Leg : 52 Top/Bottom Interval(mm): 200/ 640 Analyst:
Hole: 418A Sample Midpoint (m) : 320.64
Core: 15 Top of Core Depth (m) : 320.00
Sect: 1 Top of Section Depth(m): 320.20
LITHOLOGY: SEDIMENT;
Leg : 52 Top/Bottom Interval(mm): 200/ 640 Analyst:
Hole: 418A Sample Midpoint (m) : 320.64
Core: 15 Top of Core Depth (m) : 320.00
Sect: 1 Top of Section Depth(m): 320.20
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (20-43), 1B (43-49), 1C (50-57), 1D (58-61),
1E (62-64);
Texture : MODERATELY PHYRIC, VERY FINE-GRAINED, GLASSY
SELVAGES IN PCES 1C-E;
Structure : CARBONATE VEINS, SULFIDE VEINLETS, CALCITE VEIN ON
TOP OF PCE 1A YOUNGER THAN BASALT;
Alteration : MOD;
Comments : BASALT CONTACT AT 20CM;
Vesicles : VESICLES WITH CALCITE AND SMEC, FILLED WITH
SMEC IN PCES 1B-C, SMEC RIMS ON YOUNGER CARBONATE;
Groundmass : PYRITE
DISSEMINATED;
Phenocrysts: PLAGIOCLASE ( 3%)
Size(mm): TO 0.7
OLIVINE
MICROPHENOS;
Replacement: SMECTITE
Leg : 52 Top/Bottom Interval(mm): 650/1300 Analyst:
Hole: 418A Sample Midpoint (m) : 321.30
Core: 15 Top of Core Depth (m) : 320.00
Sect: 1 Top of Section Depth(m): 320.65
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1F (65-72), 1G (73-77), 1H (78-83), 1I (91-102),
1J (102-116), 1K1 (117-121), 1K (122-124),
1L (125-130);
Texture : MODERATELY PHYRIC, VERY FINE-GRAINED;
Structure : VEINLETS WITH CARBONATE + SMEC AND SULFIDE,
CALCITE VEIN WITH SMEC IN PCE 1K;
Alteration : EXTENSIVELY;
Vesicles : VESICLES FILLED WITH CARBONATE AND SMEC;
Groundmass : PYRITE
DISSEMINATED GRAINS;
PLAGIOCLASE
Size(mm): TO 0.8
Phenocrysts: PLAGIOCLASE ( <5%)
OLIVINE
COMPLETELY ALTERED MICROPHENOS;
Replacement: SMECTITE
Leg : 52 Top/Bottom Interval(mm): 1320/1480 Analyst:
Hole: 418A Sample Midpoint (m) : 321.48
Core: 15 Top of Core Depth (m) : 320.00
Sect: 1 Top of Section Depth(m): 321.32
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 2 (132-137), 3 (139-148);
Texture : MODERATELY PHYRIC, VERY FINE-GRAINED, GLASSY
SELVAGE ON BOTTOM OF PCE 3;
Structure : BRECCIATED CARBONATE VEIN WITH SMEC ON TOP OF
PCE 3;
Alteration : EXTENSIVELY;
Phenocrysts: PLAGIOCLASE
GLOMEROCRYSTS;
Replacement: SMECTITE
Leg : 52 Top/Bottom Interval(mm): 0/ 100 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 321.60
Core: 15 Top of Core Depth (m) : 320.00
Sect: 2 Top of Section Depth(m): 321.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1 (3-10);
Texture : MODERATELY PHYRIC, GLASSY;
Alteration : SLIGHTLY
Comments : PILLOW MARGIN WITH GLASS;
Leg : 52 Top/Bottom Interval(mm): 140/ 160 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 321.66
Core: 15 Top of Core Depth (m) : 320.00
Sect: 2 Top of Section Depth(m): 321.64
LITHOLOGY: SEDIMENT;
LIMESTONE;
Piece No. : PCE 2 (14-16);
Comments : IN CONTACT WITH GLASSY MARGIN;
Leg : 52 Top/Bottom Interval(mm): 200/1500 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 323.00
Core: 15 Top of Core Depth (m) : 320.00
Sect: 2 Top of Section Depth(m): 321.70
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 3 (20-26), 4 (30-35), 5A (39-49), 5B (50-58),
5C (58-63), 6 (66-71), 7 (74-77), 8 (81-92),
9 (95-97), 10A (100-109), 10B (110-118),
10C (119-125), 11 (128-133), 12 (136-139),
13 (141-150);
Texture : MODERATELY PHYRIC, FRESH GLASS IN PCES 8 AND 10;
Structure : SMEC VEIN IN PCE 3, SMEC AND PYRITE VEINS IN PCES
6-7, CALCITE AND SMEC VEINS (2CM WIDE AT 56-63CM,
PCE 8, 1CM WIDE IN PCE 10), CALCITE VEINS (TOP OF
PCE 4, PCE 11-12, PCE 13 BELOW 144CM), PYRITE VEINS
AND SEGREGATIONS;
Alteration : MOD
PCE 4, PCE 5A-B, PCE 8-10B;
EXTENSIVELY
PCE 3, PCE 5C-8, PCE 10C-12;
Comments : PCE 9 CONTAINS CALCITE-CEMENTED BRECCIA IN
SCIENTIFIC HALF AND FRESH BASALT IN ARCHIVE HALF,
CALCITE-CEMENTED BRECCIA ABOVE 144CM IN PCE 13,
BRECCIA CLASTS ARE BASALT AND MATRIX CONTAINS
CALCITE, IRON OXIDE, GREEN SMEC, PYRITE,
PRISMATIC XTLS OF ZEOLITE;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: SMEC
ALSO FILLED WITH CALCITE, CALCITE FILLED VUG IN
PCE 11;
Groundmass : PLAGIOCLASE
CLINOPYROXENE ( 0%)
Phenocrysts: OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
PLAGIOCLASE ( 4-5%)
Size(mm): TO 2
GLOMEROCRYSTS TO 6MM;
Replacement: SMECTITE
CALCITE
CALCITE PATCHES AT 45-50CM;
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 324.47
Core: 15 Top of Core Depth (m) : 320.00
Sect: 3 Top of Section Depth(m): 323.00
LITHOLOGY: PLAG-PYX MODERATELY PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A1 (1-3), 1A (3-17), 1B (19-29), 2A (31-40),
2B (40-53), 2C (54-59), 2D (60-68), 2E (68-78),
2F (78-81), 3A (84-86), 3B (86-91), 4A (93-110),
4B (110-118), 4C (119-121), 4D (122-147);
Texture : MODERATELY PHYRIC, GNDMASS FINE TO MEDIUM GRAINED
QUENCH TEXTURE, GLASSY MARGINS ALTERED TO SMEC,
HYALOCLASTIC BRECCIAS PCE 3B;
Structure : PILLOW BASALT;
Alteration : MOD;
Comments : INTERPILLOW GENERALLY GLASS BRECCIA CEMENTED BY
LARGE SPARRITIC CALCITE, LOCALLY INTERPILLOW IS A
FINE YELLOW CEMENTED SILT IN PCE 3B;
Vesicles : ABUNDANT, AMOEBOID FILLED WITH SMEC AND CALCITE
AND QUARTZ, SOME ROUNDED WITH CALCITE OR SMEC,
VUG 2X6CM AMOEBOID FILLED WITH QUARTZ;
Groundmass : PYROXENE
Size(mm): TO 6
LOCALLY MOTTLED WITH SOME PYRITE;
Phenocrysts: COMBINATION ( <10%)
PLAG+PYX, GLOMEROCRYSTS UP TO 6MM, NUMBER OF
PHENOS CHANGE FROM ONE PILLOW (PLAG 8%, PYX 2%)
TO ANOTHER (PLAG 3%, PYX 7%);
Leg : 52 Top/Bottom Interval(mm): 0/ 260 Analyst:
Hole: 418A Sample Midpoint (m) : 324.76
Core: 15 Top of Core Depth (m) : 320.00
Sect: 4 Top of Section Depth(m): 324.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (3-9), 1B (9-13), 1C (14-26);
Texture : PLAG-OL MODERATELY PHYRIC;
Structure : VEINS AND VEINLETS WITH CALCITE AND SMEC AND PYRITE;
Alteration : EXTENSIVELY;
Phenocrysts: PLAGIOCLASE ( 3%)
Size(mm): TO 0.7
OLIVINE
MICROPHENOS COMPLETELY ALTERED;
Leg : 52 Top/Bottom Interval(mm): 270/ 430 Analyst:
Hole: 418A Sample Midpoint (m) : 324.93
Core: 15 Top of Core Depth (m) : 320.00
Sect: 4 Top of Section Depth(m): 324.77
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCE 2A (27-30), 2B (31-33), 2C (34-39), 2D (40-43);
Texture : PLAG SPARSELY PHYRIC;
Structure : CALCITE-PYRITE VEINLETS;
Alteration : EXTENSIVELY;
Comments : BRECCIA OF CARBONATE AND SMEC IN PCE 2D,
POSSIBLY SOME SEDIMENTARY;
Groundmass : UNKNOWN LIGHT BLUE MINERALS;
Leg : 52 Top/Bottom Interval(mm): 460/ 590 Analyst:
Hole: 418A Sample Midpoint (m) : 325.09
Core: 15 Top of Core Depth (m) : 320.00
Sect: 4 Top of Section Depth(m): 324.96
LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;
Piece No. : PCE 3 (46-59);
Texture : PLAG SPARSELY PHYRIC, TWO PILLOW MARGINS WITH
ALTERED GLASS;
Structure : SMEC AND CALCITE VEINLETS;
Alteration : EXTENSIVELY;
Comments : BRECCIA IN BETWEEN PILLOW MARGINS WITH CARBONATE
AND SMEC;
Vesicles :
Location: Filling: CARB
Leg : 52 Top/Bottom Interval(mm): 620/ 960 Analyst:
Hole: 418A Sample Midpoint (m) : 325.46
Core: 15 Top of Core Depth (m) : 320.00
Sect: 4 Top of Section Depth(m): 325.12
LITHOLOGY: PLAG MODERATELY PHYRIC BASALT;
Piece No. : PCE 4A (62-71), 4B (71-82), 5 (84-96);
Texture : PLAG MODERATELY PHYRIC;
Structure : VEINLETS WITH SOME SMEC AND CARBONATE AND
PYRITE;
Alteration : EXTENSIVELY;
Vesicles :
Location: Filling: CARB,SMEC
Groundmass : BLUEISH MINERALS OBSERVED;
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): TO 0.7
IN CLOTS AND LATHS;
OLIVINE
VERY FEW PHENOS;
PYROXENE ( 0%)
Leg : 52 Top/Bottom Interval(mm): 30/ 80 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 329.58
Core: 16 Top of Core Depth (m) : 329.50
Sect: 1 Top of Section Depth(m): 329.53
LITHOLOGY: BASALTIC PILLOW BRECCIA;
Piece No. : PCE 1A (3-6), 1B (7-8);
Texture : PRIMARY QUENCH TEXTURE PRESERVED IN SOME CLASTS;
Alteration : EXTENSIVELY;
Groundmass : CALCITE AND SMEC AND IRON OXIDE MAIN MINS;
Leg : 52 Top/Bottom Interval(mm): 120/1250 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 330.75
Core: 16 Top of Core Depth (m) : 329.50
Sect: 1 Top of Section Depth(m): 329.62
LITHOLOGY: PLAG MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 2A (12-48), 2B (49-59), 2C (60-79), 2D (80-90),
2E (90-116), 2F (117-126);
Texture : PLAG MODERATELY PHYRIC, FINE-GRAINED TO MEDIUM-
GRAINED (20CM), GNDMASS HOLOCRYSTALLINE;
Structure : VEINS WITH CALCITE AND SMEC;
Alteration : EXTENSIVELY
OXIDATION HALOES AROUND VEINS IN PCES 2C-F;
Comments : SINGLE COOLING UNIT;
Vesicles : Size(mm): Percent: 1-2
Location: Filling: CALCITE
Size(mm): TO 1 Percent: 2-4
INCREASING VESICULARITY AFTER 40CM, SCATTERED
VESICLES THROUGHOUT SECTION BUT RARE BELOW 60CM;
Groundmass : PLAGIOCLASE
ELONGATE;
PYRITE SCATTERED THROUGHOUT;
Phenocrysts: PLAGIOCLASE ( <5%)
Size(mm): TO 2
OLIVINE ( <1%)
ALTERED;
Leg : 52 Top/Bottom Interval(mm): 0/1050 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 332.05
Core: 16 Top of Core Depth (m) : 329.50
Sect: 2 Top of Section Depth(m): 331.00
LITHOLOGY: PLAG MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (2-34), 1B (34-55), 1C (56-92), 1D (92-105);
Texture : PLAG MODERATELY PHYRIC, GNDMASS INTERGRANULAR TO
QUENCH;
Structure : VEINS WITH ABUNDANT CALCITE AND SMEC AND PYRITE;
Alteration : EXTENSIVELY
OXIDATION ALONG VEIN BORDERS UP TO O.5CM THICK,
DARK GREEN SMEC UP TO 1CM FROM VEIN;
Comments : PCE 1 CONTINUOUS WITH LOWER PART OF CORE 16-1;
Vesicles : Size(mm): 1 Percent: 5-10
Location: Filling: CALCITE,SMEC
Shape : ROUND
Groundmass : PLAGIOCLASE
PYROXENE
OPAQUE MINERALS
PYRITE
SMECTITE
MOTTLED BETWEEN 40 AND 80CM;
Phenocrysts: PLAGIOCLASE
Size(mm): 1-8
MOSTLY ANHEDRAL, COLORED LIGHT BLUE IN SECTION
DUE TO ALTERATION, CORES UNALTERED;
PYROXENE ( <1%)
OLIVINE ( <1%)
Replacement: SMECTITE
Minerals Replaced: GLASS
Leg : 52 Top/Bottom Interval(mm): 1080/1120 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 332.12
Core: 16 Top of Core Depth (m) : 329.50
Sect: 2 Top of Section Depth(m): 332.08
LITHOLOGY: BASALTIC BRECCIA;
Piece No. : PCE 2 (108-112);
Alteration : EXTENSIVELY;
Comments : PIECES OF GLASS AND OF YELLOW GREEN ALTERATION
MADE OF SMALL PIECES OF GLASS IN SPARRITIC CALCITE
MATRIX, SILTY BRECCIA INVADED BY CALCITE LATER ON;
Leg : 52 Top/Bottom Interval(mm): 0/1030 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 333.53
Core: 16 Top of Core Depth (m) : 329.50
Sect: 3 Top of Section Depth(m): 332.50
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (3-26), 1B (27-41), 1C (42-55), 1D (56-70),
1E (70-83), 1F (84-103);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, FINE TO MEDIUM
GRAINED;
Structure : VEINS FILLED WITH CALCITE AND SMEC AND PYRITE;
Alteration : EXTENSIVELY
VEINS BELOW 45CM HAVE OXIDIZED HALOES;
Comments : SINGLE COOLING UNIT;
Vesicles : Size(mm): TO 1 Percent: 3-4
FORM IN CLUSTERS WHERE THEY TAKE UP 10-20% OF
2-4CM DIAMETER AREAS;
Phenocrysts: PLAGIOCLASE ( <5%)
IN GLOMEROCRYSTS;
CLINOPYROXENE ( <1%)
Size(mm): <1
FRESH;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
Leg : 52 Top/Bottom Interval(mm): 0/ 540 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 333.04
Core: 17 Top of Core Depth (m) : 332.50
Sect: 1 Top of Section Depth(m): 332.50
LITHOLOGY: PLAG-PYX-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (4-11), 1B (11-28), 2A (31-45), 2B (46-54);
Texture : PLAG-PYX-OL MODERATELY PHYRIC, FINE TO VERY FINE
GRAINED, GLASSY LOCALLY;
Structure : VEINS WITH SMEC AND CALCITE;
Alteration : EXTENSIVELY
OXIDATION ON VEINS;
Vesicles : Size(mm): 0.5-1.5 Percent: 3-5
Location: Filling: CALCITE,SMEC
Phenocrysts: COMBINATION ( 5%)
Size(mm): 5-8
PLAGIOCLASE+PYROXENE (, COM%)
Size(mm): POSITE PHE
OLIVINE ( <1%)
RARE;
Leg : 52 Top/Bottom Interval(mm): 560/1440 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 333.94
Core: 17 Top of Core Depth (m) : 332.50
Sect: 1 Top of Section Depth(m): 333.06
LITHOLOGY: PLAG-PYX MODERATELY PHYRIC BASALT;
Piece No. : PCE 3A (56-102), 3B (102-144);
Texture : PLAG-PYX MODERATELY PHYRIC, FINE-GRAINED UPPER 10CM,
GNDMASS FINE TO MEDIUM-GRAINED;
Structure : VEINS WITH CALCITE AND SMECTITES;
Alteration : EXTENSIVELY;
Comments : BREAK BETWEEN PCES 2A AND 3, NEW FLOW IN PCE 3;
Vesicles : Size(mm): O.5 Percent: <1
Location: Filling: CALCITE,SMEC
Shape : ROUND
Groundmass : PLAGIOCLASE
PYROXENE
PYRITE
Phenocrysts: PLAGIOCLASE ( <5%)
Size(mm): 0.5
PYROXENE ( <1%)
IN UPPER PART;
Leg : 52 Top/Bottom Interval(mm): 0/1370 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 335.37
Core: 17 Top of Core Depth (m) : 332.50
Sect: 2 Top of Section Depth(m): 334.00
LITHOLOGY: PLAG-PYX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-42), 1B (42-53), 1C (53-72), 1D (72-90),
1F (90-110), 1G (110-118), 2A (122-131),
2B (131-137);
Texture : PLAG-PYX MODERATELY PHYRIC;
Structure : VEINS OF CALCITE AND SMEC THROUGHOUT, GREEN
SMEC VEINS ARE BROKEN AND CEMENTED WITH CALCITE,
CALCITE VEINS WITH GREEN SMEC CONVERTED TO BROWN
SMEC;
Alteration : EXTENSIVELY
GNDMASS MODERATELY ALTERED;
Vesicles : Size(mm): Percent: 2-3
Location: Filling: CALCITE,SMEC
Shape : ROUND
SMEC IS GREEN;
Groundmass : PLAGIOCLASE
FRESH MICROLITES;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): 3-4
RATHER FRESH BUT LOCALLY ALTERED FROM THE MARGINS;
PYROXENE ( <1%)
Size(mm): <1
Leg : 52 Top/Bottom Interval(mm): 0/1490 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 336.99
Core: 17 Top of Core Depth (m) : 332.50
Sect: 3 Top of Section Depth(m): 335.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (2-22), 1B (22-44), 1C (45-51), 1D (52-59),
1E (60-82), 1F (82-90), 1F1 (90-94), 1G (95-106),
1H (107-120), 1I (121-144), 1I1 (137-149);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS COARSENS TO
BOTTOM;
Structure : VEINS UP TO 2CM WIDE FILLED WITH CARBONATE + SMEC +
PYRITE (3,30,45,50,60,85,95,115,120CM);
Alteration : FRESH;
Vesicles : Size(mm): <1 Percent: 2
Location: Filling: SMEC
OR CARBONATE FILLING;
Groundmass : PLAGIOCLASE
DOMINATED BY NEEDLES QUITE FINE;
PYRITE
SINGLE GRAINS;
CLINOPYROXENE
TOWARDS BOTTOM AS DISCRETE EUHEDRAL GRAINS;
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): TO 3
SOMETIMES IN GLOMEROCRYSTS WITH OTHER PLAG;
ALTERED TO BLUE-GREEN SMEC ON SURFACES AND MAY
LOOK LIKE CPX IN CLOTS;
OLIVINE ( <1%)
Size(mm): <1
MICROPHENOS SERIATE WITH GNDMASS, PSEUDOMORPHED BY
SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,PLAG
Leg : 52 Top/Bottom Interval(mm): 0/1480 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 338.48
Core: 17 Top of Core Depth (m) : 332.50
Sect: 4 Top of Section Depth(m): 337.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (2-6), 1B (7-15), 1C (16-27), 2A (29-32),
2B (32-37), 3A (41-61), 3B (62-75), 3C (76-98),
4A (102-113), 4B (113-135), 4C (137-148);
Texture : PLAG-OL MODERATELY PHYRIC, FINE GNDMASS;
Structure : COMPLEX VEINS OF CARBONATE + SMEC + PYRITE (5,15,85,
90CM), SMEC OXIDIZED SEVERAL VARIETIES, QUARTZ IN
VEINS (60,90CM);
Alteration : FRESH;
Comments : SINGLE COOLING UNIT;
Vesicles : Size(mm): 1 Percent: 2
Location: Filling: CARBONATE
SOME FILLED WITH SMEC;
Groundmass : PLAGIOCLASE
NEEDLES IN UNEVEN DISTRIBUTION WHICH GIVES A
MOTTLED APPEARANCE;
PYRITE
DISSEMINATED GRAINS;
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): TO 3
GLOMEROCRYSTS LOOK LIKE PLAG-CPX CLOTS BUT IS
PROBABLY ALTERATION OF CLEAVAGE SURFACES;
OLIVINE ( <1%)
Size(mm): TO 1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,PLAG
Leg : 52 Top/Bottom Interval(mm): 0/ 100 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 339.10
Core: 18 Top of Core Depth (m) : 339.00
Sect: 1 Top of Section Depth(m): 339.00
LITHOLOGY: PYRITE NODULE;
Piece No. : PCE 1 (3-10);
Comments : 518 GRAMS, MINOR SMEC ON SURFACE;
