Leg : 49 Top/Bottom Interval(mm): 0/ 200 Analyst: Zolotarev, B.
Hole: 408 Sample Midpoint (m) : 323.20
Core: 35 Top of Core Depth (m) : 323.00
Sect: 1 Top of Section Depth(m): 323.00
LITHOLOGY: SEDIMENT (SAND);
Leg : 49 Top/Bottom Interval(mm): 210/ 310 Analyst: Zolotarev, B.
Hole: 408 Sample Midpoint (m) : 323.31
Core: 35 Top of Core Depth (m) : 323.00
Sect: 1 Top of Section Depth(m): 323.21
LITHOLOGY: SEDIMENT (GRAVEL);
Leg : 49 Top/Bottom Interval(mm): 310/ 400 Analyst: Zolotarev, B.
Hole: 408 Sample Midpoint (m) : 323.40
Core: 35 Top of Core Depth (m) : 323.00
Sect: 1 Top of Section Depth(m): 323.31
LITHOLOGY: TUFF;
Piece No. : PCE 1 (31-40);
Texture : FINE-GRAINED;
Alteration : MOD;
Comments : CONTAINS SMALL FRAGMENTS OF ALTERED BASALT AND PYX
AND PLAG, COLOR 2.5YR4/3;
Phenocrysts: PYROXENE
PLAGIOCLASE
Leg : 49 Top/Bottom Interval(mm): 410/ 480 Analyst: Zolotarev, B.
Hole: 408 Sample Midpoint (m) : 323.48
Core: 35 Top of Core Depth (m) : 323.00
Sect: 1 Top of Section Depth(m): 323.41
LITHOLOGY: TUFF;
Piece No. : PCE 1 (41-48);
Texture : MEDIUM-GRAINED;
Alteration : MOD;
Comments : CONTAINS SMALL FRAGMENTS OF ALTERED BASALT AND PYX
AND MORE PLAG THAN PCE 1, COLOR 2.5YR4/3;
Vesicles : VESICLES;
Phenocrysts: PYROXENE
PLAGIOCLASE
Leg : 49 Top/Bottom Interval(mm): 490/ 600 Analyst: Zolotarev, B.
Hole: 408 Sample Midpoint (m) : 323.60
Core: 35 Top of Core Depth (m) : 323.00
Sect: 1 Top of Section Depth(m): 323.49
LITHOLOGY: BASALTIC GRAVEL;
Piece No. : PCE 3 (49-60);
Leg : 49 Top/Bottom Interval(mm): 620/1370 Analyst: Zolotarev, B.
Hole: 408 Sample Midpoint (m) : 324.37
Core: 35 Top of Core Depth (m) : 323.00
Sect: 1 Top of Section Depth(m): 323.62
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 4A (62-65), 4B (66-71), 4C (72-77), 5 (79-86),
6 (87-97), 7 (99-106), 8 (110-117), 9 (119-127),
10 (129-137);
Texture : APHYRIC, ZONE OF 2.5YR/0 GLASS IN 4A;
Structure : CALCITE VEIN IN PCE 8;
Alteration : MOD;
Comments : GNDMASS 10YR6/1 IN PCES 5+6+7, FRAGMENT OF SEDIMENT
IN PCE 4A;
Vesicles : Size(mm): 0.5-4 Percent: 1-3
IN PCES 4A+4C+4C, VESICLES DISTRIBUTED UNEVENLY;
Size(mm): 1 Percent:
Location: Filling: CALCITE
IN PCES 8-10, SOME VESICLES FILLED WITH CALCITE;
Replacement: CALCITE
Leg : 49 Top/Bottom Interval(mm): 0/1410 Analyst: Zolotarev, B.
Hole: 408 Sample Midpoint (m) : 333.91
Core: 36 Top of Core Depth (m) : 332.50
Sect: 1 Top of Section Depth(m): 332.50
LITHOLOGY: OL SPARSELY PHYRIC BASALT;
Piece No. : PCE 1 (0-10), 2 (11-20), 3 (22-29), 6 (48-56),
7 (57-62), 8 (63-68), 9 (70-76), 10A (79-86),
10B (85-105), 10C (105-120), 10D (120-125),
10E (132-141);
Texture : SPARSELY PHYRIC, MEDIUM-GRAINED;
Structure : CALCITE VEINS IN PCES 2+3+10A+10B;
Alteration : MOD
OL ALTERED TO RED BROWN MINERALS;
Comments : GNDMASS IS 107R6/1;
Vesicles : Size(mm): 0.3-0.5 Percent: 1
Location: Filling: CALCITE
VESICLE-RICH ZONES IN PCES 10B+10E, SOME
VESICLES FILLED WITH CALCITE ESPECIALLY NEAR
VEINS OF CALCITE;
Phenocrysts: OLIVINE
MICROPHENOS, ALTERED;
Replacement: CALCITE
Leg : 49 Top/Bottom Interval(mm): 0/1410 Analyst: Zolotarev, B.
