6+7+11-13;
MOD
PCES 8-10;
EXTENSIVELY
PCES 3-5;
GNDMASS ALTERED TO GREEN & GRAY-BROWN & YELLOW-
BROWN & DARK BROWN IN PATCHES & HALOES(2CM WIDE)
ALONG VEINS & CHILL MARGINS;
Comments : VEINS FORM LOCAL INTRUSIVE BRECCIAS,GNDMASS GRAY;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( <10%)
Size(mm): <2
MAFIC ( <10%)
Size(mm): <3
Replacement: CALCITE
HEMATITE
ID HEMA UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 0/1500 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 228.50
Core: 25 Top of Core Depth (m) : 227.00
Sect: 1 Top of Section Depth(m): 227.00
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (0-5), 2 (6-14), 3 (15-23), 4 (24-31),
7 (53-68), 9A (81-92), 9B (92-101);
Texture : PHYRIC,CHILLED MARGINS PRESENT;
Structure : PILLOW BASALT,HIGHLY FRACTURED,PCE 3 COMPOSED IN
PART OF PALAG,PCE 7 HAS VEINS OF CARB,PCES 9A-9B
HAVE VEINS FILLED WITH CALCITE & GREEN SMEC;
Alteration : SLIGHTLY
GNDMASS ALTERED TO YELLOW-BROWN & BROWN ALONG
CHILL MARGINS;
Comments : SOME VEINS IN PCE 7 HAVE HEMATIZED MARGINS;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( <10%)
Size(mm): <3
MAFIC ( <5%)
Size(mm): <1
Replacement: CARBONATE
SMECTITE
CALCITE
HEMATITE
Leg : 51 Top/Bottom Interval(mm): 0/1500 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 228.50
Core: 25 Top of Core Depth (m) : 227.00
Sect: 1 Top of Section Depth(m): 227.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCES 5 (34-38), 6 (41-50), 8 (71-79), 10 (102-112),
11 (114-121), 12 (123-131), 13 (134-141),
14 (142-149);
Texture : APHYRIC,CHILLED MARGINS,EXTREMELY SMALL PHENOS,PCE
14 COMPOSED IN PART OF PALAG,STRONGLY ZONED WITH
BANDS OF GREEN PALAG & CELAD(?) & SMEC(HEMA?);
Structure : VEINS OF CARB IN PCES 5(PERPENDICULAR TO CHILL
MARGIN) +6+8+10+12,PCE 11 CALCITE VEIN,MANY VEINS
LINED WITH HEMA OR RED-BROWN SMEC;
Alteration : MOD
Comments : PCE 6 SIGN OF HEMATIZATION ALONG MARGIN,MORE
INTRUSIVE HEMATIZATION ALONG VEINLET IN PCE 8,PCE 12
HEMATIZATION ALONG CARB VEINS,BASALT IS LIGHT
YELLOW-GRAY;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE
EXTREMELY SMALL PHENOS OF PLAG & MAFIC MINERAL;
Replacement: CALCITE
SMECTITE
CELADONITE
ID CELAD UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 0/ 100 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 228.60
Core: 25 Top of Core Depth (m) : 227.00
Sect: 2 Top of Section Depth(m): 228.50
LITHOLOGY: PALAGONITE;
Piece No. : PCE 1 (3-7);
Structure : RED VEINLET THROUGH PCE;
Alteration : MOD
Comments : COLOR BROWN TO GREEN;
Vesicles : Size(mm): Percent: 0
Leg : 51 Top/Bottom Interval(mm): 100/ 400 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 228.90
Core: 25 Top of Core Depth (m) : 227.00
Sect: 2 Top of Section Depth(m): 228.60
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 2 (11-16), 3 (19-21), 4 (24-27), 5 (32-39);
Texture : PHYRIC;
Structure : THIN CALCITE-FILLED VEIN IS PRESENT IN PCE 2;
Alteration : MOD
GNDMASS ALTERED TO GRAY-GREEN & GRAY-BROWN &
YELLOW-BROWN;
Comments : GRAY GNDMASS;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE
MAFIC
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: MAFICS
CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/1450 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 237.95
Core: 26 Top of Core Depth (m) : 236.50
Sect: 1 Top of Section Depth(m): 236.50
LITHOLOGY: PLAG MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (2-7), 2 (10-15), 3 (13-28), 4A (30-48),
4B (47-51), 5 (54-57), 6 (59-74), 7 (76-81),
8 (84-87), 9 (89-94), 10 (96-112), 11 (115-118),
12A (120-128), 12B (128-145);
Texture : MOD PHYRIC,MICROLITIC TO APHANITIC,CHILLED MARGINS;
Structure : CALCITE-FILLED VEINS COMMON;
Alteration : SLIGHTLY
INTERVAL 75-105,REMAINING SECTION MOSTLY FRESH-
SLIGHT ALTERATION OCCURRING IN PCES 4A+4B,GRAY
BASALT ALTERED TO GRAY-BROWN ALONG PILLOW MARGINS;
Comments : INTERPILLOW BRECCIA COMPOSED OF CLASTS PARTIALLY
ALTERED TO PALAG & SMEC IN A BANDED GREEN MATRIX OF
PALAG & SMEC & HEMA & ZEOL(?),GRAY BASALT;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 2-5%)
MAFIC ( <5%)
INCLUDES CPX & OL REPLACED BY SMEC;
Replacement: SMECTITE
Minerals Replaced: MAFICS
CALCITE
PALAGONITE
HEMATITE
ZEOLITE
ID ZEOL UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 0/1450 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 239.45
Core: 26 Top of Core Depth (m) : 236.50
Sect: 2 Top of Section Depth(m): 238.00
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (1-18), 2 (20-35), 3 (37-60), 4 (62-75),
5 (77-88), 6 (86-89), 7 (91-93), 8 (96-97),
9A (100-103), 9B (104-108), 9C (108-112),
9D (111-114), 10 (116-123), 11 (125-128),
12 (130-136), 13 (138-145);
Texture : PHYRIC,MICROLITIC TO APHANITIC,CHILLED MARGINS &
PALAG BRECCIA PRESENT;
Structure : INTERVAL 0-70CM PROBABLY REPRESENTS A SINGLE PILLOW,
VEINS FILLED BY CALCITE & SMEC & HEMA;
Alteration : SLIGHTLY
INTERVAL 0-72CM;
MOD
INTERVAL 72-145CM,BASALT ALTERED TO GRAY-BROWN
ALONG MARGINS,MAFIC PHENOS VARIABLY ALTERED TO
CLAY & ZEOL;
Comments : BASALT GRAY,BRECCIA COMPOSED OF ALTERED PLAG PHYRIC
BASALT IN A CEMENTED MATRIX OF PALAG & SMEC & ZEOL &
CELAD(?) & CALCITE & HEMA OR LIM(?);
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE
MAFIC ( 5-10%)
Size(mm): <1
COMMON IN PCES 12+13;
Replacement: SMECTITE
Minerals Replaced: GLASS
CALCITE
PALAGONITE
HEMATITE
ZEOLITE
CLAY
CELADONITE
ID CELAD UNCERTAIN;
LIMONITE
ID LIM UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 0/ 900 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 240.40
Core: 26 Top of Core Depth (m) : 236.50
Sect: 3 Top of Section Depth(m): 239.50
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (2-5), 2 (8-13), 3 (20-25), 4 (27-36),
5A (38-43), 5B (43-46), 6 (47-50), 7 (52-56),
8 (58-62), 9 (64-70), 10 (70-81), 11 (83-90);
Texture : PHYRIC,MICROLITIC TO APHANITIC,MATRIX OF GREEN PALAG
BRECCIA;
Structure : PILLOW BASALT,VEINLETS IN PCES 1+6 FILLED WITH
CALCITE & SMEC;
Alteration : MOD
BASALT ALTERED IN PATCHES TO YELL0W-BROWN,MARGINS
SLIGHTLY HEMATIZED;
Comments : BRECCIA COMPOSED OF SMALL FRAGMENTS OF ALTERED
BASALT IN A MATRIX OF PALAG & SMEC & CALCITE &
CELAD(?) & MINOR HEMA(?);
Vesicles : Size(mm): Percent: <10
Location: Filling: COMBINE
INCLUDING VUGS UP TO 10MM LONG,COMMON IN PCES 6+
8-10,FILLED PARTLY OR ENTIRELY BY OPAL & SMEC &
CALCITE & ZEOL(?) IN VARYING COMBINATIONS BUT
USUALLY WITH OPAL LININGS & A CALCITE CORE,IN
LARGER VUGS OPAL IS PRESENT AS SMALL(0.2MM) BLUE-
GRAY SPHERES;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <2
MAFIC ( <5%)
Size(mm): <2
Replacement: CALCITE
SMECTITE
OPAL
PALAGONITE
ZEOLITE
ID ZEOL UNCERTAIN;
CELADONITE
ID CELAD UNCERATIN;
HEMATITE
ID HEMA UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 900/1400 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 240.90
Core: 26 Top of Core Depth (m) : 236.50
Sect: 3 Top of Section Depth(m): 240.40
LITHOLOGY: PHYRIC BASALT;
Piece No. : PCES 12A (91-104), 12B (104-125), 12C (125-140);
Texture : PHYRIC;
Structure : FRACTURED,VEINS PRESENT;
Alteration : SLIGHTLY
BASALT ALTERED TO YELLOW-BROWN ALONG VEINS;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( TO 5%)
Size(mm): TO 0.5
MAFIC ( 15%)
Size(mm): TO 1.5
Comments : BASALT IS GRAY TO GRAY-VIOLET;
Leg : 51 Top/Bottom Interval(mm): 900/1400 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 240.90
Core: 26 Top of Core Depth (m) : 236.50
Sect: 3 Top of Section Depth(m): 240.40
LITHOLOGY: PHYRIC BASALT;
Piece No. : PCES 12A (91-104), 12B (104-125), 12C (125-140);
Texture : PHYRIC;
Structure : FRACTURED,VEINS PRESENT;
Alteration : SLIGHTLY
BASALT ALTERED TO YELLOW-BROWN ALONG VEINS;
Leg : 51 Top/Bottom Interval(mm): 0/1500 Analyst: Sinton, J.
Hole: 417A Sample Midpoint (m) : 242.50
Core: 26 Top of Core Depth (m) : 236.50
Sect: 4 Top of Section Depth(m): 241.00
LITHOLOGY: PYX-PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (2-15), 2 (16-25), 3 (25-33), 4A (34-46),
4B (45-50), 5 (51-55), 6 (56-61), 7 (63-71),
8 (73-76), 9 (77-88), 10 (90-100), 11 (101-114),
12A (115-119), 12B (119-140), 12C (140-145);
Texture : PHYRIC,MICROLITIC,HYALOCLASTIC(?) BRECCIA COMPOSED
OF HIGHLY ALTERED BASALT FRAGMENTS;
Structure : VEINS FILLED BY CALCITE & SMEC,CALCITE-FILLED
VEINS LOCALLY MICROBRECCIATED;
Alteration : SLIGHTLY
INTERVAL 0-30CM;
MOD
INTERVAL 30-150CM,BASALT ALTERED TO YELLOW-BROWN,
PLAG PHENOS LARGELY REPLACED BY KSPAR & CLAY,
BRECCIA DISPLAYS SPHEROIDAL WEATHERING IN A GREEN
MATRIX OF PALAG & SMEC & CALCITE & ZEOL(?) & HEMA;
Vesicles :
Location: Filling: CALCITE
CALCITE-FILLED VESICLES LOCALLY COALESCE TO FORM
NETWORK VEINS;
Location: Filling: SMEC,CALCITE,ZEOL
AMYGDULES,ID ZEOL UNCERTAIN(ANAL &/OR CELAD?)
Phenocrysts: PYROXENE ( <10%)
Size(mm): <3
PLAGIOCLASE ( 5-10%)
Size(mm): <1.5
Replacement: SMECTITE
CALCITE
ZEOLITE
ID ZEOL UNCERTAIN;
CLAY
KFELDSPAR
CELADONITE
ID CELAD UNCERTAIN;
ANAL
HEMATITE
ID HEMA UNCERTAIN;
PALAGONITE
Leg : 51 Top/Bottom Interval(mm): 0/ 530 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 243.03
Core: 26 Top of Core Depth (m) : 236.50
Sect: 5 Top of Section Depth(m): 242.50
LITHOLOGY: PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (1-9), 2 (11-19), 3 (21-30), 4 (33-42),
5 (45-48), 6 (50-53);
Texture : PHYRIC,MICROLITIC TO APHANITIC;
Structure : PILLOW BASALT;
Alteration : SLIGHTLY
BASALT DARK GRAY,ALTERED TO GRAY-VIOLET & YELLOW-
BROWN,MAFIC PHENOS REPLACED BY SMEC;
Vesicles : Size(mm): Percent: 0
Size(mm): Percent: TO 10
Location: Filling: CALCITE,SMEC
FILLED AMYGDULES INCREASE IN SIZE FROM 1-2MM
IN PCE 1 TO 10MM IN PCES 4-6;
Phenocrysts: MAFIC ( 10%)
Size(mm): <0.5
PLAGIOCLASE ( 5-10%)
Size(mm): <0.5
Replacement: SMECTITE
Minerals Replaced: MAFICS
CALCITE
Leg : 51 Top/Bottom Interval(mm): 530/ 830 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 243.33
Core: 26 Top of Core Depth (m) : 236.50
Sect: 5 Top of Section Depth(m): 243.03
LITHOLOGY: VOLCANICLASTIC BRECCIA;
Piece No. : PCES 7 (56-64), 8 (65-73), 9 (74-78), 10 (79-83);
Texture : VOLCANICLASTIC BRECCIA COMPOSED OF ALTERED FRAGMENTS
OF BASALT IN A GREEN MATRIX OF PALAG & SMEC &
CALCITE & MINOR HEMA;
Structure : CALCITE & HEMA VEINS PRESENT;
Alteration : MOD
Comments : HEMA PRESENT ALONG OUTERMOST SURFACE OF BASALT
FRAGMENTS,PCE 9 CONTAINS A LARGE INCLUSION OF CELAD;
Replacement: HEMATITE
CALCITE
SMECTITE
PALAGONITE
Leg : 51 Top/Bottom Interval(mm): 830/1400 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 243.90
Core: 26 Top of Core Depth (m) : 236.50
Sect: 5 Top of Section Depth(m): 243.33
LITHOLOGY: PLAG PHYRIC BASALT;
Piece No. : PCES 11 (85-130), 12 (132-140);
Texture : PHYRIC,CHILL MARGINS PRESENT;
Structure : CALCITE-FILLED VEINLETS;
Alteration : SLIGHTLY
TOP OF PCE 11 MOD ALTERED,BASALT ALTERED YELLOW-
BROWN;
Comments : BASALT GRAY;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): TO 7
MAFIC ( 10%)
Size(mm): TO 2
Leg : 51 Top/Bottom Interval(mm): 0/ 600 Analyst: Sinton, J.
Hole: 417A Sample Midpoint (m) : 244.60
Core: 26 Top of Core Depth (m) : 236.50
Sect: 6 Top of Section Depth(m): 244.00
LITHOLOGY: PYX-OL-PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (1-8), 2 (10-19), 3 (21-31), 4 (32-45),
5 (47-51), 6 (54-60);
Texture : PHYRIC,PCE 1 IS FINE-GRAINED,PCES 2-6 ARE MORE
COARSE-GRAINED WITH MINOR BRECCIA;
Structure : PILLOW BASALT,PCE 1 CUT BY CALCITE VEINS,PCES 2-6
CONTAIN 1-3MM CALCITE-FILLED AMYGDULES;
Alteration : MOD
PCE 1;
SLIGHTLY
PCES 2-6,PX PHENOS REPLACED BY SMEC,OL PHENOS
POSSIBLY REPLACED BY IDDINGS;
Comments : MINOR BRECCIA IN PCE 1;
Phenocrysts: PYROXENE ( 15%)
Size(mm): 1-4
OLIVINE ( 1-2%)
Size(mm): 1-2
OL UNCERTAIN;
PLAGIOCLASE ( <2%)
Size(mm): <1
Replacement: SMECTITE
Minerals Replaced: PYX
OLIVINE
Minerals Replaced: IDDINGS
CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/1500 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 247.50
Core: 27 Top of Core Depth (m) : 246.00
Sect: 1 Top of Section Depth(m): 246.00
LITHOLOGY: PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (0-7), 2 (9-13), 3 (15-20), 4 (21-27),
5 (29-32), 6 (35-38), 7 (41-52), 8 (54-58),
9 (62-65), 10 (68-73), 11A (75-80), 11B (75-80),
12 (82-89), 13 (91-96), 14 (98-110), 15 (111-123),
16 (125-133), 17 (135-150);
Texture : PHYRIC,MINOR PALAG BRECCIA;
Structure : PILLOW BASALT;
CALCITE VEINLETS IN PCE 7;
Alteration : MOD
PCES 1+2;
SLIGHTLY
PCES 3-17,BASALT ALTERED TO YELLOW-BROWN,RED-BROWN
ALONG MARGINS,MAFIC PHENOS REPLACED BY SMEC;
Comments : BASALT DARK GRAY,BRECCIA IN PCES 1-6 COMPOSED OF
FRAGMENTS OF ALTERED BASALT IN GREEN MATRIX OF PALAG
& SMEC & CELAD(?) & CALCITE CUT BY NETWORK OF HEMA
OR RED SMEC(?),MATRIX BANDED IN GREEN & VIOLET;
Vesicles : Size(mm): TO 5 Percent: 25
Location: Filling: CALCITE,ZEOL,SMEC
AMYGDULES(PRESENT THROUGHOUT) INCREASE IN SIZE &
QUANTITY DOWNWARD TO NEARLY 5MM & 25% IN PCE 15 &
SOME INNER CORES OF CALCITE & ZEOL & ALL ARE FILLE
BY SMEC,AMYGDULES DECREASE IN PCE 16;
Phenocrysts: MAFIC ( 15%)
Size(mm): <2
IN PCE 1,INCREASING DOWNWARD;
MAFIC (20-25%)
Size(mm): 4-5
IN PCE 15;
PLAGIOCLASE
PHENOS DECREASE IN PCE 16;
Replacement: SMECTITE
CLAY
Minerals Replaced: PLAG
CALCITE
Minerals Replaced: PLAG
ZEOLITE
PALAGONITE
HEMATITE
CELADONITE
ID CELAD UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 0/ 350 Analyst: Sinton, J.
Hole: 417A Sample Midpoint (m) : 247.85
Core: 27 Top of Core Depth (m) : 246.00
Sect: 2 Top of Section Depth(m): 247.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCES 1 (3-12), 2 (15-21), 3 (22-34);
Texture : PHYRIC,MICROLITIC;
Structure : VEINS FILLED BY CALCITE IN PCE 1;
Alteration : SLIGHTLY
Vesicles : Size(mm): TO 4 Percent:
Location: Filling: CALCITE,SMEC
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): 3
OLIVINE ( 1-2%)
Groundmass : GRAINSIZE VARIABLE;
Replacement: CLAY
Minerals Replaced: PLAG
SMECTITE
IDDINGSITE
Minerals Replaced: OL
IDDINGS QUESTIONABLE;
Leg : 51 Top/Bottom Interval(mm): 0/1440 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 256.94
Core: 28 Top of Core Depth (m) : 255.50
Sect: 1 Top of Section Depth(m): 255.50
LITHOLOGY: PLAG-PYX-OL PHYRIC BASALT;
Piece No. : PCES 1 (0-8), 2 (10-15), 3 (18-23), 4 (24-28),
5 (30-34), 6A (36-39), 6B (40-42), 10A (124-134),
10B (134-137), 11 (140-144);
Texture : PHYRIC,BASALT IN BRECCIA;
Structure : VEINLETS FILLED BY CALCITE;
Alteration : MOD
PCES 1-6+11;
SLIGHTLY
PCES 10A-10B,BASALT FRAGMENTS ALTERED TO YELLOW-
GRAY & GRAY-BROWN & YELLOW-BROWN,CONTACT WITH
BRECCIA ALTERED RED-BROWN;
Comments : BRECCIA COMPOSED OF GREEN PALAG & SMEC & CELAD(?) &
CALCITE & MINOR HEMA;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <1
COMBINATION ( 5%)
Size(mm): <0.3
PYX & OL;
Replacement: SMECTITE
Minerals Replaced: PYX,OL
CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/1440 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 256.94
Core: 28 Top of Core Depth (m) : 255.50
Sect: 1 Top of Section Depth(m): 255.50
LITHOLOGY: PHYRIC BASALT;
PILLOW BASALT;
Piece No. : 7 (44-55), 9A (81-87), 9B (88-122);
Texture : PHYRIC,CHILL MARGINS AT 45 & 130CM;
Structure : SINGLE PILLOW,AMYGDULES TO 5MM IN PCES 7-9 FILLED BY
SMEC & CELAD(?) & CALCITE,VEINLETS FILLED BY CALCITE
& SMEC;
Alteration : SLIGHTLY
BASALT ALTERED TO YELLOW-GRAY IN PCE 7,MAFIC
PHENOS REPLACED BY SMEC;
Phenocrysts: MAFIC ( 10%)
Size(mm): <3
PLAGIOCLASE ( 5%)
Size(mm): <2
Replacement: SMECTITE
CALCITE
CELADONITE
ID CELAD UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 258.48
Core: 28 Top of Core Depth (m) : 255.50
Sect: 2 Top of Section Depth(m): 257.00
LITHOLOGY: PLAG PHYRIC BASALT FRAGMENTS;
PILLOW BASALT;
Piece No. : PCES 1 (0-21), 2 (23-35), 3 (36-412), 4 (43-49),
5 (51-55), 6 (58-61), 7 (64-69), 8 (70-79),
9 (81-86), 10A (90-97), 10B (97-103), 11 (105-112),
12 (115-127), 13 (130-136), 14 (139-148);
Texture : PHYRIC;
Structure : BASALT FRAGMENTS CEMENTED BY GREEN PALAG MATRIX,
PILLOW BASALT,LOCAL AMYGDULES <10% & <5MM FILLED BY
CALCITE & SMEC,CALCITE VEINS ABUNDANT;
Alteration : MOD
BASALT ALTERED TO YELLOW-BROWN & BROWN ALONG
MARGINS,BASALT SURFACES IN CONTACT WITH CALCITE DO
NOT SHOW BROWN ALTERATION(PCES 8-9);
Comments : MATRIX COMPOSED OF SMALL BROWN BASALT FRAGMENTS &
PARTICLES OF GREEN SPHEROIDALLY-ZONED PALAG & SMEC
AFTER GLASS & CEMENTED BY CALCITE & HEMA;
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): <2
Replacement: SMECTITE
Minerals Replaced: GLASS
CALCITE
PALAGONITE
Minerals Replaced: GLASS
Leg : 51 Top/Bottom Interval(mm): 0/1500 Analyst: Sinton, J.