Leg : 52 Top/Bottom Interval(mm): 140/1470 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 340.47
Core: 18 Top of Core Depth (m) : 339.00
Sect: 1 Top of Section Depth(m): 339.14
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 2A (14-20), 2B (21-30), 2C (30-42), 2D (43-54),
2E (55-73), 2F (73-86), 2G (87-104), 3A (107-121),
3B (122-132), 4 (135-147);
Texture : PLAG-OL HIGHLY PHYRIC, FINE-GRAINED GNDMASS;
Structure : COMPLEX CARBONATE + SMEC VEIN AT 55CM;
Alteration : FRESH;
Vesicles : Size(mm): Percent: 2-3
Location: Filling: SMEC
FILLED WITH CARBONATE AT TOP OF SECTION;
Groundmass : PLAGIOCLASE
NEEDLES, UNEVEN DISTRIBUTION CAUSES MOTTLED
APPEARANCE;
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): TO 3
GLOMEROCRYSTS, BLACK TO GREEN-BLUE ALTERATION
ON CLEAVAGE SURFACES APPEARS LIKE CPX;
Replacement: SMECTITE
Minerals Replaced: OL,PLAG
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 341.97
Core: 18 Top of Core Depth (m) : 339.00
Sect: 2 Top of Section Depth(m): 340.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (1-7), 1B (8-20), 2A (24-39), 2B (40-57),
3A (61-73), 3B (72-92), 3C (92-104), 4 (106-115),
5 (118-147);
Texture : PLAG-OL MODERATELY PHYRIC;
Structure : VEINS OF LIGHT BLUE SMEC WITH WHITE MARGINS OF
MONT, IN PCE 1B 8MM THICK VEIN OF MONT WITH ROUND
INCLUSIONS OF CALCITE AND DARK MARGINS;
Alteration : EXTENSIVELY;
GNDMASS MODERATELY ALTERED;
Vesicles : Size(mm): TO 2 Percent: 4
Location: Filling: SMEC,CALCITE
LIGHT GREEN SMEC AND CALCITE MORE SELDOM;
Groundmass : PLAGIOCLASE
FRESH MICROLITES;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): 3-4
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: PLAG,OL
MONTMORILLONITE
Leg : 52 Top/Bottom Interval(mm): 0/1310 Analyst:
Hole: 418A Sample Midpoint (m) : 343.31
Core: 18 Top of Core Depth (m) : 339.00
Sect: 3 Top of Section Depth(m): 342.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (2-29), 1A1 (28-31), 1B (33-39), 1C (40-51),
2A (54-61), 2A1 (62-72), 2B (73-131);
Texture : PLAG-OL MODERATELY PHYRIC, FINE-GRAINED GNDMASS;
Structure : SCATTERED VEINS OR VEINLETS FILLED WITH CARBONATE +
SMEC + MINOR PYRITE;
Alteration : FRESH;
Vesicles : Size(mm): Percent: 2-3
Location: Filling: SMEC,CARB
Size(mm): Percent: <4
Location: Filling: SMEC,CARB
PCES 1A-C;
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): <0.6
FRESH;
OLIVINE ( <1%)
Size(mm): <1
MICROPHENOS ALTERED TO SMEC;
Replacement: SMECTITE
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1460 Analyst:
Hole: 418A Sample Midpoint (m) : 344.96
Core: 18 Top of Core Depth (m) : 339.00
Sect: 4 Top of Section Depth(m): 343.50
LITHOLOGY: PLAG MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (2-46), 1B (47-57), 1C (58-79), 2 (93-96),
3A (100-107), 3B (105-115), 3C (116-146);
Texture : PLAG MODERATELY PHYRIC, GNDMASS FINE-GRAINED;
Structure : VEINS COMMON IN LOWER PART OF SECTION FILLED WITH
SMEC + CARBONATE + MINOR PYRITE;
Alteration : FRESH
PCES 1A-B;
MODERATELY
PCE 1C INCREASING ALTERATION DOWNWARD;
Vesicles : Size(mm): <1 Percent: 2-3
Location: Filling: SMEC,CARB
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): TO 0.7
OLIVINE ( 0%)
Replacement: SMECTITE
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/ 900 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 345.90
Core: 18 Top of Core Depth (m) : 339.00
Sect: 5 Top of Section Depth(m): 345.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1 (2-23), 2A (27-28), 2B (29-31), 2C (33-36),
2D (37-46), 2E (47-49), 2F (50-53), 3A (57-63),
3B (64-72), 3C (72-90);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS FINE-GRAINED;
Alteration : EXTENSIVELY;
COMPLEX REPLACEMENT CREATING HIGHLY ALTERED VUGGY
AREAS, GNDMASS HIGHLY ALTERED;
Vesicles : Size(mm): 1 Percent:
Location: Filling: SMEC,CARB,ZEOLITE
IN PCE 4, ALSO MINOR PYRITE AND OXIDATION, NOT
ABLE TO ESTIMATE PERCENTAGE OF VESICLES IN PCES
1-3 DUE TO COMPLEX ALTERATION, LARGE VUGS UP TO
10MM IN DIAMETER (SOME HOLLOW);
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): <3
MOST FRESH;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
ZEOLITE
Leg : 52 Top/Bottom Interval(mm): 940/1440 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 346.44
Core: 18 Top of Core Depth (m) : 339.00
Sect: 5 Top of Section Depth(m): 345.94
LITHOLOGY: APHYRIC TO PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 4A (94-103), 4B (103-144);
Texture : PCE 4A (95-100) IS APHYRIC BUT GRADES INTO MORE
PHYRIC TO LOWER PART OF SECTION, LITHOLOGY SIMILAR
TO UNALTERED MATERIAL IN PCES 1-3;
Alteration : MODERATELY;
Comments : RELATIONSHIP SIMILAR TO SEGREGATION VEINS AT SITE
417D;
Phenocrysts: PLAGIOCLASE
MICROPHENOS ALIGNED PARALLEL TO ORIENTATION OF
VEIN AT 96CM;
Leg : 52 Top/Bottom Interval(mm): 0/1230 Analyst:
Hole: 418A Sample Midpoint (m) : 347.73
Core: 18 Top of Core Depth (m) : 339.00
Sect: 6 Top of Section Depth(m): 346.50
LITHOLOGY: PLAG MODERATELY PHYRIC BASALT;
Piece No. : PCE 1 (2-20), 2A (22-44), 2B (45-58), 2C (60-74),
3A (77-82), 3B (82-94), 3C (95-101), 3D (102-111),
3E (112-123);
Texture : PLAG MODERATELY PHYRIC, GNDMASS FINE-GRAINED;
Structure : VEINS AND VEINLETS SCATTERED THROUGHOUT FILLED WITH
CARB+SMEC+PYRITE, BROWN STAINING ALONG VEINS;
Alteration : MOD;
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC,CARB,PYRITE
MINOR PYRITE;
Phenocrysts: PLAGIOCLASE ( 4-7%)
Size(mm): <3
UNEVEN DISTRIBUTION, FRESH, CLOTS UP TO 5MM, SEE
THIN SECTION DESCRIPTION FOR PCE 3E;
Replacement: SMECTITE
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1490 Analyst:
Hole: 418A Sample Midpoint (m) : 349.49
Core: 19 Top of Core Depth (m) : 348.00
Sect: 1 Top of Section Depth(m): 348.00
LITHOLOGY: PLAG MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (2-14), 1B (12-35), 1C (35-48), 1D (50-60),
1E (61-80), 1F (80-92), 1G (93-108), 1H (110-125),
2A (127-142), 2B (143-149);
Texture : PLAG MODERATELY PHYRIC, FINE-GRAINED GNDMASS;
Structure : VEINS COMMON WITH CARB+SMEC FILLING, SOME PYRITE
MINERALIZATION ALONG VEINS, IN PCE 1A VEINS WITH
SMEC+CARB+ZEOLITE AND ZEOLITE PATCHES, 1-2CM VEIN
ON TOP OF PCE 2A CONSISTING OF CARB+SMEC+ZEOLITE
NEEDLES WITH BROWN STAINING AND MINOR SILICA;
Alteration : EXTENSIVELY
PCES 1A+ 1C-D + 1G-2B;
FRESH
REST OF SECTION;
Vesicles : Size(mm): Percent: <1
RARE SMEC AND CARB FILLING;
Groundmass : PATCHY APPEARANCE;
Phenocrysts: PLAGIOCLASE ( 5-8%)
Size(mm): <3
FRESH;
Replacement: SMECTITE
CARBONATE
ZEOLITE
Leg : 52 Top/Bottom Interval(mm): 0/1390 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 350.89
Core: 19 Top of Core Depth (m) : 348.00
Sect: 2 Top of Section Depth(m): 349.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (3-11), 1B (12-24), 1C (25-46), 1D (47-71),
1E (72-81), 1F (82-95), 1G (91-110), 2A (114-124),
2B (125-139);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS FINE-MEDIUM
GRAINED, INTERGRANULAR;
Structure : NARROW VEINLETS CUT ENTIRE SECTION FILLED WITH
SMEC + CALCITE;
Alteration : MOD;
Comments : ENTIRE SECTION PART OF SINGLE COOLING UNIT, PCE 1A
FITS ON BASE OF 19-1, PCE 2B FITS ON TOP OF 19-3;
Vesicles : Size(mm): Percent: 0
Groundmass : PLAGIOCLASE
ELONGATE;
PYRITE
DISSEMINATED THROUGHOUT;
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): <3
AS SINGLE XTLS OR GLOMEROCRYSTS;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1390 Analyst:
Hole: 418A Sample Midpoint (m) : 352.39
Core: 19 Top of Core Depth (m) : 348.00
Sect: 3 Top of Section Depth(m): 351.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (2-35), 1B (36-47), 1C (48-55), 1D (56-68),
1E (69-77), 1F (77-86), 1G (87-94), 1H (95-106),
1I (107-119), 1J (120-127), 1K (127-130),
1L (131-140);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS FINE-MEDIUM
GRAINED;
Structure : VEINS CUT ENTIRE SECTION FILLED WITH SMEC + CARB +
MINOR PYRITE, IN PCE 1A SOME ZEOLITE;
Alteration : MODERATELY
PCES 1A-C + 1F-G +1I+1L;
FRESH
REST OF SECTION;
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC,CARB
Groundmass : PYRITE
DISSEMINATED, GNDMASS HAS PATCHY APPEARANCE;
Phenocrysts: PLAGIOCLASE ( 5-8%)
Size(mm): TO 0.8
FRESH;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
ZEOLITE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1410 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 353.91
Core: 19 Top of Core Depth (m) : 348.00
Sect: 4 Top of Section Depth(m): 352.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-16), 1B (17-18), 1C (17-28), 1D (27-30),
1E (30-37), 1F (37-46), 1G (47-54), 1H (54-63),
1I (64-85), 1J (85-102), 1K (102-122), 1L (120-128),
1M (129-141);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS FINE-MEDIUM
GRAINED;
Structure : SPARSE VEINS FILLED WITH CALCITE+SMEC;
Alteration : FRESH
ONLY OL ALTERED;
Vesicles : Size(mm): Percent: <1
Location: Filling: CALCITE
Groundmass : PLAGIOCLASE ( 20%)
Size(mm): 1-2
LATHS;
OLIVINE
Size(mm): 0.1-0.2
XTLS;
Phenocrysts: PLAGIOCLASE ( 7-10%)
Size(mm): 2-5
EUHEDRAL, FRESH;
OLIVINE ( <1%)
Size(mm): TO 2
ALTERED TO DARK GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 52 Top/Bottom Interval(mm): 0/1480 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 355.48
Core: 19 Top of Core Depth (m) : 348.00
Sect: 5 Top of Section Depth(m): 354.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (3-8), 1B (7-20), 1C (20-29), 1D (30-39),
1E (40-47), 1F (47-56), 1G (57-75), 1H (76-87),
1I (88-106), 1J (106-117), 1K (117-128),
1K1 (129-140), 1L (140-148);
Texture : PLAG-OL-MODERATELY PHYRIC, GNDMASS FINE-MEDIUM
GRAINED, INTERGRANULAR;
Structure : VEINS SCATTERED WITH CALCITE+SMEC+MINOR PYRITE;
Alteration : MOD
GRADES TO EXTENSIVELY NEAR PCE 1I;
FRESH
PCE 1J-1K1;
Comments : ENTIRE SECTION IS CONTINUOUS AND ONE COOLING UNIT,
CONNECTS WITH CORES 19-4 AND 19-6;
Vesicles : Size(mm): Percent: 0
Groundmass : PLAGIOCLASE
MICROLITES;
CLINOPYROXENE
BETWEEN PLAG MICROLITES;
Phenocrysts: PLAGIOCLASE ( 7-10%)
Size(mm): <3
FRESH;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 52 Top/Bottom Interval(mm): 0/1450 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 356.95
Core: 19 Top of Core Depth (m) : 348.00
Sect: 6 Top of Section Depth(m): 355.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (2-22), 2 (24-33), 3A (35-48), 3B (49-56),
3C (56-70), 3D (70-90), 3E (90-100), 3F (100-115),
3G (115-122), 3H (122-133), 3I (133-145);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS FINE-MEDIUM
GRAINED;
Structure : SCATTERED VEINLETS FILLED WITH SMEC+CALCITE+MINOR
PYRITE;
Alteration : FRESH;
Vesicles :
Location: Filling: SMEC
PALE BLUE-GREEN CLAY;
Groundmass : PLAGIOCLASE
Size(mm): TO 2
LATHS;
GLASS
ALTERED, MOTTLED APPEARANCE DUE TO LOCAL
CONCENTRATION OF PHENOS;
Phenocrysts: PLAGIOCLASE ( 7-10%)
Size(mm): <3
FRESH;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1230 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 358.23
Core: 19 Top of Core Depth (m) : 348.00
Sect: 7 Top of Section Depth(m): 357.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-12), 1B (12-28), 1C (29-46), 1D (47-55),
2 (57-60), 3A (63-68), 3A1 (68-74), 3B (75-84),
3C (85-100), 3D (100-115), 3D1 (115-120),
3E (121-123);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS FINE-COARSE
GRAINED, STARTING AT 50CM GRAIN SIZE INCREASES TO
COARSE BY ABOUT 85CM, HOLOCRYSTALLINE
INTERGRANULAR, HOLOCRYSTALLINE, PLAG-OL MODERATELY
PHYRIC, GNDMASS COARSENS GRADUALLY DOWNWARD BY 85CM,
FINE-GRAINED IN UPPER PART, TOP CONTINUOUS WITH
CORE 19-6;
Structure : VEINLETS FILLED WITH SMEC+CARB+MINOR PYRITE;
Alteration : MOD
2-84;
EXTENSIVELY
85-123, BELOW 85CM LARGE AREAS ALTERED TO SMEC+
CALCITE;
Comments : NO RECOVERED COOLING BREAKS;
Groundmass : PYRITE
DISSEMINATED;
Phenocrysts: PLAGIOCLASE ( 5-8%)
Size(mm): 3
FRESH;
OLIVINE ( <1%)
Size(mm): 1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
PYRITE
CALCITE
Leg : 52 Top/Bottom Interval(mm): 0/1430 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 358.43
Core: 20 Top of Core Depth (m) : 357.00
Sect: 1 Top of Section Depth(m): 357.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (3-39), 1B (40-56), 1C (57-72), 1D (72-85),
1D1 (82-86), 1E (87-93), 1F (93-109), 1G (110-135),
1H (136-143);
Texture : PLAG-OL MODERATELY PHYRIC, MEDIUM TO COARSE-GRAINED,
SAME LITHOLOGY AS CORE 19-7 BUT COARSER AND MORE
DIFFICULT TO ESTIMATE PHENOS, GNDMASS
HOLOCRYSTALLINE;
Structure : VEINS ARE SMEC LINED AND CALCITE FILLED;
Alteration : SLIGHTLY;
Vesicles : Size(mm): Percent: 0
Groundmass : PLAGIOCLASE
ELONGATE MICROLITES OR MICROPHENOS;
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): <3
FRESH;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
PYRITE
CALCITE
Leg : 52 Top/Bottom Interval(mm): 0/1240 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 359.74
Core: 20 Top of Core Depth (m) : 357.00
Sect: 2 Top of Section Depth(m): 358.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
Piece No. : PCE 1A (2-18), 1B (18-40), 1C (40-72), 1D (72-106),
1E (102-109), 1F (109-124);
Texture : PLAG-OL PHYRIC, GNDMASS FINE-GRAINED;
Structure : FEW VEINS FILLED WITH CARB, ZONE OF ALTERATION
2CM THICK ALONG VEIN IN PCE 1;
Alteration : MOD;
Vesicles : Size(mm): Percent: <1
Location: Filling: CALCITE
Groundmass : PLAGIOCLASE
FINE-GRAINED LATHS;
PYROXENE
REPLACING GLASS OR OL;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <10
ZONED, EUHEDRAL, FRESH;
OLIVINE ( <1%)
Size(mm): 0.5-2
ALTERED TO BLUE SMEC;
Replacement: SMECTITE
Minerals Replaced: GLASS OR OL
Leg : 52 Top/Bottom Interval(mm): 0/1380 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 361.38
Core: 20 Top of Core Depth (m) : 357.00
Sect: 3 Top of Section Depth(m): 360.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (2-30), 1B (31-40), 1C (41-54), 1D (54-60),
2 (63-65), 3A (68-99), 3B (100-109), 3C (109-138);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS INTERGRANULAR
AND HOLOCRYSTALLINE, MEDIUM TO COARSE-GRAINED;
Structure : SINGLE COOLING UNIT, SPARSE VEINS FILLED WITH
CARB+SMEC;
Alteration : SLIGHTLY;
Comments : SECTION FITS WITH NO GAP BETWEEN SECTIONS 2 AND 4;
Vesicles : Size(mm): Percent: 0
Groundmass : MINOR SMEC+PYRITE IN GNDMASS;
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): <4
FRESH;
OLIVINE ( <1%)
Size(mm): <1.5
ALTERED TO SMEC, IRREGULAR IN DISTRIBUTION;
Replacement: SMECTITE
Minerals Replaced: OL
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1380 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 362.88
Core: 20 Top of Core Depth (m) : 357.00
Sect: 4 Top of Section Depth(m): 361.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-33), 1B (33-78), 1C (77-94), 1D (94-109),
1E (107-115), 1F (115-138);
Texture : PLAG-OL MODERATELY PHYRIC, INTERSERTAL,
HOLOCRYSTALLINE, GNDMASS MEDIUM-GRAINED;
Structure : SPARSE VEINLETS FILLED WITH SMEC, PROMINENT VEINS
IN PCE 1 FILLED WITH SMEC+PYRITE;
Alteration : MODERATELY
MAJOR ALTERATION IN PCE 1A ALONG VEIN WITH GREEN
SMEC AND PYRITE AT OUTER LIMIT OF ALTERED ZONE;
Comments : BASE CONTINUOUS WITH UPPER PART OF CORE 20-5;
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC
Groundmass : PLAGIOCLASE
PYROXENE
CLAY
MINOR SMEC+CALCITE;
Phenocrysts: PLAGIOCLASE ( 7-10%)
Size(mm): <8
FRESH, ZONE EUHEDRAL;
OLIVINE ( 1%)
Size(mm): <5
ALTERED TO SMEC + CALCITE;
Replacement: SMECTITE
Minerals Replaced: OL
PALE BLUE OR DARK GREEN;
CALCITE
Minerals Replaced: OL
CLAY
Minerals Replaced: OL
Leg : 52 Top/Bottom Interval(mm): 0/ 810 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 363.81
Core: 20 Top of Core Depth (m) : 357.00
Sect: 5 Top of Section Depth(m): 363.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (2-5), 1B (5-19), 1C (15-21), 1D (22-29),
2A (32-57), 2B (57-65), 3 (75-81);