Hole: 408 Sample Midpoint (m) : 333.91
Core: 36 Top of Core Depth (m) : 332.50
Sect: 1 Top of Section Depth(m): 332.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 4 (32-38), 5 (40-46);
Texture : APHYRIC, FINE-GRAINED, MICROPHENOS OF OL PRESENT;
Alteration : MOD;
Vesicles : Size(mm): TO 2 Percent: 3-5
VESICULAR;
Groundmass : OLIVINE
Replacement: OTHER
Minerals Replaced: OL
RED-BROWN MINERALS;
Leg : 49 Top/Bottom Interval(mm): 0/1500 Analyst: Zolotarev, B.
Hole: 408 Sample Midpoint (m) : 335.50
Core: 36 Top of Core Depth (m) : 332.50
Sect: 2 Top of Section Depth(m): 334.00
LITHOLOGY: OL SPARSELY PHYRIC BASALT;
Piece No. : PCE 1A (2-9), 1B (10-18), 1C (19-25), 1D (25-40),
1E (40-54), 1F (55-60), 1G (61-70), 1H (70-77),
1I (78-85), 1J (85-93), 1K (94-97), 1L (98-102),
1M (103-110), 1N (110-119), 1O (120-128),
2 (130-137), 3 (140-148);
Texture : SPARSELY PHYRIC, MEDIUM-GRAINED, MICROPHENOS
ESPECIALLY NEAR VEINS;
Structure : CALCITE VEINS IN PCES 1B-1F AND 1M+1N;
Alteration : MOD;
Comments : GNDMASS COLOR 10YR6/1;
Vesicles : Size(mm): TO 2 Percent: 1-3
Location: Filling: CALCITE
VESICLULAR, VESICLE SIZE 0.5MM, VESICLE-RICH
ZONES IN PCES 1B+1C+1J+1K+1L1M HAVE VESICLES
UP TO 2MM, SOME OF VESICLES FILLED WITH CALCITE
CALCITE AND SOME WITH A DARK MINERAL;
Phenocrysts: OLIVINE
MICROPHENOS OF ALTERED OL;
Replacement: CALCITE
Leg : 49 Top/Bottom Interval(mm): 0/1500 Analyst: Zolotarev, B.
Hole: 408 Sample Midpoint (m) : 337.00
Core: 36 Top of Core Depth (m) : 332.50
Sect: 3 Top of Section Depth(m): 335.50
LITHOLOGY: OL SPARSELY PHYRIC BASALT;
Piece No. : PCE 1 (0-10), 2 (10-25), 3 (26-35), 4 (36-51),
5 (52-59), 6 (60-71), 7A (72-78), 7B (79-86),
8A (89-97), 8B (98-105), 9 (108-117), 10A (119-127),
10B (127-135), 11 (138-148);
Texture : SPARSELY PHYRIC, MEDIUM-GRAINED;
Structure : CALCITE VEINS IN PCES 2+4+5+9+10A+10B;
Alteration : MOD;
Comments : GNDMASS COLOR IS 10YR6/1;
Vesicles : Size(mm): 0.3-0.5 Percent:
SIZE UP TO 3MM, IN PCES 5+8B+9;
VESICLE ENRICHED ZONES IN PCES 5+8B+9;
Phenocrysts: OLIVINE
MICROPHENOS OF ALTERED OL;
Replacement: CALCITE
Leg : 49 Top/Bottom Interval(mm): 0/1500 Analyst: Zolotarev, B.