Hole: 417A Sample Midpoint (m) : 260.00
Core: 28 Top of Core Depth (m) : 255.50
Sect: 3 Top of Section Depth(m): 258.50
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (1-15), 1B (14-95), 2A (97-113),
2B (113-130), 3 (132-150);
Texture : PHYRIC,THE 1ST TWO PILLOWS AT 0-95CM & 98-130CM ARE
CHILLED ON BOTH TOP & BOTTOM WITH MINOR BRECCIA AT
EITHER END;
Structure : INDIVIDUAL OR PARTS OF PILLOWS AT INTERVALS 0-95CM &
97-130CM & 132-150CM,AMYGDULES RARE IN CENTERS OF
PILLOWS BUT INCREASE OUTWARD ESPECIALLY TOWARD TOPS
WHERE THEY MAY REACH 5MM IN DIAMETER,VEINS IN
PCE 2 FILLED BY CALCITE;
Alteration : SLIGHTLY
AT MIDDLE OF PILLOWS;
MOD
AT ENDS OF PILLOWS;
Comments : PILLOWS OXIDIZED AT MARGINS,INTERPILLOW BRECCIA
COMPOSED OF ALTERED BASALT CLASTS IN GREEN MATRIX OF
SMEC & PALAG & CALCITE & HEMA;
Vesicles :
Location: Filling: SMEC
FILLED AMYGDULES;
Phenocrysts: PLAGIOCLASE
Size(mm): 5-6
AT CENTERS OF PILLOWS;
PLAGIOCLASE
Size(mm): 1-2
AT EITHER END OF PILLOWS,MAFIC PHENOS ARE
SUBORDINATE;
Replacement: CALCITE
SMECTITE
PALAGONITE
HEMATITE
Leg : 51 Top/Bottom Interval(mm): 0/1460 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 261.46
Core: 28 Top of Core Depth (m) : 255.50
Sect: 4 Top of Section Depth(m): 260.00
LITHOLOGY: PLAG-PYX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (2-56), 2 (60-63), 3 (61-93), 4 (96-109),
5 (110-125), 6 (127-145);
Texture : PHYRIC,PILLOWS HAVE CHILL MARGINS & MINOR GREEN
BRECCIA;
Alteration : SLIGHTLY
1-2CM YELLOW-GRAY ALTERATION HALO ALONG MARGIN,
HALO BROWN ADJACENT TO MARGIN,PLAG PHENOS STRONGLY
ALTERED;
Comments : BASALT GRAY;
Vesicles : Size(mm): 6 Percent: 10
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <5
PYROXENE ( <5%)
Size(mm): <2
Replacement: SMECTITE
Minerals Replaced: PLAG,PYX
CALCITE
Minerals Replaced: PLAG
ZEOLITE
Minerals Replaced: PLAG
Leg : 51 Top/Bottom Interval(mm): 0/1500 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 263.00
Core: 28 Top of Core Depth (m) : 255.50
Sect: 5 Top of Section Depth(m): 261.50
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (0-50), 2 (52-54), 3 (56-77), 4A (79-82),
4B (84-88), 5 (89-93), 6 (105-112), 7 (114-136),
8 (138-148);
Texture : PHYRIC,MICROLITIC TO APHANITIC,CHILL MARGINS,
CEMENTED INTERPILLOW BRECCIA,RIM 3MM THICK;
Structure : PILLOW BASALT,VEINLETS OF CALCITE TEND TO BE
PERPENDICULAR TO CHILL MARGINS;
Alteration : SLIGHTLY
BASALT ALTERED TO PALE BROWN NEAR MARGINS,RIM
REMAINS GRAY;
Comments : BASALT DARK GRAY,BRECCIA CONSISTS OF SMALL ALTERED
BASALT CLASTS IN MATRIX OF GREEN PALAG & SMEC COATED
BY HEMA & CEMENTED BY CALCITE;
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC,CALCITE,ZEOL
LOCAL AMYGDULES <1% FILLED;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
MAFIC ( 5%)
Size(mm): <2
Replacement: SMECTITE
CALCITE
Minerals Replaced: PLAG
ZEOLITE
PALAGONITE
HEMATITE
Leg : 51 Top/Bottom Interval(mm): 0/ 850 Analyst: Sinton, J.
Hole: 417A Sample Midpoint (m) : 263.85
Core: 28 Top of Core Depth (m) : 255.50
Sect: 6 Top of Section Depth(m): 263.00
LITHOLOGY: PLAG-PYX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (0-20), 2 (22-34), 3 (35-42), 4 (45-60),
5 (62-83);
Texture : PHYRIC,MICROLITIC PILLOW MARGINS & INTERPILLOW
BRECCIA IN PCES 2+4-5;
Structure : PILLOW BASALT,CALCITE-FILLED VEINS IN PCES 4+5;
Alteration : MOD
Comments : BRECCIA COMPOSED OF ALTERED BASALT CLASTS IN A
MATRIX OF GREEN SMEC & CALCITE & ZEOL;
Vesicles : Size(mm): TO 6 Percent:
AMYGDULES;
Phenocrysts: PLAGIOCLASE
PYROXENE
Groundmass : MICROLITIC,GRAINSIZE DECREASE TOWARD MARGINS IN
PCES 2+4-5;
Replacement: CALCITE
SMECTITE
ZEOLITE
Leg : 51 Top/Bottom Interval(mm): 0/1380 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 266.38
Core: 29 Top of Core Depth (m) : 265.00
Sect: 1 Top of Section Depth(m): 265.00
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (3-16), 2 (20-28), 3 (30-39), 4 (41-56),
5 (59-79), 6 (81-125), 7 (127-138);
Texture : PHYRIC,PILLOW MARGINS & INTERPILLOW BRECCIA PRESENT;
Structure : PILLOW BASALT,THIN CALCITE-FILLED VEINS PRESENT
BUT SCARCE;
Alteration : MOD
ESPECIALLY AT TOPS OF PCES 2+4-5,BASALT ALTERED TO
YELLOW-BROWN IN 1-2CM THICK HALO ALONG CHILL
MARGIN,OUTERMOST 1-2CM ALTERED DARK BROWN,PLAG
PHENOS STRONGLY ALTERED;
Comments : BASALT DARK GRAY,TRACES OF GREEN INTERPILLOW BRECCIA
PRESENT ALONG MARGINS;
Vesicles : Size(mm): 1-3 Percent: RARE
Location: Filling: CALCITE,CELAD
FILLED SCARCE AMYGDULES,ID CELAD UNCERTAIN;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <1
DECREASE IN SIZE & NUMBER TOWARD MARGINS,ALTERED;
Replacement: CALCITE
CLAY
Minerals Replaced: PLAG
ZEOLITE
Minerals Replaced: PLAG
CELADONITE
ID ZEOL & CELAD UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 267.97
Core: 29 Top of Core Depth (m) : 265.00
Sect: 2 Top of Section Depth(m): 266.50
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (3-42), 2 (45-48), 3 (52-78), 4A (80-100),
4B (100-108), 5 (111-121), 6 (124-135), 7 (138-147);
Texture : PHYRIC,CHILL MARGINS & INTERPILLOW BRECCIA;
Structure : PILLOW BASALT,VEINS FILLED WITH CALCITE;
Alteration : SLIGHTLY
Comments : DARK GRAY BASALT GRADES TO PALE BROWN,DARK BROWN
BASALT FRAGMENTS IN GREEN MATRIX OF PALAG & SMEC &
CELAD(?) CEMENTED BY CALCITE;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <6
INCREASE IN SIZE DOWNWARD;
Replacement: CALCITE
PALAGONITE
SMECTITE
CELADONITE
ID CELAD UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 269.47
Core: 29 Top of Core Depth (m) : 265.00
Sect: 3 Top of Section Depth(m): 268.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (2-24), 2A (21-46), 2B (46-66), 3 (68-78),
4 (80-86), 5 (89-106), 6 (108-131), 7 (132-147);
Texture : PHYRIC,CHILL MARGINS WITH TRACES OF INTERPILLOW
BRECCIA COAT PILLOW MARGINS;
Structure : PILLOWS,CALCITE-FILLED VEINS RARE,A LARGE CAVITY
BETWEEN 128-135CM IS FILLED BY DARK GREEN TO BLACK
SMEC;
Alteration : MOD
PCES 3-4 ESPECIALLY ALTERED,PLAG PHENOS COMPLETELY
ALTERED;
Comments : TRACES OF INTERPILLOW BRECCIA PRESENT;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <6
COMBINATION ( 5-10%)
CPX & OL,PHENOS DECREASE IN SIZE(TO <1MM) & NUMBER
NEAR MARGINS;
Groundmass : GRAINSIZES SHOW A COMPLIMENTARY VARIATION;
Replacement: ZEOLITE
Minerals Replaced: PLAG
ID ZEOL UNCERTAIN;
SMECTITE
Minerals Replaced: CPX,OL
CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/1350 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 270.85
Core: 29 Top of Core Depth (m) : 265.00
Sect: 4 Top of Section Depth(m): 269.50
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (2-11), 2A (14-20), 2B (19-27), 3 (31-46),
4 (49-61), 5 (73-79), 6 (81-89), 7 (91-105),
8 (108-117), 9 (120-126), 10 (129-133);
Texture : PHYRIC,CEMENTED INTERPILLOW BRECCIA & CHILLED
MARGINS PRESENT,AGGS OF ZEOL XTLS ON CHILLED BASALT
SURFACES IN PCE 9;
Structure : PILLOW BASALT,THIN(<1MM) CALCITE-FILLED VEINLETS &
CAVITIES WITH AGGS OF ZEOL(?) XTLS PRESENT;
Alteration : MOD
BASALT ALTERED TO YELLOW-BROWN NEAR MARGINS & TO
DARK BROWN WITHIN 3MM OF MARGIN;
Comments : DARK GRAY BASALT,BRECCIA COMPOSED OF HIGHLY ALTERED
BASALT FRAGMENTS IN A GREEN TO RED-BROWN MATRIX
PALAG & SMEC & CELAD(?) & HEMA CEMENTED BY CALCITE;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <2
PLAG PHENOS INCREASE IN SIZE TO AS MUCH AS 5MM
(AVERAGE 2MM) IN PILLOW INTERIORS(PCE 4) PARTIALLY
ALTERED TO CALCITE & CLAY;
MAFIC ( 5%)
Size(mm): <2
REPLACED BY SMEC;
Replacement: SMECTITE
Minerals Replaced: PLAG
ZEOLITE
PALAGONITE
HEMATITE
CELADONITE
CALCITE
Minerals Replaced: PLAG
CLAY
Minerals Replaced: PLAG
Leg : 51 Top/Bottom Interval(mm): 0/1460 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 272.46
Core: 29 Top of Core Depth (m) : 265.00
Sect: 5 Top of Section Depth(m): 271.00
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (2-12), 2 (14-23), 3 (25-33), 4 (34-55),
5 (56-62), 6 (70-79), 7 (80-91), 8 (93-102),
9 (105-117), 10 (120-129), 11 (132-146);
Texture : PHYRIC,MINOR INTERPILLOW BRECCIA & CHILLED MARGINS
PRESENT;
Structure : PILLOW BASALT,INTERVALS 0-35+35-80+80-120+120-146CM
REPRESENT INDIVIDUAL PILLOWS OR PARTS OF PILLOWS,
CALCITE VEINS NORMAL TO PILLOW MARGINS,CRACKS
NORMAL TO THE MARGIN ARE FILLED BY GREEN TO BROWN
PALAG MATERIAL &/OR CALCITE;
Alteration : SLIGHTLY
BASALT ALTERED TO YELLOW-BROWN & FINALLY TO DARK
BROWN WITHIN 2CM & 2MM (RESPECTIVELY) OF MARGINS
ADJACENT TO GREEN BRECCIA;
Comments : GRAY BASALT,PCES 1+3+4+9+10 CONTAIN INTERPILLOW
BRECCIAS COMPOSED OF GREEN TO BROWN SMEC & PALAG &
MINOR HEMA IN THE FORM OF DELICATE ELONGATED SHARDS
PARALLEL TO PILLOW MARGINS;
Vesicles : AMYGDULES SCARCE-FILLED WITH NONCALCAREOUS WHITE
MATERIAL;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <6
PHENOS DECREASE IN SIZE & NUMBER,STRONGLY ALTERED
TO ZEOL;
Groundmass : GNDMASS BECOMES APHANITIC NEAR MARGINS;
Replacement: ZEOLITE
Minerals Replaced: PLAG
CALCITE
SMECTITE
PALAGONITE
HEMATITE
Leg : 51 Top/Bottom Interval(mm): 0/1500 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 274.00
Core: 29 Top of Core Depth (m) : 265.00
Sect: 6 Top of Section Depth(m): 272.50
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (2-20), 1B (20-41), 1C (41-67), 1D (67-85),
2A (90-110), 2B (110-138), 3 (140-150);
Texture : PHYRIC,MICROLITIC & GRADES TO APHANITIC NEAR PILLOW
MARGINS,TRACE OF INTERPILLOW BRECCIA & CHILLED
MARGINS;
Structure : PILLOW BASALT,INTERVAL 90-150CM PROBABLY REPRESENTS
ONE PILLOW,CALCITE-FILLED VEINS TO 3MM WIDE ARE
COMMON;
Alteration : SLIGHTLY
BASALT ALTERED TO LIGHT GRAY NEAR PILLOW MARGINS
IN PCES 1D+3;
Comments : DARK GRAY BASALT,PCE 5 CONTAINS TRACES OF GREEN
CEMENTED INTERPILLOW BRECCIA;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <6
PARTIALLY ALTERED TO CLAY & CALCITE IN PCES 1B-2B
AT PILLOW INTERIORS;
MAFIC ( <5%)
Size(mm): <2
ALTERED TO SMEC & IDDINGS,PHENOS DECREASE IN SIZE
NUMBER;
Replacement: CLAY
Minerals Replaced: PLAG
CALCITE
Minerals Replaced: PLAG
SMECTITE
IDDINGSITE
Leg : 51 Top/Bottom Interval(mm): 0/ 500 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 274.50
Core: 29 Top of Core Depth (m) : 265.00
Sect: 7 Top of Section Depth(m): 274.00
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (2-20), 2 (22-42), 3 (44-50);
Texture : PHYRIC,CHILLED MARGINS PRESENT;
Structure : PILLOW BASALT,PCE 1 CONTAINS A SMALL NUMBER OF
CALCITE-FILLED VEINS NORMAL TO CHILLED MARGINS;
Alteration : SLIGHTLY
MOD AT TOP OF PCE 1,BASALT ALTERED TO YELLOW-GRAY
& TO GREEN & DARK BROWN WITHIN 1CM & 1MM
(RESPECTIVELY) OF MARGIN;
Comments : GRAY BASALT;
Vesicles : AMYGDULES SCARCE FILLED WITH NON-CALCAREOUS WHITE
MATERIAL;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <5
ALTERED TO ZEOL;
Groundmass : APHANITIC NEAR MARGIN(0-25CM),MICROLITIC IN PILLOW
INTERIOR(BELOW 25CM);
Replacement: ZEOLITE
Minerals Replaced: PLAG
CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/1450 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 275.95
Core: 30 Top of Core Depth (m) : 274.50
Sect: 1 Top of Section Depth(m): 274.50
LITHOLOGY: BASALTIC BRECCIA;
Piece No. : PCES 1 (5-10), 2 (13-18), 3 (20-29), 4A (32-40),
4B (40-52), 5 (55-65), 6A (66-80), 6B (80-90),
6C (88-94), 7A (95-103), 7B (104-109), 8 (112-116),
9 (120-131), 10 (134-145);
Texture : VOLCANIC BRECCIA CONTAINING STRONGLY ALTERED BASALT
FRAGMENTS IN A GREEN PALAG MATRIX,2MM THICK DARK
BROWN CRUST;
Structure : VEINS & CAVITIES FILLED BY CALCITE;
Alteration : MOD
BASALT ALTERED NEAR MARGINS TO PALE BROWN & BROWN;
Comments : BASALT FRAGMENTS ARE ROUNDED & EXHIBIT CRACKED CHILL
MARGINS,MATRIX COMPOSED OF GLASS FRAGMENTS
COMPLETELY ALTERED TO PALAG IN A FINE-GRAINED SELF-
MATRIX;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <2
LARGELY REPLACED;
MAFIC ( 5%)
Size(mm): <2
Groundmass : APHANITIC;
Replacement: CALCITE
PALAGONITE
Leg : 51 Top/Bottom Interval(mm): 0/1150 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 277.15
Core: 30 Top of Core Depth (m) : 274.50
Sect: 2 Top of Section Depth(m): 276.00
LITHOLOGY: BASALTIC BRECCIA;
Piece No. : PCES 1 (7-12), 2A (15-22), 2B (21-32), 3A (33-40),
3B (40-61), 3C (61-70), 4 (71-80), 5 (81-86),
6 (87-106), 7 (107-110);
Texture : VOLCANIC BRECCIA CONTAINING STRONGLY ALTERED BASALT
FRAGMENTS IN A GREEN PALAG MATRIX,2MM THICK DARK
BROWN CRUST;
Structure : CALCITE-FILLED AMYGDULES & CAVITIES(TO 1CM) PRESENT
BUT UNCOMMON;
Alteration : MOD
Comments : BASALT FRAGMENTS ROUNDED,EXHIBIT CHILLED MARGINS,
ELONGATED GREEN PALAG SHARDS ARE BEING DETACHED FROM
BASALT FRAGMENTS PARALLEL TO THEIR MARGINS,ALL
TRANSITIONS VISIBLE FROM PALAG RIMS STILL ATTACHED
TO THE BASALT TO SHARDS ENTIRELY SEPARATED FROM
"MOTHER" PILLOW,DETACHED SHARDS IN SELF-MATRIX OF
FINELY GRANULATED(1-2MM) PALAG FRAGMENTS CEMENTED
BY CALCITE,LARGER FRAGMENTS HAVE THIN BROWN MARGINS,
PERLITIC INTERNAL STRUCTURE;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <1
Groundmass : APHANITIC;
Replacement: CALCITE
PALAGONITE
Minerals Replaced: GLASS
CLAY
Minerals Replaced: PLAG
Leg : 51 Top/Bottom Interval(mm): 0/1060 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 278.56
Core: 30 Top of Core Depth (m) : 274.50
Sect: 3 Top of Section Depth(m): 277.50
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (3-44), 1B (45-57), 2 (60-106);
Texture : PHYRIC,CHILLED MARGINS AT 5+60+105CM,TRACES OF GREEN
PALAG BRECCIA ARE FORMED AT TOP OF PCE 1A;
Structure : PILLOW BASALT,CALCITE-FILLED VEINS COMMON;
SLIGHTLY
% DARK GRAY BASALT ALTERD TO GRAY-BROWN WITHIN
2-10CM OF MARGINS & TO DARK BROWN WITHIN 1CM OF RIM;
Comments : DARK GRAY BASALT;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
AVERAGE 2MM;
MAFIC ( 5%)
Size(mm): TO 2
Groundmass : APHANITIC;
Replacement: CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/1430 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 280.43
Core: 30 Top of Core Depth (m) : 274.50
Sect: 4 Top of Section Depth(m): 279.00
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (1-36), 2A (40-62), 2B (62-72), 3 (75-78),
4 (82-89), 5 (94-97), 6 (103-110), 7 (114-120),
8 (123-134), 9 (137-148);
Texture : PHYRIC,PALAG BRECCIA & CHILLED MARGINS;
Structure : PILLOW BASALT,VEINS FILLED BY CALCITE & CELAD(?) &
SOFT YELLOW-BROWN MATERIAL,VEINS NORMAL TO PILLOW
MARGIN IN PCE 8 CONTAIN SMALL AMYGDULES FILLED BY
ZEOL & CLAY;
Alteration : SLIGHTLY
INTERNAL 0-80CM;
MOD
INTERVAL 80-143CM,GRAY BASALT ALTERED TO YELLOW-
BROWN NEAR MARGINS & TO BROWN WITHIN 2-3MM OF
PILLOW RIMS;
Comments : GRAY BASALT,BRECCIA IN PCES 3-9 COMPOSED OF ALTERED
BASALT CLASTS IN A GREEN MATRIX OF PALAG & SMEC &
CELAD(?) & CALCITE;
Phenocrysts: MAFIC ( 15%)
Size(mm): <0.5
PLAGIOCLASE ( 10%)
Size(mm): <3
PARTIALLY REPLACED BY CLAY,PHENOS IN LARGE
FRAGMENT IN PCE 8 ENTIRELY REPLACED BY GRAY-GREEN
TO WHITE CLAY.MIN;
Groundmass : GLASS
ENTIRELY PALAGONITIZED;
Replacement: CLAY MINERALS
Minerals Replaced: PLAG
PALAGONITE
Minerals Replaced: GLASS
CALCITE
CELADONITE
ID CELAD UNCERTAIN;
ZEOLITE
SMECTITE
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 281.97
Core: 30 Top of Core Depth (m) : 274.50
Sect: 5 Top of Section Depth(m): 280.50
LITHOLOGY: BASALTIC BRECCIA;
PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (2-14), 1B (14-22), 2 (24-32), 3 (35-44),
4 (46-52), 5 (55-72), 6 (74-88), 7 (90-96),
8 (98-109), 9 (111-120), 10A (128-132),
10B (132-138), 11 (141-147);
Texture : PHYRIC,GNDMASS DEVITRIFIED,FRAGMENTS HAVE ROUNDED
CHILLED MARGINS,2MM THICK OUTER CRUST GRAY TO DARK
BROWN;
Structure : FRAGMENTS HAVE MANY CALCITE-FILLED CRACKS;
Alteration : MOD
DARK GRAY BASALT GRADES TO YELLOW-BROWN & PALE
BROWN TOWARD MARGINS;
Comments : DARK GRAY BASALT,BRECCIA ABUNDANT COMPOSED OF
ALTERED BASALT FRAGMENTS IN A GREEN MATRIX OF PALAG
GLASS FRAGMENTS & SMEC & CALCITE;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <2
OLIVINE ( 3%)
Size(mm): <7
Replacement: KFELDSPAR
Minerals Replaced: PLAG
IDDINGSITE
Minerals Replaced: OL
CALCITE