Texture : PLAG-OL MODERATELY PHYRIC, DECREASING IN GRAIN SIZE
TO GLASSY MARGIN IN PCE 3, FINE-GRAINED GNDMASS;
Structure : SINGLE THICK CARB+SMEC VEIN OCCURS AT 66CM;
Alteration : FRESH;
Vesicles : Size(mm): Percent: 1
Location: Filling: SMEC
Groundmass : CARB IN PCE 3;
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): <4
FRESH;
OLIVINE ( <1%)
Size(mm): <2
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 830/1430 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 364.43
Core: 20 Top of Core Depth (m) : 357.00
Sect: 5 Top of Section Depth(m): 363.83
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 4 (83-89), 5A (92-107), 5B (109-116);
5C (119-125), 5D (128-143);
Texture : PLAG-OL MODERATELY PHYRIC, TOP GLASSY RIND OF
LOWER FLOW OCCURS IN PCE 4;
Structure : SPARSE VEINLETS FILLED WITH SMEC + CARB COMMON IN
85-145CM AND CAUSE ROCK TO BREAK UP;
Alteration : FRESH;
Vesicles : Size(mm): Percent: <2
Location: Filling: CARB,SMEC,PYRITE
MINOR PYRITE;
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): <3
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 365.97
Core: 20 Top of Core Depth (m) : 357.00
Sect: 6 Top of Section Depth(m): 364.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (2-24), 1B (25-36), 1C (37-42), 1D (43-57),
1E (59-70), 2A (74-88), 2B (89-97), 2C (97-104),
3A (107-120), 3B (121-140), 3C (140-147);
Texture : PLAG-OL MODERATELY PHYRIC;
Structure : SINGLE COOLING UNIT, ABUNDANT VEINS FILLED WITH SMEC
+ CARB + PYRITE, PROMINENT VEIN IN PCE 1B ALSO HAS
QUARTZ;
Alteration : FRESH;
Vesicles : Size(mm): Percent: 1
Location: Filling: SMEC,CARB
CARB MINOR;
Groundmass : PLAGIOCLASE
NEEDLES IN UNEVEN DISTRIBUTION GIVES MOTTLED
APPEARANCE, DISSEMINATED PYRITE;
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): <3
FRESH;
OLIVINE ( <1%)
Size(mm): <2
ALTERED TO SMEC, MICROPHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1050 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 367.05
Core: 20 Top of Core Depth (m) : 357.00
Sect: 7 Top of Section Depth(m): 366.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (2-17), 1B (17-29), 1C (30-41), 1D (43-53),
2A (56-67), 2B (68-78), 2C (80-91), 3 (94-105);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS HOLOCRYSTALLINE
FINE TO MEDIUM-GRAINED;
Structure : VEINLETS <3MM WITH DARK GREEN SMEC MARGINS;
Alteration : FRESH;
Vesicles : Size(mm): Percent: 2
Location: <2 Filling: SMEC,CARB
SMEC LIGHT GREEN;
Groundmass : PLAGIOCLASE
FRESH MICROLITES;
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): <5
FRESH;
OLIVINE ( 1%)
Size(mm): <3
ALTERED TO LIGHT GREEN SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 52 Top/Bottom Interval(mm): 0/1210 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 367.21
Core: 21 Top of Core Depth (m) : 366.00
Sect: 1 Top of Section Depth(m): 366.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1 (3-7), 2 (13-19), 3 (24-27), 4 (32-35),
41 (35-41), 5 (47-59), 6A (63-71), 6B (71-76),
6C (77-84), 6C1 (84-85), 7A (97-101), 7B (102-111),
8 (117-121);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS HOLOCRYSTALLINE
FINE TO MEDIUM-GRAINED, PCE 6D COARSER THAN REST OF
SECTION BUT GRADES INTO FINER-GRAINED PORTIONS;
Structure : HEAVILY-VEINED ESPECIALLY PCES 5-8, VEINS FILLED
WITH CALCITE + SMEC + QUARTZ + ZEOLITE, NO COOLING
UNIT BREAKS;
Alteration : EXTENSIVELY
PCES (4-41, 5-6C1, 7A-8), REST FRESH;
Vesicles : Size(mm): Percent: 1-2
Location: 0.25-1 Filling: CALCITE,SMEC
Phenocrysts: PLAGIOCLASE ( 5-8%)
Size(mm): <3
FRESH;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
ZEOLITE
Leg : 52 Top/Bottom Interval(mm): 0/1500 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 368.50
Core: 22 Top of Core Depth (m) : 367.00
Sect: 1 Top of Section Depth(m): 367.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (2-8), 2A (12-15), 2B (15-25), 3 (27-30),
4 (33-42), 5 (45-54), 6 (55-58), 7A (60-66),
7B (66-74), 8 (75-77), 9A (79-83), 9B (82-86),
10A (88-96), 10B (96-106), 11A (107-118),
11B (119-133), 11C (133-140), 12 (142-150);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS HOLOCRYSTALLINE
FINE-GRAINED;
Structure : VEINS COMMON, THICK FILLED WITH CALCITE, THIN FILLED
WITH CALCITE+SMEC+PYRITE, CONTINUOUS WITH CORE 22-2;
Alteration : MOD;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: CALCITE,SMEC
Shape : ROUND
Groundmass : PLAGIOCLASE
LATHS, ALSO DISSEMINATED PYRITE;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <5
FRESH BUT STAINED GREEN NEAR FISSURES;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/ 580 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 369.08
Core: 22 Top of Core Depth (m) : 367.00
Sect: 2 Top of Section Depth(m): 368.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (2-8), 1B (9-16), 1C (17-21), 1D (22-29),
1E (30-36), 1F (37-46), 1G (47-58);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS HOLOCRYSTALLINE
FINE-GRAINED;
Structure : SPARSE VEINS FILLED WITH SMEC+CARB+MINOR PYRITE;
Alteration : FRESH
ALTERATION CONFINED TO VEINS OF SMEC+CARB+PYRITE;
Vesicles : Size(mm): <1 Percent: 1
Location: Filling: SMEC,CARB
Groundmass : PLAGIOCLASE
NEEDLES IN UNEVEN DISTRIBUTION GIVES MOTTLED
APPEARANCE;
OLIVINE
ALTERED;
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): <4
OFTEN IN GLOMEROCRYSTS, FRESH OR STAINED NEAR
CLEAVAGES;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC, MICROPHENOS;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/ 0 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 370.00
Core: 22 Top of Core Depth (m) : 367.00
Sect: 3 Top of Section Depth(m): 370.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE NO PCE NUMBERS ASSIGNED;
Texture : LITHOLOGY SIMILAR TO REST OF CORE 22;
Comments : NINE FRAGMENTS (TWO OF WHICH FIT TOGETHER AND ARE SO
MARKED) THAT STUCK IN THE DRILLING PIPE AFTER
PULLING CORE 22, CAME FROM INTERVAL BELOW CORE 22-2
AT 60CM AND ABOVE THE BIT;
Leg : 52 Top/Bottom Interval(mm): 0/ 300 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 375.80
Core: 23 Top of Core Depth (m) : 375.50
Sect: 1 Top of Section Depth(m): 375.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1 (2-18), 2 (22-30);
Texture : PLAG-OL MODERATELY PHYRIC, FINE-GRAINED TO GLASSY,
GLASS ZONE IN PCE 1 IS SURROUNDED BY A FINE-GRAINED
ZONE;
Structure : VEINS FILLED WITH SMEC+CALCITE;
Alteration : MOD;
Groundmass : PLAGIOCLASE
LATHS;
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): 1-5
PARTLY ALTERED AND STAINED GREEN;
OLIVINE ( 1%)
Size(mm): <3
ALTERED TO GREEN SMEC + CALCITE, MAY BE SOME PYX;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 52 Top/Bottom Interval(mm): 0/1380 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 377.38
Core: 24 Top of Core Depth (m) : 376.00
Sect: 1 Top of Section Depth(m): 376.00
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (3-27), 1B (28-46), 1C (45-55), 2A (57-70),
2B (71-78), 3A (82-86), 3B (88-138);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS FINE-GRAINED
TO GLASSY, GLASS FRESH ON TOP OF PCE 3A, PCES 2-3
FINER-GRAINED THAN ABOVE WITH GLASSY SELVAGES;
Structure : THICK COMPLEX VEIN OF CARB+SMEC OCCURS WITH MINOR
PYRITE;
Alteration : FRESH;
MODERATELY
FROM (5-11, 39-44, 82-87, 128-135);
Comments : PCE 3A SIMPLE PILLOW BRECCIA FROM COLLAPSE;
Vesicles : Size(mm): <0.5 Percent: <1
Location: Filling: SMEC,CARB
VUGGY PATCHES OF CARB IN PCES (1B,3B);
Groundmass : OLIVINE
PLAGIOCLASE
NEEDLES;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <3
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC, MICROPHENOS;
CLINOPYROXENE ( <1%)
Size(mm): <2
ROUND, REFRACTIVE INDEX 1.704, 85% DIOPSIDE, MAY
CONTAIN PLAG INCLUSIONS;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/ 880 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 378.38
Core: 24 Top of Core Depth (m) : 376.00
Sect: 2 Top of Section Depth(m): 377.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (4-20), 2 (26-28), 3A (32-44), 3B (44-55),
3C (55-65), 4 (72-76), 5 (80-88);
Texture : PLAG-OL-CPX PHYRIC, GLASSY MARGIN BETWEEN 3B-3C,
GNDMASS FINE-GRAINED TO GLASSY;
Structure : THICK VEINS IN PCE 1 AND 2A (TO 1CM) FILLED WITH
CHALCEDONY AND QUARTZ IN INTERIOR PARTS AND CALCITE
NEAR MARGINS, THIN BANDS OF SMEC ON OUTSIDE MARGINS,
GRAINS OF PYRITE OCCUR IN SMEC+CALCITE VEINS;
Alteration : FRESH
PCE 2;
MODERATELY
PCE 1 AND 3A-3B AND 4-5;
EXTENSIVELY
PCE 3C;
Comments : PCE 3C IS BRECCIATED, PCES 4-5 ARE PART OF THE CORE
CATCHER;
Vesicles : Size(mm): <2 Percent: 1
Location: Filling: CALCITE,SMEC
Groundmass : PARTLY REPLACED BY SMEC IN PCES 1-2A;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <4
FRESH;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC+CALCITE;
CLINOPYROXENE ( <1%)
Size(mm): <2
IN GLOMEROCRYSTS WITH PLAG;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Minerals Replaced: OL
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 382.97
Core: 25 Top of Core Depth (m) : 381.50
Sect: 1 Top of Section Depth(m): 381.50
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC TO APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1 (3-6), 2A (9-27), 2B (28-69), 2C (70-132),
2D (133-147);
Texture : PLAG-OL-CPX MODERATELY PHYRIC GRADING TO APHYRIC
IN ZONES 8-22CM AND 48-72CM, GNDMASS FINE-GRAINED TO
GLASSY, FINE-GRAINED MARGINS AT 30CM, FRESH GLASS AT
>5CM;
Structure : THICK COMPLEX VEINS (13,25,45,75,135CM) FILLED WITH
SMEC+CARB, SOME OXIDATION;
Alteration : MOD
FROM (10-13, 23-27, 43-47, 70-76, 129-136CM);
FRESH
REST OF SECTION;
Vesicles : Size(mm): <1 Percent: 0-2
Location: Filling: SMEC,CARB
UNEVENLY DISTRIBUTED, UP TO 1CM WIDE;
Groundmass : PLAGIOCLASE
IN APHYRIC ZONES NEDDLE-LIKE AND MORE GRANULAR;
OLIVINE ( 2-3%)
Phenocrysts: PLAGIOCLASE ( 0-10%)
Size(mm): <3
FRESH;
OLIVINE ( 0-1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 0-1%)
Size(mm): <2
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1480 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 384.48
Core: 25 Top of Core Depth (m) : 381.50
Sect: 2 Top of Section Depth(m): 383.00
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC TO APHYRIC BASALT;
PILLOW BASALT;
Piece No. : PCE 1A (2-18), 1B (18-37), 1C (38-50), 1D (47-55),
2 (57-82), 3 (86-92), 4 (95-101), 5A (104-115),
5B (115-121), 5C (122-148);
Texture : PLAG-OL-CPX MODERATELY PHYRIC TO APHYRIC IN PCES
3-4, GNDMASS FINE-GRAINED TO GLASSY, GLASSY MARGINS
BETWEEN 1A-B AND TOP OF PCE 2;
Structure : VEINS UP TO 1CM WIDE FILLED WITH CALCITE AND WHITE
MONT WITH GREEN SMEC MARGINS, BROWN SMEC IN CONTACT
WITH GREEN SMEC;
Alteration : MOD;
Vesicles : Size(mm): <1 Percent: 1-2
Location: Filling: CALCITE,SMEC
Groundmass : PLAGIOCLASE
FRESH MICROLITES;
Phenocrysts: PLAGIOCLASE ( 0-10%)
Size(mm): <3
FRESH;
OLIVINE ( 0-1%)
Size(mm): <2
ALTERED TO SMEC + CALCITE;
CLINOPYROXENE ( <1%)
Size(mm): <2
FRESH, ANHEDRAL, AUGITE OR DIOPSIDE;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
Leg : 52 Top/Bottom Interval(mm): 0/ 440 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 384.94
Core: 25 Top of Core Depth (m) : 381.50
Sect: 3 Top of Section Depth(m): 384.50
LITHOLOGY: PLAG MODERATELY PHYRIC TO APHYRIC BASALT;
Piece No. : PCE 1A (3-24), 1B (23-44);
Texture : PLAG MODERATELY PHYRIC TO APHYRIC IN PCE 1B,
GNDMASS FINE-GRAINED;
Structure : VEINS WITH CALCITE AND GREEN SMEC MARGINS AND SOME
FILLED WITH LIGHT GREEN SMEC WITH DARK
GREEN MARGINS;
Alteration : MOD;
Vesicles : Size(mm): Percent: 1-2
Location: Filling: SMEC,CALCITE
Groundmass : PLAGIOCLASE
MICROLITES, FRESH;
MINOR PYRITE;
Phenocrysts: PLAGIOCLASE ( 0-6%)
Size(mm): <4
FRESH;
Replacement: SMECTITE
CALCITE
Leg : 52 Top/Bottom Interval(mm): 0/1260 Analyst:
Hole: 418A Sample Midpoint (m) : 385.76
Core: 26 Top of Core Depth (m) : 384.50
Sect: 1 Top of Section Depth(m): 384.50
LITHOLOGY: PLAG-CPX-OL MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1A (2-20), 1B (20-30), 1C (30-52), 1D (52-61),
1E (62-78), 1F (78-80), 1G (81-92), 1G1 (92-94),
1H (95-111), 1I (110-126);
Texture : PLAG-CPX-OL MODERATELY PHYRIC, GNDMASS FINE-GRAINED,
MOTTLED DUE TO DISTRIBUTION OF VARYING GRAIN SIZES;
Structure : VEINS AND VEINLETS FILLED WITH SMEC+CARB, BROWN
STAINING ALONG CRACKS, SOME MINOR SILICA, SOME VEINS
OXIDIZED;
Alteration : MOD;
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC,CARB
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <5
FRESH;
CLINOPYROXENE ( 1%)
Size(mm): <2
FRESH;
OLIVINE ( <1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1110 Analyst:
Hole: 418A Sample Midpoint (m) : 387.11
Core: 26 Top of Core Depth (m) : 384.50
Sect: 2 Top of Section Depth(m): 386.00
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
MASSIVE;
Piece No. : PCE 1 (2-32), 11 (24-32), 2A (34-65), 2B (66-72),
2C (71-84), 2D (86-94), 2E (95-104), 2F (106-111);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS GRADES FROM
MEDIUM-GRAINED TO FINE-GRAINED NEAR 86CM;
Structure : VEINS COMMON BETWEEN 85 AND 110CM FILLED WITH
CARB+SMEC, PCES REPRESENT BASE OF FLOW UNIT;
Alteration : MOD;
Vesicles : Size(mm): Percent: <1
Location: Filling: CARB,SMEC
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): <5
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <2
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 1120/1430 Analyst:
Hole: 418A Sample Midpoint (m) : 387.43
Core: 26 Top of Core Depth (m) : 384.50
Sect: 2 Top of Section Depth(m): 387.12
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 2G (112-130), 2H (131-143);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS VERY FINE-
GRAINED;
Structure : VEINS AND VEINLETS FILLED WITH SMEC+CARB;
Alteration : EXTENSIVELY
BROWN STAINING ALONG OXIDIZED VEINS;
Comments : MINOR BRECCIA OCCURS AT TOP OF PILLOW
SEQUENCE IN PCE 2G;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <4
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <2
FRESH;
Replacement: CARBONATE
SMECTITE
Minerals Replaced: OL
Leg : 52 Top/Bottom Interval(mm): 0/1480 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 388.98
Core: 26 Top of Core Depth (m) : 384.50
Sect: 3 Top of Section Depth(m): 387.50
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-17), 1B (17-27), 1C (28-41), 2 (44-46),
3 (48-58), 31 (58-63), 4 (65-67), 5A1 (69-71),
5A (72-87), 5B (87-94), 5C (95-104), 5D (105-114),
6A (115-129), 6B (128-136), 7 (139-148);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS FINE-GRAINED
TO GLASSY;
Structure : VEINS COMMON THROUGHOUT FILLED WITH SMEC+CARB;
Alteration : MOD
GLASS SELVAGES MOSTLY ALTERED TO SMEC, SOME FRESH
GLASS PRESENT;
Vesicles : Size(mm): Percent: 0
Groundmass : PLAGIOCLASE
NEEDLE-LIKE MICROLITES OR MICROPHENOS, MINOR
PYRITE DISSEMINATED THROUGHOUT;
Phenocrysts: PLAGIOCLASE ( 8-10%)
Size(mm): <4
FRESH, OCCUR AS SINGLE XTLS OR GLOMEROCRYSTS;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC, IRREGULARLY DISTRIBUTED;
CLINOPYROXENE ( <1%)
Size(mm): <2
FRESH, ROUNDED;
Replacement: CARBONATE
SMECTITE
Minerals Replaced: OL,GLASS
Leg : 52 Top/Bottom Interval(mm): 0/1490 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 390.49
Core: 26 Top of Core Depth (m) : 384.50
Sect: 4 Top of Section Depth(m): 389.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-11), 1B (12-25), 1C (25-39), 1D (39-60),
2 (64-71), 3 (74-80), 4 (83-86), 5 (89-94),
6 (97-101), 71 (104-108), 7 (104-117), 8A (120-127)
8B (128-135), 8C (138-159);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS FINE-GRAINED TO
GLASSY, COARSER IN PCES 1B-C, FRESH GLASS PRESENT IN
CORE-CATCHER;
Structure : SCATTERED VEINS FILLED WITH CALCITE+SMEC+MINOR
PYRITE;
Alteration : MOD;
Comments : PILLOW MARGIN BRECCIA ASSOCIATED WITH GLASS (PCE 2);