Hole: 408 Sample Midpoint (m) : 338.50
Core: 36 Top of Core Depth (m) : 332.50
Sect: 4 Top of Section Depth(m): 337.00
LITHOLOGY: OL SPARSELY PHYRIC BASALT;
Piece No. : PCE 1 (0-6), 2 (8-11), 3A (13-18), 3B (19-29),
3C (30-40), 4 (42-50), 5 (50-58), 6 (60-66),
7 (68-80), 8 (82-90), 9 (92-103), 10 (104-111),
11 (113-137), 12 (140-148);
Texture : SPARSELY PHYRIC, MEDIUM-GRAINED;
Structure : CALCITE VEINS IN PCES 2+9+12;
Alteration : MOD
OL ALTERED TO YELLOW-RED MINERAL;
Comments : GNDMASS COLOR 10YR6/1;
Vesicles : Size(mm): 0.3-3 Percent:
Location: Filling: CALCITE
VESICLE RICH ZONES IN PCES 3A+4+9, SOME FILLED
WITH CALCITE;
Phenocrysts: OLIVINE
MICROPHENOS OF ALTERED OL;
Replacement: CALCITE
Leg : 49 Top/Bottom Interval(mm): 0/ 650 Analyst: Zolotarev, B.
Hole: 408 Sample Midpoint (m) : 339.15
Core: 36 Top of Core Depth (m) : 332.50
Sect: 5 Top of Section Depth(m): 338.50
LITHOLOGY: OL SPARSELY PHYRIC BASALT;
Piece No. : PCE 1 (1-10), 2A (12-20), 2B (20-28), 3 (30-39),
4A (40-55), 4B (55-65);
Texture : SPARSELY PHYRIC, MEDIUM-GRAINED;
Structure : VEINS OF CALCITE IN PCES 1 AND 2 AND 4A;
Alteration : MOD;
Comments : GNDMASS COLOR IS 10YR6/1;
Vesicles : Size(mm): 2-3 Percent:
Location: Filling: CALCITE
VESICULAR, SOME FILLED WITH CALCITE;
Phenocrysts: OLIVINE
Replacement: CALCITE
Leg : 49 Top/Bottom Interval(mm): 0/1500 Analyst: Wood, D.
Hole: 408 Sample Midpoint (m) : 344.50
Core: 37 Top of Core Depth (m) : 343.00
Sect: 1 Top of Section Depth(m): 343.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (0-10), 2 (10-20), 3 (21-37), 4 (37-45),
5 (46-56), 6 (57-65), 7 (65-72), 8 (73-80),
9 (82-88), 10 (89-94), 11 (95-103), 12 (104-112),
13 (112-131), 14 (132-142), 15 (143-150);
Texture : APHYRIC, SUBVARIOLITIC;
Alteration : MOD
VARYING DEGREES OF HYDROTHERMAL ALTERATION, PCES
PCES 1-3 FE-STAINED & MORE OXIDIZED THAN THE REST-
OXIDATION IS SYMMETRICAL ABOUT CONTACT ZONE;
Comments : CONTACT ZONE BETWEEN PCES 2+3 WHICH IS REPLACED BY
IRON OXIDE, CONTACT EXPOSED IN PCE 15 WHERE BAKED
SEDIMENT IS IN CONTACT WITH BASALT, GNDMASS COLOR IS
2.5YR5/1(BLUE-GRAY), VARYING DEGREES OF HYDROTHERMAL
ALTERATION;
Vesicles : MOSTLY NON-VESICULAR, VESICLE ZONES SYMMETRICALLY
ORIENTED ABOUT CONTACT ZONE, PCE 14 IS VESICULAR,
VESICLE TRAIL LEFT BY RISING GAS BUBBLES IN PCE
13;
Location: Filling:
Shape : PIPE
SINGLE ELONGATE PIPE VESICLES IN PCE 13;
Leg : 49 Top/Bottom Interval(mm): 0/1500 Analyst: Wood, D.