CELADONITE
Minerals Replaced: OL
SMECTITE
Leg : 51 Top/Bottom Interval(mm): 0/1340 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 283.34
Core: 30 Top of Core Depth (m) : 274.50
Sect: 6 Top of Section Depth(m): 282.00
LITHOLOGY: BASALTIC BRECCIA;
PLAG PHYRIC BASALT;
Piece No. : PCES 1 (0-6), 2 (8-19), 3 (23-31), 4 (35-44),
5 (45-51), 6 (54-59), 7 (61-68), 8 (71-85),
9 (88-95), 10 (96-106), 11 (109-118), 12 (121-134);
Texture : VOLCANIC BRECCIA CONTAINING FRAGMENTS OF ALTERED
PHYRIC BASALT IN A PALAG-HYALOCLASTIC MATRIX;
Structure : PCES 9-12 CONTAIN CALCITE-FILLED VEINS;
Alteration : MOD
BASALT FRAGMENTS ALTERED TO YELLOW-GRAY & YELLOW-
BROWN WITH DARK RED-BROWN RIMS;
Comments : GREEN BRECCIA MATRIX COMPOSED OF PALAG & SMEC &
CELAD(?) CEMENTED BY CALCITE;
Vesicles :
Location: Filling: CALCITE,CLAY,ZEOL
SMALL FILLED AMYGDULES,LARGE AMYGDULES IN PCE 2
FILLED BY WHITE ZEOL HAVING LAMELLAR XTLS;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <4
COMPLETELY REPLACED BY WHITE TO GRAY-GREEN CLAYS;
Groundmass : GLASS
COMPLETELY PALAGONITIZED;
Replacement: CLAY
Minerals Replaced: PLAG
WHITE TO GRAY-GREEN CLAY;
CALCITE
ZEOLITE
PALAGONITE
Minerals Replaced: GLASS
CELADONITE
ID CELAD UNCERTAIN;
SMECTITE
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 285.48
Core: 31 Top of Core Depth (m) : 284.00
Sect: 1 Top of Section Depth(m): 284.00
LITHOLOGY: PLAG MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (0-23), 1B (23-29), 2 (30-46), 3 (49-52),
4A (54-65), 4B (64-70), 4C (67-75), 5 (77-89),
6A (91-96), 6B (96-104), 7 (105-109), 8 (110-114),
9 (115-119), 10A (121-125), 10B (126-132),
11A (135-140), 11B (140-148);
Texture : PHYRIC WITH HYALOCLASTITE BRECCIA;
Structure : PILLOW BASALT,VEINLETS FILLED BY CALCITE & SMEC;
Alteration : SLIGHTLY
INTERVAL 0-80CM;
MOD
INTERVAL 80-148CM,ALTERED TO YELLOW-BROWN NEAR
MARGINS;
Comments : BRECCIA COMPOSED OF ALTERED BASALT FRAGMENTS IN A
MATRIX OF CALCITE(PCE 3) OR A GREEN MATRIX OF PALAG
& SMEC & CALCITE & HEMA(PCES 4A+5-11B),BASALT
FRAGMENTS IN PCES 4-11 OFTEN HAVE HEMA RIMS;
Vesicles : AMYGDULES ARE ABUNDANT IN PCES 5-11;
Phenocrysts: PLAGIOCLASE ( 7-10%)
Size(mm): <2
ALTERED TO CLAY;
MAFIC ( 5%)
Size(mm): <3
PHENOS ABUNDANT IN PCES 5-11(10%,<1MM);
Groundmass : GLASS
COMPLETELY PALAGONITIZED;
Replacement: CLAY
Minerals Replaced: PLAG
CALCITE
SMECTITE
PALAGONITE
Minerals Replaced: GLASS
HEMATITE
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 286.98
Core: 31 Top of Core Depth (m) : 284.00
Sect: 2 Top of Section Depth(m): 285.50
LITHOLOGY: BASALTIC BRECCIA;
PLAG MOD PHYRIC BASALT;
Piece No. : PCES 1 (2-5), 2A (8-12), 2B (13-15), 3 (13-23),
4 (30-35), 5 (36-43), 6 (45-48), 7 (51-55),
8 (60-64), 9 (65-80), 10A (81-87), 10B (87-93),
11 (95-97), 12 (99-103), 13 (105-109),
14A (111-116), 14B (115-148);
Texture : VOLCANIC BRECCIA COMPOSED OF ANGULAR TO ROUNDED
FRAGMENTS OF MOD PHYRIC BASALT,FRAGMENTS HAVE
CHILLED MARGINS;
Alteration : MOD
ROUNDED FRAGMENTS ALMOST ENTIRELY ALTERED TO GREEN
OR BROWN PALAG IN A SELF-MATRIX OF PALAG;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): TO 2
MAFIC PHENOS MINOR;
Groundmass : GLASSY,MATRIX COMPOSED OF FINE GRAINS OF GREEN
SMEC & PALAG CEMENTED BY CALCITE;
Replacement: PALAGONITE
SMECTITE
CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/ 670 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 287.67
Core: 31 Top of Core Depth (m) : 284.00
Sect: 3 Top of Section Depth(m): 287.00
LITHOLOGY: BASALTIC BRECCIA;
Piece No. : PCES 1 (3-6), 2 (9-11), 3 (13-20), 4 (21-31),
5 (34-37), 7 (52-60), 8 (62-67);
Texture : VOLCANIC BRECCIA COMPOSED OF FRAGMENTS OF BASALT;
Alteration : MOD
MOST BASALT FRAGMENTS COMPLETELY ALTERED TO PALAG;
Comments : SOME FRAGMENTS STRONGLY HEMATIZED;
Groundmass : GREEN SELF-MATRIX OF PALAG & SMEC & CELAD(?) &
CALCITE & ZEOL;
Replacement: PALAGONITE
HEMATITE
SMECTITE
CELADONITE
ID CELAD UNCERTAIN;
CALCITE
ZEOLITE
Leg : 51 Top/Bottom Interval(mm): 400/1470 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 288.47
Core: 31 Top of Core Depth (m) : 284.00
Sect: 3 Top of Section Depth(m): 287.40
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 6 (40-50), 9 (70-72), 10 (76-86), 11 (89-96),
12A (99-108), 12B (108-121), 13 (124-148);
Texture : PHYRIC,TRACES OF INTERPILLOW BRECCIA,APHANITIC TO
MICROXTLLINE;
Structure : PILLOW BASALT,VEINLETS FILLED BY CALCITE & ZEOL &
MINOR CLAY;
Alteration : SLIGHTLY
GRAY-VIOLET BASALT ALTERED TO YELLOW-BROWN NEAR
MARGINS & DARK BROWN ALONG BOUNDARIES WITH
BRECCIA;
Comments : GRAY-VIOLET BASALT,PCE 11 COMPOSED LARGELY OF
CALCITE;
Vesicles : Size(mm): TO 3 Percent:
Location: Filling: CALCITE,ZEOL,SMEC
AMYGDULES FILLED BY SMEC & YELLOW-TO-WHITE ZEOL &
MINOR CALCITE;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <1.5
MAFIC ( 15%)
Size(mm): <1
Groundmass : MAGNETITE
ID MAGN UNCERTAIN,PCES 12+13 RICH IN TINY XTLS;
UNALTERED NEXT TO CALCITE-FILLED VEINLETS;
Replacement: SMECTITE
ZEOLITE
YELLOW TO WHITE;
CALCITE
CLAY
Leg : 51 Top/Bottom Interval(mm): 0/1350 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 289.85
Core: 31 Top of Core Depth (m) : 284.00
Sect: 4 Top of Section Depth(m): 288.50
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (2-19), 2 (22-28), 3A (30-42), 3B (42-49),
4 (52-64), 5 (66-75), 6 (79-88), 7 (92-100),
8 (103-112), 9 (115-130);
Texture : PHYRIC,MINOR INTERPILLOW BRECCIA,APHANITIC TO
MICROXTLLINE;
Structure : PILLOW BASALT,VEINLETS FILLED BY CALCITE;
Alteration : SLIGHTLY
ALTERED LOCALLY TO YELLOW-GRAY ALONG MARGINS &
VEINS;
Comments : GRAY BASALT WITH A PINK CAST DUE TO INITIAL
FRAGMENTS OF BASALT ALTERED TO PALAG & SMEC IN A
MATRIX OF CALCITE;
Vesicles :
Location: Filling: CLAY,CELAD,QTZ
FILLED AMYGDULES,ID CELAD UNCERTAIN;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <4
MAFIC ( 15%)
Size(mm): <0.5
Replacement: CLAY
CELADONITE
ID CELAD UNCERTAIN;
CALCITE
QUARTZ
SMECTITE
PALAGONITE
Leg : 51 Top/Bottom Interval(mm): 0/1440 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 291.44
Core: 31 Top of Core Depth (m) : 284.00
Sect: 5 Top of Section Depth(m): 290.00
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (2-30), 1B (30-35), 2A (35-37), 2B (38-47),
2C (46-57), 2D (58-63), 2E (63-81), 3A (85-90),
3B (90-110), 3C (110-132), 4 (136-144);
Texture : PHYRIC,MINOR INTERPILLOW BRECCIA,APHANITIC TO
MICROXTLLINE;
Structure : PILLOW BASALT,VEINLETS FILLED BY CALCITE & MINOR
ZEOL;
Alteration : SLIGHTLY
PCES 2A-2D MORE MOD ALTERED,GRAY-VIOLET BASALT
ALTERED TO GRAY-BROWN ALONG CRACKS & YELLOW-BROWN
NEAR MARGINS,PILLOW RIMS ALTERED TO RED-BROWN
AGAINST BRECCIA;
Comments : GRAY-VIOLET BASALT,BRECCIA COMPOSED OF ELONGATE
FRAGMENTS OF BASALT ALIGNED PARALLEL TO PILLOW RIMS
IN A GREEN MATRIX OF PALAG & SMEC & CELAD(?) & HEMA
& MINOR CALCITE;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <4
MAFIC ( 15%)
Size(mm): <2
Replacement: CALCITE
ZEOLITE
PALAGONITE
SMECTITE
HEMATITE
CELADONITE
ID CELAD UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 0/1140 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 292.64
Core: 31 Top of Core Depth (m) : 284.00
Sect: 6 Top of Section Depth(m): 291.50
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (1-23), 2 (26-50), 3A (53-63), 3B (64-70),
4 (72-83), 5 (85-93), 6 (97-103), 7 (106-114),
3B (90-110), 3C (110-132), 4 (136-144);
Texture : PHYRIC,APHANITIC TO MICROXTLLINE;
Structure : PILLOW BASALT,VEINLETS FILLED BY CALCITE;
Alteration : SLIGHTLY
GRAY-VIOLET BASALT ALTERED TO YELLOW-BROWN NEAR
MARGINS;
Phenocrysts: PLAGIOCLASE ( <15%)
Size(mm): <4
Replacement: CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/1370 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 294.87
Core: 32 Top of Core Depth (m) : 293.50
Sect: 1 Top of Section Depth(m): 293.50
LITHOLOGY: PLAG MOD PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT;
Piece No. : PCES 1 (1-9), 2A (11-27), 2B (26-41), 3 (45-50),
4A (52-63), 4B (63-65), 5 (68-85), 6 (87-97),
7 (100-106), 8A (108-115), 8B (115-123),
8C (123-137);
Texture : MOD PHYRIC,INTERPILLOW BRECCIA,GNDMASS APHANITIC TO
MICROXTLLINE;
Structure : BASALT PILLOWS,VEINLETS FILLED BY CALCITE +OR- GREEN
& BROWN SMEC(?),VEINLET IN PCE 3 CONTAINS QTZ(?),
CRACKS IN BRECCIA CONTAIN FE.OX;
Alteration : SLIGHTLY
GRAY-VIOLET BASALT ALTERED TO GRAY-BROWN,YELLOW-
BROWN ALONG MARGINS & CRACKS;
Comments : GRAY-VIOLET BASALT,PCES 1-3+7-8 CONTAIN INTERPILLOW
BRECCIA COMPOSED OF ELONGATE FRAGMENTS OF ALTERED
BASALT ORIENTED SUBPARALLEL TO PILLOW MARGINS IN A
LIGHT YELLOW-GREEN MATRIX OF SMEC & CALCITE &
ZEOL(?),PCE 8B CONTAINS INCLUSIONS OF A SOFT PALE
YELLOW-GREEN MINERAL;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <4
INCREASE IN SIZE FROM <2MM IN PCE 1 TO <4MM IN
PCES 4-9;
Replacement: CALCITE
SMECTITE
ID SMEC UNCERTAIN;
QUARTZ
ID QTZ UNCERTAIN;
FERROUS MN OXIDE
ZEOLITE
Leg : 51 Top/Bottom Interval(mm): 0/1380 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 296.38
Core: 32 Top of Core Depth (m) : 293.50
Sect: 2 Top of Section Depth(m): 295.00
LITHOLOGY: PLAG PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT;
Piece No. : PCES 1 (4-20), 2A (22-29), 2B (29-50), 2C (51-63),
3 (69-71), 4A (75-86), 4B (86-96), 4C (96-105),
5 (110-117), 6 (120-130), 7 (135-138);
Texture : PHYRIC,TRACES OF INTERPILLOW BRECCIA,GNDMASS
APHANITIC TO MICROXTLLINE;
Structure : BASALT PILLOWS,INTERVALS 0-20+20-70+70-110+110-135CM
EACH REPRESENT INDIVIDUAL PILLOWS OR PARTS OF
PILLOWS,VEINLETS FILLED BY CALCITE;
Alteration : SLIGHTLY
BASALT IN PCES 1-4 GRAY-VIOLET ALTERED TO YELLOW-
BROWN NEAR MARGINS,BASALT IN PCES 5+6 GRAY ALTERED
TO LIGHT GRAY-BROWN NEAR MARGINS;
Comments : GRAY-VIOLET BASALT,PCE 7 CONSISTS OF INTERPILLOW
BRECCIA COMPOSED OF BASALT FRAGMENTS IN A CALCITE
MATRIX;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <2
MAFIC ( 15%)
Size(mm): <0.5
Replacement: CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/1400 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 297.90
Core: 32 Top of Core Depth (m) : 293.50
Sect: 3 Top of Section Depth(m): 296.50
LITHOLOGY: PLAG PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT;
Piece No. : PCES 1A (3-13), 1B (14-22), 1C (23-28), 2A (31-43),
2B (44-50), 2C (51-57), 3 (60-66), 4 (68-74),
5 (77-86), 6 (90-96), 7A (99-109), 7B (109-113),
8A (121-130), 8B (131-140);
Texture : PHYRIC,PILLOW MARGINS & INTERPILLOW BRECCIA,GNDMASS
APHANITIC TO MICROXTLLINE;
Structure : PILLOW BASALT,VEINLETS FILLED BY CALCITE & GREEN OR
BROWN SMEC(?);
Alteration : SLIGHTLY
GRAY BASALT ALTERED TO LIGHT GRAY-BROWN,YELLOW-
BROWN NEAR MARGINS,PILLOW RIMS BROWN IMMEDIATELY
TO BRECCIA;
Comments : GRAY BASALT,BRECCIA IN PCES 1-3+8 COMPOSED OF
ELONGATE YELLOW-GREEN FRAGMENTS OF ALTERED BASALT
(ORIGINALLY GLASS?) ORIENTED SUBPARALLEL TO PILLOW
MARGINS IN A MATRIX OF CALCITE & ANAL;
Phenocrysts: PLAGIOCLASE ( <10%)
Size(mm): <3
PHENOS RANGE FROM 2% TO 1MM IN PCE 7 TO 10% TO 3MM
IN PCES 1-6+8;
MAFIC ( <10%)
Size(mm): <0.1
PHENOS RANGE FROM 2-3% TO <0.1MM IN PCE 7 TO 10%
TO 1MM IN PCES 1-6+8;
Replacement: CALCITE
SMECTITE
ANAL
ID ANAL UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 0/1450 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 299.45
Core: 32 Top of Core Depth (m) : 293.50
Sect: 4 Top of Section Depth(m): 298.00
LITHOLOGY: PLAG PHYRIC BASALT & VOLCANIC BRECCIA;
PILLOW BASALT;
Piece No. : PCES 1A (2-10), 1B (10-13), 2 (16-19), 3 (20-28),
4A (31-40), 4B (40-50), 5 (53-61), 6A (64-73),
6B (73-79), 7 (82-90), 8A (94-97), 8B (100-105),
9 (106-115), 10A (117-126), 10B (126-130),
11A (132-137), 11B (137-141), 11C (142-145);
Texture : GNDMASS APHANITIC TO MICROXTLLINE,PHYRIC,WELL
PRESERVED CHILLED MARGINS & VOLCANIC BRECCIA;
Structure : PILLOW BASALT,VEINLETS FILLED BY CALCITE WITH
VARYING AMOUNTS OF LIGHT YELLOW OR DARK GREEN
SMEC(?);
Alteration : MOD
PCES 1A-2+7-11C;
SLIGHTLY
PCES 3-6B,FRAGMENTS IN PILLOW MARGINS ALTERED TO
YELLOW-BROWN WITH BROWN HEMATIZED RIMS;
Comments : BRECCIA COMPOSED OF LIGHT GREEN ELONGATED FRAGMENTS
OF ALTERED BASALT OFTEN ATTACHED OR ORIENTED
SUBPARALLEL TO PILLOW MARGINS IN A GREEN TO LIGHT
RED-BROWN MATRIX OF SMEC,THIS BRECCIA IS CUT IN PCE
2 BY A VEIN FILLED BY YELLOW-GREEN
CLAY & CALCITE & ZEOL(?),LARGE GRAIN OF ANAL(?) IS
PRESENT IN PCE 7;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <3
MAFIC ( 15%)
Size(mm): <3
PCES 4-5,LIMITED TO PILLOW MARGINS IN PCE 6;
Replacement: CLAY
CALCITE
ZEOLITE
ID ZEOL UNCERTAIN;
ANAL
ID ANAL UNCERTAIN;
HEMATITE
Leg : 51 Top/Bottom Interval(mm): 0/1500 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 301.00
Core: 32 Top of Core Depth (m) : 293.50
Sect: 5 Top of Section Depth(m): 299.50
LITHOLOGY: BASALTIC BRECCIA;
PLAG MOD PHYRIC BASALT;
Piece No. : PCES 1 (2-6), 2A (9-11), 2B (12-18), 2C (18-27),
3 (29-31), 4 (33-40), 5 (42-45), 6A (46-63),
6B (53-58), 6C (58-65), 7 (67-73), 8 (74-78),
9A (80-90), 9B (90-97), 10 (98-102), 11A (104-112),
11B (111-118), 12 (120-127), 13A (130-136),
13B (135-138), 13C (136-138), 13D (139-143),
14 (145-150);
Texture : VOLCANIC BRECCIA COMPOSED OF ALTERED FRAGMENTS OF
MOD PHYRIC BASALT IN A GREEN PALAG MATRIX,GNDMASS
APHANITIC;
Structure : VEINLETS FILLED WITH CALCITE;
Alteration : MOD
PCES 1-2C;
SLIGHTLY
PCES 3-14,BASALT FRAGMENTS GRAY ALTERED TO YELLOW-
GRAY,SMALLER FRAGMENTS CONCENTRICALLY ZONED WITH
BROWN CORES & GREEN RIMS ALTERED TO PALAG;
Comments : GRAY BASALT FRAGMENTS,BRECCIA MATRIX YELLOW-GREEN TO
DARK GREEN COMPOSED OF PALAG & SMEC & CELAD(?);
Vesicles : PCES 9-14 CONTAIN TINY VESICLES;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <1.5
MAFIC ( <3%)
Size(mm): 2
Replacement: CALCITE
PALAGONITE
SMECTITE
CELADONITE
ID CELAD UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 0/ 700 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 303.70
Core: 33 Top of Core Depth (m) : 303.00
Sect: 1 Top of Section Depth(m): 303.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCES 1 (2-10), 2 (12-35), 3 (37-42), 4 (45-60),
5 (63-70);
Texture : MOD PHYRIC,GNDMASS APHANITIC TO MICROXTLLINE;
Structure : CALCITE-FILLED VEINLETS;
Alteration : SLIGHTLY
VIOLET-GRAY BASALT ALTERED TO GRAY-BROWN ALONG
CALCITE-FILLED VEINS,YELLOW-BROWN NEAR MARGINS;
Comments : VIOLET-GRAY BASALT;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <3
CLINOPYROXENE ( 5%)
Size(mm): <2
OLIVINE
Size(mm): <1
Replacement: CALCITE
Leg : 51 Top/Bottom Interval(mm): 700/1480 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 304.48
Core: 33 Top of Core Depth (m) : 303.00
Sect: 1 Top of Section Depth(m): 303.70
LITHOLOGY: BASALTIC BRECCIA;
Piece No. : PCES 6A (72-76), 6B (77-80), 7 (83-88), 8 (92-100),
9 (102-115), 10 (116-125), 11 (126-131),
12A (133-139), 12B (141-148);
Texture : VOLCANIC BRECCIA,PILLOW MARGINS,BRECCIA COMPOSED OF
FRAGMENTS OF BASALT ALTERED IN PART TO PALAG IN A
GREEN MATRIX OF SMEC & PALAG & CELAD & CALCITE,
PILLOW MARGINS & BRECCIA BOTH CONTAIN HEMA;
Replacement: HEMATITE
PALAGONITE
Leg : 51 Top/Bottom Interval(mm): 0/1450 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 305.95
Core: 33 Top of Core Depth (m) : 303.00
Sect: 2 Top of Section Depth(m): 304.50
LITHOLOGY: BASALTIC BRECCIA;
PLAG MOD PHYRIC BASALT;
Piece No. : PCES 1 (2-10), 2 (12-20), 3A (23-35), 3B (35-47),
4 (51-55), 5A (57-60), 5B (60-66), 6 (68-80),
7 (81-90), 8A (91-94), 8B (96-100), 9 (102-115),
10 (118-128), 11A (131-135), 11B (135-145);
Texture : MOD PHYRIC,GNDMASS APHANITIC,BRECCIA COMPOSED OF
BASALT FRAGMENTS(20%) IN A GREEN PALAG SELF-MATRIX
(80%),DARK GREEN MATRIX COMPOSED OF SMEC & PALAG &
CALCITE & ZEOL(?) & SHARDS OF ALTERED BASALT;
Structure : VEINLETS FILLED BY ZEOL(ANAL?) & BLUE-GREEN SMEC
(PCE 3A) OR BY CALCITE(PCE 3B),THIN VEINS OF HEMA
CUT SMALLER FRAGMENTS;
Alteration : MOD
YELLOW-BROWN BASALT,SMALLER FRAGMENTS ZONED WITH
LIGHT BROWN TO GREEN CORES & BROWN TO DARK GREEN
RIMS;
Vesicles :
Location: Filling: CALCITE,SMEC