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: CALCITE
MOSTLY NON-VESICULAR BUT VESICLES OCCUR IN BRECCIA
OF PCE 2 (<1MM) FILLED WITH CALCITE;
Groundmass : DISSEMINATED PYRITE IN GNDMASS;
Phenocrysts: PLAGIOCLASE ( 8-10%)
Size(mm): <5
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 52 Top/Bottom Interval(mm): /0150 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 393.65
Core: 27 Top of Core Depth (m) : 393.50
Sect: 1 Top of Section Depth(m): 393.50
LITHOLOGY: PLAG MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-9), 2 (11-14);
Texture : PLAG MODERATELY PHYRIC, GNDMASS FINE-GRAINED;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <5
FRESH;
Leg : 52 Top/Bottom Interval(mm): 170/ 570 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 394.07
Core: 27 Top of Core Depth (m) : 393.50
Sect: 1 Top of Section Depth(m): 393.67
LITHOLOGY: PLAG-OL SPARSELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 3 (17-28), 4A (31-47), 4B (44-51), 4C (52-57);
Texture : PLAG-OL SPARSELY PHYRIC, GNDMASS VERY FINE-GRAINED;
Structure : FLOW STRUCTURE AT BASE;
Alteration : MOD;
Groundmass : PLAGIOCLASE
LATHS;
OLIVINE
Phenocrysts: PLAGIOCLASE ( <2%)
Size(mm): 0.5-2
OLIVINE
Leg : 52 Top/Bottom Interval(mm): 590/ 950 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 394.45
Core: 27 Top of Core Depth (m) : 393.50
Sect: 1 Top of Section Depth(m): 394.09
LITHOLOGY: BASALTIC BRECCIA;
Piece No. : PCE 5 (59-64), 6 (66-72), 7 (73-82), 8 (83-90),
9 (92-95);
Texture : HYALOCLASTIC, BROKEN PCES OF GREEN GLASS UP TO 3CM,
ALTERED TO CLAY IN PCE 5, PCES 6-9 MIXTURE OF LAVA
AND HYALOCLASTIC BRECCIA, PCES 7-8 SHOW BROKEN
MINIFLOWS 3CM THICK WITH GLASSY MARGINS SURROUNDED
BY HYALOCLASTIC BRECCIA;
Alteration : MOD
GLASSY SELVAGES ARE ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: GLASS
Leg : 52 Top/Bottom Interval(mm): 970/1480 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 394.98
Core: 27 Top of Core Depth (m) : 393.50
Sect: 1 Top of Section Depth(m): 394.47
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 10 (97-110), 11A (111-122), 11B (122-127),
11C (128-136), 12 (139-148);
Texture : PLAG-OL PHYRIC, GNDMASS FINE-GRAINED TO GLASSY;
Structure : FRACTURE IN PCE 11A CONTEMPORANEOUS WITH COOLING,
GLASS ZONE AT END OF FRACTURE SUGGESTS QUENCHING,
FRACTURE CUTS THROUGH CRYSTALLIZED BORDER OF PILLOW
TO MOLTEN INTERIOR WHERE GLASSY MARGIN DEVELOPED;
FRACTURES FILLED WITH SMEC+CARB;
Alteration : MOD;
Phenocrysts: PLAGIOCLASE (12-17%)
Size(mm): 1-9
FRESH;
OLIVINE ( 0-3%)
Size(mm): 0.5-4
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1430 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 396.43
Core: 27 Top of Core Depth (m) : 393.50
Sect: 2 Top of Section Depth(m): 395.00
LITHOLOGY: PLAG-OL SPARSELY TO PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (4-10), 1B (14-17), 2 (21-31), 3 (34-47),
3A1 (48-50), 4 (52-56), 5A (60-82), 5B (82-90),
6 (93-111), 61 (110-122), 7 (125-130), 8 (132-143);
Texture : PLAG-OL SPARSELY PHYRIC IN PCES 7-8, PLAG-OL PHYRIC
IN PCES 5-6, GRADING IN REST OF SECTION;
Structure : VEINS AND VEINLETS FILLED WITH CARB+SMEC+MINOR
PYRITE, ESPECIALLY THICK VEINS AT BOTTOM OF PCE 3
AND IN CENTER OF PCE 5A;
Alteration : MOD
GLASS SELVAGES ALTERED TO SMEC;
Comments : PCE 1B IS ALTERED SIDEROMELANE BRECCIA, ONE PILLOW
FROM 60-122CM;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: CALCITE
Groundmass : FINE TO VERY FINE-GRAINED;
Phenocrysts: PLAGIOCLASE ( 2-14%)
Size(mm): <2
FRESH;
OLIVINE ( 0-1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 0%)
Replacement: CARBONATE
SMECTITE
Minerals Replaced: OL
Leg : 52 Top/Bottom Interval(mm): 0/ 580 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 397.08
Core: 27 Top of Core Depth (m) : 393.50
Sect: 3 Top of Section Depth(m): 396.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-7), 1B (7-14), 2 (17-24), 3 (27-31),
4 (34-43), 5CC (46-49), 6CC (53-58);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS FINE-GRAINED TO
GLASSY, PCE 1A IS SIDEROMELANE BRECCIA DERIVED FROM
PILLOW RINDS, PARTLY ALTERED GLASS FRAGMENTS IN
GREEN SMEC MATRIX;
Structure : VEINS FILLED WITH SMEC+CALCITE;
Alteration : MOD;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: CALCITE,SMEC
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <4
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 403.97
Core: 28 Top of Core Depth (m) : 402.50
Sect: 1 Top of Section Depth(m): 402.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT AND BASALTIC
BRECCIA;
PILLOW;
Piece No. : PCE 1 (2-4), 2A (7-20), 2B (21-32), 2C (33-38),
2D (40-52), 3 (57-61), 4 (64-69), 5 (72-74),
6A (79-85), 6B (85-101), 6C (102-116), 7 (120-125),
8A (129-140), 8B (141-147);
Texture : INTERMIXED PILLOW BRECCIA AND PLAG-OL MODERATELY
PHYRIC PILLOW BASALT, BRECCIAS OCCUR AT GLASSY
PILLOW MARGINS, MATRIX IS ALTERED GLASS, CLASTS ARE
ALTERED GLASS WITH PRESERVED VARIOLITES AND CRACKS,
BRECCIA FORMED DURING ERUPTION BECAUSE GLASSY
MARGIN CLASTS CONSUMED INTO INTERIOR OF PILLOWS,
CARB+PINK ZEOLITE REPLACE SOME MATRIX MATERIAL,
GNDMASS FINE-GRAINED TO GLASSY;
Structure : SCATTERED VEINS FILLED WITH SMEC+CARB;
Alteration : MOD
ALTERATION INTENSE IN BRECCIATED ZONE, SMEC
REPLACES ALL GLASS;
Vesicles : Size(mm): <0.5 Percent: <1
Location: Filling: SMEC,CARB
Groundmass : PLAGIOCLASE
NOT NEEDLE-LIKE;
OLIVINE
MINOR, ALTERED TO SMEC;
Phenocrysts: PLAGIOCLASE ( 5-10%)
Size(mm): <6
NORMALLY FRESH BUT STAINED GREEN OR YELLOW NEAR
ALTERED BRECCIA ZONES, LARGER ONES MAY BE ZONED
WITH GLASSY INTRUSIONS;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
ZEOLITE
Leg : 52 Top/Bottom Interval(mm): 0/1430 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 405.43
Core: 28 Top of Core Depth (m) : 402.50
Sect: 2 Top of Section Depth(m): 404.00
LITHOLOGY: PLAG-CPX-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-12), 1B (12-15), 1C (15-17), 2 (20-31),
3 (34-50), 4A (54-56), 4B (58-61), 4C (60-64),
4D (65-69), 5 (72-82), 6 (84-91), 7 (94-96),
8 (100-107), 9 (110-120), 10A (122-129),
10B (130-136), 11 (140-143);
Texture : PLAG-CPX-OL PHYRIC, PHENOS RANGE FROM 10-15% IN
PCES 1-8 TO 25% IN PCES 9-11, GNDMASS FINE-GRAINED
TO GLASSY, BRECCIA ZONES ARE ASSOCIATED WITH GLASS
SELVAGES, BRECCIA CEMENTED WITH SMEC + CARB;
Structure : VEINS IN PCES 3-5 WITH COARSE-GRAINED CARB AND
GREEN-DARK GREEN SMEC IN MARGINS;
Alteration : MOD
GLASS ALTERED TO SMEC, BADLY ALTERED SEDIMENT
INCLUSION IN PCE 4D NOW LIGHT GREEN SMEC+CALCITE
AGGREGATE;
Vesicles : Size(mm): <2 Percent: 1
Location: Filling: SMEC,CALCITE
Phenocrysts: PLAGIOCLASE (10-20%)
Size(mm): <7
FRESH;
OLIVINE ( 1-2%)
Size(mm): <2
ALTERED TO SMEC + FORSTERITE;
CLINOPYROXENE ( 1-3%)
Size(mm): <3
FRESH, MOSTLY IN GLOMEROCRYSTS WITH PLAG;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
ZEOLITE
PINK IN BRECCIA MATRIX;
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 406.97
Core: 28 Top of Core Depth (m) : 402.50
Sect: 3 Top of Section Depth(m): 405.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT AND BASALTIC BRECCIA;
PILLOW;
Piece No. : PCE 1A (2-9), 1B (8-17), 2 (20-24), 3A (27-42),
3B (42-48), 4 (51-55), 5A (58-67), 5B (68-74),
6 (76-85), 7 (87-93), 8 (96-108), 9 (112-116),
10A (120-127), 10B (126-140), 11 (144-147);
Texture : PLAG-OL-CPX PHYRIC RANGING FROM 10% PHENOS NEAR
CHILLED PILLOW MARGINS TO 20% IN PILLOW INTERIORS,
GLASSY BRECCIATED MARGINS IN PCE (1A,5,8-11),
GNDMASS FINE-GRAINED TO GLASSY, SLIGHTLY COARSER
GRAINED IN PILLOW INTERIORS;
Structure : VEINS ARE FILLED WITH SMEC+CALCITE;
Alteration : MOD
FROM 2-62CM AND 69-85CM;
EXTENSIVELY
62-70CM AND 85-147CM, INTERPILLOW BRECCIA CONSISTS
OF ALTERED GLASS FRAGMENTS IN A MATRIX OF DARK
GREEN SMEC CONTAINING MINOR CARB+PINK ZEOLITE,
PCES 1A AND 5B HAVE SMALL INCLUSIONS OF ALTERED
SEDIMENT;
Vesicles : Size(mm): <1 Percent: 1-2
Location: Filling: SMEC,CALCITE
ONE LARGE VESICLE (1CM) OCCURS IN PCE 10B;
Phenocrysts: PLAGIOCLASE ( 8-16%)
Size(mm): <6
FRESH;
OLIVINE ( 1-2%)
Size(mm): <2
ALTERED TO SMEC;
CLINOPYROXENE ( 1-2%)
Size(mm): <2
FRESH;
Replacement: CALCITE
SMECTITE
Minerals Replaced: OL,GLASS
ZEOLITE
PINK OR ANALCITE IN SPOTS (1CM) ALONG BRECCIA
MARGINS, INDEX OF REFRACTION ALPHA 1.576 AND
GAMMA 1.579;
Leg : 52 Top/Bottom Interval(mm): 0/1480 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 408.48
Core: 28 Top of Core Depth (m) : 402.50
Sect: 4 Top of Section Depth(m): 407.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT AND BASALTIC BRECCIA;
PILLOW;
Piece No. : PCE 1 (3-24), 2 (27-29), 3A (33-35), 3B (35-41),
3C (42-49), 3D (50-56), 4 (59-67), 5 (70-72),
6A (76-88), 6B (89-94), 7 (97-108), 8 (111-116),
9A (119-135), 9B (136-148);
Texture : PLAG-OL-CPX PHYRIC, BASALTIC BRECCIA COMPOSED OF
ALTERED GLASS OCCURS MOSTLY IN PCE 3, PCE 7 CONTAINS
RECRYSTALLIZED CARBONATE SEDIMENT, CLASTS ARE
ALTERED GLASS AND FINE-GRAINED PILLOW MARGINS,
BRECCIA COMPOSED OF ANGULAR GLASS AND BASALT
FRAGMENTS IN A MATRIX OF GREEN SMEC, GNDMASS FINE
GRAINED TO GLASSY;
Structure : SPARSE VEINS FILLED WITH SMEC+CARB;
Alteration : SLIGHTLY;
MODERATELY
IN BRECCIA ZONES AND VEINS, GLASS ALTERED TO SMEC;
Vesicles : Size(mm): Percent: 1
Location: Filling: SMEC,CARB
Groundmass : PLAGIOCLASE
NO NEEDLES;
OLIVINE
ALTERED;
Phenocrysts: PLAGIOCLASE ( 0-15%)
Size(mm): <8
FRESH TO SLIGHTLY ALTERED, UNEVEN DISTRIBUTION;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <1
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
ZEOLITE
PINK IN BRECCIA ZONES;
Leg : 52 Top/Bottom Interval(mm): 0/ 550 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 409.05
Core: 28 Top of Core Depth (m) : 402.50
Sect: 5 Top of Section Depth(m): 408.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-14), 2 (17-34), 3 (37-47), 4 (50-55);
Texture : PLAG-OL PHYRIC, GNDMASS FINE-GRAINED TO GLASSY;
Structure : SCATTERED VEINLETS FILLED WITH SMEC+CARB+MINOR
PYRITE;
Alteration : SLIGHTLY
GLASS ALTERED TO SMEC, FRESH GLASS IN PCE 1,
MAJOR ALTERATION ALONG VEINS AND GLASSY PILLOW
SELVAGES;
Comments : CORE CATCHER INCLUDES PCES 3-4;
Vesicles : Size(mm): <0.5 Percent: 1
Location: Filling: CARB
Groundmass : PLAGIOCLASE
NO NEEDLES;
OLIVINE
ALTERED;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <8
FRESH;
OLIVINE ( 2%)
Size(mm): <2
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1420 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 412.92
Core: 29 Top of Core Depth (m) : 411.50
Sect: 1 Top of Section Depth(m): 411.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT AND BASALTIC
BRECCIA;
PILLOW;
Piece No. : PCE 1 (3-7), 2 (10-13), 3 (16-21), 4 (25-27),
5A (30-40), 5B (41-48), 6A (52-60), 6B (60-68),
7 (73-84), 8 (87-103), 9 (106-120), 10 (122-129),
11A (132-138), 11B (138-142);
Texture : PLAG-OL MODERATELY PHYRIC, INCIPIENT BRECCIATION IN
MANY PCES, GNDMASS FINE-GRAINED TO GLASSY;
Structure : VEINS AND VEINLETS FILLED WITH SMEC+CARB+MINOR
PYRITE, A PINKISH VEIN MINERAL IS ZEOLITE;
Alteration : MOD
PCE 4-5A, 6B-7, TOP OF 8, 9-10;
SLIGHTLY
REST OF SECTION, ALTERATION CONFINED TO GLASSY
SELVAGES AND VEINS;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: CARB
Groundmass : PLAGIOCLASE
NO NEEDLES;
OLIVINE
ALTERED;
Phenocrysts: PLAGIOCLASE ( 8%)
Size(mm): <8
FRESH, WHEN ALTERED BLUE GREEN;
OLIVINE ( 1-2%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
PYRITE
ZEOLITE
PINK VEIN MINERAL, REFRACTIVE INDEX IS 1.478,
COLORLESS EXCEPT FOR OXIDATION ON CLEAVAGES;
Leg : 52 Top/Bottom Interval(mm): 0/ 940 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 413.94
Core: 29 Top of Core Depth (m) : 411.50
Sect: 2 Top of Section Depth(m): 413.00
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-5), 1B (5-9), 2 (11-16), 3 (18-30),
4 (34-38), 5 (41-46), 6 (48-52), 7A (54-63),
7B (64-69), 8 (71-75), 9 (77-82), 10 (86-94);
Texture : PLAG-OL PHYRIC, GLASSY BRECCIATED MARGINS IN PCES
2-5, GNDMASS FINE-GRAINED TO GLASSY;
Structure : VEINS FILLED WITH SMEC+CARB;
Alteration : MOD
GNDMASS CONVERTED TO CLAY.MINS, GLASS SELVAGES
ALTERED TO SMEC;
Vesicles : Size(mm): Percent: 1
Location: Filling: SMEC,CALCITE
Groundmass : CLAY
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <7
FRESH;
OLIVINE ( 1-2%)
Size(mm): <2
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
SILICA
THIN FILMS OF OPAL IN BRECCIA IN PCE 2;
Leg : 52 Top/Bottom Interval(mm): 0/ 170 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 414.67
Core: B 1 Top of Core Depth (m) : 414.50
Sect: Top of Section Depth(m): 414.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (1-17);
Texture : PLAG-OL MODERATELY PHYRIC, GLASSY MARGIN AT TOP OF
PILLOW, GNDMASS FINE-GRAINED TO GLASSY;
Structure : SEVERAL VEINS FILLED WITH SMEC+CARB;
Alteration : SLIGHTLY
GLASS ALTERED TO SMEC;
Comments : THIS PCE WAS FOUND IN BIT DURING BIT CHANGE AFTER
CORE 29;
Vesicles : Size(mm): <0.5 Percent: 1
Location: Filling: CARB
Groundmass : OLIVINE
PROMINENT, ALTERED TO SMEC;
Phenocrysts: PLAGIOCLASE ( 8%)
Size(mm): <5
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 415.97
Core: 30 Top of Core Depth (m) : 414.50
Sect: 1 Top of Section Depth(m): 414.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-26), 2 (29-36), 3 (40-47), 4A (51-58),
4B (58-70), 4C (71-82), 4D (82-88), 5A (92-100),
5B (101-109), 5C (110-118), 5D (120-130),
5E (131-147);
Texture : PLAG-OL-CPX PHYRIC, GLASSY SELVAGES SCATTERED,
GNDMASS FINE-GRAINED TO GLASSY;
Structure : THICK COMPLEX VEINS OCCUR THROUGHOUT, PCES 3-4A
CONTAIN COARSELY CRYSTALLINE CARB+SMEC VEIN 15CM
THICK WITH CALCITE XTLS >5MM IN DIAMETER;
Alteration : SLIGHTLY
SOME VEINS ARE OXDIZED, GLASS ALTERED TO SMEC,
FRESH GLASS AT 88CM, OXIDATION OF VEINS PRODUCES
BRIGHT RED AND YELLOW SMECTITES;
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC
VUG (5CM IS DIAMETER) OCCURS AT 120CM WITH
CALCITE XTLS <2CM GROWING ON WALLS;
Groundmass : PLAGIOCLASE
OLIVINE
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <8
FRESH OR BLUE-GREEN TO YELLOW NEAR FRACTURES;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <0.5
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
Leg : 52 Top/Bottom Interval(mm): 0/1440 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 417.44
Core: 30 Top of Core Depth (m) : 414.50
Sect: 2 Top of Section Depth(m): 416.00
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-10), 1B (11-19), 2A (21-51), 2B (51-68),
3 (71-74), 4 (76-84), 5A (86-89), 5B (90-96),
6A (98-114), 6B (114-135), 7 (139-144);
Texture : PLAG-OL PHYRIC, COOLING MARGINS, GNDMASS FINE
GRAINED TO GLASSY;
Structure : VEINS FILLED WITH SMEC+CARB+MINOR PYRITE, PCE 5A IS
INTERPILLOW SPACE BETWEEN GLASSY MARGINS FILLED WITH
SMEC+CARB;
Alteration : MOD
GLASS SELVAGES ALTERED TO SMEC;
Vesicles : Size(mm): <0.5 Percent: <1
Location: Filling: SMEC,CALCITE
Shape : ROUND
Location: Filling: PYRITE
SOME IRREGULAR, FILLED WITH DARK GREEN CLAY;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
FRESH;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1480 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 418.98
Core: 30 Top of Core Depth (m) : 414.50
Sect: 3 Top of Section Depth(m): 417.50
LITHOLOGY: PLAG-OL MODERATELY TO PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-11), 1B (12-31), 1C (30-38), 2A (40-70),
2B (70-77), 3 (80-83), 4A (86-93), 4A1 (93-101),
5A (104-108), 5B (108-117), 5C (116-121),
5D (122-131), 5E (129-144), 5F (143-148);
Texture : PLAG-OL MODERATELY TO PHYRIC, PHENOS MORE ABUNDANT
IN PILLOW CENTERS AND LESS ABUNDANT IN QUENCHED
RIMS, GNDMASS FINE-GRAINED TO GLASSY, PCE 6 IS ONE
SMALL PILLOW SHOWING XTL SETTLING WITH APHYRIC TOP,