Hole: 408 Sample Midpoint (m) : 346.00
Core: 37 Top of Core Depth (m) : 343.00
Sect: 2 Top of Section Depth(m): 344.50
LITHOLOGY: BASALT;
Piece No. : PCE 1 (0-7), 2 (8-13), 3 (13-18), 4 (19-24),
5 (25-34), 6 (34-40), 7 (40-46), 8 (46-54),
9 (54-63), 10 (63-70), 11 (70-80), 12 (80-86),
13 (86-94), 14 (94-101), 15 (102-110), 16 (110-118),
17 (118-125), 18 (125-135), 19 (136-142),
20 (142-150);
Texture : CHILLED BASALT VISIBLE IN 3 PCES, COARSE-GRAINED
BASALT IN PCES 17 AND 18 IS VISIBLY VARIOLITIC;
Alteration : EXT
Comments : BASALT IS SIGNIFICANTLY HYDROTHERMALLY ALTERED,
GNDMASS COLOR IS 2.5YR5/1(BLUE-GRAY), SEEMS
POSSIBLE THAT SOME OF CONTACTS REPRESENT SAME FLOW-
SEDIMENT INTERFACE, CONTACTS OCCUR IN PCES 5+7+10-11
+16, BAKED SEDIMENTS VISIBLE IN 3 PCES, PYRITE
PRESENT AND COMMON IN BAKED SEDIMENTS;
Vesicles :
Location: Filling: CALCITE,ZEOLITE
HIGHLY VESICULAR, CALCITE AND ZEOLITE? FILL SOME
VESICLES AND LINE MANY OTHERS;
Replacement: CALCITE
ZEOLITE
ID UNCERTAIN;
PYRITE
Leg : 49 Top/Bottom Interval(mm): 0/1400 Analyst: Wood, D.
Hole: 408 Sample Midpoint (m) : 347.40
Core: 37 Top of Core Depth (m) : 343.00
Sect: 3 Top of Section Depth(m): 346.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (0-9), 2 (10-17), 3 (17-23), 4 (23-30),
5 (31-40), 6 (40-49), 7 (50-56), 8 (56-63),
9 (63-71), 10 (71-76), 11 (76-81), 12 (82-90),
13 (91-95), 14 (95-102), 15 (102-108), 16 (110-115),
17 (115-125), 18 (125-132), 19 (132-140);
Texture : APHYRIC, SUB-VARIOLITIC, GRAIN SIZE SHOWS A NOTABLE
VARIATION ACROSS SECTION, PCES 1-7 AND 15-19
COARSE-GRAINED, PCES 8-16 FINE-GRAINED, TEXTURAL
DIFFERENCES MIGHT BE BECAUSE OF DEGASSING WITHIN
A SINGLE FLOW RELATED TO PRESSURE AND VISCOSITY OR
BECAUSE THE SECTIONS ARE COMPOUND UNITS OF SAME
FLOW;
Alteration : SLIGHTLY
LESS ALTERED THAN PREVIOUS SECTIONS OF THIS CORE;
Vesicles :
Location: Filling: CALCITE
VESICULAR, FEW VESICLES FILLED BUT MOST LINED
WITH CALCITE, VESICULATION SHOWS NOTABLE VARIATION
ACROSS SECTION, VERY SMALL VESICLES ABUNDANT IN
PCES 1-7+15-19, PCES 8-16 HAVE FEWER BUT MUCH
LARGER VESICLES, LARGE CALCITE AMYGDULE IN PCE 2,
VESICLE TRAIL LEFT BY RISING GAS BUBBLES IN PCE 4;
Replacement: CALCITE
Leg : 49 Top/Bottom Interval(mm): 0/1500 Analyst: Wood, D.
Hole: 408 Sample Midpoint (m) : 353.00
Core: 38 Top of Core Depth (m) : 351.50
Sect: 1 Top of Section Depth(m): 351.50
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (0-10), 2 (10-17), 3 (18-24), 4 (25-32),
5 (32-37), 6 (38-44), 7 (45-51), 8 (52-60),
9 (60-65), 10 (66-74), 11 (74-80), 12 (81-86),
13 (87-93), 14 (94-101), 15 (102-109), 16 (110-120),
17 (121-125), 18 (126-130), 19 (131-140),
20 (140-150);
Texture : APHYRIC, PCES 1 AND 2 FINER GRAINED THAN REST WHICH
SHOW SUB-VARIOLITIC TEXTURE SEEN IN PREVIOUS CORES;
Structure : VEIN OF SMEC WITH PYRITE CUTS ACROSS PCE 8;
Alteration : MOD
Comments : VARYING DEGREES OF HYDROTHERMAL ALTERATION,
GNDMASS 2.5YR5/1(BLUE-GRAY), FLOW UNITS CANNOT BE
DISTINGUISHED IN THIN SECTION, APPEARS TO BE 1 FLOW
UNIT;
Vesicles :
Location: Filling: CALCITE
VESICULAR, SOME VESICLES FILLED WITH CALCITE, MOST
VESICLES ONLY LINED WITH SECONDARY MATERIAL,
LITTLE PATTERN IN THE DEGREE OF VESICULATION;
Replacement: CALCITE
SMECTITE
SMECTITE ABUNDANT;
PYRITE
Leg : 49 Top/Bottom Interval(mm): 0/1500 Analyst: Wood, D.