SOME VESICLES;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <1
MAFIC ( 2%)
Size(mm): <0.5
PHENOS IN SMALLER FRAGMENTS COMPLETELY ALTERED;
Replacement: CALCITE
SMECTITE
ZEOLITE
ID ZEOL UNCERTAIN(POSSIBLY ANAL);
HEMATITE
Leg : 51 Top/Bottom Interval(mm): 0/1500 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 307.50
Core: 33 Top of Core Depth (m) : 303.00
Sect: 3 Top of Section Depth(m): 306.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT;
Piece No. : PCES 1 (4-7), 2 (11-18), 3 (21-28), 4 (32-36),
5 (39-50), 6 (53-60), 7 (62-74), 8 (76-95),
9 (97-102), 10 (104-107), 11 (109-115),
12A (118-124), 12B (125-130), 13A (131-140),
13B (140-150);
Texture : PHYRIC,PILLOW MARGINS IN PCES 6-7+9+11 NEARLY
APHYRIC,GNDMASS APHANITIC TO MICROXTLLINE,TRACES OF
INTERPILLOW BRECCIA;
Structure : PILLOW BASALT,VEINS FILLED BY CALCITE & SMEC;
Alteration : SLIGHTLY
BASALT GNDMASS LIGHT GRAY,ALTERED TO YELLOW-BROWN;
Comments : PARTIALLY HEMATIZED PILLOW MARGINS,BRECCIA COMPOSED
OF ALTERED BASALT FRAGMENTS IN A GREEN MATRIX OF
SMEC & PALAG(?) & ZEOL & HEMA;
Vesicles : Size(mm): <1 Percent: 5
Phenocrysts: PLAGIOCLASE (10-20%)
Size(mm): <5
OLIVINE ( 5%)
Size(mm): <3
IN PCE 8;
CLINOPYROXENE ( 2%)
Size(mm): <2
IN PCE 8;
Replacement: CALCITE
SMECTITE
PALAGONITE
ID PALAG UNCERTAIN;
ZEOLITE
HEMATITE
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 308.97
Core: 33 Top of Core Depth (m) : 303.00
Sect: 4 Top of Section Depth(m): 307.50
LITHOLOGY: PLAG MOD PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT;
Piece No. : PCES 1 (2-10), 2 (11-18), 3A (21-34), 3B (34-41),
3C (41-49), 3D (50-56), 3E (56-64), 3F (63-75),
4 (77-95), 5 (97-100), 6 (102-116), 7 (119-125),
8 (127-131), 9 (135-140), 10 (143-147);
Texture : MOD PHYRIC,MINOR INTERPILLOW BRECCIA,GNDMASS
APHANITIC TO MICROXTLLINE;
Structure : PILLOW BASALT,VEINS FILLED BY CALCITE;
Alteration : MOD
PCES 1-2+3E-3F+6-10;
SLIGHTLY
PCES 3A-3D+4-5,DARK GRAY BASALT ALTERED TO PALE
BROWN NEAR MARGINS,DARK BROWN ALONG HEMATIZED
RIMS;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
MAFIC ( 1%)
Size(mm): <1
Replacement: CALCITE
HEMATITE
SMECTITE
PALAGONITE
ID PALAG UNCERTAIN;
Comments : BRECCIA COMPOSED OF FRAGMENTS OF ALTERED BASALT IN A
MATRIX OF CALCITE & SMEC & PALAG(?);
Leg : 51 Top/Bottom Interval(mm): 0/1350 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 310.35
Core: 33 Top of Core Depth (m) : 303.00
Sect: 5 Top of Section Depth(m): 309.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT;
Piece No. : PCES 1 (1-11), 2 (14-25), 3 (27-30), 4 (34-44),
5A (49-76), 5B (77-86), 5C (86-108), 6 (114-118),
7 (122-135);
Texture : PHYRIC,INTERVALS 0-8+80-88CM SPARSELY PHYRIC,TRACES
OF INTERPILLOW BRECCIA,APHANITIC TO MICROXTLLINE
GNDMASS;
Structure : PILLOW BASALT,CAVITIES AT 54+119CM LINED BY CALCITE
& ZEOL & FILLED BY DARK GREEN SMEC;
Alteration : MOD
Comments : BRECCIA,COMPOSED OF ALTERED BASALT FRAGMENTS IN A
MATRIX OF CALCITE & SMEC & PALAG(?);
Vesicles : Size(mm): <1 Percent: 1
Phenocrysts: PLAGIOCLASE ( 5-20%)
Size(mm): <5
CLINOPYROXENE ( <5%)
Size(mm): <3
OLIVINE ( <5%)
Size(mm): <0.5
Replacement: CALCITE
SMECTITE
ZEOLITE
PALAGONITE
ID PALAG UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 0/1500 Analyst: Sinton, J.
Hole: 417A Sample Midpoint (m) : 314.00
Core: 34 Top of Core Depth (m) : 312.50
Sect: 1 Top of Section Depth(m): 312.50
LITHOLOGY: PLAG PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT;
Piece No. : PCES 1A (1-11), 1B (11-17), 2A (19-37), 2B (37-40),
3 (42-45), 4A (48-76), 4B (47-49), 4C (80-100),
4D (100-108), 5 (110-122), 6 (124-130), 7 (132-138),
8 (140-150);
Texture : PHYRIC,GNDMASS APHANITIC TO MICROXTLLINE,PCES 1-3
VERY FINE-GRAINED,PCES 5-8 CONTAIN BRECCIA & PILLOW
MARGINS;
Structure : PILLOW BASALT,VEINS FILLED BY CALCITE & SMEC;
Alteration : SLIGHTLY
PCES 1A-4D;
MOD TO EXTENSIVELY
PCES 5-8;
Comments : BRECCIA COMPOSED OF ELONGATED FRAGMENTS OF ALTERED
BASALT ALIGNED PARALLEL TO PILLOW MARGINS IN A GREEN
MATRIX OF SMEC & PALAG(?) & CELAD & CALCITE;
Phenocrysts: PLAGIOCLASE
Size(mm): <8
IN PCES 4-8;
MAFIC
Size(mm): <1
IN PCES 4-8,IN PCES 1-3 SOME MAFIC PHENOS ARE
PSEUDOMORPHS AFTER OL;
Replacement: CALCITE
SMECTITE
CELADONITE
PALAGONITE
ID PALAG UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 315.48
Core: 34 Top of Core Depth (m) : 312.50
Sect: 2 Top of Section Depth(m): 314.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (2-5), 2 (8-22), 3 (24-34), 4 (35-44),
5 (46-52), 6 (54-58), 7 (62-73), 8A (75-95),
9 (115-121), 10 (124-140), 11 (142-148);
Texture : PHYRIC,PILLOW MARGINS,GNDMASS APHANITIC TO
MICROXTLLINE;
Structure : PILLOW BASALT,VEINS FILLED BY CALCITE & LOCALLY BY
SULFIDES(PYR?,PCE 8);
Alteration : SLIGHTLY
DARK GRAY BASALT ALTERED TO PALE BROWN NEAR
HEMATIZED PILLOW MARGINS;
Comments : HEMATIZED PILLOW MARGINS,DARK GRAY BASALT;
Vesicles : PCE 2 CONTAINS FLATTENED VESICLES;
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): 4-8
PCES 1-3;
PLAGIOCLASE ( 5-10%)
Size(mm): 3-5
PLAGIOCLASE ( 15%)
Size(mm): 5-8
PCES 9-11;
CLINOPYROXENE ( 2%)
Size(mm): 2
PCES 1-3+5+7-11;
OLIVINE ( 1-2%)
Size(mm): 2
PCES 4-6+8A-10;
Groundmass : XTLLINE,GRADES TO VITRIC NEAR TOP;
Replacement: CALCITE
HEMATITE
SULFIDES
POSSIBLY PYR;
Leg : 51 Top/Bottom Interval(mm): 0/1440 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 316.94
Core: 34 Top of Core Depth (m) : 312.50
Sect: 3 Top of Section Depth(m): 315.50
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (1-22), 2 (26-53), 3A (54-70), 3B (70-75),
4 (79-88), 5 (94-103), 6A (106-112), 6B (111-118),
7 (120-131), 8 (134-144);
Texture : MOD PHYRIC,GNDMASS APHANITIC;
Structure : CALCITE-FILLED VEINS 1-3MM WIDE IN PCES 1-4 &
PROMINENT NEAR THE TOP OF PCE 6A(106-110CM) & PCE 7
(120-124CM);
Alteration : SLIGHTLY
Vesicles : PCE 8 CONTAINS VESICLES LINED WITH ANAL(?);
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <4
PCES 1-4;
PLAGIOCLASE ( 5-10%)
Size(mm): <5
PCES 5-8;
OLIVINE
PCES 1-4;
Replacement: ANAL
ID ANAL UNCERTAIN;
CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 318.47
Core: 34 Top of Core Depth (m) : 312.50
Sect: 4 Top of Section Depth(m): 317.00
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (3-7), 2 (10-15), 3 (17-22), 4 (23-26),
5 (29-34), 6A (36-51), 6B (52-65), 7 (67-74),
8A (77-91), 8B (92-101), 9A (103-110), 9B (111-120),
10 (123-125), 11 (128-130), 12 (133-136),
13 (140-148);
Texture : MOD PHYRIC;
Structure : PILLOW BASALT,VEINS FILLED BY CALCITE;
Alteration : MOD
Comments : GNDMASS IS GRAY,PCES 10+11 ARE BASALTIC FRAGMENTS;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): 3-5
CLINOPYROXENE ( 2%)
Size(mm): <2
OLIVINE ( 3%)
Size(mm): 2
Replacement: CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/1010 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 319.51
Core: 34 Top of Core Depth (m) : 312.50
Sect: 5 Top of Section Depth(m): 318.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (4-7), 2 (11-20), 3 (26-50), 4 (54-70),
5 (73-93), 6 (95-101);
Texture : PHYRIC;
Structure : PILLOW BASALT,SCARCE CALCITE-FILLED VEINS,MASSIVE;
Alteration : SLIGHTLY
GRAY BASALT ALTERED TO YELLOW-GRAY ALONG VEINS;
Vesicles : Size(mm): TO 3 Percent: TO 10
Location: Filling: CALCITE,ANAL,ZEOL
AMYGDULES LOCALLY COALESCE(AS IN PCE 6) TO FORM
FILLED CAVITIES TO 2CM ACROSS;
Phenocrysts: PLAGIOCLASE ( <12%)
Size(mm): <2
ALTERED TO ANAL(?) & OPAL(?) & WHITE FIBROUS ZEOL;
OLIVINE ( <3%)
Size(mm): 3
ALTERED TO IDDINGS;
CLINOPYROXENE ( 3%)
ALTERD TO SMEC(?);
Replacement: ANAL
Minerals Replaced: PLAG
ID ANAL UNCERTAIN;
OPAL
Minerals Replaced: PLAG
ID OPAL UNCERTAIN;
ZEOLITE
Minerals Replaced: PLAG
IDDINGSITE
Minerals Replaced: OL
SMECTITE
Minerals Replaced: CPX
ID SMEC UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 1010/1470 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 319.97
Core: 34 Top of Core Depth (m) : 312.50
Sect: 5 Top of Section Depth(m): 319.51
LITHOLOGY: HYALOCLASTITE BRECCIA;
Piece No. : PCES 7 (105-109), 8 (111-120), 9 (122-125),
10 (127-132), 11 (135-140), 12 (144-147);
Texture : HYALOCLASTITE BRECCIA WITH MOD PHYRIC,PALAG
FRAGMENTS;
Alteration : SLIGHTLY
Comments : BRECCIA COMPOSED OF FRAGMENTS OF GREEN PALAG GLASS
IN A FINELY GRANULATED(1MM GRAINSIZE) SELF-MATRIX
CEMENTED BY CALCITE & HEMA,EACH FRAGMENT HAS A
SPHERULITIC STRUCTURE COMPOSED OF DELICATE CONCENTRI
ALTERATION ZONES SURROUNDING A CORE OF LARGER BASALT
FRAGMENTS APPEAR TO HAVE BEEN PROGRESSIVELY
GRANULATED IN THE MATRIX;
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 321.47
Core: 34 Top of Core Depth (m) : 312.50
Sect: 6 Top of Section Depth(m): 320.00
LITHOLOGY: PLAG-OL-CPX MOD PHYRIC BASALT & BASALTIC BRECCIA;
PILLOW BASALT;
Piece No. : PCES 1 (2-8), 2 (10-15), 3 (16-24), 4 (25-30),
5 (32-40), 6 (42-56), 7 (58-64), 8 (66-80),
9 (82-89), 10 (92-102), 11 (105-108), 12 (110-118);
13 (121-127), 14 (129-132), 15 (135-147);
Texture : MOD PHYRIC,APHANITIC TO MICROXTLLINE GNDMASS,
VOLCANIC BRECCIA WHICH IS COMPOSED OF FRAGMENTS OF
BASALT IN A MATRIX OF SMEC & PALAG;
Structure : PILLOW BASALT,VEINS & CRACKS FILLED BY CALCITE;
Alteration : MOD
Comments : GNDMASS IS GRAY IN INTERIOR OF PILLOW & GRADES
TOWARD SURFACE YELLOWISH-BROWN COLOR;
Vesicles : Size(mm): Percent: <1
FILLED;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
COMBINATION ( 5%)
Size(mm): 2
OL & CPX,ALL PHENOS NOW PSEUDOMORPHS;
Replacement: CALCITE
SMECTITE
PALAGONITE
Leg : 51 Top/Bottom Interval(mm): 0/ 170 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 321.67
Core: 34 Top of Core Depth (m) : 312.50
Sect: 7 Top of Section Depth(m): 321.50
LITHOLOGY: PLAG-OL-CPX MOD PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (3-17);
Texture : MOD PHYRIC,CHILLED MARGINS BETWEEN 0-7CM,GNDMASS
MICROXTLLLINE;
Structure : PILLOW BASALT,CALCITE-FILLED VEINS NORMAL TO THE
MARGIN ARE PRESENT IN THE TOP PART OF PCE 1;
Alteration : FRESH
GRAY BASALT ALTERED TO YELLOW-GRAY NEAR MARGIN;
Vesicles : Size(mm): <10 Percent: 5-8
Location: Filling: ANAL,CALCITE,ZEOL
AMYGDULES;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): TO 3
LARGELY REPLACED BY WHITE ALTERATION MINERAL,SMALL
TO ABSENT IN MARGIN BUT INCREASES IN BASE OF
PCE 1;
OLIVINE ( 5%)
Size(mm): <2
REPLACED BY IDDINGS;
CLINOPYROXENE ( 1%)
Size(mm): <2
REPLACED BY DARK GREEN SMEC;
Replacement: IDDINGSITE
Minerals Replaced: OL
SMECTITE
Minerals Replaced: CPX
CALCITE
ANAL
UNIDENTIFIED
Minerals Replaced: PLAG
WHITE UNIDENT.MIN;
ZEOLITE
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 323.48
Core: 35 Top of Core Depth (m) : 322.00
Sect: 1 Top of Section Depth(m): 322.00
LITHOLOGY: PLAG-OL-PYX MOD PHYRIC BASALT & BASALTIC BRECCIA;
PILLOW BASALT;
Piece No. : PCES 1 (2-11), 2 (14-22), 3 (26-31), 4 (32-40),
5 (43-45), 6 (48-52), 7 (60-65), 8 (68-81),
9 (83-101), 10A (104-129), 10B (130-140),
11 (142-148);
Texture : MOD PHYRIC,CHILLED MARGINS & VOLCANIC BRECCIA,
GNDMASS APHANITIC TO MICROXTLLINE;
Structure : PILLOW BASALT,VEINS TO 4MM WIDE FILLED BY CALCITE &
SMEC;
Alteration : MOD
GRAY BASALT ALTERED TO PALE BROWN & DARK BROWN
ALONG HEMATIZED MARGINS;
Comments : BRECCIA COMPOSED OF FRAGMENTS OF ALTERED BASALT IN A
FINE-GRAINED GREEN MATRIX OF SMEC & PALAG(?) &
CALCITE;
Vesicles : Size(mm): <1 Percent: <1
ROUNDED TO ELONGATED,PCE 3 CONTAINS A 4MM LONG
FLATTENED VESICLE-THE LONG AXIS OF WHICH DIPS 60
DEGREES WITH RESPECT TO THE CORE;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <3
PCES 1-7;
PLAGIOCLASE ( 10%)
Size(mm): <7
PCES 8-11;
COMBINATION ( 3%)
Size(mm): <2
OL & CPX,REPLACED BY SMEC & IDDINGS;
Replacement: SMECTITE
Minerals Replaced: CPX
HEMATITE
IDDINGSITE
Minerals Replaced: OL
CALCITE
PALAGONITE
ID PALAG UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 0/1440 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 324.94
Core: 35 Top of Core Depth (m) : 322.00
Sect: 2 Top of Section Depth(m): 323.50
LITHOLOGY: PLAG-OL-CPX MOD PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT;
Piece No. : PCES 1A (1-10), 1B (11-19), 2 (20-25), 3 (27-33),
4 (36-41), 5 (43-49), 6 (50-70), 7 (71-90),
8 (90-98), 9 (101-108), 10 (110-118), 11 (121-124),
12 (125-133), 13 (135-144);
Texture : MOD PHYRIC,CHILLED MARGINS & MINOR INTERPILLOW PALAG
BRECCIA,GNDMASS APHANITIC TO MICROXTLLINE;
Structure : PILLOW BASALT,CALCITE-FILLED VEINS ARE SCARCE;
Alteration : MOD
GRAY TO YELLOW-GRAY BASALT ALTERED TO YELLOW-BROWN
& DARK BROWN WITHIN 2CM & 2MM;
Comments : PCES 5+10+12 BRECCIA COMPOSED OF DELICATE ELONGATE
PALAG FRAGMENTS ALIGNED PARALLEL TO PILLOW MARGINS
IN A FINE-GRAINED GREEN SELF-MATRIX,THE LARGER
FRAGMENTS DISPLAY CONCENTRIC ALTERATION ZONES;
Vesicles : Size(mm): TO 6 Percent: 10
Location: Filling: ZEOL,ANAL,
Location: Filling: CALCITE,SMEC
ID SMEC UNCERTAIN,AMYGDULES OFTEN CONCENTRICALLY
LINED WITH ZEOL,ANAL,CALCITE & SMEC(?);
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): 3
LARGELY REPLACED BY ZEOL;
OLIVINE ( 5%)
Size(mm): <4
REPLACED BY RED-BROWN IDDINGS;
CLINOPYROXENE ( 3%)
Size(mm): <2
LATHS,REPLACED BY DARK GREEN SMEC;
Replacement: ZEOLITE
Minerals Replaced: PLAG
IDDINGSITE
Minerals Replaced: OL
SMECTITE
Minerals Replaced: CPX
ANAL
PALAGONITE
CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/1490 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 326.49
Core: 35 Top of Core Depth (m) : 322.00
Sect: 3 Top of Section Depth(m): 325.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (2-17), 2 (20-32), 3 (35-41), 4 (45-48),
5 (52-56), 6 (60-63), 7 (66-68), 8 (71-79),
9A (81-106), 9B (106-117), 10 (122-143),
11 (145-149);
Texture : PHYRIC,APHANITIC GNDMASS;
Structure : PILLOW BASALT,VEINS FILLED BY CALCITE & SMEC(?),PCES
6+8 CONTAIN LARGE(1.5-2.5CM) CAVITIES FILLED BY
TRANSPARENT WHITE ZEOL(?) ON A YELLOW-GREEN LINING;
Alteration : MOD
Comments : GRAY TO GRAY-BROWN BASALT;
Vesicles : Size(mm): Percent: <1
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <4
PCES 1-7;
PLAGIOCLASE ( 10%)
Size(mm): <12
PCES 8-10;
CLINOPYROXENE ( <5%)
Size(mm): <3
OLIVINE ( <3%)
Size(mm): <3
PHENOS LARGELY REPLACED;
Replacement: CALCITE
SMECTITE
ID SMEC UNCERTAIN;
ZEOLITE
WHITE & TRANSPARENT,ID ZEOL UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 327.98
Core: 35 Top of Core Depth (m) : 322.00
Sect: 4 Top of Section Depth(m): 326.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (3-41), 2 (44-46), 3 (50-80), 4 (82-86),
5 (88-90), 6 (94-100), 7 (100-116), 8 (119-136),
9 (138-148);
Texture : PHYRIC,APHANITIC TO MICROXTLLINE GNDMASS;
Structure : PILLOW BASALT,VEINS FILLED BY CALCITE & SMEC(?);
Alteration : MOD
Comments : DARK GRAY BASALT;
Vesicles : Size(mm): <1 Percent: <1
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <8
PCES 1-8;
PLAGIOCLASE ( 10%)
Size(mm): <3
PCE 9;
COMBINATION ( 3%)
Size(mm): <2
OL + CPX, ENTIRELY REPLACED;
Replacement: CALCITE
SMECTITE
ID SMEC UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 329.48
Core: 35 Top of Core Depth (m) : 322.00
Sect: 5 Top of Section Depth(m): 328.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (0-14), 2 (15-30), 3 (33-37), 4 (40-54),
5 (56-74), 6 (76-89), 7 (90-98), 8 (100-118),
9 (120-131), 10 (133-148);
Texture : PHYRIC,APHANITIC TO MICROXTLLINE GNDMASS,CHILLED
MARGINS & INTERPILLOW BRECCIA;
Structure : PILLOW BASALT,MINOR CALCITE VEINS;
Alteration : MOD
GRAY BASALT ALTERED TO YELLOW-BROWN & DARK BROWN
WITHIN 2CM & 2MM(RESPECTIVELY) OF MARGINS AGAINST
BRECCIA;
Comments : PCES 1+7-8 BRECCIAS COMPOSED OF DELICATE ELONGATE
FRAGMENTS OF PALAG ALIGNED PARALLEL TO PILLOW
MARGINS IN A GREEN FINE-GRAINED(TO 1MM) SELF-MATRIX
CONTAINING PALAG & SMEC,THE LARGER(1CM) FRAGMENTS
DISPLAY DELICATE CONCENTRIC ALTERATION ZONES;
Vesicles : Size(mm): 1-6 Percent: 10
Location: Filling: CALCITE,ANAL,
Location: Filling: ZEOL,SMEC
ID SMEC UNCERTAIN,AMYGDULES OFTEN CONCENTRICALLY
LINED WITH CALCITE & ANAL & ZEOL & SMEC;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <4