PCE 5 IS A BRECCIATED PILLOW SHOWING HOT BRECCIATION
AS GLASS IS DEVELOPED ALONG NUMEROUS FRACTURES;
Alteration : SLIGHTLY;
GLASS SELVAGES ALTERED TO SMEC;
Phenocrysts: PLAGIOCLASE ( 6-12%)
Size(mm): <5
FRESH;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
Leg : 52 Top/Bottom Interval(mm): 0/ 830 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 419.83
Core: 30 Top of Core Depth (m) : 414.50
Sect: 4 Top of Section Depth(m): 419.00
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-8), 2 (12-17), 3 (22-28), 4 (32-35),
5 (38-42), 6 (46-48), 7A (52-61), 7B (62-68),
8 (72-78), 9 (81-83);
Texture : PLAG-OL PHYRIC, MOST FRAGMENTS HAVE GLASSY MARGIN
STRUCTURE, MINOR HYALOCLASTIC BRECCIA IN PCE 7A,
GNDMASS FINE-GRAINED TO GLASSY;
Structure : PCE 5 HAS THICK CARB+SMEC VEIN;
Alteration : MOD
ALTERATION HEAVY IN VEINS, RED AND YELLOW SMEC
OCCURS THROUGHOUT, GLASS ALTERED TO SMEC;
Comments : PCES 8-9 ARE CORE CATCHER;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <4
FRESH OR WHERE ALTERED BLUE-GREEN TO YELLOW;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 423.47
Core: 31 Top of Core Depth (m) : 422.00
Sect: 1 Top of Section Depth(m): 422.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-21), 2A (24-36), 2B (37-48), 2C (49-54),
2D (55-60), 3A (62-66), 3B (68-71), 4 (74-77),
5 (81-91), 6 (93-111), 7 (114-121), 8 (124-136),
9 (138-147);
Texture : PLAG-OL-CPX PHYRIC, HYALOCLASTITE ATTACHED TO
PILLOW MARGIN IN PCE 3A, MOST OF BREAKAGE IS SIMPLE
COMPACTION OR PART OF ERUPTIVE PROCESS, GNDMASS IS
FINE-GRAINED TO GLASSY;
Structure : HEAVILY VEINED AND FRACTURED PARTICULARLY IN PCE 2,
VEINS FILLED WITH SMEC+CARB+MINOR PYRITE;
Alteration : MOD
GLASS ALTERED TO SMEC, ALTERATION INTENSE IN
BRECCIAS AND ALONG VEINS;
Vesicles : Size(mm): Percent: 1
Location: Filling: SMEC,CARB
Groundmass : PLAGIOCLASE
OLIVINE
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <6
YELLOW OR BLUE-GREEN ALTERATION, PROMINENT ZONES
OF GLASSY INTRUSIONS;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <4
SUBROUNDED, FRESH;
Replacement: CARBONATE
SMECTITE
Minerals Replaced: OL,GLASS
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1460 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 424.96
Core: 31 Top of Core Depth (m) : 422.00
Sect: 2 Top of Section Depth(m): 423.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BRECCIA;
Piece No. : PCE 1A (2-17), 1B (17-21), 2 (24-28), 3A (32-41),
3B (42-47), 3C (48-52), 4 (55-61), 5 (64-72),
6 (74-80), 7 (83-92), 8 (93-99), 9A (102-108),
9B (108-114), 10 (116-122), 11 (125-132),
12 (134-139), 13 (142-146);
Texture : PLAG-OL PHYRIC, NARROW GLASSY MARGINS IN EACH PCE,
MAXIMAL THICKNESS OF SEPARATE BRECCIA ZONES IS 10CM,
ANGULAR FRAGMENTS OF CRYSTALLINE BASALT AND GLASS IN
A MATRIX OF DARK GREEN SMEC+CARB+MINOR PINK ZEOLITE;
Alteration : EXTENSIVELY
GLASS ALTERED TO SMEC;
Phenocrysts: PLAGIOCLASE (12-14%)
Size(mm): <7
PARTLY ALTERED TO SMEC;
OLIVINE ( 1-2%)
Size(mm): <2
ALTERED TO SMEC;
Replacement: CALCITE
CEMENT OF BRECCIA;
SMECTITE
Minerals Replaced: OL,GLASS
ZEOLITE
Leg : 52 Top/Bottom Interval(mm): 0/1320 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 426.32
Core: 31 Top of Core Depth (m) : 422.00
Sect: 3 Top of Section Depth(m): 425.00
LITHOLOGY: PLAG-OL MODERATELY TO PHYRIC BASALTIC AND BASALTIC
BRECCIA;
Piece No. : PCE 1 (2-10), 2 (14-25), 3 (29-39), 4A (42-47),
4B (48-55), 5 (58-65), 6 (70-79), 7 (83-88),
8 (92-96), 9 (98-100), 10 (104-108), 11 (112-117),
12A (120-127), 12B (129-131);
Texture : PLAG-OL MODERATELY TO PHYRIC, BRECCIA IS
HYALOCLASTITE COMPOSED OF FINE GLASSY MATRIX AND
CLASTS OF GLASSY PILLOW MARGINS, GNDMASS FINE
GRAINED TO GLASSY;
Alteration : MOD
GLASS ALTERED TO SMEC;
Comments : PCES 11-12B ARE CORE CATCHER;
Vesicles : Size(mm): <0.5 Percent: 1-3
Location: Filling: CARB
Groundmass : PLAGIOCLASE
OLIVINE
Phenocrysts: PLAGIOCLASE ( 5-15%)
Size(mm): <5
WHEN ALTERED ALONG CRACKS APPEAR BLUE-GREEN OR
YELLOW;
OLIVINE ( 1-2%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: CARBONATE
SMECTITE
Minerals Replaced: OL,GLASS,PLAG
SILICA
ZEOLITE
PINK;
Leg : 52 Top/Bottom Interval(mm): 0/1200 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 432.20
Core: 32 Top of Core Depth (m) : 431.00
Sect: CC Top of Section Depth(m): 431.10
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-6), 2 (9-12);
Texture : PLAG-OL PHYRIC, GNDMASS FINE-GRAINED;
Structure : MINOR VEINS FILLED WITH SMEC;
Alteration : MOD;
Vesicles : Size(mm): Percent: 1
Location: Filling: SMEC
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
Leg : 52 Top/Bottom Interval(mm): 0/1500 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 441.50
Core: 33 Top of Core Depth (m) : 440.00
Sect: 1 Top of Section Depth(m): 440.00
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-12), 2 (14-26), 3A (28-30), 3B (30-35),
3C (35-50), 3D (50-66), 3E (66-69), 4A (72-93),
4B (92-104), 5 (107-110), 6 (114-132),
7A (135-146), 7B (147-150);
Texture : PLAG-OL PHYRIC, GLASSY MARGINS, LOCAL BRECCIA IN
PILLOWS, GNDMASS FINE-GRAINED TO GLASSY;
Structure : SCATTERED VEINS FILLED WITH SMEC+CALCITE+MINOR
PYRITE;
Alteration : MOD
OXIDATION ALONG FISSURES, GLASS ALTERED TO SMEC;
Vesicles : Size(mm): Percent: 1
Location: Filling: CARB,SMEC
VUG AT 50CM FILLED WITH SMEC+CALCITE+ZEOLITE+MINOR
PYRITE;
Groundmass : CALCITE IN GNDMASS;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <10
PARTLY ALTERED TO SMEC AND STAINED GREEN OR BLUE-
GREEN, MICROPHENOS 0.5-1MM;
OLIVINE ( 1%)
Size(mm): <3
ALTERED TO SMEC;
Replacement: CALCITE
SMECTITE
Minerals Replaced: OL,GLASS
PYRITE
ZEOLITE
Leg : 52 Top/Bottom Interval(mm): 0/1430 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 442.93
Core: 33 Top of Core Depth (m) : 440.00
Sect: 2 Top of Section Depth(m): 441.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT AND BASALTIC
BRECCIA;
PILLOW;
Piece No. : PCE 1 (3-15), 2 (18-23), 3 (25-35), 4A1 (37-38),
4A (39-46), 4B (47-60), 4C (61-67), 5 (70-75),
6A (78-93), 6B (94-105), 7A (107-119),
7B (120-128), 7C (128-136), 7D (136-143);
Texture : PLAG-OL MODERATELY PHYRIC, MINOR BRECCIA OCCURS IN
PCE 1 AND 4A, BRECCIA CONSISTS OF CRYSTALLINE
BASALT FRAGMENTS AND ALTERED GLASS CHIPS IN A
MATRIX OF GREEN SMEC+CALCITE+ZEOLITE, GLASSY RINDS
ON CLASTS THROUGHOUT, GNDMASS FINE-GRAINED TO
GLASSY;
Structure : HIGHLY FRACTURED, PILLOW INTERIORS IN PCES 2 AND
5-7;
Alteration : MOD
GLASS ALTERED TO SMEC, BROWN OXIDATION ALONG MOST
FRACTURES;
Phenocrysts: PLAGIOCLASE ( 7-10%)
Size(mm): <5
PARTLY ALTERED TO SMEC+CARB(?);
OLIVINE ( 1-3%)
Size(mm): <1.5
ALTERED TO SMEC;
Replacement: CALCITE
Minerals Replaced: PLAG
SMECTITE
Minerals Replaced: OL,PLAG,GLASS
ZEOLITE
Leg : 52 Top/Bottom Interval(mm): 0/1460 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 444.46
Core: 33 Top of Core Depth (m) : 440.00
Sect: 3 Top of Section Depth(m): 443.00
LITHOLOGY: PLAG-OL PHYRIC BASALT AND BASALTIC BRECCIA;
PILLOW;
Piece No. : PCE 1A (2-8), 1B (8-17), 1C (17-20), 1D (22-26),
2 (30-40), 3 (43-50), 4A (53-64), 4B (65-78),
4C (78-85), 5 (87-91), 6 (94-100), 7 (102-108),
8A (110-118), 8B (118-128), 8C (128-138),
8D (138-146);
Texture : PLAG-OL PHYRIC, MINOR HYALOCLASTIC BRECCIA CONSISTS
OF ALTERED GLASS FRAGMENTS IN A MATRIX OF GREENISH
BROWN SMEC+CALCITE, GNDMASS IS VERY FINE-GRAINED TO
GLASSY;
Structure : VEINS FILLED WITH SMEC+CALCITE+MINOR PYRITE;
Alteration : MOD
GLASS ALTERED TO SMEC, OXIDATION ALONG FISSURES
AND VEINS;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: CALCITE
Shape : ROUND
Groundmass : PLAGIOCLASE
NEEDLES 0.5-1MM;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <8
PARTLY ALTERED TO BLUE-GREEN SMEC;
OLIVINE ( 1%)
Size(mm): <6
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,PLAG,GLASS
CALCITE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1490 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 445.99
Core: 33 Top of Core Depth (m) : 440.00
Sect: 4 Top of Section Depth(m): 444.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-13), 1B (14-27), 2A (30-39), 2B (40-47),
2C (48-57), 2D (58-65), 3 (68-77), 4 (80-82),
5 (85-89), 6A (92-101), 6B (102-109), 6C (110-121),
6D (122-134), 6E (135-141), 6F (142-146),
6G (147-149);
Texture : PLAG-OL PHYRIC, SOME GLASSY SELVAGES, GNDMASS FINE
GRAINED TO GLASSY;
Structure : VEINS ARE FILLED WITH SMEC+CARB AND PYRITE (IN
UNOXIDIZED VEINS);
Alteration : MOD
GLASS ALTERED TO SMEC, MORE ALTERATION NEAR VEINS
AND GLASSY SELVAGES;
Vesicles : Size(mm): <0.5 Percent: 1
Location: Filling: CARB,SMEC
Groundmass : PLAGIOCLASE
OLIVINE
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <8
FRESH OR GREEN TO YELLOW;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,PLAG,GLASS
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 447.47
Core: 33 Top of Core Depth (m) : 440.00
Sect: 5 Top of Section Depth(m): 446.00
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-8), 1B (8-15), 1C (15-24), 2 (26-57),
3 (60-64), 4A (68-84), 4B (85-89), 4C (90-99),
4D (100-110), 4E (111-118), 4F (119-136),
4G (136-147);
Texture : PLAG-OL PHYRIC, GLASS SELVAGES, GNDMASS FINE-
GRAINED TO GLASSY;
Structure : VEINS FILLED WITH SMEC+CALCITE, SPHERULES OF GREEN
CLAY FILLING THICK IRREGULAR VEIN IN PCE 4E-F;
Alteration : MODERATELY
GLASS ALTERED TO SMEC, OXIDATION ALONG VEINS;
Vesicles : Size(mm): <0.2 Percent: <1
Location: Filling: SMEC,CALCITE
Shape : ROUND
Location: Filling: PYRITE
SOME IRREGULAR;
Groundmass : MOTTLED IN PCE 2 DUE TO PHENOS DISTRIBUTION;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
FRESH OR STAINED YELLOW OR GREEN;
OLIVINE ( 1-2%)
Size(mm): <2
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,PLAG,GLASS
CALCITE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1450 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 448.95
Core: 33 Top of Core Depth (m) : 440.00
Sect: 6 Top of Section Depth(m): 447.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-11), 2 (14-19), 3A (23-31), 3B (32-36),
4 (42-49), 5A (53-62), 5B (64-74), 6A (77-87),
6B (88-99), 7 (103-106), 8 (109-116), 9A (119-127),
9B (129-136), 10 (140-145);
Texture : PLAG-OL PHYRIC, VERY THICK SMEC RIMS TO PILLOWS
INCLUDING A 5CM PCE (PCE 2) MAY REPRESENT IN SITU
HYALOCLASTITE OR BRECCIA, GNDMASS FINE-GRAINED TO
GLASSY;
Structure : VEINS FILLED WITH SMEC+CARB;
Alteration : SLIGHTLY
GLASS ALTERED TO SMEC, HEAVILY OXIDIZED NEAR VEINS
AND FRACTURES;
Vesicles : Size(mm): <0.5 Percent: 1
Location: Filling: CARB,SMEC
Groundmass : PLAGIOCLASE
NEEDLES;
OLIVINE
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <4
USUALLY FRESH OR STAINED YELLOW OR GREEN;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
PHENOS UNEVENLY DISTRIBUTED WITHIN PILLOWS;
Replacement: SMECTITE
Minerals Replaced: OL,PLAG,GLASS
CARBONATE
SILICA
ZEOLITE
Leg : 52 Top/Bottom Interval(mm): 0/0210 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 449.21
Core: 33 Top of Core Depth (m) : 440.00
Sect: 7 Top of Section Depth(m): 449.00
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-8), 1B (9-14), 1C (14-21);
Texture : PLAG-OL PHYRIC, GLASSY SELVAGES, GNDMASS FINE-
GRAINED TO GLASSY;
Alteration : MOD
QUITE OXIDIZED;
Vesicles : Size(mm): <0.5 Percent: 1
Location: Filling: SMEC,CARB
Groundmass : PLAGIOCLASE
OLIVINE
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <6
FRESH OR BLUE-GREEN TO YELLOW TO BLACK ALTERATION;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,PLAG,GLASS
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1440 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 450.44
Core: 34 Top of Core Depth (m) : 449.00
Sect: 1 Top of Section Depth(m): 449.00
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-11), 2A (14-25), 2B (26-35), 2C (35-39),
2D (40-55), 2E (56-82), 2F (83-105), 2G (106-120),
2H (121-136), 2I (137-144);
Texture : PLAG-OL PHYRIC, GLASS SELVAGES, GNDMASS FINE-GRAINED
TO GLASSY;
Structure : TWO PILLOWS (1-2B) AND (2C-2I), VEINS FILLED WITH
SMEC + PYRITE, PCE 2I IS AN ALTERED PILLOW MARGIN
WITH 5CM THICK VEIN OF SMEC + CARB ATTACHED;
Alteration : MOD
GLASS ALTERED TO SMEC + ZEOLITE, HALF OF THE VEINS
OXIDIZED TO RED AND YELLOW SMEC WHILE OTHER HALF
GREEN SMEC + PYRITE;
Vesicles : Size(mm): <0.5 Percent: 1
Location: Filling: SMEC,CARB
Groundmass : PLAGIOCLASE
OLIVINE
Phenocrysts: PLAGIOCLASE ( 8-10%)
Size(mm): <6
FRESH OR STAINED GREEN TO YELLOW TO BLACK;
OLIVINE ( 2%)
Size(mm): <2
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,PLAG,GLASS
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1410 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 451.91
Core: 34 Top of Core Depth (m) : 449.00
Sect: 2 Top of Section Depth(m): 450.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-11), 1B (12-16), 1C (13-16), 2A (20-24),
2B (25-30), 3 (34-61), 4 (65-69), 5A (74-80),
5B (80-92), 5C (93-117), 5D (112-132), 5E (133-141);
Texture : PLAG-OL MODERATELY PHYRIC, THICK GLASSY SELVAGES
OCCUR IN PCE 1A AND 5A, GNDMASS FINE-GRAINED TO
GLASSY;
Structure : VEINS FILLED WITH SMEC+CARB+PYRITE;
Alteration : SLIGHTLY;
GLASS ALTERED TO SMEC, MORE ALTERATION ALONG VEINS
AND GLASSY SELVAGES;
Vesicles : Size(mm): <0.5 Percent: 1
Location: Filling: SMEC,CARB
Groundmass : PLAGIOCLASE
OLIVINE
Phenocrysts: PLAGIOCLASE ( 8-10%)
Size(mm): <6
FRESH OR STAINED YELLOW TO GREEN TO BLACK;
OLIVINE ( 1%)
Size(mm): <1.5
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,PLAG,GLASS
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1500 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 453.50
Core: 34 Top of Core Depth (m) : 449.00
Sect: 3 Top of Section Depth(m): 452.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT AND BASALTIC BRECCIA;
PILLOW;
Piece No. : PCE 1A (2-16), 1B (16-20), 2 (23-28), 3A (32-38),
3B (39-48), 4A (52-56), 4B (56-64), 5 (66-72),
6A (74-78), 6B (79-81), 7A (84-92), 7B (93-95),
8 (98-106), 9 (109-114), 10 (118-121),
11A (123-130), 11B (130-141), 11C (142-150);
Texture : PLAG-OL-CPX PHYRIC, HYALOCLASTITE BRECCIA WITH
VERY FINE PILLOW MARGINS QUENCHED AGAINST THEM,
GNDMASS FINE-GRAINED TO GLASSY, BRECCIA CONSISTS OF
CRYSTALLINE BASALT AND ALTERED SIDEROMELANE
FRAGMENTS IN A MATRIX OF DARK GREEN SMEC + CARB +
ZEOLITE;
Alteration : SLIGHTLY;
FRESH GLASS AT 20CM, ALTERATION MOSTLY CONFINED TO
VEINS AND BRECCIAS;
Groundmass : PLAGIOCLASE
OLIVINE
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <6
FRESH OR STAINED YELLOW TO GREEN TO BLACK;
OLIVINE ( 1%)
Size(mm): <4
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <2
SUBHEDRAL, FRESH;
Replacement: SMECTITE
Minerals Replaced: OL,PLAG,GLASS
CARBONATE
ZEOLITE
Leg : 52 Top/Bottom Interval(mm): 0/1300 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 454.80
Core: 34 Top of Core Depth (m) : 449.00
Sect: 4 Top of Section Depth(m): 453.50
LITHOLOGY: PLAG-OL PHYRIC BASALT AND BASALTIC BRECCIA;
PILLOW;
Piece No. : PCE 1A (2-13), 1B (13-20), 2 (23-27), 3 (31-35),
4 (37-42), 5 (44-48), 6 (51-55), 7A (58-66),
7B (67-70), 8A (72-83), 8B (84-91), 9A (93-103),
9B (103-114), 10 (116-120), 11 (123-130);
Texture : PLAG-OL PHYRIC, BRECCIATED GLASSY MARGINS IN PCES
2-7 AND 8B-11, GNDMASS FINE-GRAINED TO GLASSY;
Structure : VEINS FILLED WITH CALCITE + SMEC;
Alteration : EXTENSIVELY
GLASS ALTERED TO SMEC;
Vesicles : Size(mm): <5 Percent: 2-3
Location: Filling: CALCITE,SMEC
Shape : ROUND
SOME IRREGULAR;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
FRESH;
OLIVINE ( 3-4%)
Size(mm): <1
ALTERED TO SMEC (LIGHT GREEN);
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
ZEOLITE
MORDENITE <1%;
Leg : 52 Top/Bottom Interval(mm): 0/1430 Analyst: Bryan, W.