Hole: 408 Sample Midpoint (m) : 354.50
Core: 38 Top of Core Depth (m) : 351.50
Sect: 2 Top of Section Depth(m): 353.00
LITHOLOGY: APHYRIC BASALT;
Piece No. : PCE 1 (0-8), 2 (10-17), 3 (17-27), 4 (30-35),
5 (35-40), 6 (41-50), 7 (52-58), 8 (59-64),
9 (64-70), 10 (71-76), 11 (77-84), 12 (85-92),
13 (92-98), 14 (99-105), 15 (105-110), 16 (111-120),
17 (120-125), 18 (125-129), 19 (130-136),
20 (136-144), 21 (144-150);
Texture : APHYRIC, SUB-VARIOLITIC, PCES 1-4 AND 8-21 COARSE-
GRAINED, PCES 5-7 FINE-GRAINED (ALMOST GLASSY);
Alteration : MOD
Comments : GNDMASS COLOR IS BLUE-GRAY (2.5YR5/1), NO CONTACTS,
PCES SHOW HYDROTHERMAL ALTERATION;
Vesicles :
Location: Filling: CALCITE,ZEOLITE
VESICULAR TO VARIOUS DEGREES, SOME VESICLES
FILLED WITH CALCITE AND ZEOLITE AND OTHERS LINED
WITH SECONDARY MINERALS-GREEN MINERAL WITH
ROUNDED CRYSTALS IS COMMON, PCES 1-4 AND 8-21
VESICULAR, PCES 5-7 NOT VESICULAR;
Replacement: CALCITE
ZEOLITE
Leg : 49 Top/Bottom Interval(mm): 0/1500 Analyst: Wood, D.
Hole: 408 Sample Midpoint (m) : 356.00
Core: 38 Top of Core Depth (m) : 351.50
Sect: 3 Top of Section Depth(m): 354.50
LITHOLOGY: APHYRIC BASALT;
ALL PCES SIMILAR TO EACH OTHER AND TO THOSE OF
PREVIOUS 2 SECTIONS OF CORE 38;
Piece No. : PCE 1 (0-2), 2 (8-14), 3 (14-20), 4 (20-26),
5 (26-32), 6 (32-40), 7 (40-46), 8 (47-54),
9 (55-60), 10 (62-68), 11 (70-75), 12 (77-80),
13 (81-84), 14 (85-90), 15 (92-99), 16 (100-105),
17 (106-112), 18 (113-118), 19 (120-125),
20 (127-132), 21 (133-139), 22 (140-145),
23 (145-150);
Texture : APHYRIC, SUB-VARIOLITIC, FAIRLY COARSE-GRAINED;
Alteration : MOD
VARYING DEGREES OF SECONDARY ALTERATION;
Comments : GNDMASS COLOR IS 2.5YR/5.1-BLUE-GRAY;
Vesicles : VESICULAR, MOST VESICLES LINED ONLY WITH SECONDARY
MINERALS;
Replacement: CALCITE
ZEOLITE
SMECTITE
PYRITE
SMEC AND CALCITE AND ZEOLITE AND PYRITE OCCUR
IN THAT ORDER OF ABUNDANCE;
Leg : 49 Top/Bottom Interval(mm): 0/1050 Analyst: Wood, D.
Hole: 408 Sample Midpoint (m) : 357.05
Core: 38 Top of Core Depth (m) : 351.50
Sect: 4 Top of Section Depth(m): 356.00
LITHOLOGY: APHYRIC BASALT;
ALL PIECES SIMILAR TO OTHER SECTIONS OF CORE 38;
Piece No. : PCE 1 (0-6), 2 (6-11), 3 (11-19), 4 (20-24),
5 (25-33), 6 (33-41), 7 (42-49), 8 (50-55),
9 (56-62), 10 (62-70), 11 (72-77), 12 (78-85),
13 (87-92), 14 (93-98), 15 (99-105);
Texture : APHYRIC, SUB-VARIOLITIC, COARSE-GRAINED;
Alteration : MOD;
Comments : GNDMASS COLOR 2.5YR5/1(BLUE-GRAY);
Replacement: CALCITE
ZEOLITE
PYRITE
SMECTITE
SMEC AND CALCITE AND ZEOLITE AND PYRITE ARE
SECONDARY MINERALS THAT OCCUR IN THAT ORDER
OF ABUNDANCE;
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