LARGELY REPLACED BY ZEOL;
OLIVINE ( 5%)
Size(mm): <4
REPLACED BY IDDINGS;
CLINOPYROXENE ( 5%)
Size(mm): <3
BLACK LATHS;
Replacement: ZEOLITE
Minerals Replaced: PLAG
IDDINGSITE
Minerals Replaced: OL
ANAL
SMECTITE
CALCITE
PALAGONITE
Leg : 51 Top/Bottom Interval(mm): 0/ 960 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 330.46
Core: 35 Top of Core Depth (m) : 322.00
Sect: 6 Top of Section Depth(m): 329.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT;
Piece No. : PCES 1A (5-21), 1B (20-31), 1C (31-44), 2 (46-59),
3 (61-69), 4A (71-89), 4B (90-96);
Texture : PHYRIC,CHILLED MARGINS & MINOR INTERPILLOW BRECCIA
(PCES 1C+3+4A),APHANITIC TO MICROXTLLINE GNDMASS;
Structure : BASALT PILLOWS,INTERVALS 0-31+31-70+70-96 REPRESENT
INDIVIDUAL PILLOWS BOUNDED BY HEMATIZED CHILLED
MARGINS,MINOR CALCITE FILLED VEINS NORMAL TO PILLOW
MARGINS;
Alteration : MOD
GRAY BASALT ALTERED TO YELLOW-BROWN & DARK BROWN
WITHIN 2CM & 2MM(RESPECTIVELY) OF MARGINS AGAINST
BRECCIA;
Comments : HEMATIZED CHILLED MARGINS,ALTERED GRAY BASALT;
Vesicles : Size(mm): 1-6 Percent: 5-8
Location: Filling: CALCITE,ANAL
Size(mm): 1-6 Percent: 5-8
Location: Filling: ZEOL,SMEC
AMYGDULES OFTEN CONCENTRICALLY LINED WITH CALCITE
& ANAL & ZEOL & SMEC,ID SMEC UNCERTAIN;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): 5
LARGELY REPLACED BY ZEOL(?);
CLINOPYROXENE ( <5%)
Size(mm): <3
BLACK CPX LATHS;
OLIVINE ( <1%)
Size(mm): <5
REPLACED BY IDDINGS;
Replacement: ZEOLITE
Minerals Replaced: PLAG
HEMATITE
IDDINGSITE
Minerals Replaced: OL
CALCITE
ANAL
SMECTITE
ID SMEC UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 332.98
Core: 36 Top of Core Depth (m) : 331.50
Sect: 1 Top of Section Depth(m): 331.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT;
Piece No. : PCES 1 (2-13), 2 (15-42), 3A (45-55), 3B (55-60),
4 (61-69), 5 (70-86), 6 (88-102), 7 (105-111),
8 (113-125), 9 (127-140), 10 (141-148);
Texture : PHYRIC,CHILLED MARGINS & MINOR INTERPILLOW BRECCIA,
GNDMASS APHANITIC TO MICROLITIC,BRECCIA(PCES 4-6+8+
10) COMPOSED OF ELONGATE FRAGMENTS OF PALAG ALIGNED
PARALLEL TO PILLOW MARGINS IN A GREEN MATRIX OF SMEC
& CALCITE & HEMA & ANAL(?),CONTAINS DISSEMINATED
HEMA;
Structure : PILLOW BASALT,INTERVALS 0-70+70-103+113-148
REPRESENT INDIVIDUAL PILLOWS OR PARTS OF PILLOWS
BOUNDED BY HEMATIZED CHILL MARGINS,MINOR CALCITE-
FILLED VEINS NORMAL TO PILLOW MARGINS;
Alteration : MOD
GRAY TO SLIGHTLY GRAY BASALT ALTERED TO YELLOW &
DARK BROWN WITHIN 2CM & 2MM(RESPECTIVELY) OF
MARGINS AGAINST BRECCIA;
Vesicles :
Location: Filling: SMEC,CALCITE,ZEOL
SCARCE FILLED AMYGDULES;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
LARGELY REPLACED BY ZEOL(?) & CALCITE;
OLIVINE ( 4%)
Size(mm): <5
REPLACED BY IDDINGS;
CLINOPYROXENE ( 1%)
BLACK CPX LATHS ALTERED TO SMEC;
Replacement: ZEOLITE
Minerals Replaced: PLAG
CALCITE
Minerals Replaced: PLAG
IDDINGSITE
Minerals Replaced: OL
SMECTITE
Minerals Replaced: CPX
HEMATITE
PALAGONITE
ANAL
ID ANAL UNCERTAIN;
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 334.47
Core: 36 Top of Core Depth (m) : 331.50
Sect: 2 Top of Section Depth(m): 333.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (2-16), 1B (16-29), 2A (32-45), 2B (45-58),
3 (60-73), 4A (75-86), 4B (86-101), 5 (106-108),
6A (110-120), 6B (120-130), 7 (132-147);
Texture : PHYRIC,FREQUENT CHILLED MARGINS,MICROLITIC;
Structure : PILLOW BASALT,MINOR VEINS FILLED BY CALCITE & SMEC,
PILLOW RIMS GRAY TO DARK GRAY;
Alteration : MOD
DARK GRAY BASALT ALTERED TO PALE BROWN NEAR
MARGINS;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
PARTIALLY ALTERED;
CLINOPYROXENE ( 3%)
Size(mm): <2
ALTERED TO SMEC;
OLIVINE ( 1%)
Size(mm): <2
COMPLETELY ALTERED TO IDDINGS;
Replacement: IDDINGSITE
Minerals Replaced: OL
SMECTITE
Minerals Replaced: CPX
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 335.98
Core: 36 Top of Core Depth (m) : 331.50
Sect: 3 Top of Section Depth(m): 334.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
MASSIVE BASALT,ALTERED;
Piece No. : PCES 1 (2-15), 2 (17-31), 3 (32-40), 4 (41-43),
4A (45-54), 4B (59-70), 5 (71-82), 6 (85-98),
7A (100-112), 7B (112-125), 8 (126-137),
9 (140-142), 10 (143-148);
Texture : PHYRIC,CHILLED MARGINS & MINOR INTERPILLOW BRECCIA,
GNDMASS APHANITIC;
Structure : PILLOW BASALT,MASSIVE,MINOR CALCITE-FILLED VEINS;
Alteration : MOD
GRAY BASALT ALTERED TO YELLOW-GRAY & DARK BROWN
WITHIN 2CM & 2MM(RESPECTIVELY) OF MARGINS AGAINST
BRECCIA;
Comments : BRECCIA(PCES 3+4A+8) COMPOSED OF ELONGATED PALAG
FRAGMENTS(TO 3CM) ALIGNED PARALLEL TO PILLOW MARGINS
IN A GREEN FINE-GRAINED(<1MM) SELF-MATRIX OF PALAG &
SMEC & CALCITE & HEMA,GREEN SMEC ABUNDANT AS
INTERSTITIAL FILLING BETWEEN PILLOWS IN PCES 3+4A;
Vesicles :
Location: Filling: CALCITE
FILLED AMYGDULES SCARCE TO ABSENT;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <5
LARGELY ALTERED TO ZEOL(?);
OLIVINE ( 4-5%)
Size(mm): <5
REPLACED BY IDDINGS;
CLINOPYROXENE ( <1%)
Size(mm): <5
BLACK LATHS,ALTERED;
Replacement: ZEOLITE
Minerals Replaced: PLAG
ID ZEOL UNCERTAIN;
IDDINGSITE
Minerals Replaced: OL
HEMATITE
CALCITE
PALAGONITE
SMECTITE
Leg : 51 Top/Bottom Interval(mm): 0/1440 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 337.44
Core: 36 Top of Core Depth (m) : 331.50
Sect: 4 Top of Section Depth(m): 336.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT,ALTERED;
Piece No. : PCES 1 (2-15), 2 (13-33), 3 (35-50), 4A (52-66),
4B (65-81), 4C (81-95), 5 (98-101), 6A (102-119),
6C (131-144);
Texture : PHYRIC,MINOR INTERPILLOW BRECCIA,GNDMASS APHANITIC
TO MICROLITIC;
Structure : PILLOW BASALT,INTERVALS 0-100+100-144CM REPRESENT
INDIVIDUAL PILLOWS OR PART OF PILLOWS,SCARCE CALCITE
-FILLED VEINS,WHITE CALCITE FILLING BETWEEN
131-137CM;
Alteration : MOD
GRAY BASALT ALTERED TO YELLOW-BROWN NEAR MARGINS;
Comments : BRECCIA IN PCES 1+6A COMPOSED OF ELONGATE FRAGMENTS
OF ALTERED BASALT ALIGNED PARALLEL TO PILLOW MARGINS
IN A MATRIX OF SMEC & PALAG & CALCITE;
Vesicles : Size(mm): Percent: 1
Location: Filling: CALCITE
Shape : SPHERICAL
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <6
PARTIALLY ALTERED TO ZEOL(?) & CLAY;
OLIVINE ( 3%)
Size(mm): <4
ALTERED TO IDDINGS;
CLINOPYROXENE ( 2%)
Size(mm): <2
ALTERED TO SMEC;
Groundmass : GNDMASS CONTAIS DISSEMINATED HEMA;
Replacement: CLAY MINERALS
Minerals Replaced: PLAG
ZEOLITE
Minerals Replaced: PLAG
ID ZEOL UNCERTAIN;
IDDINGSITE
Minerals Replaced: OL
HEMATITE
SMECTITE
Minerals Replaced: CPX
CALCITE
PALAGONITE
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 338.97
Core: 36 Top of Core Depth (m) : 331.50
Sect: 5 Top of Section Depth(m): 337.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT & INTERPILLOW
HYALOCLASTITE BRECCIA,ALTERED;
Piece No. : PCES 1 (1-15), 2 (16-29), 3 (31-33), 4 (35-40),
5 (41-53), 6A (55-71), 6B (69-75), 7 (76-88),
8 (90-104), 9A (106-120), 9B (121-127),
10 (130-147);
Texture : PHYRIC,CHILLED MARGINS & MINOR INTEPILLOW
HYALOCLASTITE BRECCIA,GNDMASS APHANITIC TO
MICROLITIC;
Structure : PILLOW BASALT,MINOR CALCITE-FILLED VEINS;
Alteration : MOD
GRAY BASALT ALTERED TO YELLOW-GRAY & DARK BROWN
WITHIN 2CM & 2MM(RESPECTIVELY) OF CHILLED MARGINS;
Comments : PCES 4+7+9A BRECCIA COMPOSED OF ELONGATE(TO 2CM)
PALAG FRAGMENTS ALIGNED PARALLEL TO PILLOW MARGINS
IN A GREEN FINE-GRAINED(<1MM) MATRIX CONSISTING OF
PALAG SHARDS & SMEC & CALCITE & HEMA;
Vesicles : Size(mm): Percent: RARE
Location: Filling: CALCITE,SMEC
VERY SCARCE AMYGDULES FILLED BY CALCITE OR SMEC;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <8
LARGELY ALTERED TO CLAY & ZEOL;
OLIVINE ( 5-8%)
Size(mm): <5
ALTERED TO IDDINGS;
CLINOPYROXENE ( <2%)
Size(mm): <3
BLACK LATHS,ALTERED TO SMEC;
Groundmass : HEMATITE
DISSEMINATED;
Replacement: ZEOLITE
Minerals Replaced: PLAG
IDDINGSITE
Minerals Replaced: OL
SMECTITE
Minerals Replaced: CPX
CLAY
Minerals Replaced: PLAG
CALCITE
PALAGONITE
Leg : 51 Top/Bottom Interval(mm): 0/1200 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 340.20
Core: 36 Top of Core Depth (m) : 331.50
Sect: 6 Top of Section Depth(m): 339.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT,ALTERED;
Piece No. : PCES 1 (4-16), 2 (21-23), 3 (26-39), 4 (36-46),
5 (49-56), 6 (53-70), 7 (73-77), 8 (80-83),
9 (86-89), 10 (91-93), 11 (96-106), 12 (109-113),
13 (116-120);
Texture : PHYRIC,CHILLED MARGINS & INTEPILLOW BRECCIA,GNDMASS
APHANITIC;
Structure : PILLOW BASALT,VEINS FILLED BY CALCITE & HEMA;
Alteration : SLIGHTLY
GRAY TO GRAY-VIOLET BASALT ALTERED TO GRAY-BROWN
NEAR MARGINS;
Comments : BRECCIA COMPOSED OF ELONGATE GREEN FRAGMENTS OF
BASALTIC GLASS(?) ALTERED TO PALAG IN A BANDED
MATRIX OF CALCITE & BLUE-GREEN SMEC;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <5
1CM PHENO IN PCE 9,PHENOS IN PCE 8 LARGER THAN
THOSE IN PCE 1 ALTERED TO CLAY & ZEOL;
OLIVINE ( <2%)
Size(mm): <0.3
DARK GREEN,RARELY 6-8MM(PCE 11);
Replacement: ZEOLITE
Minerals Replaced: PLAG
CLAY
Minerals Replaced: PLAG
IDDINGSITE
Minerals Replaced: OL
CALCITE
HEMATITE
PALAGONITE
POSSIBLY ORIGINALLY VOLCANIC GLASS;
Leg : 51 Top/Bottom Interval(mm): 0/1320 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 342.32
Core: 37 Top of Core Depth (m) : 341.00
Sect: 1 Top of Section Depth(m): 341.00
LITHOLOGY: CPX-PLAG-OL PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT,ALTERED;
Piece No. : PCES 1A (3-43), 1B (40-56), 1C (57-72), 1D (73-85),
2A (92-105), 2B (105-120), 2C (120-132);
Texture : PHYRIC,PILLOW MARGINS & TRACES OF INTERPILLOW
BRECCIA,GNDMASS APHANITIC TO MICROLITIC;
Structure : PILLOW BASALT,VEINS FILLED BY CALCITE & SMEC,PCE 2A
CONTAINS NUMEROUS CALCITE-FILLED TENSION(?) CRACKS
NORMAL TO PILLOW MARGIN;
Alteration : SLIGHTLY
PCES 1D+2 ALTERED TO GRAY-VIOLET WITH YELLOW-GRAY
MARGINS;
Comments : DARK GRAY BASALT;
Phenocrysts: CLINOPYROXENE ( 20%)
Size(mm): <5
PARTIALLY TO COMPLETELY ALTERED TO SMEC;
PLAGIOCLASE ( 5-10%)
Size(mm): <8
PARTIALLY TO COMPLETELY ALTERED TO CLAY & ZEOL;
OLIVINE ( 1%)
Size(mm): <3
PCES 1D +2,REPLACED BY IDDINGS;
PHENOS PARTIALLY ALTERED IN PCES 1A-1C,COMPLETELY
ALTERED IN PCES 1D+2;
Replacement: CLAY
Minerals Replaced: PLAG
ZEOLITE
Minerals Replaced: PLAG
SMECTITE
Minerals Replaced: CPX
IDDINGSITE
Minerals Replaced: OL
CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/1200 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 343.70
Core: 37 Top of Core Depth (m) : 341.00
Sect: 2 Top of Section Depth(m): 342.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
ALTERED;
Piece No. : PCES 1A (5-22), 1B (23-36), 1C (36-58), 2A (62-87),
2B (88-110), 2C (110-120);
Texture : PHYRIC,APHANITIC GNDMASS;
Structure : VEINLETS FILLED BY CALCITE & BROWN SMEC(?);
Alteration : SLIGHTLY
Comments : GRAY TO GRAY-BROWN GNDMASS;
Phenocrysts: PLAGIOCLASE (10-20%)
Size(mm): <3
OCCASIONALLY AS LARGE AS 4MM(PCE 2A),ALTERED TO
CLAY;
CLINOPYROXENE ( 20%)
Size(mm): <0.5
DARK GREEN,PARTIALLY ALTERED TO SMEC;
OLIVINE ( 1%)
Size(mm): <2
REPLACED BY IDDINGS;
Replacement: CLAY
Minerals Replaced: PLAG
SMECTITE
Minerals Replaced: CPX
IDDINGSITE
Minerals Replaced: OL
CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/1430 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 345.43
Core: 37 Top of Core Depth (m) : 341.00
Sect: 3 Top of Section Depth(m): 344.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT & INTERPILLOW
HYALOCLASTITE BRECCIA,ALTERED;
Piece No. : PCES 1A (1-50), 1B (51-80), 2A (82-100),
2B (100-113), 3A (115-126), 3B (127-134),
4 (137-143);
Texture : PHYRIC,CHILLED MARGINS & MINOR INTERPILLOW
HYALOCLASTITE BRECCIA,GNDMASS APHANITIC TO
MICROLITIC;
Structure : PILLOW BASALT,INTERVALS 0-80+80-115+115-143CM
REPRESENT INDIVIDUAL PILLOWS OR PARTS OF PILLOWS
BOUNDED BY CHILLED MARGINS,CALCITE-FILLED VEINS;
Alteration : MOD
GRAY BASALT ALTERED TO YELLOW-GRAY & DARK BROWN
WITHIN 5CM & 2MM(RESPECTIVELY) OF MARGINS AGAINST
BRECCIA;
Comments : PCES 2+3A+4 BRECCIA COMPOSED OF ELONGATE GREEN PALAG
FRAGMENTS ALIGNED PARALLEL TO PILLOW MARGINS IN A
FINE-GRAINED(<1MM) SELF-MATRIX OF PALAG & SMEC
CEMENTED BY CALCITE & HEMA;
Vesicles : Size(mm): <1 Percent: RARE
Location: Filling: CALCITE,SMEC
SCARCE AMYGDULES FILLED BY CALCITE & SMEC;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <5
ALTERED TO CLAY & ZEOL & CALCITE;
OLIVINE ( 8%)
Size(mm): <5
REPLACED BY IDDINGS;
CLINOPYROXENE ( TO 5%)
Size(mm): <4
BLACK AUGITIC CPX LATHS;
Replacement: ZEOLITE
Minerals Replaced: PLAG
CLAY
Minerals Replaced: PLAG
CALCITE
Minerals Replaced: PLAG
IDDINGSITE
Minerals Replaced: OL
PALAGONITE
HEMATITE
Leg : 51 Top/Bottom Interval(mm): 0/1220 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 346.72
Core: 37 Top of Core Depth (m) : 341.00
Sect: 4 Top of Section Depth(m): 345.50
LITHOLOGY: PLAG-CPX PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT,ALTERED;
Piece No. : PCES 1 (3-13), 2 (17-27), 3 (30-35), 4 (39-42),
5 (45-50), 6 (54-56), 7A (60-64), 7B (65-75),
7C (73-80), 8 (85-101), 9 (105-109), 10 (112-122);
Texture : PHYRIC,CHILLED MARGINS & MINOR INTERPILLOW BRECCIA,
GNDMASS APHANITIC;
Structure : PILLOW BASALT,VEINS NORMAL TO PILLOW MARGINS,FILLED
BY CALCITE;
Alteration : MOD
BASALT ALTERED TO YELLOW-BROWN WITH A DARK BROWN
RIM ALONG MARGINS AGAINST BRECCIA;
Comments : BRECCIA COMPOSED OF PALE YELLOW-GREEN FRAGMENTS OF
ALTERED BASALTIC GLASS,ELONGATE PARALLEL TO PILLOW
MARGINS IN A GREEN TO BLUE-GREEN MATRIX OF SMEC &
PALAG & CALCITE;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <5
PARTIALLY ALTERED TO CLAYS;
CLINOPYROXENE ( 5-10%)
Size(mm): <1.5
Replacement: CLAY
Minerals Replaced: PLAG
CALCITE
PALAGONITE
Leg : 51 Top/Bottom Interval(mm): 0/1280 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 348.28
Core: 37 Top of Core Depth (m) : 341.00
Sect: 5 Top of Section Depth(m): 347.00
LITHOLOGY: PLAG-OL PHYRIC BASALT & INTERPILLOW HYALOCLASTIC
BRECCIA,PILLOW BASALT,ALTERED;
Piece No. : PCES 1A (2-58), 1B (57-68), 2 (70-73), 3A (76-83),
3B (84-98), 4A (90-100), 5 (108-122), 6 (125-128);
Texture : PHYRIC,PILLOW MARGINS & INTERPILLOW HYALOCLASTIC
BRECCIA,GNDMASS APHANITIC;
Structure : PILLOW BASALT,MINOR CALCITE VEINS;
Alteration : MOD
GRAY BASLAT ALTERED TO YELLOW-GRAY & DARK BROWN
WITHIN 3CM & 2MM(RESPECTIVELY) OF MARGINS AGAINST
BRECCIA;
Comments : PCES 3+4A+6 COMPOSED OF ELONGATE GREEN PALAG
FRAGMENTS ALIGNED PARALLEL TO PILLOW MARGINS IN A
FINE-GRAINED(<1MM) SELF-MATRIX OF PALAG & SMEC
CEMENTED BY CALCITE & HEMA;
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): <8
REPLACED BY CALCITE & CLAY & ZEOL(?);
OLIVINE ( 5-8%)
Size(mm): <5
REPLACED BY IDDINGS & CALCITE;
CLINOPYROXENE ( 2-4%)
Size(mm): <4
BLACK AUGITIC CPX LATHS;
Replacement: CALCITE
Minerals Replaced: OL,PLAG
CLAY
Minerals Replaced: PLAG
ZEOLITE
Minerals Replaced: PLAG
ID ZEOL UNCERTAIN;
PALAGONITE
SMECTITE
IDDINGSITE
Minerals Replaced: OL
HEMATITE
Leg : 51 Top/Bottom Interval(mm): 0/1320 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 349.82
Core: 38 Top of Core Depth (m) : 348.50
Sect: 1 Top of Section Depth(m): 348.50
LITHOLOGY: PLAG-PYX-OL PHYRIC BASALT & PALAG INTERPILLOW
BRECCIA,PILLOW BASALT,ALTERED;
Piece No. : PCES 1 (4-16), 2 (19-24), 3 (27-36), 4 (39-42),
5 (45-47), 6 (50-51), 7 (54-55), 8 (57-60),
9 (62-68), 10 (72-76), 11A (79-105), 11B (107-116),
12 (120-137), 13 (130-132);
Texture : PHYRIC,CHILLED MARGINS & PALAG INTERPILLOW BRECCIA,
GNDMASS APHANITIC;
Structure : PILLOW BASALT,VEINS FILLED BY FINE-TO-COARSE-GRAINED
CALCITE,PILLOW MARGINS LOCALLY CUT BY RANDOMLY
ORIENTED FRACTURES;
Alteration : FRESH
PCES 1+2+11B;ED PARALLEL TO PILLOW MARGINS IN A
SLIGHTLY
PCES 3+11A;
MOD
PCES 4-10+12-13;
Comments : BRECCIA IN PCES 3-5+7-10+13 CONSISTS OF PALE YELLOW-
GREEN FRAGMENTS OF ALTERED BASALTIC GLASS IN A
BANDED GREEN TO BROWN SELF-MATRIX COMPOSED OF PALAG
& SMEC & CALCITE;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <9
FRESH INPCE 1,LARGELY REPLACED BY ZEOL OR CLAY(?)