Hole: 418A Sample Midpoint (m) : 456.43
Core: 34 Top of Core Depth (m) : 449.00
Sect: 5 Top of Section Depth(m): 455.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT AND BASALTIC
BRECCIA;
PILLOW;
Piece No. : PCE 1A (2-12), 1B (11-18), 1C (18-25), 2A (27-34),
2B (35-46), 2C (46-54), 3 (56-65), 4 (67-74),
5 (77-80), 6A (82-92), 6B (92-102), 6C (101-108),
6D (109-119), 6E (120-125), 7 (128-130),
8 (135-142);
Texture : PLAG-OL MODERATELY PHYRIC, BRECCIA CONSISTS OF
CRYSTALLINE BASALT AND ALTERED SIDEROMELANE
FRAGMENTS IN A MATRIX OF DARK GREEN SMEC + CARB,
GNDMASS APHANITIC VARIOLITIC;
Structure : VEINS FILLED WITH SMEC + CARB, HIGHLY FRACTURED;
Alteration : MOD
BROWNISH ALTERATION ALONG FRACTURES;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <2
STAINED AND ALTERED TO SMEC, SUBHEDRAL OR ROUND;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/ 450 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 456.95
Core: 34 Top of Core Depth (m) : 449.00
Sect: 6 Top of Section Depth(m): 456.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT AND BASALTIC
BRECCIA;
PILLOW;
Piece No. : PCE 1A (2-14), 1B (14-25), 1C (25-45);
Texture : PLAG-OL MODERATELY PHYRIC, BRECCIA ALONG AXIS OF
CORE, GNDMASS FINE-GRAINED;
Structure : A LARGE VEIN ALONG SIDE OF CORE IS FILLED WITH SMEC
AND CALCITE;
Alteration : MODERATELY;
Comments : CORE CATCHER PART OF THIS SECTION;
Vesicles : Size(mm): <3 Percent: 3
Location: Filling: CALCITE,SMEC
Groundmass : PLAGIOCLASE
FRESH MICROLITES;
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): <7
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC LIGHT GREEN OR BROWN;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 52 Top/Bottom Interval(mm): 0/1440 Analyst: Bryan, W.
Hole: 418A Sample Midpoint (m) : 459.44
Core: 35 Top of Core Depth (m) : 458.00
Sect: 1 Top of Section Depth(m): 458.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT AND BASALTIC
BRECCIA;
Piece No. : PCE 1 (2-8), 2 (11-13), 3A (16-28), 3B (28-33),
3C (33-42), 3D (42-51), 3E (52-56), 3F (57-65),
4 (68-84), 5 (87-92), 6 (93-96), 7 (98-105),
8 (107-111), 9A (113-121), 9B (121-125),
9C (125-132), 9D (132-137), 9E (137-144);
Texture : PLAG-OL MODERATELY PHYRIC, BRECCIA CONSISTS OF
APHANITIC BASALT FRAGMENTS IN A MATRIX OF CARB +
SMEC, BRECCIATION MINOR IN PCES 1-3 BUT INCREASES
TOWARD BOTTOM OF SECTION, PCES 3E-4 HAVE SMALL
BRECCIA REGIONS WHILE PCES 4-7 ARE PREDOMINANTLY
BRECCIA, PCE 8 IS APHANITIC, VARIOLITIC BASALT OUT
OF BRECCIA, GNDMASS FINELY CRYSTALLINE TO APHANITIC;
Structure : SPARSE VEINLETS FILLED WITH CARB + SMEC, FRACTURES
COMMON;
Alteration : MOD
BROWN ALTERATION COMMON AROUND FRACTURES, VEINS
AND BRECCIA MATRIX;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <3
PARTLY ALTERED TO SMEC, SUBHEDRAL;
OLIVINE ( 1%)
Size(mm): <3
ALTERED TO SMEC, LARGE EUHEDRAL OR SMALLER
SUBHEDRAL;
Replacement: SMECTITE
Minerals Replaced: OL,PLAG
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1430 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 460.93
Core: 35 Top of Core Depth (m) : 458.00
Sect: 2 Top of Section Depth(m): 459.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT AND BASALTIC
BRECCIA;
PILLOW;
Piece No. : PCE 1 (2-9), 2 (12-16), 3A (18-27), 3B (29-36),
4 (41-43), 5A (47-54), 5B (55-61), 5C (62-70),
5D (70-84), 5E (85-92), 6 (95-103), 7A (107-116),
7B (117-127), 7C (128-136), 8 (140-143);
Texture : PLAG-OL MODERATELY PHYRIC, BRECCIAS ARE BROKEN
PILLOW FRAGMENTS OR HYALOCLASTITES IN WHICH GLASS IS
NOT ALTERED TO SMEC, GNDMASS VERY FINE-GRAINED TO
GLASSY, BRECCIAS PROBABLY IN SITU, (PILLOW
BRECCIAS OR HYALOCLASTITES FORMED DURING ERUPTION);
Structure : VEINS COMMON THROUGHOUT FILLED WITH SMEC + CARB;
Alteration : MOD
BROWN OR YELLOW COLOR DUE TO OXIDATION;
Groundmass : PLAGIOCLASE
OLIVINE
Phenocrysts: PLAGIOCLASE ( 8%)
Size(mm): <6
(LTERE%)
Size(mm): D TO SMEC;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
CLINOPYROXENE ( 0%)
Replacement: SMECTITE
Minerals Replaced: OL,PLAG
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1320 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 462.32
Core: 35 Top of Core Depth (m) : 458.00
Sect: 3 Top of Section Depth(m): 461.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT AND BASALTIC
BRECCIA;
PILLOW;
Piece No. : PCE 1 (2-10), 2 (13-17), 3A (21-31), 3B (31-39),
3C (40-48), 3D (50-53), 4 (57-67), 5 (69-87),
6 (91-98), 7 (100-106), 8A (109-118), 8B (118-125),
9 (128-132);
Texture : PLAG-OL MODERATELY PHYRIC, BRECCIA CONSISTS OF
BROKEN PILLOW FRAGMENTS IN WHICH GLASS IS ALTERED TO
SMEC, GNDMASS APHANITIC TO GLASSY, BRECCIA MARGINS
IN PCES (2,3A,3D,4,6,7,8);
Structure : VEINS LOCALLY PRESENT FILLED WITH SMEC IN PCES 1 AND
4 AND 6;
Alteration : EXTENSIVELY
BROWN ALONG VEINS DUE TO HIGH OXIDATION;
Vesicles : Size(mm): <1 Percent: 1
Location: Filling: SMEC,CALCITE
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): <6
PARTLY ALTERED TO SMEC;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,PLAG
CALCITE
Minerals Replaced: GLASS
SILICA
Minerals Replaced: GLASS
ZEOLITE
Minerals Replaced: GLASS
MORDENITE
Minerals Replaced: GLASS
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 463.97
Core: 35 Top of Core Depth (m) : 458.00
Sect: 4 Top of Section Depth(m): 462.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-22), 2 (25-34), 3A (38-46), 3B (47-50),
3C (51-58), 3D (59-64), 3E (65-71), 3F (72-99),
3G (100-108), 3H (109-111), 4 (115-121),
5 (125-131), 6 (135-138), 7 (143-147);
Texture : PLAG-OL PHYRIC, GNDMASS FINE-GRAINED TO GLASSY;
Alteration : MOD
ZEOLITES FOUND IN ALTERED GLASSY RINDS, BROWN
ALONG FRACTURES;
Vesicles : Size(mm): <0.5 Percent: 1
Location: Filling: SMEC,CARB
Groundmass : PLAGIOCLASE
OLIVINE
Phenocrysts: PLAGIOCLASE (10-15%)
Size(mm): <8
LOCALLY DISCOLORED TO BLUE-GREEN TO YELLOW TO
BROWN;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
CLINOPYROXENE ( 0%)
Replacement: SMECTITE
Minerals Replaced: OL,PLAG,GLASS
CARBONATE
ZEOLITE
Minerals Replaced: GLASS
Leg : 52 Top/Bottom Interval(mm): 0/1010 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 465.01
Core: 35 Top of Core Depth (m) : 458.00
Sect: 5 Top of Section Depth(m): 464.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-10), 1B (11-20), 1C (21-27), 2 (32-48),
3 (52-73), 4 (76-84), 5 (88-91), 6 (94-101);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED TO GLASSY;
Alteration : MOD;
Vesicles : Size(mm): Percent: 1
Location: Filling: SMEC,CARB
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <8
STAINED YELLOW TO GREEN TO BROWN;
OLIVINE ( 1%)
Size(mm): <3
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <1
SUBHEDRAL, FRESH;
Replacement: SMECTITE
Minerals Replaced: OL,PLAG
CARBONATE
Minerals Replaced: GLASS
ZEOLITE
Minerals Replaced: GLASS
SILICA
Minerals Replaced: GLASS
Leg : 52 Top/Bottom Interval(mm): 0/1440 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 468.44
Core: 36 Top of Core Depth (m) : 467.00
Sect: 1 Top of Section Depth(m): 467.00
LITHOLOGY: PLAG-OL MODERATRELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-16), 1B (17-25), 2 (29-35), 3 (38-48),
4 (50-55), 5A (58-67), 5B (68-75), 6 (77-81),
7 (84-88), 8 (91-101), 9 (104-107), 10A (110-118),
10B (118-125), 10C (124-131), 11 (134-144);
Texture : PLAG-OL MODERATELY PHYRIC, MINOR BRECCIATION IN PCE
3, GNDMASS FINE-GRAINED TO GLASSY;
Structure : VEINLETS SCATTERED THROUGHOUT FILLED WITH SMEC +
CALCITE, APPARENT FISSURES;
Alteration : MOD
PCES 6-9;
EXTENSIVELY
REST OF SECTION, VEINS HIGHLY OXIDIZED, BROWN
STAINING ALONG FRACTURES AND VEINLETS;
Vesicles : Size(mm): Percent: 1
Location: Filling: SMEC,CALCITE
PCE 1, RARE ELSEWHERE;
Groundmass : PLAGIOCLASE
LATHS, MICROPHENOS;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <10
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 52 Top/Bottom Interval(mm): 0/1500 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 470.00
Core: 36 Top of Core Depth (m) : 467.00
Sect: 2 Top of Section Depth(m): 468.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-15), 1B (15-23), 2 (26-42), 3 (45-48),
4A (51-67), 4B (67-84), 4C (85-95), 5A (97-124),
5B (125-150);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS FINE-GRAINED TO
GLASSY WITH BLOTCHY TEXTURE IN PCE 4;
Structure : VEINS FILLED WITH CARB + SMEC + ZEOLITE;
Alteration : MOD
BROWN STAINING IN PCE 5, GLASSY SELVAGES ALTERED
TO SMEC, OXIDATION ALONG VEINS;
Vesicles : Size(mm): <1 Percent: 1
Location: Filling: CALCITE,ZEOLITE
CALCITE FILLED VUG OCCURS IN PCE 5B;
Phenocrysts: PLAGIOCLASE ( 5-8%)
Size(mm): <4
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
ZEOLITE
Leg : 52 Top/Bottom Interval(mm): 0/1460 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 471.46
Core: 36 Top of Core Depth (m) : 467.00
Sect: 3 Top of Section Depth(m): 470.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-10), 2A (13-19), 2B (20-40), 2C (44-47),
3A (49-61), 3B (61-70), 3C (71-79), 3D (80-89),
3E (90-92), 4 (95-101), 5A (104-117), 5B (118-125),
6A (128-136), 6B (129-146);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS FINE-GRAINED TO
GLASSY AND MOTTLED IN PCE 6;
Structure : NUMEROUS VEINS FILLED WITH BROWN AND GREEN SMEC AND
CALCITE, INCREASING NUMBER AND SIZE OF VEINS LEAD TO
BRECCIA IN PCE 2A BY CLOSE FRACTURING WITH NO
ROTATION;
Alteration : MOD
PCES (1,2B, 3A-3D, 4-5A, 6B);
EXTENSIVELY
REST OF SECTION, OXIDATION AND BROWN STAINING
ALONG VEINS;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: CALCITE
Phenocrysts: PLAGIOCLASE ( 6%)
Size(mm): <6
FRESH;
OLIVINE ( 1-2%)
Size(mm): <5
ALTERED TO SMEC;
CLINOPYROXENE ( 0%)
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
PYRITE
PCE 6;
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 472.97
Core: 36 Top of Core Depth (m) : 467.00
Sect: 4 Top of Section Depth(m): 471.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-17), 1B (18-27), 1C (28-35), 1D (36-84),
1E (84-94), 2 (98-104), 3 (108-115), 4A (118-127),
4B (128-135), 5 (139-147);
Texture : PLAG-OL PHYRIC, GNDMASS FINE-GRAINED TO GLASSY;
Alteration : SLIGHTLY
BROWN STAINING IN PCES 3-4, ALTERATION INTENSE IN
PCES 2-4;
Vesicles : Size(mm): Percent: 1
Location: Filling: SMEC,CARB
Groundmass : PLAGIOCLASE
OLIVINE
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <6
SLIGHTLY DISCOLORED OTHERWISE FRESH;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
CLINOPYROXENE ( 0%)
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Minerals Replaced: GLASS
ZEOLITE
Minerals Replaced: GLASS
Leg : 52 Top/Bottom Interval(mm): 0/1410 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 474.41
Core: 36 Top of Core Depth (m) : 467.00
Sect: 5 Top of Section Depth(m): 473.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-5), 1B (6-8), 2A (11-17), 2B (18-24),
3A (27-35), 4 (38-40), 5 (43-50), 6 (52-63),
7A (65-76), 7B (76-77), 8A (80-90), 8B (91-93),
8C (94-111), 8D (112-122), 8E (122-128),
9 (132-141);
Texture : PLAG-OL MODERATELY PHYRIC, MINOR INTERPILLOW BRECCIA
OCCURS ON TOP OF PCE 8, SOME GLASSY SELVAGES;
Structure : VEINS FILLED WITH SMEC + CALCITE + ZEOLITE, HIGHLY
FRACTURED;
Alteration : SLIGHTLY
BROWN STAINING ALONG FRACTURES ESPECIALLY PCES
1-3, VEINS OXIDIZED;
Comments : CORE CATCHER IS PCE 9;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: SMEC
Phenocrysts: PLAGIOCLASE ( 5-8%)
Size(mm): <4
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
ZEOLITE
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 477.47
Core: 37 Top of Core Depth (m) : 476.00
Sect: 1 Top of Section Depth(m): 476.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (4-8), 2 (12-20), 3 (24-27), 4 (30-52),
5 (55-60), 6 (62-68), 7 (72-84), 8A (86-96),
8B (95-103), 8C (104-111), 8D (112-131),
8E (130-133), 9 (137-147);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS FINE-GRAINED TO
GLASSY, GLASSY RIMS USUALLY REPLACED IN SITU BY
SMEC ARE MOSTLY WASHED OUT;
Structure : NUMEROUS VEINLETS PRESENT FILLED WITH SMEC +
CALCITE;
Alteration : EXTENSIVELY
BASALT MOSTLY BROWN AND RED DUE TO OXIDATION,
VEINS OXIDIZED;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <8
50% FRESH - REMAINDER MILKY GREEN OR WHITE;
OFTEN CHALKY;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
FERROUS MN OXIDE
Minerals Replaced: GROUNDMASS
Leg : 52 Top/Bottom Interval(mm): 0/ 780 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 478.28
Core: 37 Top of Core Depth (m) : 476.00
Sect: 2 Top of Section Depth(m): 477.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-12), 1B (13-16), 2 (18-30), 3A (32-44),
3B (45-49), 3C (50-57), 3D (58-66), 4 (68-77);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS FINE-GRAINED TO
GLASSY, SOME MICROBRECCIA;
Structure : NUMEROUS VEINLETS FILLED WITH CARB + IRON OXIDES +
SMEC AND QUARTZ, NOTABLE VEIN IN PCE 2;
Alteration : EXTENSIVELY
REDDISH BROWN DUE TO OXIDATION, VEINS HIGHLY
OXIDIZED;
Groundmass : PLAGIOCLASE
NEEDLE-LIKE;
Phenocrysts: PLAGIOCLASE ( 5-8%)
Size(mm): <5
MILKY AND SOFT;
OLIVINE ( 1%)
Size(mm): <1.5
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
FERROUS OXIDE
QUARTZ
Leg : 52 Top/Bottom Interval(mm): 0/1500 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 481.00
Core: 38 Top of Core Depth (m) : 479.50
Sect: 1 Top of Section Depth(m): 479.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT AND BASALTIC
BRECCIA;
PILLOW;
Piece No. : PCE 1A (2-3), 1B (4-6), 1C (7-10), 1D (8-9),
1E (12-15), 2A (18-22), 2B (21-36), 2C (37-47),
3A (49-74), 3B (75-88), 3C (88-94), 4A (97-114),
4B (115-132), 4C (130-150);
Texture : PLAG-OL MODERATELY PHYRIC, HYALOCLASTIC INTERPILLOW
BRECCIA IN PCE 1-4, GNDMASS FINE-GRAINED TO GLASSY;
Alteration : MOD
BROWN STAINING ALONG FRACTURES;
Comments : ALTERED SEDIMENT IN PCE 1 CONSISTS OF BANDED CALCITE
AND FINE LAYERED SANDSTONE WITH GLASS BRECCIA;
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC,CALCITE
Shape : ROUND
SOME FE.OXIDE FILLING AND IRREGULAR SHAPES, PCES
4A-B;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <8
SOMEWHAT CHALKY;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC + FE.OXIDE;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
FERROUS OXIDE
Minerals Replaced: OL
CALCITE
ZEOLITE
PINK IN GLASS BRECCIA;
Leg : 52 Top/Bottom Interval(mm): 0/1460 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 482.46
Core: 38 Top of Core Depth (m) : 479.50
Sect: 2 Top of Section Depth(m): 481.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (4-8), 2A (11-22), 2B (23-34), 2C1 (35-37),
2C (34-44), 3A (47-60), 3B (61-79), 3C (80-93),
4A (97-106), 4B (107-121), 4C (121-141),
4D (142-146);
Texture : PLAG-OL MODERATELY PHYRIC, GLASS AT BASE OF PCE 4D,
GNDMASS FINE-GRAINED TO GLASSY;
Structure : VEINLETS FILLED WITH CALCITE + SMEC + QUARTZ,
FRACTURES PRESENT;
Alteration : EXTENSIVELY
MINOR STAINING ALONG FRACTURES, OXIDATION ALONG
VEINS, ALTERATION IS RATHER STRONG;
Vesicles : Size(mm): <1 Percent: 1
Location: Filling: SMEC,CALCITE
QUARTZ FILLED VUG OCCURS IN PCES 2A-B;
Groundmass : PLAGIOCLASE
NEEDLES;
Phenocrysts: PLAGIOCLASE ( 4-8%)
Size(mm): <4
PARTLY ALTERED TO GREEN SMEC;
OLIVINE ( 1%)
Size(mm): <1.5
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
QUARTZ
Leg : 52 Top/Bottom Interval(mm): 0/1390 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 483.89
Core: 38 Top of Core Depth (m) : 479.50
Sect: 3 Top of Section Depth(m): 482.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-34), 1B (35-51), 2A (58-66), 2B (67-78),
3 (80-85), 4 (87-95), 5 (97-110), 6 (114-116),
7 (120-138);
Texture : PLAG-OL MODERATELY PHYRIC, GLASS BRECCIA IN PCE 2A
HAS MATRIX OF SMEC + ZEOLITE, GNDMASS FINE-GRAINED
TO GLASSY, FRESH GLASS LOCALLY PRESERVED;
Structure : VEINS FILLED WITH SMEC + CALCITE + FE.OXIDE;
Alteration : MOD;
Vesicles : Size(mm): <0.5 Percent: 1
Location: Filling: CALCITE
Shape : ROUND
<1% IN PCE 1B AND 5;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <5
OFTEN STAINED GREEN;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC + FE.OXIDE;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
ZEOLITE
IN SMEC CEMENT OF GLASS BRECCIA IN #2A;
Leg : 52 Top/Bottom Interval(mm): 0/1360 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 485.36
Core: 38 Top of Core Depth (m) : 479.50
Sect: 4 Top of Section Depth(m): 484.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (4-11), 1B (12-20), 1C (20-38), 1C1 (38-40),
1D (41-46), 2 (48-55), 3 (58-66), 4 (68-73),
5A (75-84), 5B (83-95), 6 (98-101), 7 (104-110),
8 (113-119), 9 (122-127), 10 (130-136);
Texture : PLAG-OL MODERATELY PHYRIC, MINOR ALTERED
HYALOCLASTIC BRECCIA OCCURS IN PCE 2, GNDMASS
MEDIUM-GRAINED TO GLASSY, PCE 1 SHOWS DOWNWARD
INCREASE IN GRAIN SIZE FROM MEDIUM-GRAINED AT 28CM
TO VERY FINE-GRAINED AT 45CM;
Structure : VEINLETS FILLED WITH SMEC + MINOR QUARTZ;
Alteration : MOD
MINOR OXIDATION ALONG VEINS;
Vesicles : Size(mm): <1 Percent: 1
Location: Filling: SMEC,CALCITE
Phenocrysts: PLAGIOCLASE ( 3-8%)
Size(mm): <6
SOME ALTERED TO SMEC;
OLIVINE ( 1%)
Size(mm): <1.5
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
PCE 8, OTHERWISE VERY LITTLE IN SECTION;
QUARTZ
ONE QUARTZ VEIN AT TOP OF PCE 10;
Leg : 52 Top/Bottom Interval(mm): 0/1490 Analyst:
Hole: 418A Sample Midpoint (m) : 486.99
Core: 38 Top of Core Depth (m) : 479.50
Sect: 5 Top of Section Depth(m): 485.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-15), 1B (15-23), 2 (25-30), 3A (32-38),
3B (38-41), 4 (45-54), 5 (57-61), 6 (65-72),
7 (75-79), 8A (82-91), 8B (92-104), 8B1 (92-101),
9A (107-109), 9B (111-114), 10 (115-133),
11 (134-140), 12 (142-149);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS FINE-GRAINED TO
GLASSY;
Structure : VEINLETS FILLED WITH CARB + SMEC, PILLOW MARGINS IN
PCES 2-4;
Alteration : MOD
BROWN STAINING ALONG FRACTURES AND VEINLETS;
Vesicles : Size(mm): <0.5 Percent: 1
Location: Filling: SMEC,CARB
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): <6
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 0%)
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/ 820 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 487.82
Core: 38 Top of Core Depth (m) : 479.50
Sect: 6 Top of Section Depth(m): 487.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-11), 2 (15-24), 3 (28-35), 4 (39-41),
5 (44-53), 6 (57-64), 7 (68-75), 8 (80-82);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS FINE-GRAINED TO
GLASSY, GLASSY RINDS;
Structure : VEINLETS FILLED WITH SMEC + CARB;
Alteration : MOD
BROWN STAINING ALONG FRACTURES;
Comments : CORE CATCHER IS PCES 7-8;
Vesicles : Size(mm): <0.5 Percent: 1
Location: Filling: SMEC,CARB
Groundmass : PLAGIOCLASE
OLIVINE
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): <6
COMMONLY STAINED YELLOW TO BLACK TO BLUE-GREEN;
OLIVINE ( 1%)
Size(mm): <3
ALTERED TO SMEC;
CLINOPYROXENE ( 0%)
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1480 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 489.98
Core: 39 Top of Core Depth (m) : 488.50
Sect: 1 Top of Section Depth(m): 488.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (4-6), 2 (9-17), 3 (21-40), 4 (44-58),
5 (62-67), 6 (71-77), 7 (80-92), 8 (95-101),
9 (104-113), 10 (115-129), 11A (133-142),
11B (145-148);
Texture : PLAG-OL PHYRIC, GNDMASS FINE-GRAINED TO GLASSY;
Structure : VEINS AND CRACKS PRESENT;
Alteration : SLIGHTLY
ALTERATION TO SMEC ALONG VEINS OR CRACKS;
Groundmass : PLAGIOCLASE
NEEDLES;
OLIVINE
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <4
OFTEN STAINED BLACK TO GREEN TO YELLOW;
OLIVINE ( 1%)
Size(mm): <1.5
ALTERED TO SMEC;
CLINOPYROXENE ( 0%)
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
ZEOLITE
SILICA
PYRITE
PCES 9-10;
Leg : 52 Top/Bottom Interval(mm): 0/ 470 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 490.47
Core: 39 Top of Core Depth (m) : 488.50
Sect: 2 Top of Section Depth(m): 490.00
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-31), 2A (33-38), 2B (37-47);
Texture : PLAG-OL PHYRIC, TOP OF SECTION HAS GLASSY MARGIN,
GNDMASS FINE-GRAINED TO GLASSY;
Structure : THIN VEINLETS IN PCE 1;
Alteration : MOD
MINOR BROWN STAINING ALONG OXIDIZED VEINS, GLASS
FRAGMENTS OF BASALT BADLY ALTERED IN BRECCIA ZONE;
Vesicles : Size(mm): <1 Percent: 1-2
Location: Filling: SMEC,CALCITE
Groundmass : PLAGIOCLASE
MICROLITES, FRESH;
OLIVINE
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
Minerals Replaced: GLASS
ZEOLITE
Minerals Replaced: GLASS
Leg : 52 Top/Bottom Interval(mm): 0/1480 Analyst:
Hole: 418A Sample Midpoint (m) : 498.98
Core: 40 Top of Core Depth (m) : 497.50
Sect: 1 Top of Section Depth(m): 497.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-3), 1B (3-5), 1C (5-8), 2A (11-29),
2B (30-38), 3 (41-43), 4A (46-66), 4B (67-77),
5 (79-83), 6A (84-94), 6B (94-114), 6C (115-139),
6D (140-148);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS FINE-GRAINED TO
GLASSY;
Structure : VEINLETS FILLED WITH SMEC + CARB, ONE LARGE VEIN
PRESENT IN PCE 4, PILLOW MARGINS ON TOP OF 6A AND
BOTTOM OF 6D;
Alteration : MOD
BROWN STAINING ALONG FRACTURES ESPECIALLY PCE 6;
Comments : RED CHERT IN PCE 1, SEE THIN SECTION DESCRIPTION;
Vesicles : Size(mm): Percent: 2
Location: Filling: SMEC,CARB
MOSTLY PCE 4;
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): <4
SOME STAINED BLUE OR GREEN;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1500 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 500.50
Core: 40 Top of Core Depth (m) : 497.50
Sect: 2 Top of Section Depth(m): 499.00
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-12), 1B (12-18), 2A (20-32), 2B (33-37),
2C (37-51), 2D (51-69), 2E (70-76), 3A (78-96),
3B (97-105), 3C (106-129), 3D (130-142),
3E (142-150);
Texture : PLAG-OL PHYRIC, PILLOW BRECCIA CONSISTING OF GLASSY
AND OXIDIZED LITHIC BASALT FRAGMENTS IN A DARK GREEN
MATRIX OF GLASS ALTERED TO SMEC OCCURS IN PCES 1-2D
AND 3D-E, GNDMASS FINE-GRAINED TO GLASSY;
Structure : VEINS FILLED WITH CALCITE + WHITE ZEOLITE (?);
Alteration : MOD
BROWN OXIDIZED CLASTS IN BRECCIA AND BROWN
STAINING ALONG FRACTURES;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: CALCITE
CALCITE-FILLED VUG IN PCE 3A;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <4
PARTLY ALTERED TO CHALKY WHITE CLAY;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
ZEOLITE
ID ZEOLITE UNCERTAIN;
Leg : 52 Top/Bottom Interval(mm): 0/ 470 Analyst:
Hole: 418A Sample Midpoint (m) : 500.97
Core: 40 Top of Core Depth (m) : 497.50
Sect: 3 Top of Section Depth(m): 500.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
Piece No. : PCE 1A (2-19), 1B (20-37), 1C (38-47);
Texture : PLAG-OL MODERATELY PHYRIC, BRECCIA IN PCE 1C
CONSISTS OF LITHIC BASALT FRAGMENTS IN A MATRIX OF
ALTERED GLASS, GNDMASS FINE-GRAINED TO GLASSY;
Structure : VEINS AND VEINLETS FILLED WITH SMEC + CARB, LATERAL
PILLOW MARGIN IN PCES 1A-B;
Alteration : SLIGHTLY;
Comments : PCE 1C IS CORE CATCHER;
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC,CARB
Groundmass : MINOR SULFIDE OCCURS IN PCE 1B;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <5
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC AND CALCITE;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Minerals Replaced: OL
Leg : 52 Top/Bottom Interval(mm): 0/1500 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 500.00
Core: 41 Top of Core Depth (m) : 498.50
Sect: 1 Top of Section Depth(m): 498.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW BASALT BRECCIA;
Piece No. : PCE 1A (3-4), 1B (4-5), 2 (7-15), 3 (17-24),
4A (26-44), 4B (45-52), 4C (52-66), 4D (66-70),
5 (72-86), 6 (87-91), 7 (93-104), 8A (106-119),
8B (120-135), 8B1 (132-136), 8C (137-150);
Texture : PLAG-OL PHYRIC, BRECCIA MATRIX CONSISTS OF DARK
GREEN SMEC BY ALTERATION OF GLASS, GNDMASS OF CLASTS
IS FINE-GRAINED TO GLASSY;
Alteration : MOD;
Vesicles : Size(mm): Percent: <1
Location: Filling: CALCITE
Phenocrysts: PLAGIOCLASE (12-15%)
Size(mm): <6
FRESH;
OLIVINE ( 1%)
Size(mm): <1.5
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst:
Hole: 418A Sample Midpoint (m) : 501.47
Core: 41 Top of Core Depth (m) : 498.50
Sect: 2 Top of Section Depth(m): 500.00
LITHOLOGY: PLAG-OL PHYRIC BASALTIC BRECCIA;
PILLOW;
Piece No. : PCE 1A (2-16), 1B (16-39), 1C (40-47), 1D (47-55),
1E (56-64), 1F (64-76), 1G (77-84), 1G1 (84-86),
2A (90-104), 2B (105-116), 2C (117-121),
3 (124-127), 4A (130-136), 4A1 (131-136),
4B (137-147);
Texture : PLAG-OL PHYRIC, BRECCIA MATRIX IS DARK GREEN SMEC
BY ALTERATION OF GLASS, GNDMASS OF CLASTS IS VERY
FINE-GRAINED;
Alteration : EXTENSIVELY;
Comments : CLASTS ARE ANGULAR AND RANGE FROM A FEW MM TO 30CM
ACROSS;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <5
OLIVINE ( 1-2%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 502.97
Core: 41 Top of Core Depth (m) : 498.50
Sect: 3 Top of Section Depth(m): 501.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALTIC BRECCIA;
PILLOW;
Piece No. : PCE 1 (2-14), 2A (17-42), 2B (42-57), 2C (57-71),
3A (73-87), 3B (87-103), 3C (104-109), 3D (110-117),
3E (116-134), 4 (136-147);
Texture : PLAG OL MODERATELY PHYRIC, BRECCIA MATRIX IS DARK
GREEN SMEC BY ALTERATION OF GLASS, GNDMASS FINE-
GRAINED TO VERY FINE-GRAINED, PIECE OF PILLOW WITH
GLASS MARGIN IN PCE 3E;
Structure : VEINS AND VEINLETS FILLED WITH CALCITE + SMEC,
PYRITE IN PCE 3;
Alteration : SLIGHTLY
BRECCIA CLASTS, CLASTS ARE LITHIC BASALT AND
GLASS;
EXTENSIVELY
BRECCIA MATRIX;
Vesicles : Size(mm): Percent: <1
Location: Filling: CALCITE,SMEC
Location: Filling: QUARTZ
CALCITE-FILLED VUGS IN PCE 2A;
Phenocrysts: PLAGIOCLASE ( 5%)
Size(mm): <6
FRESH;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1480 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 504.48
Core: 41 Top of Core Depth (m) : 498.50
Sect: 4 Top of Section Depth(m): 503.00
LITHOLOGY: PLAG-OL PHYRIC BASALTIC BRECCIA;
PILLOW;
Piece No. : PCE 1A (3-12), 1B (12-21), 1C (22-29), 1D (29-43),
2A (46-57), 2B (60-73), 2C (74-81), 4A (84-95),
4B (96-105), 5A (108-117), 5B (117-124),
6 (127-140), 7A (143-144), 7B (144-145),
7C (145-146), 7D (147-148);
Texture : PLAG-OL PHYRIC, BRECCIA MATRIX CONSISTS OF DARK
GREEN SMEC BY ALTERATION OF GLASS, GNDMASS OR CLASTS
IS/ARE VERY FINE-GRAINED TO GLASSY, SHOULD SHOW
EXCELLENT QUENCH TEXTURE;
Alteration : SLIGHTLY;
FRAGMENTS ANGULAR AND UNSORTED RANGING FROM A
FEW MM TO 15CM ACROSS;
Phenocrysts: PLAGIOCLASE (10-12%)
Size(mm): <4
ONLY PARTLY ALTERED;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC;
CLINOPYROXENE ( 0%)
ESSENTIALLY NO CPX;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/ 570 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 505.07
Core: 41 Top of Core Depth (m) : 498.50
Sect: 5 Top of Section Depth(m): 504.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALTIC BRECCIA;
PILLOW;
Piece No. : PCE 1 (2-14), 2 (16-27), 3A (30-33), 3B (34-37),
3C (40-44), 4 (47-57);
Texture : PLAG-OL MODERATELY PHYRIC, PCE 1 APHYRIC, BRECCIA
FRAGMENTS ARE VARIOUS PARTS OF PILLOWS SOME WITH
GLASS RINDS, BRECCIA MATRIX OF DARK GREEN SMEC,
GLASS RINDS THROUGHOUT;
Structure : SMALL VEINLETS FILLED WITH SMEC + MINOR PYRITE;
Alteration : SLIGHTLY;
Vesicles : SPARSE IN FRAGMENTS FILLED WITH CALCITE + QUARTZ;
Phenocrysts: PLAGIOCLASE ( 5-8%)
OLIVINE ( 1%)
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
PYRITE
QUARTZ
Leg : 52 Top/Bottom Interval(mm): 0/1450 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 508.95
Core: 42 Top of Core Depth (m) : 507.50
Sect: 1 Top of Section Depth(m): 507.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALTIC BRECCIA;
PILLOW;
Piece No. : PCE 1 (3-4), 2A (7-16), 2B (17-26), 2C (25-40),
2D (40-52), 2E (47-57), 2F (57-67), 2G (67-74),
2H (73-78), 2I (77-92), 2J (92-97), 3A (100-117),
3B (114-126), 3C (126-140), 4 (143-145);
Texture : PLAG-OL MODERATELY PHYRIC, BRECCIA FRAGMENTS ARE
PARTS OF PILLOWS WITH GLASS RINDS, BRECCIA MATRIX
IS DARK GREEN SMEC AFTER GLASS, GNDMASS OF CLASTS
IS FINE TO VERY FINE-GRAINED;
FRAGMENTS RANGE FROM A FEW MM TO 10CM ACROSS;
Structure : VEINS FILLED WITH SMEC + CALCITE + PYRITE, GLASS
RINDS PRESENT, SLICKENSIDED SURFACE BETWEEN 2D AND
2E OLDER THAN A VEIN CONTAINING CALCITE ON WALL AND
QUARTZ IN CENTER;
Alteration : MOD;
Comments : PRESENCE OF UNBROKEN PILLOW (IN #2) IN THIS BRECCIA
IS STRANGE;
Phenocrysts: PLAGIOCLASE ( 5%)
OLIVINE ( 1%)
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 510.47
Core: 42 Top of Core Depth (m) : 507.50
Sect: 2 Top of Section Depth(m): 509.00
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALTIC BRECCIA;
PILLOW;
Piece No. : PCE 1 (3-11), 2 (14-25), 3A (27-40), 3B (41-46),
4 (49-64), 5 (67-71), 6 (75-84), 7 (87-93),
8 (97-100), 9A (104-112), 9B (112-124),
10A (127-135), 10B (135-142), 11 (144-147);
Texture : PLAG-OL MODERATELY PHYRIC, BRECCIA FRAGMENTS
CONSIST OF VARIOUS PILLOW PARTS SOME WITH GLASS
RINDS, GNDMASS OF CLASTS IS VERY FINE-GRAINED TO
GLASSY, PCE 4 IS A HYALOCLASTITE;
Structure : GLASS RINDS PRESENT, THICK VEINS OF CARB + QUARTZ
OCCUR IN PCES 7 AND 9A;
Alteration : MOD
FRAGMENTS ARE ANGULAR RANGING FROM A FEW MM TO
20CM ACROSS;
Phenocrysts: PLAGIOCLASE ( 8%)
Size(mm): <6
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
CLINOPYROXENE ( 0%)
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
QUARTZ
Leg : 52 Top/Bottom Interval(mm): 0/1370 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 511.87
Core: 42 Top of Core Depth (m) : 507.50
Sect: 3 Top of Section Depth(m): 510.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-15), 1B (16-23), 1C (23-32), 2 (33-38),
3 (41-54), 4 (56-63), 5A (66-73), 5B (73-82),
5C (82-86), 5D (86-93), 6 (95-100), 7 (103-108),
8A (112-114), 8B (113-115), 9 (118-124),
10 (126-137);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS FINE-GRAINED TO
GLASSY;
Structure : OCCASIONAL VEINS ARE FILLED WITH CALCITE + SMEC +
MINOR PYRITE, PCE 1 HAS INTERNAL GLASSY MARGIN
FORMED BY WATER ENTERING A FISSURE IN HOT ROCK;
Alteration : SLIGHTLY;
Comments : PCE 8A IS A POORLY SORTED LITHIC SANDSTONE WITH
CALCITE CEMENT;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): <8
SLIGHTLY ALTERED TO SMEC;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 513.47
Core: 42 Top of Core Depth (m) : 507.50
Sect: 4 Top of Section Depth(m): 512.00
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-17), 1B (18-31), 1C (32-40), 2 (43-48),
3 (52-59), 4A (62-71), 4B (72-80), 4C (81-83),
5 (87-96), 6 (100-106), 7 (109-116), 8 (119-128),
9 (131-134), 10 (138-147);
Texture : PLAG-OL PHYRIC, GNDMASS FINE-GRAINED TO GLASSY,
FRESH GLASSY MARGINS AT (3,63,105,110CM);
Structure : A 3CM THICK VEIN OF CARB + SMEC + ZEOLITE IN PCE 10;
Alteration : SLIGHTLY;
Comments : FRESH GLASS IN MANY SELVAGES;
Vesicles : Size(mm): <1 Percent: 1
Location: Filling: SMEC,CARB
Groundmass : PLAGIOCLASE
NEEDLES PROMINENT;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <8
OFTEN DISCOLORED TO BLUE-GREEN TO YELLOW;
OLIVINE ( 2%)
Size(mm): <2
ALTERED TO SMEC + CARB;
CLINOPYROXENE ( 0%)
Replacement: SMECTITE
Minerals Replaced: OL,GLASS,PLAG
CARBONATE
Minerals Replaced: OL
ZEOLITE
Leg : 52 Top/Bottom Interval(mm): 0/ 880 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 514.38
Core: 42 Top of Core Depth (m) : 507.50
Sect: 5 Top of Section Depth(m): 513.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-10), 1B (10-21), 2 (24-31), 3 (36-43),