IN PCES 2-6+8-12;
PYROXENE ( 15%)
Size(mm): <2
LARGELY REPLACED BY YELLOW GREEN SMEC;
OLIVINE ( 10%)
Size(mm): <2
REPLACED BY CALCITE OR SMEC;
Replacement: ZEOLITE
Minerals Replaced: PLAG
CLAY
Minerals Replaced: PLAG
SMECTITE
Minerals Replaced: PYX,OL
CALCITE
Minerals Replaced: OL
PALAGONITE
Leg : 51 Top/Bottom Interval(mm): 0/1050 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 351.05
Core: 38 Top of Core Depth (m) : 348.50
Sect: 2 Top of Section Depth(m): 350.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT,ALTERED;
Piece No. : PCES 1 (5-56), 2 (61-66), 3 (68-71), 4 (73-80),
5 (85-92), 6 (95-99), 7 (102-105);
Texture : PHYRIC,CHILLED MARGINS & MINOR INTERPILLOW BRECCIA,
GNDMASS APHANITIC TO MICROLITIC;
Structure : PILLOW BASALT,VEINS FILLED BY CALCITE;
Alteration : SLIGHTLY
PCE 1;
MOD
PCES 2-7,DARK GRAY TO GRAY-VIOLET BASALT ALTERED
TO GRAY-BROWN & RED-BROWN NEAR MARGINS;
Comments : BRECCIA COMPOSED OF LIGHT YELLOW-GREEN FRAGMENTS OFQ
ALTERED BASALTIC GLASS IN A BANDED SELF-MATRIX OF
PALAG & SMEC & CALCITE & HEMA;
Phenocrysts: PLAGIOCLASE (20-25%)
Size(mm): <4
ALTERED TO CLAY & ZEOL;
CLINOPYROXENE ( 5-10%)
Size(mm): 1
OLIVINE ( 1%)
Size(mm): <1.5
REPLACED BY IDDINGS;
Replacement: CLAY
Minerals Replaced: PLAG
ZEOLITE
Minerals Replaced: PLAG
IDDINGSITE
Minerals Replaced: OL
CALCITE
HEMATITE
PALAGONITE
Leg : 51 Top/Bottom Interval(mm): 0/1410 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 352.91
Core: 38 Top of Core Depth (m) : 348.50
Sect: 3 Top of Section Depth(m): 351.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT,ALTERED;
Piece No. : PCES 1A (4-29), 1B (30-70), 1C (70-97), 2 (100-101),
3 (104-141);
Texture : PHYRIC,CHILLED MARGINS & TRACES OF INTERPILLOW
BRECCIA,GNDMASS APHANITIC TO MICROLITIC;
Structure : PILLOW BASALT,CALCITE-FILLED VEINS COMMON,PCE 1B
CONTAINS PYR-FILLED VEINS;
Alteration : SLIGHTLY
DARK GRAY BASALT ALTERED TO YELLOW-BROWN NEAR
MARGINS;
Comments : PCES 1A+2-3 BRECCIA COMPOSED OF FRAGMENTS OF PALE
YELLOW-GREEN ALTERED BASALTIC GLASS IN A BANDED
GREEN MATRIX OF PALAG & SMEC & CALCITE;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <3
PARTIALLY ALTERED TO CLAY;
CLINOPYROXENE ( 15%)
Size(mm): <1
OLIVINE ( 1%)
Size(mm): <2
COMPLETELY REPLACED BY IDDINGS;
Replacement: CLAY
Minerals Replaced: PLAG
IDDINGSITE
Minerals Replaced: OL
CALCITE
SMECTITE
PALAGONITE
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 354.48
Core: 38 Top of Core Depth (m) : 348.50
Sect: 4 Top of Section Depth(m): 353.00
LITHOLOGY: PLAG-CPX PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT,ALTERED;
Piece No. : PCES 1 (3-21), 2A (24-29), 2B (30-52), 2C (55-78),
3A (80-98), 3B (99-133), 4 (135-148);
Texture : PHYRIC,CHILLED MARGINS & MINOR INTERPILLOW BRECCIA,
GNDMASS APHANITIC;
Structure : PILLOW BASALT,VEINS & MICROFRACTURES FILLED BY
CALCITE,PHENOS CONCENTRATED IN FLOW BANDS
SUBPARALLEL TO PILLOW MARGINS;
Alteration : SLIGHTLY
GRAY TO GRAY-VIOLET BASALT ALTERED TO YELLLOW-
BROWN NEAR MARGINS;
Comments : BRECCIA IN PCES 1+2 COMPOSED OF PALE GREEN FRAGMENTS
OF ALTERED BASALTIC GLASS IN A BANDED GREEN TO BROWN
MATRIX OF PALAG & SMEC & CALCITE;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <3
PARTIALLY ALTERED TO CLAY & ZEOL(?);
CLINOPYROXENE ( 10%)
Size(mm): <1
Replacement: CLAY
Minerals Replaced: PLAG
ZEOLITE
Minerals Replaced: PLAG
ID ZEOL UNCERTAIN;
SMECTITE
CALCITE
PALAGONITE
Vesicles :
Location: Filling: SMEC
Leg : 51 Top/Bottom Interval(mm): 0/1270 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 355.77
Core: 38 Top of Core Depth (m) : 348.50
Sect: 5 Top of Section Depth(m): 354.50
LITHOLOGY: PLAG-CPX PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT,ALTERED;
Piece No. : PCES 1 (3-10), 2 (13-20), 3 (24-48), 4 (53-60),
5A (63-65), 5B (65-72), 5C (72-81), 5D (82-85),
5E (86-88), 6 (90-97), 7A (105-115), 7B (115-127);
Texture : PHYRIC,APHYRIC CHILLED MARGINS IN A CEMENTED
INTERPILLOW BRECCIA,GNDMASS APHANITIC;
Structure : PILLOW BASALT,STRONGLY FRACTURED 20-90CM SEALED BY
LARGE VEINS OF CALCITE & PALE GREEN SMEC;
Alteration : MOD
BASALT ALTERD TO YELLOW-BROWN & RED-BROWN;
Comments : PCES 1-3+5-6 BRECCIA COMPOSED OF ELONGATE PALE
YELLOW-GREEN FRAGMENTS OF ALTERED BASALTIC GLASS
EITHER RANDOMLY ORIENTED OR ALIGNED PARALLEL TO
PILLOW MARGINS IN A BANDED GREEN MATRIX OF PALAG &
SMEC & CALCITE;
Vesicles : Size(mm): <2 Percent: 5
Location: Filling: COMBINE
CLAY & CALCITE & ZEOL FILLING,VESICLES PRESENT IN
BOTH BASALT & BRECCIA SHARDS;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <3
ALTERED TO ZEOL & CLAY;
CLINOPYROXENE
Size(mm): <0.4
Replacement: CLAY
Minerals Replaced: PLAG
ZEOLITE
Minerals Replaced: PLAG
SMECTITE
CALCITE
PALAGONITE
Leg : 51 Top/Bottom Interval(mm): 0/1450 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 357.45
Core: 38 Top of Core Depth (m) : 348.50
Sect: 6 Top of Section Depth(m): 356.00
LITHOLOGY: PLAG-CPX PHYRIC BASALT;
ALTERED;
Piece No. : PCES 1 (2-23), 2 (25-60), 3 (60-70), 4 (75-115),
5 (120-145);
Texture : PHYRIC,MICROLITIC GNDMASS;
Structure : CALCITE-FILLED VEINS COMMON & IN PCES 2+3 THESE ARE
STRONGLY ALIGNED NORMAL TO THE CORE AXIS;
Alteration : SLIGHTLY
GNDMASS ALTERED TO GRAY-BROWN ALONG CRACKS;
Comments : GRAY BASALT;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <7
PARTIALLY ALTERED TO CLAY;
CLINOPYROXENE (10-15%)
Size(mm): <4
Replacement: CLAY
Minerals Replaced: PLAG
CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 358.97
Core: 38 Top of Core Depth (m) : 348.50
Sect: 7 Top of Section Depth(m): 357.50
LITHOLOGY: PLAG-CPX PHYRIC BASALT;
ALTERED;
Piece No. : PCES 1 (5-22), 2 (28-30), 3 (33-46), 4 (52-59),
5 (62-63), 6 (65-90), 7 (94-125), 8 (129-147);
Texture : PHYRIC,APHANITIC GNDMASS;
Structure : VEINS FILLED BY CALCITE & ANAL(?) & BETWEEN 70-110CM
THESE ARE ALIGNED NORMAL TO THE CORE AXIS;
Alteration : SLIGHTLY
Phenocrysts: PLAGIOCLASE ( <5%)
Size(mm): <3
PCES 3+8;
PLAGIOCLASE (15-20%)
Size(mm): <3
PCES 1-2+4+7;
Replacement: CLAY
Minerals Replaced: PLAG
ANAL
Minerals Replaced: PLAG
ID ANAL UNCERTAIN;
CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/1320 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 360.32
Core: 38 Top of Core Depth (m) : 348.50
Sect: 8 Top of Section Depth(m): 359.00
LITHOLOGY: PLAG-CPX PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT,ALTERED;
Piece No. : PCES 1 (1-7), 2 (11-23), 3 (28-33), 4A (41-55),
4B (55-60), 5 (65-68), 6 (73-78), 7 (82-94),
8 (99-105), 9 (112-115), 10 (122-132);
Texture : PHYRIC,CHILLED MARGINS & MINOR INTERPILLOW BRECCIA,
GNDMASS APHANITIC;
Structure : PILLOW BASALT,VEINS FILLED BY CALCITE OR ANAL;
Alteration : SLIGHTLY
GRAY-VIOLET BASALT ALTERED TO YELLOW-BROWN NEAR
MARGINS & RED-BROWN AGAINST BRECCIA;
Comments : BRECCIA COMPOSED OF PALE YELLOW-GREEN PARTIALLY
HEMATIZED FRAGMENTS OF ALTERED BASALTIC GLASS IN A
BANDED PALE TO YELLOW-GREEN MATRIX OF PALAG & SMEC &
CALCITE & HEMA;
Phenocrysts: PLAGIOCLASE (10-20%)
Size(mm): <3
CLINOPYROXENE ( 15%)
Size(mm): <0.5
Replacement: CLAY
Minerals Replaced: PLAG
ANAL
Minerals Replaced: PLAG
CALCITE
HEMATITE
PALAGONITE
SMECTITE
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 358.83
Core: 39 Top of Core Depth (m) : 357.36
Sect: 1 Top of Section Depth(m): 357.36
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
ALTERED BASALT;
Piece No. : PCES 1 (4-10), 2 (15-20), 3A (23-47), 3B (47-70),
4 (73-83), 5 (86-91), 6 (95-147);
Structure : PCES 1+5 CONTAIN VEINS FILLED BY CALCITE,ANAL &
NATROL;
Alteration : MOD
PCES 1+2 ALTERED TO YELLOW-BROWN;
SLIGHTLY
PCES 3-6;
Comments : HEMATIZED BASALT IN VICINITY OF CRACKS;
Phenocrysts: PLAGIOCLASE (20-25%)
Size(mm): <5
PARTIALLY ALTERED TO WHITE CLAY(?);
CLINOPYROXENE ( 5%)
Size(mm): <0.4
OLIVINE ( <1%)
Size(mm): <1
COMPLETELY ALTERED;
Groundmass : HEMATITE
DISSEMINATED;
Replacement: CLAY
Minerals Replaced: PLAG
CALCITE
ANAL
Leg : 51 Top/Bottom Interval(mm): 0/1460 Analyst: Sinton, J.
Hole: 417A Sample Midpoint (m) : 360.32
Core: 39 Top of Core Depth (m) : 357.36
Sect: 2 Top of Section Depth(m): 358.86
LITHOLOGY: PLAG-OL MOD PHYRIC BASALT;
ALTERED BASALT;
Piece No. : PCES 1 (1-4), 2 (5-16), 3 (18-21), 4 (24-32),
5 (33-40), 6 (42-45), 7 (47-64), 8 (68-130),
9 (130-140), 10 (141-147);
Texture : MOD PHYRIC,MICROLITIC GNDMASS;
Structure : VEINS FILLED BY SMEC(PCES 1+2) OR BY CELAD & ANAL &
NATROLITE +/- CALCITE(PCE 3),PCE 8 CONTAINS A VEIN
FILLED WITH LARGE ANAL XTLS;
Alteration : MOD
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): <8
PARTIALLY REPLACED BY CLAY & CALCITE & ANAL;
OLIVINE ( 1-2%)
Size(mm): <3
COMPLETELY REPLACED;
Groundmass : HEMATITE
DISSEMINATED;
Replacement: CLAY
Minerals Replaced: PLAG
CALCITE
Minerals Replaced: PLAG
ANAL
Minerals Replaced: PLAG
SMECTITE
CELADONITE
NATROLITE
Vesicles : PCE 7 AMYGDALOIDAL;
Leg : 51 Top/Bottom Interval(mm): 0/1300 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 361.66
Core: 39 Top of Core Depth (m) : 357.36
Sect: 3 Top of Section Depth(m): 360.36
LITHOLOGY: PLAG-CPX PHYRIC BASALT;
ALTERED BASALT;
Piece No. : PCES 1 (1-31), 2 (33-47), 3A (57-62), 3B (62-65),
4 (68-70), 5 (72-75), 6 (77-86), 7 (90-96),
8 (100-104), 9 (107-120), 10 (123-130);
Texture : PHYRIC,GNDMASS MICROLITIC;
Structure : BASALT LOCALLY FRACTURED,VEINS FILLED BY PALE GREEN
SMEC & CALCITE(PCES 1-3A) OR BY XTLS OF ANAL &
NATROL(PCES 3B-5);
Alteration : SLIGHTLY
PCES 3B-6 GREATER ALTERATION TO MOD,GRAY BASALT
ALTERED TO YELLOW-GRAY & YELLOW-BROWN ALONG VEINS;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <3
ALTERED TO CLAY & ANAL;
CLINOPYROXENE ( 5-7%)
Size(mm): <0.2
Replacement: CLAY
Minerals Replaced: PLAG
ANAL
Minerals Replaced: PLAG
SMECTITE
CALCITE
NATROLITE
Leg : 51 Top/Bottom Interval(mm): 0/1400 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 363.26
Core: 39 Top of Core Depth (m) : 357.36
Sect: 4 Top of Section Depth(m): 361.86
LITHOLOGY: PLAG-CPX PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT,ALTERED;
Piece No. : PCES 1 (5-19), 2 (25-52), 3 (55-94), 4 (99-126),
5 (133-140);
Texture : PHYRIC,CHILLED MARGINS & TRACES OF INTERPILLOW
BRECCIA BETWEEN 92-98CM,GNDMASS MICROLITIC;
Structure : PILLOW BASALT,VEINS FILLED BY BROWN SMEC & CALCITE;
Alteration : SLIGHTLY
GRAY BASALT ALTERED TO YELLOW-BROWN NEAR MARGINS;
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): <12
PCES 1-2+5 PHENOS ARE <5MM PARTIALLY ALTERED TO
CLAY.MIN;
CLINOPYROXENE ( 7%)
Size(mm): <0.2
Replacement: CLAY
Minerals Replaced: PLAG
SMECTITE
CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 364.97
Core: 40 Top of Core Depth (m) : 363.50
Sect: 1 Top of Section Depth(m): 363.50
LITHOLOGY: PLAG-CPX PHYRIC BASALT & BRECCIA;
ALTERED;
Piece No. : PCES 1A (2-12), 1B (12-29), 1C (30-50), 1D (50-70),
1E (70-78), 2 (81-85), 3 (88-93), 4 (95-99),
5 (101-105), 6 (108-110), 7A (112-120),
7B (122-125), 7C (125-135), 7D (135-147);
Texture : PHYRIC,CHILLED MARGINS & MINOR BRECCIA,GNDMASS
MICROLITIC;
Structure : VEINS FILLED BY BROWN SMEC & ANAL;
Alteration : FRESH
PCES 1A-1B+1D-1E;
SLIGHTLY
PCE 1C;
MOD
PCES 2-7D;
GRAY BASALT ALTERED TO YELLOW-BROWN IN PCES 2+4-7C
THE TOP OF 7D;
Comments : BRECCIA COMPOSED OF YELLOW TO YELLOW-BROWN FRAGMENTS
OF ALTERED BASALT OR BASALTIC GLASS CUT BY VEINS OF
HEMA IN A BANDED MATRIX OF CALCITE & ANAL & BLACK
SHARDS OF RELATIVELY FRESH GLASS OR OF GREEN PALAG &
SMEC & CALCITE & HEMA (PCES 7B+7C);
Vesicles : PCE 1B CONTAINS A SMALL ANAL-FILLED VUG;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <7
PARTIALLY REPLACED BY CLAY & ANAL;
CLINOPYROXENE ( 10%)
Size(mm): <0.5
Replacement: CLAY
Minerals Replaced: PLAG
ANAL
Minerals Replaced: PLAG
SMECTITE
CALCITE
HEMATITE
PALAGONITE
Leg : 51 Top/Bottom Interval(mm): 0/1350 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 366.35
Core: 40 Top of Core Depth (m) : 363.50
Sect: 2 Top of Section Depth(m): 365.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT & INTERPILLOW OR INTERFLOW
BRECCIA,ALTERED BASALT;
Piece No. : PCES 1 (5-10), 2 (11-17), 3 (20-22), 4 (25-29),
5 (31-33), 6A (35-54), 6B (54-71, 6C (71-135);
Texture : PHYRIC,CHILLED MARGIN AT THE TOP OF PCE 6A & TRACES
OF INTERPILLOW OR INTERFLOW BRECCIA IN PCE 5,
MICROLITIC GNDMASS,APHANITIC MARGIN IN PCE 6A;
Structure : VEINS FILLED BY CALCITE & DARK GREEN SMEC;
Alteration : MOD
DARK GRAY BASALT ALTERED TO PALE BROWN IN PCE 4 &
TO PALE YELLOW-BROWN NEAR APHANITIC MARGIN IN PCE
6A;
Comments : BRECCIA IN PCE 5 COMPOSED OF FRAGMENTS OF BASALT
ALTERED TO PALAG(?) IN A GREEN SELF MATRIX OF PALAG
& RED-BROWN SMEC OR HEMA & CALCITE;
Vesicles : Size(mm): Percent: 1
Location: Filling: CALCITE,SMEC
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <7
LARGELY REPLACED;
CLINOPYROXENE ( 2-3%)
Size(mm): <5
ALTERED;
OLIVINE ( <2%)
Size(mm): <2
REPLACED BY IDDINGS;
Replacement: IDDINGSITE
Minerals Replaced: OL
CALCITE
SMECTITE
PALAGONITE
ID PALAG UNCERTAIN;
HEMATITE
Leg : 51 Top/Bottom Interval(mm): 0/1430 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 367.93
Core: 40 Top of Core Depth (m) : 363.50
Sect: 3 Top of Section Depth(m): 366.50
LITHOLOGY: PLAG-CPX PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT,ALTERED BASALT;
Piece No. : PCES 1 (2-42), 2A (50-70), 2B (71-81), 2C (80-87),
2D (87-95), 2E (96-109), 2F (111-143);
Texture : PHYRIC,CHILLED MARGINS & MINOR INTERPILLOW BRECCIA,
MICROLITIC GNDMASS;
Structure : PILLOW BASALT,INTERVALS 0-48+48-71+78-110+110-143CM
REPRESENT INDIVIDUAL PILLOWS OR PARTS OF PILLOWS
BOUNDED BY THICK GLASSY MARGINS,VEINS & CAVITIES
(PCES 2C+2D) COMPOSED OF CALCITE & SMEC & ZEOL;
Alteration : MOD
GRAY BASALT ALTERED TO YELLOW-BROWN NEAR MARGINS;
Comments : BRECCIA MATRIX (PCES 2B+2E-2F) COMPOSED OF CALCITE &
SMEC & ZEOL;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <6
PARTLY ALTERED TO CLAY;
CLINOPYROXENE ( 2%)
Size(mm): <3
ALTERED;
OLIVINE ( 2%)
Size(mm): <2
COMPLETELY ALTERED;
Replacement: CLAY
Minerals Replaced: PLAG
CALCITE
SMECTITE
ZEOLITE
Leg : 51 Top/Bottom Interval(mm): 0/ 950 Analyst: Sinton, J.
Hole: 417A Sample Midpoint (m) : 368.95
Core: 40 Top of Core Depth (m) : 363.50
Sect: 4 Top of Section Depth(m): 368.00
LITHOLOGY: PLAG-OL PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT,ALTERED BASALT;
Piece No. : PCES 1A (2-30), 1B (30-43), 2A (45-70), 2B (70-80),
3 (83-87), 4 (90-95);
Texture : PHYRIC,CHILLED MARGIN BETWEEN 70-75CM,INTERPILLOW
BRECCIA BETWEEN 0-3+75-95CM,GNDMASS MICROLITIC;
Structure : PILLOW BASALT,CALCITE VEINS 1-4MM,WIDE CUT IN PCE
1A;
Alteration : MOD
Comments : BRECCIA COMPOSED OF CLASTS OF BASALTIC GLASS ALTERED
TO PALAG IN A MATRIX OF SMEC & CELAD & CALCITE &
ZEOL,CLASTS IN PCES 3+4 ARE ALIGNED PARALLEL TO
MARGINS;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): 1-4
PHENO CORES PREFERENTIALLY ALTERED TO CALCITE &
ZEOL;
OLIVINE ( 5-10%)
Size(mm): 1-3
Replacement: ZEOLITE
Minerals Replaced: PLAG
CALCITE
Minerals Replaced: PLAG
PALAGONITE
Minerals Replaced: GLASS
SMECTITE
CELADONITE
Leg : 51 Top/Bottom Interval(mm): 0/ 760 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 370.26
Core: 40 Top of Core Depth (m) : 363.50
Sect: 5 Top of Section Depth(m): 369.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
Piece No. : PCES 1 (1-31), 1A (32-45), 1B (43-52), 1C (53-64),
1D (62-76);
Texture : PHYRIC,CHILLED MARGIN AT TOP OF PCE 1;
Structure : VEINS FILLED BY CALCITE & CELAD;
Alteration : MOD
GRAY BASALT ALTERED TO YELLOW-GRAY NEAR MARGIN;
Vesicles : Size(mm): <1 Percent:
Location: Filling: CALCITE OR SMEC
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): <10
PARTIALLY REPLACED BY CALCITE & ANAL(?);
OLIVINE ( 3-4%)
Size(mm): <3
REPLACED BY IDDINGS & CALCITE;
CLINOPYROXENE ( 1-2%)
Size(mm): <3
BLACK AUGITIC CPX LATHS;
Replacement: CALCITE
Minerals Replaced: OL,PLAG
ANAL
Minerals Replaced: PLAG
ID ANAL UNCERTAIN;
IDDINGSITE
Minerals Replaced: OL
SMECTITE
CELADONITE
Leg : 51 Top/Bottom Interval(mm): 0/1460 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 370.96
Core: 41 Top of Core Depth (m) : 369.50
Sect: 1 Top of Section Depth(m): 369.50
LITHOLOGY: PLAG-PYX-OL PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT,ALTERED BASALT;
Piece No. : PCES 1 (4-11), 2A (15-43), 2B (41-51), 2C (51-60),
2D (59-100), 2E (100-110), 2F (110-115),
2G (115-126), 2H (125-131), 3 (133-135),
4 (137-146);
Texture : PHYRIC,CHILLED MARGIN IN PCE 4 & INTERPILLOW BRECCIA
IN PCES 1+2H+3,GNDMASS MICROLITIC;
Structure : PILLOW BASALT,VEINS FILLED BY CALCITE & SMEC & PYR;
Alteration : MOD
GRAY BASALT ALTERED TO YELLOW-GRAY & BROWN WITHIN
3CM & 2MM(RESPECTIVELY) OF MARGIN AGAINST BRECCIA;
Comments : BRECCIA CONSISTS OF YELLOW-BROWN TO GREEN FRAGMENTS
OF ALTERED BASALT IN A FINE-GRAINED & BANDED GREEN
MATRIX COMPOSED OF PALAG & SMEC CEMENTED BY CALCITE;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: CALCITE,SMEC
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <10
PARTIALLY REPLACED BY CALCITE & ZEOL;
PYROXENE ( 2-3%)
Size(mm): <4
AUGITIC PYX LATHS,PARTIALLLY ALTERED TO SMEC;
OLIVINE ( 1%)
Size(mm): <3
REPLACED BY IDDINGS & CALCITE;
Replacement: CALCITE
Minerals Replaced: OL,PLAG
ZEOLITE
Minerals Replaced: PLAG
SMECTITE
Minerals Replaced: PYX
IDDINGSITE
Minerals Replaced: OL
PALAGONITE
PALAGONITE
Leg : 51 Top/Bottom Interval(mm): 0/1460 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 372.46
Core: 41 Top of Core Depth (m) : 369.50
Sect: 2 Top of Section Depth(m): 371.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT,ALTERED BASALT;
Piece No. : PCES 1A (2-15), 1B (12-22), 1C (23-37), 2 (40-51),
3 (54-58), 4 (62-79), 5 (81-98), 6A (100-119),
6B (118-125), 6C (122-139), 6D (140-146);
Texture : PHYRIC,CHILLED MARGINS AGAINST BRECCIA IN PCES 1-5,
GNDMASS MICROLITIC;
Structure : PILLOW BASALT,VEINS FILLED BY CALCITE;
Alteration : MOD
GRAY BASALT IN PCE 6 ALTERED TO YELLOW-BROWN NEAR
MARGINS IN PCES 1-5;
Comments : BRECCIA COMPOSED OF ELONGATE FRAGMENTS OF PALAG
ALIGNED PARALLEL TO PILLOW MARGINS IN A GREEN FINE-
GRAINED(<1MM) SELF MATRIX OF PALAG & SMEC CEMENTED
BY CALCITE & HEMA,THE BRECCIA IN PCE 2 IS COMPOSED
OF ALTERED BASALT FRAGMENTS IN A CALCITE-RICH
MATRIX;
Vesicles : Size(mm): <1 Percent:
Location: Filling: CALCITE OR SMEC
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): <5
LARGELY REPLACED BY CALCITE & ANAL;
OLIVINE ( 4-5%)
Size(mm): <5
REPLACED BY IDDINGS;
CLINOPYROXENE ( 2-3%)
Size(mm): <5
AUGITIC CPX LATHS,ALTERED TO SMEC;
Replacement: CALCITE
Minerals Replaced: PLAG
ANAL
Minerals Replaced: PLAG
IDDINGSITE
Minerals Replaced: OL
SMECTITE
Minerals Replaced: CPX
PALAGONITE
Leg : 51 Top/Bottom Interval(mm): 0/1320 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 373.82
Core: 41 Top of Core Depth (m) : 369.50
Sect: 3 Top of Section Depth(m): 372.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
Piece No. : PCES 1A (4-41), 1B (41-50), 1C (50-70), 2A (71-87),
2B (87-103) 2C (103-110);
Texture : PHYRIC,INTERSERTAL GNDMASS;
Structure : VEINS FILLED BY CALCITE & SMEC OR BY PYR(PCE 2A);
Alteration : SLIGHTLY
Vesicles : Size(mm): <1 Percent:
Location: Filling: CALCITE,SMEC
UNCOMMON;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <10
PARTLY REPLACED BY CALCITE & ANAL & ZEOL(?);
CLINOPYROXENE ( 4-5%)
Size(mm): <4
AUGITIC CPX LATHS;
OLIVINE ( 3-4%)
Size(mm): <5
IN PCE 2D,REPLACED BY IDDINGS & CALCITE;
Replacement: CALCITE
Minerals Replaced: PLAG,OL
ANAL
Minerals Replaced: PLAG
ZEOLITE
Minerals Replaced: PLAG
ID ZEOL UNCERTAIN;
IDDINGSITE
Minerals Replaced: OL
SMECTITE
Leg : 51 Top/Bottom Interval(mm): 0/1450 Analyst: Juteau, T.
Hole: 417A Sample Midpoint (m) : 375.45
Core: 41 Top of Core Depth (m) : 369.50
Sect: 4 Top of Section Depth(m): 374.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT,ALTERED;
Piece No. : PCES 1 (2-43), 2A (45-55), 2B (54-76), 3 (77-91),
4A (94-122), 4B (122-144);
Texture : PHYRIC,CHILLED MARGINS AGAINST PALAGONITIC
INTERPILLOW BRECCIA IN PCES 2B+4A,GNDMASS
MICROLITIC;
Structure : PILLOW BASALT,VEINS FILLED BY CALCITE;
Alteration : MOD
GRAY BASALT ALTERED TO YELLOW-BROWN NEAR MARGINS,
FRAGMENTS IN PCE 3 ALTERED TO BROWN AGAINST
BRECCIA;
Comments : BRECCIA COMPOSED OF ELONGATE FRAGMENTS OF PALAG IN A
BANDED GREEN MATRIX OF PALAG & SMEC CEMENTED BY
CALCITE;
Vesicles : Size(mm): 1-2 Percent:
Location: Filling: CALCITE OR SMEC
SCARCE AMOUNT;
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): <5
ALTERED TO CLAY;
CLINOPYROXENE ( 3-4%)
Size(mm): <4
AUGITIC CPX LATHS,PARTLY ALTERED TO SMEC;
OLIVINE ( 5%)
Size(mm): <5
IN PCE 2B,ALTERED TO IDDINGS;
Replacement: CLAY
Minerals Replaced: PLAG
SMECTITE
Minerals Replaced: CPX
IDDINGSITE
Minerals Replaced: OL
CALCITE
PALAGONITE
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 376.97
Core: 41 Top of Core Depth (m) : 369.50
Sect: 5 Top of Section Depth(m): 375.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW BASALT,ALTERED;
Piece No. : PCES 1 (2-11), 2A (20-30), 2B (30-45), 3 (47-52),
4A (55-61), 4B (60-75), 4C (74-79), 4D (78-91),
4E (91-106), 5 (110-116), 6 (118-136), 7 (139-147);
Texture : PHYRIC,GLASSY CHILLED MARGINS BETWEEN 15-25CM,
GNDMASS MICROLITIC;
Structure : PILLOW BASALT,VEINS FILLED BY CALCITE & DARK GREEN
SMEC & SULFIDES;
Alteration : MOD
Vesicles : PCE 4E CONTAINS IRREGULAR SMEC-FILLED VUGS;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <10
TO 3MM IN PCES 1-4D,TO 10MM IN PCES 4E-7;
CLINOPYROXENE ( 5%)
Size(mm): <2
ALTERED;
OLIVINE ( 2%)
Size(mm): <1
COMPLETELY REPLACED BY IDDINGS;
Replacement: IDDINGSITE
Minerals Replaced: OL
CALCITE
SMECTITE
SULFIDES
Leg : 51 Top/Bottom Interval(mm): 0/1240 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 378.24
Core: 41 Top of Core Depth (m) : 369.50
Sect: 6 Top of Section Depth(m): 377.00
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT,ALTERED BASALT;
Piece No. : PCES 1A (2-5), 1B (4-18), 2 (25-30), 3A (32-45),
3B (45-62), 4 (65-71), 5 (74-94), 6 (98-110),
7 (115-124);
Texture : PHYRIC,CHILLED MARGINS AT THE TOP OF PCES 3A+5 & AT
THE BOTTOM OF PCES 1B+5-7,GNDMASS MICROLITIC WITH
APHANITIC TO GLASSY MARGINS;
Structure : PILLOW BASALT,VEINS FILLED BY CALCITE & ZEOL;
Alteration : SLIGHTLY
Comments : BRECCIA IN PCE 2 CONTAINS CALCITE & ZEOL;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <6
PARTLY ALTERED TO CLAY;
OLIVINE ( 10%)
Size(mm): <3
COMPLETELY REPLACED BY IDDINGS;
Replacement: CLAY
Minerals Replaced: PLAG
IDDINGSITE
Minerals Replaced: OL
CALCITE
ZEOLITE
Leg : 51 Top/Bottom Interval(mm): 0/1450 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 380.45
Core: 42 Top of Core Depth (m) : 379.00
Sect: 1 Top of Section Depth(m): 379.00
LITHOLOGY: PLAG-OL PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT,ALTERED;
Piece No. : PCES 1 (2-5), 2A (7-20), 2B (20-35), 2C (35-51),
2D (49-72), 3 (75-77), 4 (80-82), 5 (83-101),
6 (106-145);
Texture : PHYRIC,CHILLED MARGINS IN PCE 5 & THE TOP & BOTTOM
OF PCES 2+6,PCE 3 IS COMPOSED OF INTERPILLOW
BRECCIA,XTLLINE GNDMASS GRADES TO MICROXTLLINE TO
APHANHITIC & FINALLY GLASSY TOWARD MARGINS;
Structure : PILLOW BASALT,VEINS FILLED BY CALCITE & DARK GREEN
SMEC;
Alteration : SLIGHTLY
GRAY BASALT ALTERED TO YELLOW-BROWN WITH A 2MM
DARK BROWN CRUST ALONG MARGINS;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <10
OLIVINE ( 5%)
Size(mm): <4
REPLACED BY IDDINGS;
Replacement: IDDINGSITE
Minerals Replaced: OL
CALCITE
SMECTITE
Leg : 51 Top/Bottom Interval(mm): 0/1500 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 382.00
Core: 42 Top of Core Depth (m) : 379.00
Sect: 2 Top of Section Depth(m): 380.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT,ALTERED BASALT;
Piece No. : PCES 1A (2-21), 1B (20-31), 1C (30-50), 2 (57-58),
3 (60-99), 4A (102-115), 4B (115-130), 4C (131-150);
Texture : PHYRIC,CHILLED MARGINS,GNDMASS XTLLINE WITH
APHANITIC MARGINS;
Structure : PILLOW BASALT,INTERVALS 0-55+55-100+100-150CM
REPRESENT INDIVIDUAL PILLOWS OR PARTS OF PILLOWS
BOUNDED BY CHILLED MARGINS,VEINS FILLED BY CALCITE &
SMEC;
Alteration : MOD
PLAG & OL PHENOS ALTERED;
Vesicles :
Location: Filling: CALCITE,SMEC
COMMON BETWEEN 27-30CM;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <10
OLIVINE ( 5%)
Size(mm): <4
Replacement: CALCITE
SMECTITE
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 383.48
Core: 42 Top of Core Depth (m) : 379.00
Sect: 3 Top of Section Depth(m): 382.00
LITHOLOGY: PLAG PHYRIC BASALT & INTERPILLOW BRECIA;
PILLOW BASALT,ALTERED;
Piece No. : PCES 1 (3-8), 2A (11-26), 2B (27-91), 3A (98-102),
3B (102-120), 4 (123-135), 5 (138-148);
Texture : PHYRIC,CHILLED MARGINS & MINOR INTERPILLOW BRECCIA;
Structure : PILLOW BASALT,CALCITE-FILLED VEINS COMMON,BASALT IN
PCE 3 FRACTURED & CEMENTED BY CALCITE;
Alteration : SLIGHTLY
GRAY-VIOLET BASALT ALTERED TO YELLOW-BROWN NEAR
MARGINS,PHENOS ALTERED;
Comments : BRECCIA IN PCES 1+3-5 CONSISTS OF SMALL PALE GREEN
FRAGMENTS OF BASALTIC GLASS ALTERED TO PALAG THE
LONGER OF WHICH ARE ALIGNED SUBPARALLEL TO PILLOW
MARGINS IN A GREEN MATRIX OF SMEC & CELAD & PALAG
CEMENTED BY VEINS OF CALCITE & HEMA;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <3
MAFIC ( 5-7%)
Size(mm): <0.4
Replacement: CALCITE
PALAGONITE
Minerals Replaced: GLASS
SMECTITE
CELADONITE
HEMATITE
Leg : 51 Top/Bottom Interval(mm): 0/1400 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 384.90
Core: 42 Top of Core Depth (m) : 379.00
Sect: 4 Top of Section Depth(m): 383.50
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT,ALTERED BASALT;
Piece No. : PCES 1A (3-42), 1B (42-75), 2 (78-108),
3A (110-121), 3B (119-140);
Texture : PHYRIC,LOCALLY APHYRIC,2CM WIDE CHILLED MARGINS;
Structure : PILLOW BASALT,INTERVALS 0-42+42-75+75-110+110-140CM
REPRESENT INDIVIDUAL PILLOWS BOUNDED BY CHILLED
MARGINS,VEINS FILLED BY CALCITE;
Alteration : MOD
GRAY TO GRAY-VIOLET BASALT ALTERED TO YELLOW-BROWN
OR LIGHT GRAY-BROWN NEAR MARGINS;
Phenocrysts: PLAGIOCLASE
Size(mm): TO 10
RANGE FROM 0.5-1.0MM NEAR MARGINS TO 10MM IN
PILLOW INTERIORS;
Replacement: CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/1270 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 386.27
Core: 42 Top of Core Depth (m) : 379.00
Sect: 5 Top of Section Depth(m): 385.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT & INTERPILLOW BRECCIA;
PILLOW BASALT,ALTERED;
Piece No. : PCES 1 (4-5), 2 (7-20), 3 (23-54), 4 (60-93),
5 (98-100), 6 (104-107), 7 (111-116), 8 (118-127);
Texture : PHYRIC,CHILLED MARGINS & MINOR INTERPILLOW BRECCIA;
Structure : PILLOW BASALT,INTERVALS 8-55+55-95CM REPRESENT
INDIVIDUAL PILLOWS BOUNDED BY CHILLED MARGINS,VEINS
FILLED BY CALCITE;
Alteration : MOD
GRAY BASALT ALTERED TO GRAY-VIOLET,YELLOW-BROWN
ALONG VEINLETS & MARGINS,PLAG & CPX PHENOS
ALTERED;
Comments : BRECCIA IN PCES 1+6+7 CONSISTS OF YELLOW-BROWN TO
YELLOW-GREEN FRAGMENTS OF ALTERED BASALT(THE LATTER
ALTERED TO PALAG) IN A GREEN MATRIX OF PLAG
FRAGMENTS CEMENTED BY SMEC & CALCITE;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <3
CLINOPYROXENE ( 10%)
Size(mm): <1
OLIVINE ( 1%)
Size(mm): <1
REPLACED BY IDDINGS;
Replacement: IDDINGSITE
Minerals Replaced: OL
CALCITE
PALAGONITE
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 387.98
Core: 42 Top of Core Depth (m) : 379.00
Sect: 6 Top of Section Depth(m): 386.50
LITHOLOGY: PLAG PHYRIC BASALT & BRECCIA;
ALTERED;
Piece No. : PCES 1 (2-16), 2A (18-26), 2B (25-40), 3 (44-57),
4 (60-66), 8 (123-134);
Texture : PHYRIC,CHILLED MARGINS,MINOR BRECCIA IN PCES 2A+4+8;
Structure : TINY VEINLETS OF CALCITE;
Alteration : SLIGHTLY
PHENOS ALTERED;
Comments : GRAY-BROWN BASALT,BRECCIA COMPOSED OF GREEN
FRAGMENTS OF BASALTIC GLASS ALTERED TO PALAG IN A
MATRIX OF CALCITE & ANAL;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <5
MAFIC ( 10%)
Size(mm): <0.4
Replacement: CALCITE
PALAGONITE
Minerals Replaced: GLASS
ANAL
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 387.98
Core: 42 Top of Core Depth (m) : 379.00
Sect: 6 Top of Section Depth(m): 386.50
LITHOLOGY: PYX-PLAG PHYRIC BASALT & BRECCIA;
ALTERED;
Piece No. : PCES 5 (69-92), 6A (94-98), 6B (98-110),
7 (111-119), 9 (136-150);
Texture : PHYRIC,CHILLED MARGINS,BRECCIA IN PCES 7+9;
Structure : VEINS FILLED BY CALCITE & ANAL;
Alteration : MOD
GRAY-VIOLET BASALT LOCALLY ALTERED(PCE 6A) ALTERED
TO YELLOW-BROWN;
Comments : BRECCIA COMPOSED OF GREEN FRAGMENTS OF BASALTIC
GLASS ALTERED TO PALAG IN A MATRIX OF CALCITE &
ANAL;
Phenocrysts: PYROXENE (20-25%)
Size(mm): <3
PLAGIOCLASE ( RARE%)
RARE PLAG PHENOS;
Replacement: CALCITE
ANAL
PALAGONITE
Minerals Replaced: GLASS
Leg : 51 Top/Bottom Interval(mm): 0/1420 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 389.42
Core: 42 Top of Core Depth (m) : 379.00
Sect: 7 Top of Section Depth(m): 388.00
LITHOLOGY: PYX-PLAG-OL PHYRIC BASALT & BRECCIA;
PILLOW BASALT,ALTERED;
Piece No. : PCES 1 (2-12), 2A (17-32), 2B (32-40), 3 (42-47),
4A (50-62), 4B (62-70), 5 (73-75), 6A (78-101),
6B (101-142);
Texture : PHYRIC,CHILLED MARGINS & MINOR BRECCIA IN PCES
2B+4-5;
Alteration : MOD
PCES 2B-5;
SLIGHTLY
PCES 2A+6B;
FRESH
PCES 1+6A;
GRAY TO GRAY-VIOLET BASALT ALTERED TO YELLOW-BROWN
NEAR MARGINS;
Comments : BRECCIA COMPOSED OF GREEN PALAG FRAGMENTS IN A
MATRIX OF CALCITE & GREEN SMEC;
Phenocrysts: PYROXENE ( 25%)
Size(mm): <2
ALTERED TO SMEC;
PLAGIOCLASE ( RARE%)
RARE,LOWER END OF PCE 6B LARGE PLAG PHENOS APPEAR;
OLIVINE ( 1%)
Size(mm): <1
ALTERED;
Replacement: SMECTITE
Minerals Replaced: PYX
CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/1310 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 389.81
Core: 43 Top of Core Depth (m) : 388.50
Sect: 1 Top of Section Depth(m): 388.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
MASSIVE;
Piece No. : PCES 1A (5-55), 1B (54-71), 1C (72-92), 2 (95-131);
Texture : PHYRIC,HOLOXTLLINE GNDMASS;
Structure : MASSIVE,VEINS FILLED BY CALCITE +- GREEN TO BROWN
SMEC;
Alteration : SLIGHTLY
Phenocrysts: MAFIC ( 8-9%)
Size(mm): <3
OLIVINE ( 1-2%)
Size(mm): <3
PCE 2;
PLAGIOCLASE ( 7%)
Size(mm): <5
Replacement: CALCITE
SMECTITE
Leg : 51 Top/Bottom Interval(mm): 0/ 410 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 390.41
Core: 43 Top of Core Depth (m) : 388.50
Sect: 2 Top of Section Depth(m): 390.00
LITHOLOGY: PLAG PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1A (3-41);
Texture : PHYRIC,DISTINCTIVE FLUIDALITY IS EXPRESSED WITH
BANDED DISTRIBUTIONS OF PHENOS & ORIENTATION OF
FISSURES,GNDMASS APHANITIC AT THE TOP OF PCE 1;
Structure : PILLOW BASALT,CALCITE VEINS,FISSURES;
Alteration : MOD
STRONGLY ALTERED MARGINS;
Comments : GNDMASS VIOLETISH-GRAY TO YELLOWISH-BROWN IN
MARGINAL ZONE(TOP END) & ALONG CALCITE VEINLETS;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): 3
MAFIC ( 7%)
Size(mm): <0.5
Replacement: CALCITE
Leg : 51 Top/Bottom Interval(mm): 400/1410 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 391.41
Core: 43 Top of Core Depth (m) : 388.50
Sect: 2 Top of Section Depth(m): 390.40
LITHOLOGY: PLAG PHYRIC BASALT & BRECCIA;
Piece No. : PCES 1B (40-61), 2 (64-106), 3A (109-119),
3B (120-141);
Texture : PHYRIC,COARSE BRECCIA,PILLOW MARGINS,GNDMASS
APHANITIC AT THE BOTTOM OF PCE 1 & IN PCE 3;
Alteration : SLIGHTLY
PCES 1B+2;
FRESH
PCES 3A-3B;
Comments : PCE 2 CONSISTS OF A COARSE BRECCIA COMPOSED OF LARGE
ANGULAR BASALT FRAGMENTS IN A BASALT MATRIX,BOTH CUT
BY CALCITE VEINS;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <4
IRREGULARLY DISTRIBUTED;
MAFIC ( 7-10%)
Size(mm): <0.5
Replacement: CALCITE
SMECTITE
HEMATITE
Leg : 51 Top/Bottom Interval(mm): 0/ 720 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 392.22
Core: 43 Top of Core Depth (m) : 388.50
Sect: 3 Top of Section Depth(m): 391.50
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
TRANSITIONAL BETWEEN BASALT & DIABASE,GRADES
DOWNWARD TO DIABASE,MASSIVE;
Piece No. : PCES 1A (3-32), 1B (30-51), 1C (52-64), 1D (62-72);
Texture : PHYRIC,GNDMASS INCREASINGLY COARSE-GRAINED WITH
DEPTH,LOCALLY GLOMEROPORPHYRITIC;
Structure : MASSIVE,VEINLETS OF CALCITE +- GREEN-TO-BROWN SMEC;
Alteration : SLIGHTLY
Comments : GRAY GNDMASS;
Phenocrysts: PLAGIOCLASE (15-20%)
Size(mm): <4
COMBINATION (10-20%)
Size(mm): <1
CPX & OL,OL REPLACED BY SMEC;
Replacement: SMECTITE
GREEN-TO-BROWN;
CALCITE
Leg : 51 Top/Bottom Interval(mm): 720/1250 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 392.75
Core: 43 Top of Core Depth (m) : 388.50
Sect: 3 Top of Section Depth(m): 392.22
LITHOLOGY: PLAG MOD PHYRIC DIABASE;
Piece No. : PCES 2A (75-85), 2B (85-98), 2C (100-113),
2D (113-125);
Texture : MOD PHYRIC,FINE-GRAINED;
Alteration : FRESH
Comments : GRAY MATRIX;
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): <4
Leg : 51 Top/Bottom Interval(mm): 0/1370 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 394.37
Core: 43 Top of Core Depth (m) : 388.50
Sect: 4 Top of Section Depth(m): 393.00
LITHOLOGY: PLAG-CPX-OL MOD PHYRIC DIABASE;
Piece No. : PCES 1A (4-35), 1B (36-70), 1C (68-79), 1D (80-92),
1E (90-101), 1F (101-115), 2 (117-137);
Texture : MOD PHYRIC,HOLOXTLLINE GNDMASS WHICH INCREASED IN
GRAINSIZE FROM FINE-TO-MEDIUM-GRAINED WITH DEPTH;
Structure : MASSIVE,VEINS FILLED BY CALCITE;
Alteration : SLIGHTLY
Phenocrysts: PLAGIOCLASE ( <5%)
Size(mm): <2
COMBINATION ( <2%)
Size(mm): <2
CPX & OL,OL REPLACED BY SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/ 510 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 395.01
Core: 43 Top of Core Depth (m) : 388.50
Sect: 5 Top of Section Depth(m): 394.50
LITHOLOGY: LABRADOR-CPX-OL MOD PHYRIC DOLERITE;
Piece No. : PCES 1 (4-26), 2 (30-51);
Texture : MOD PHYRIC,FINE-TO-MEDIUM-GRAINED,HOLOXTLLINE
GNDMASS;
Structure : MASSIVE;
Alteration : SLIGHTLY
Comments : GRAY GNDMASS;
Phenocrysts: LABRADORITE ( 3%)
Size(mm): TO 6
CLINOPYROXENE
OLIVINE
OL REPLACED BY SMEC;
Replacement: SMECTITE
Leg : 51 Top/Bottom Interval(mm): 0/1370 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 395.87
Core: 44 Top of Core Depth (m) : 394.50
Sect: 1 Top of Section Depth(m): 394.50
LITHOLOGY: PLAG MOD PHYRIC DOLERITE;
Piece No. : PCES 1 (4-6), 1A (9-22), 1A2 (15-23), 1B1 (24-29),
1B2 (23-27), 1B3 (27-37), 1C (39-52), 1C1 (41-46),
1D1 (47-64), 1D2 (64-79), 1E (68-82), 1F (82-92),
1G (93-96), 1H (96-97), 1IA (98-102), 1IB (101-107),
2A (110-111), 2B (111-120), 2C1 (120-125),
2C2 (125-132), 2D (131-137);
Texture : MOD PHYRIC,HOLOXTLLINE GNDMASS WHICH INCREASES IN
GRAINSIZE FROM FINE-TO-MEDIUM-GRAINED WITH DEPTH;
Structure : MASSIVE,VEINS FILLED BY SMEC & CALCITE +- PYR;
Alteration : SLIGHTLY
Comments : THREE WELL-ROUNDED PEBBLES AT TOP OF SECTION ALTERED
TO PALE BROWN & YELLOW-BROWN OR OLIVE GRAY;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <4
Groundmass : PLAGIOCLASE
CLINOPYROXENE
OLIVINE
MINOR OL,REPLACED BY SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
NATROLITE
ID NATROL UNCERTAIN;
INTERVAL 25-35CM CONTAINS SMEC & NATROL(?);
CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/1400 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 397.40
Core: 44 Top of Core Depth (m) : 394.50
Sect: 2 Top of Section Depth(m): 396.00
LITHOLOGY: PLAG MOD PHYRIC DOLERITE;
Piece No. : PCES 1A (3-24), 1B (25-32), 1C (30-36), 1D (36-42),
2A (59-72), 2B (54-60), 2C (59-72), 2D (73-80),
3 (83-90), 4A (94-101), 4B (100-110), 4C (109-114),
4D (113-140);
Texture : MOD PHYRIC,GRADES TO SPARSELY PHYRIC AT PCE 2C,
HOLOXTLLINE GNDMASS WHICH INCREASES IN GRAINSIZE
FROM FINE-TO-MEDIUM-GRAINED WITH DEPTH;
Structure : MASSIVE,VEINS FILLED BY CALCITE,LARGE VEIN BETWEEN
95-105CM FILLED BY CALCITE & SMEC & PYR;
Alteration : SLIGHTLY
Phenocrysts: PLAGIOCLASE ( 1-3%)
Size(mm): <4
Groundmass : PLAGIOCLASE
CLINOPYROXENE
OLIVINE
MINOR OL,REPLACED BY SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 398.97
Core: 44 Top of Core Depth (m) : 394.50
Sect: 3 Top of Section Depth(m): 397.50
LITHOLOGY: PLAG SPARSELY PHYRIC DOLERITE;
Piece No. : PCES 1A (4-31), 1B (32-40), 1C (38-66), 1D (67-76),
1E (75-80), 1F (81-88), 1G (86-92), 1H (91-113),
1J (117-147), 1K (138-149);
Texture : SPARSELY PHYRIC,MEDIUM-GRAINED GNDMASS WHICH
INCREASES IN GRAINSIZE WITH DEPTH;
Structure : MASSIVE,VEINS IN PCES 1E+1J-1K FILLED BY DARK GREEN
SMEC & PYR +- CALCITE;
Alteration : SLIGHTLY
Phenocrysts: PLAGIOCLASE ( 2%)
Size(mm): <7
Groundmass : PLAGIOCLASE
CLINOPYROXENE
OLIVINE
MINOR OL,REPLACED BY SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
DARK GREEN;
CALCITE
Leg : 51 Top/Bottom Interval(mm): 0/ 370 Analyst: Rusinov, V.
Hole: 417A Sample Midpoint (m) : 399.37
Core: 44 Top of Core Depth (m) : 394.50
Sect: 4 Top of Section Depth(m): 399.00
LITHOLOGY: APHYRIC DOLERITE;
Piece No. : PCES 1A (4-27), 1B (26-34), 1C (33-37);
Texture : APHYRIC,MEDIUM-GRAINED,IRREGULAR PATCHES OF CALCITE
& SMEC;
Structure : MASSIVE;
Alteration : SLIGHTLY
Vesicles :
Location: Filling: CALCITE
Phenocrysts: ( 0%)
Groundmass : PLAGIOCLASE
CLINOPYROXENE
OLIVINE
MINOR OL REPLACED BY SMEC;
Replacement: CALCITE
SMECTITE
Minerals Replaced: OL
Leg : 51 Top/Bottom Interval(mm): 0/ 400 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 407.90
Core: 46 Top of Core Depth (m) : 407.50
Sect: 1 Top of Section Depth(m): 407.50
LITHOLOGY: PLAG-CPX PHYRIC DOLERITE;
Piece No. : PCES 1 (3-10), 2 (13-28), 3 (20-32), 4 (35-40);
Texture : PHYRIC,MEDIUM-GRAINED GNDMASS;
Structure : MASSIVE;
Alteration : MOD
Phenocrysts: PLAGIOCLASE ( 30%)
Size(mm): <7
CLINOPYROXENE ( 20%)
Size(mm): <3
Groundmass : PLAGIOCLASE
CLINOPYROXENE
OLIVINE
FRESH OL;
Leg : 51 Top/Bottom Interval(mm): 400/1470 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 408.97
Core: 46 Top of Core Depth (m) : 407.50
Sect: 1 Top of Section Depth(m): 407.90
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT & BRECCIA;
PILLOW BASALT;
Piece No. : PCES 5A (42-52), 5B (53-63), 6 (60-70), 7 (73-79),
8A (83-90), 8B (90-101), 9 (105-107), 10 (111-117),
12 (135-147);
Texture : PHYRIC,CHILLED MARGINS & INTRUSION(?) BRECCIA,BASALT
GNDMASS IN BOTH PILLOWS & BRECCIA FRAGMENTS
APHANITIC TO MICROLITIC;
Structure : PILLOW BASALT,VEINS FILLED BY CALCITE & SMEC;
Alteration : MOD
PHENOS IN BRECCIA STRONGLY ALTERED;
Comments : BRECCIA COMPOSED OF CALCITE(LOCALLY SCALENOHEDRAL) &
GREEN SMEC;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <3
COMBINATION ( 3%)
Size(mm): <2
CPX & OL;
Replacement: CALCITE
SMECTITE
Leg : 51 Top/Bottom Interval(mm): 0/1480 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 410.48
Core: 46 Top of Core Depth (m) : 407.50
Sect: 2 Top of Section Depth(m): 409.00
LITHOLOGY: BASALTIC BRECCIA;
PLAG PHYRIC BASALT FRAGMENTS;
PILLOW BASALT;
Piece No. : PCES 1 (2-10), 2 (12-18), 3 (20-30), 4 (32-35),
5 (39-48), 6 (50-55), 7 (57-61), 8 (64-78),
9 (72-76), 10 (79-83), 11A (85-90), 11B (90-100),
12 (102-107), 13 (110-115), 14 (118-127),
15 (135-141), 16 (143-148);
Texture : VOLCANIC BRECCIA COMPOSED OF PHYRIC PILLOW BASALT
FRAGMENTS IN A MATRIX OF CALCITE & GREEN SMEC,
CHILLED MARGINS,BASALT GNDMASS MICROXTLLINE,LOCALLY
GLASSY;
Structure : PILLOW BASALT FRAGMENTS;
Alteration : MOD
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <3
MAFIC ( 5%)
Size(mm): <2
Groundmass : CALCITE IN MATRIX LOCALLY COARSELY XTLLINE;
Replacement: CALCITE
SMECTITE
Leg : 51 Top/Bottom Interval(mm): 0/1470 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 411.97
Core: 46 Top of Core Depth (m) : 407.50
Sect: 3 Top of Section Depth(m): 410.50
LITHOLOGY: BASALTIC BRECCIA;
PLAG PHYRIC BASALT FRAGMENTS;
PILLOW BASALT;
Piece No. : PCES 1 (2-5), 2 (7-13), 3 (15-26), 4 (29-35),
5A (36-42), 5B (42-45), 6 (48-52), 7 (55-60),
8 (62-68), 9 (70-75), 10 (77-88), 11 (90-96),
12 (98-105), 13 (107-112), 14 (115-120),
15 (121-125), 16 (126-133), 17 (135-140),
18 (142-147);
Texture : VOLCANIC BRECCIA COMPOSED OF CHILLED PHYRIC PILLOW
BASALT FRAGMENTS OFTEN WITH STRONGLY ALTERED
MARGINS,BASALT GNDMASS MICROXTLLINE TO APHANITIC;
Structure : PILLOW BASALT FRAGMENTS;
Alteration : MOD
STRONGLY ALTERED MARGINS;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <4
MAFIC ( 5%)
Size(mm): <2
Groundmass : CALCITE
SMECTITE
Replacement: CALCITE
SMECTITE
Leg : 51 Top/Bottom Interval(mm): 0/ 770 Analyst: Ui, Tadahide
Hole: 417A Sample Midpoint (m) : 412.77
Core: 46 Top of Core Depth (m) : 407.50
Sect: 4 Top of Section Depth(m): 412.00
LITHOLOGY: BASALTIC BRECCIA;
PLAG-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCES 1 (2-5), 2 (8-13), 3 (15-20), 4 (25-27),
5 (31-35), 6 (39-48), 7 (52-55), 8 (57-62),
9 (65-70), 10 (73-77);
Texture : VOLCANIC BRECCIA COMPOSED OF PHYRIC PILLOW BASALT
FRAGMENTS OFTEN WITH STRONGLY ALTERED CHILLED
MARGINS,BASALT GNDMASS APHANITIC TO MICROXTLLINE;
Structure : PILLOW BASALT,PCE 10 CONTAINS A LARGE CAVITY FILLED
BY CALCITE & ZEOL;
Alteration : MOD
Vesicles : Size(mm): <8 Percent: 10
Location: Filling: CALCITE
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <2
CLINOPYROXENE ( 5-10%)
Size(mm): <1
Groundmass : CALCITE
SMECTITE
Replacement: CALCITE
SMECTITE
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