4A (45-48), 4B (49-54), 5 (57-67), 6 (71-80),
7 (83-88);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS FINE-GRAINED TO
GLASSY;
Structure : SCATTERED VEINLETS FILLED WITH SMEC + CALCITE AND
SOME PYRITE IN PCE 6;
Alteration : SLIGHTLY;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 5-7%)
Size(mm): <10
PARTLY ALTERED TO GREEN SMEC;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC + CALCITE;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS,PLAG
CALCITE
Minerals Replaced: OL
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1450 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 517.95
Core: 43 Top of Core Depth (m) : 516.50
Sect: 1 Top of Section Depth(m): 516.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-7), 2 (10-17), 3A (22-30), 3B (31-45),
3C (46-53), 4A (57-60), 4B (61-72), 4C (73-80),
4D (81-90), 4E (92-102), 4F (103-114),
4G (115-122), 4H (123-126), 5A (129-137),
5B (137-145);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED TO GLASSY;
Structure : SCATTERED VEINLETS FILLED WITH SMEC + CARB + MINOR
PYRITE, A SMEC + CARB VEIN OR FRAGMENT OF SEDIMENT
IS ADJACENT TO GLASS SELVAGE IN PCE 4D;
Alteration : SLIGHTLY;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: CARB
Groundmass : PLAGIOCLASE
MICROLITES INDICATING FLOW STRUCTURE;
Phenocrysts: PLAGIOCLASE ( 12%)
Size(mm): <8
STAINED GREEN NEAR VEINS;
OLIVINE ( 2%)
Size(mm): <2
ALTERED TO SMEC + CARB;
CLINOPYROXENE ( <1%)
Size(mm): <2
ROUNDED, FRESH, "XENOCRYSTS";
Replacement: SMECTITE
Minerals Replaced: OL,PLAG,GLASS
CARBONATE
Minerals Replaced: OL
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1460 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 519.46
Core: 43 Top of Core Depth (m) : 516.50
Sect: 2 Top of Section Depth(m): 518.00
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-11), 2A (14-23), 2B (23-32), 3 ( 34-37),
4 (40-52), 5 (55-65), 6 (67-72), 7 (75-79),
8A (82-91), 8B (92-96), 8C (94-104), 8D (104-119),
8E (120-124), 8G (130-133), 9 (136-139),
10 (143-146);
Texture : PLAG-OL PHYRIC, BRECCIATED GLASSY MARGINS (PCE 2A-B,
3,6,7), GNDMASS FINE-GRAINED TO GLASSY;
Structure : SCATTERED VEINS FILLED WITH CARB + QUARTZ;
Alteration : SLIGHTLY
FRESH GLASS IN PCE 8G AND 9;
Comments : MINOR AMOUNTS OF ALTERED SEDIMENT OCCUR NEXT TO
GLASS SELVAGES, PCE 10 IS SMEC-CARB ROCK WITH
NODULES OF SILICON OXIDE ALTERED SEDIMENT;
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC
Phenocrysts: PLAGIOCLASE (15-18%)
Size(mm): <7
RELATIVELY FRESH;
OLIVINE ( 2%)
Size(mm): <2
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
QUARTZ
Leg : 52 Top/Bottom Interval(mm): 0/1420 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 520.92
Core: 43 Top of Core Depth (m) : 516.50
Sect: 3 Top of Section Depth(m): 519.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-11), 1B (12-18), 2A (22-30), 2B (31-40),
3A (43-57), 3B (58-66), 3C (67-73), 4 (77-84),
5 (88-98), 6 (102-110), 7A (113-125), 7B (126-133),
8 (136-142);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED TO GLASSY,
GLASSY PILLOW SELVAGES FRESH FOR MOST PART;
Structure : VEINLETS FILLED WITH SMEC + CARB;
Alteration : SLIGHTLY
MINOR BROWN STAINING ALONG VEINS, GLASS SELVAGES
MOSTLY FRESH;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: CARB
Groundmass : PLAGIOCLASE
MICROLITES;
Phenocrysts: PLAGIOCLASE ( 12%)
Size(mm): <8
OCCASIONALLY STAINED BLUE-GREEN;
OLIVINE ( 2%)
Size(mm): <2
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <2
ROUNDED, FRESH;
Replacement: SMECTITE
Minerals Replaced: OL,PLAG,GLASS
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/ 440 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 521.44
Core: 43 Top of Core Depth (m) : 516.50
Sect: 4 Top of Section Depth(m): 521.00
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-15), 2 (17-22), 3 (24-30), 4 (33-35),
5 (38-44);
Texture : PLAG-OL PHYRIC, GNDMASS FINE-GRAINED;
Structure : OCCASIONAL VEINS FILLED WITH SMEC + CALCITE
FRACTURES PRESENT;
Alteration : SLIGHTLY
MINOR STAINING ALONG FRACTURES;
Phenocrysts: PLAGIOCLASE (12-15%)
Size(mm): <7
OLIVINE ( 3%)
Size(mm): <2
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 526.97
Core: 44 Top of Core Depth (m) : 525.50
Sect: 1 Top of Section Depth(m): 525.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-7), 2 (11-15), 3 (18-21), 4 (24-26),
5A (28-37), 5B (38-50), 5C (51-60), 5D (60-62),
5E (63-72), 5F (72-84), 6A (87-106), 6B (107-114),
6C (115-123), 6D (122-130), 6E (131-136),
7 (138-147);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED TO GLASSY;
Structure : OCCASIONAL VEINS FILLED WITH SMEC + CARB;
Alteration : SLIGHTLY
GLASS FRESH, MINOR BROWN STAINING ALONG FRACTURES;
Groundmass : PLAGIOCLASE
NEEDLES;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <8
FRESH, SOMETIMES IN GLOMEROPHYRIC CLOTS WITH CPX;
OLIVINE ( 1-2%)
Size(mm): <2
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <2
ROUNDED, FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1480 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 528.48
Core: 44 Top of Core Depth (m) : 525.50
Sect: 2 Top of Section Depth(m): 527.00
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-8), 2 (11-16), 3A (19-28), 3B (29-38),
4 (42-45), 5 (48-61), 6A (63-67), 6B (68-78),
7A (82-94), 7B (95-111), 7C (112-119),
7D (115-127), 7E (124-130), 8 (134-148);
Texture : PLAG-OL-CPX MODERATELY PHYRIC BASALT, GNDMASS
FINE-GRAINED TO GLASSY;
Structure : OCCASIONAL VEINS FILLED WITH CARB + SMEC;
Alteration : SLIGHTLY;
Comments : FRESH OL GAMMA IS 1.692 (FORSTERITE 90), CPX GAMMA
IS 1.705 (DIOPSIDE 85), PLAG GAMMA IS 1.581
(ANORTHITE 83), THIS NOTED BY PV;
Vesicles : Size(mm): Percent: <1
Location: Filling: CARB,SMEC
Groundmass : PLAGIOCLASE
NEEDLES;
Phenocrysts: PLAGIOCLASE ( 8-10%)
Size(mm): <8
FRESH;
OLIVINE ( 1-2%)
Size(mm): <2
MOSTLY FRESH WITH MINOR ALTERATION TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <2
ROUNDED, FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1450 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 529.95
Core: 44 Top of Core Depth (m) : 525.50
Sect: 3 Top of Section Depth(m): 528.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-20), 2 (22-25), 3 (28-35), 4 (38-48),
5A (51-61), 5B (62-72), 5C (73-77), 6A (78-95),
6B (95-108), 6C (108-114), 6D (114-120),
7A (122-135), 7B (136-145);
Texture : PLAG-OL PHYRIC, GNDMASS FINE-GRAINED TO GLASSY, IN
(PCES 1,3,4,5C,6C,7A), GLASSY MARGINS WITH FRESH
GLASS;
Structure : OCCASIONAL VEINS FILLED WITH SMEC + CALCITE;
Alteration : SLIGHTLY;
Comments : PCE 2 IS ALTERED SEDIMENT OF CALCITE + SMEC +
QUARTZ;
Phenocrysts: PLAGIOCLASE ( 20%)
Size(mm): <10
RELATIVELY FRESH;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
QUARTZ
Leg : 52 Top/Bottom Interval(mm): 0/1430 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 531.43
Core: 44 Top of Core Depth (m) : 525.50
Sect: 4 Top of Section Depth(m): 530.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-14), 1B (15-28), 2 (31-48), 3A (52-62),
3B (64-72), 4 (74-78), 5 (82-88), 6A (91-102),
6B (103-113), 6C (114-118), 7 (122-125),
8 (128-143);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED TO GLASSY,
GLASSY SELVAGES ARE VERY FRESH;
Alteration : SLIGHTLY
GLASS IS FRESH;
Vesicles : RARE, FILLED WITH SMEC;
Groundmass : PLAGIOCLASE
NEEDLES;
Phenocrysts: PLAGIOCLASE (10-12%)
Size(mm): <8
SOMETIMES FRESH, SOMETIMES INTERGROWN WITH OL;
OLIVINE ( 2-3%)
Size(mm): <2
PARTLY ALTERED TO SMEC, SOME FRESH - GENERALLY
ROUNDED AND SMALLER THAN ALTERED EUHEDRAL XTLS;
CLINOPYROXENE ( <1%)
Size(mm): <1
ROUNDED, FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1250 Analyst:
Hole: 418A Sample Midpoint (m) : 532.75
Core: 44 Top of Core Depth (m) : 525.50
Sect: 5 Top of Section Depth(m): 531.50
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-10), 1B (10-21), 2A (23-30), 2B (31-35),
3A (37-46), 3B (47-55), 4 (57-66), 5A (67-74),
5B (74-80), 5C (82-85), 5D (85-89), 6 (91-95),
7 (98-108), 8A (110-112), 8B (111-125);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS FINE-GRAINED
TO GLASSY;
Structure : VEINS AND VEINLETS COMMON AND FILLED WITH SMEC +
CALCITE;
Alteration : SLIGHTLY
GLASS FRESH;
Comments : PCE 5A-B IS CORE CATCHER;
Vesicles : Size(mm): Percent: <1
Location: Filling: CARB,SMEC
Groundmass : PLAGIOCLASE
NEEDLES;
Phenocrysts: PLAGIOCLASE ( 9%)
Size(mm): <10
FRESH, UNEVENLY DISTRIBUTED;
OLIVINE ( 1%)
Size(mm): <1
ALTERED TO SMEC + CARB;
CLINOPYROXENE ( <1%)
Size(mm): <5
ROUNDED, FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Minerals Replaced: OL
Leg : 52 Top/Bottom Interval(mm): 0/1420 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 535.92
Core: 45 Top of Core Depth (m) : 534.50
Sect: 1 Top of Section Depth(m): 534.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-6), 2 (9-14), 3 (17-25), 4A (27-35),
4B (36-40), 5A (42-60), 5B (60-72), 5C (72-85),
5D (85-94), 6 (96-103), 7A (104-107), 7B (108-111),
8A (113-124), 8B (124-126), 9 (128-142);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS FINE-GRAINED TO
GLASSY;
Structure : VEINS ARE FILLED WITH CARB + SMEC AND MINOR PYRITE
IN PCE 5 AND 9;
Alteration : SLIGHTLY;
Vesicles : Size(mm): Percent: 0
Groundmass : PLAGIOCLASE
Size(mm): 1-2
NEEDLES;
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): <6
FRESH;
OLIVINE ( 1-2%)
Size(mm): <4
PARTLY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1410 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 537.41
Core: 45 Top of Core Depth (m) : 534.50
Sect: 2 Top of Section Depth(m): 536.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-14), 1B (15-25), 1C (25-28), 1D (28-39),
1E (39-44), 2 (46-52), 3A1 (54-56), 3A (56-60),
3B (61-65), 3C (65-70), 4A (72-74), 4B (74-78),
4C (75-78), 5 (82-91), 6 (93-100), 7 (103-116),
8 (118-127), 9 (130-135), 10 (138-141);
Texture : PLAG-OL-CPX PHYRIC, MINOR HYALOCLASTIC BRECCIA
COMPOSED OF GLASS SLIVERS IN A DARK GREEN SMEC
MATRIX, VARIOLITIC NEAR PILLOW MARGINS;
Structure : NARROW VEINLETS FILLED WITH SMEC + CALCITE + PYRITE;
Alteration : MOD;
Vesicles : Size(mm): <0.5 Percent: <1
Location: Filling: SMEC
Phenocrysts: PLAGIOCLASE (10-13%)
Size(mm): <7
FRESH;
OLIVINE ( 2-3%)
Size(mm): <2
SOME FRESH OR ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <1.5
ROUNDED, FRESH;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
Leg : 52 Top/Bottom Interval(mm): 0/1460 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 538.96
Core: 45 Top of Core Depth (m) : 534.50
Sect: 3 Top of Section Depth(m): 537.50
LITHOLOGY: APHYRIC TO PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (1-12), 1B (13-28), 1C (28-36), 2A (38-39),
2B (38-40), 3 (43-52), 4 (54-59), 5 (62-69),
6A (72-78), 6B (79-92), 6C (92-99), 7A (102-108),
7B (108-116), 7C (104-126), 7D (126-132),
7D1 (130-135), 7E (136-140), 7E1 (139-146);
Texture : APHYRIC IN PCES 6A-B AND 7B-C ARE CORES OF PILLOWS,
PLAG-OL MODERATELY PHYRIC IN OTHER ZONES, GNDMASS
FINE-GRAINED TO GLASSY;
Structure : OCCASIONAL VEINLETS FILLED WITH SMEC + CALCITE +
MINOR PYRITE;
Alteration : SLIGHTLY
GLASS FRESH;
Vesicles : Size(mm): Percent: 0
Phenocrysts: PLAGIOCLASE ( 0-10%)
Size(mm): <13
USUALLY FRESH BUT MINOR GREEN STAINING;
OLIVINE ( 1%)
Size(mm): <2
PARTLY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1480 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 540.48
Core: 45 Top of Core Depth (m) : 534.50
Sect: 4 Top of Section Depth(m): 539.00
LITHOLOGY: PLAG-OL-CPX MODERATELY TO PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-14), 1B (14-17), 1B1 (18-19), 2A (22-34),
2B (35-50), 2C (51-57), 3A1 (60-62), 3A (64-70),
3B (70-74), 3C (75-86), 4 (89-100), 5 (104-107),
6A (110-119), 6B (120-127), 6C (128-135),
6D (135-141), 7 (144-148);
Texture : PLAG-OL-CPX MODERATELY TO PHYRIC, GNDMASS FINE-
GRAINED TO GLASSY;
Structure : NUMEROUS VEINLETS FILLED WITH SMEC + CARB + MINOR
PYRITE;
Alteration : SLIGHTLY;
GLASS FRESH;
Vesicles : Size(mm): <1 Percent: <1
Location: Filling: CALCITE,SMEC
Phenocrysts: PLAGIOCLASE ( 8-14%)
Size(mm): <6
SOME PARTLY ALTERED TO SMEC;
OLIVINE ( 2%)
Size(mm): <3
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <2
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL,PLAG
CALCITE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1150 Analyst: Ricou, L.
Hole: 418A Sample Midpoint (m) : 541.65
Core: 45 Top of Core Depth (m) : 534.50
Sect: 5 Top of Section Depth(m): 540.50
LITHOLOGY: PLAG-OL MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-9), 2A (11-22), 2B (22-35), 3 (38-48),
4 (50-56), 5 (58-67), 6 (69-80), 7A (82-92),
7B (92-100), 8A (103-110), 8B (110-115);
Texture : PLAG-OL MODERATELY PHYRIC, GNDMASS FINE-GRAINED TO
GLASSY;
Structure : OCCASIONAL VEINLETS FILLED WITH SMEC + RARE PYRITE;
Alteration : SLIGHTLY
GLASS FRESH;
Vesicles : Size(mm): Percent: <1
Location: Filling: SMEC
PCE 2, IRREGULARLY DISTRIBUTED, NO ROUND VESICLES;
Phenocrysts: PLAGIOCLASE ( 7%)
Size(mm): <12
MOSTLY FRESH, SOME STAINED GREEN;
OLIVINE ( 1%)
Size(mm): <2
MOSTLY ALTERED TO SMEC, FRESH IN PCE 3;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1430 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 544.93
Core: 46 Top of Core Depth (m) : 543.50
Sect: 1 Top of Section Depth(m): 543.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-8), 1B (7-15), 1C (15-20), 2A (23-37),
2B (37-41), 2C (42-50), 2D (51-64), 3 (68-71),
4 (74-84), 5 (87-94), 6 (98-100), 7 (103-106),
8A (109-124), 8B (125-134), 8C (135-143);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED TO GLASSY;
Structure : SMALL VEINLETS COMMON AND FILLED WITH CARB + SMEC +
PYRITE;
Alteration : SLIGHTLY;
Vesicles : RARE;
Groundmass : PLAGIOCLASE
NEEDLES;
Phenocrysts: PLAGIOCLASE (10-12%)
Size(mm): <8
FRESH;
OLIVINE ( 2%)
Size(mm): <2
ONE GRAIN 8MM, PARTLY ALTERED TO SMEC BUT 50%
FRESH;
CLINOPYROXENE ( <1%)
Size(mm): <2
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1430 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 546.43
Core: 46 Top of Core Depth (m) : 543.50
Sect: 2 Top of Section Depth(m): 545.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-15), 1B (16-20), 1C (21-30), 1D (31-35),
1E (35-40), 2 (43-52), 3 (56-66), 4 (69-80),
5A (83-89), 5B (90-95), 5C (96-103), 5D (104-107),
5E (107-110), 6 (113-126), 7 (129-143);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED TO GLASSY;
Structure : SCATTERED VEINLETS FILLED WITH SMEC + CARB + MINOR
PYRITE;
Alteration : SLIGHTLY;
Vesicles : RARE;
Groundmass : PLAGIOCLASE
NEEDLES;
Phenocrysts: PLAGIOCLASE (10-12%)
Size(mm): <8
FRESH;
OLIVINE ( 2%)
Size(mm): <3
50% FRESH, SOME ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <2
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1430 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 547.93
Core: 46 Top of Core Depth (m) : 543.50
Sect: 3 Top of Section Depth(m): 546.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-12), 2 (15-26), 3 (28-55), 4 (57-62),
5 (64-67), 6A (70-82), 6B (83-90), 6C (90-98),
7A (100-103), 7B (109-113), 7C (102-112),
8A (116-125), 8B (125-133), 9 (135-143);
Texture : PLAG-OL PHYRIC, GNDMASS FINE-GRAINED TO GLASSY, IN
PCES (2,3,4,5,6A,7A,7B,8B,G) GLASSY MARGINS WITH
FRESH AND PARTLY ALTERED PALAG AND SMEC;
Structure : SCATTERED VEINLETS FILLED WITH SMEC + CALCITE +
PYRITE;
Alteration : SLIGHTLY
MINOR GREEN STAINING ALONG VEINS;
Comments : PCE 3 IS ALTERED SEDIMENT INCLUSION COMPOSED
CHIEFLY OF CALCITE + SMEC;
Groundmass : PLAGIOCLASE
FRESH MICROLITES;
CLINOPYROXENE
Phenocrysts: PLAGIOCLASE (20-25%)
Size(mm): <10
FRESH;
OLIVINE ( 3-4%)
Size(mm): <2
ALTERED TO SMEC BUT FRESH EUHEDRAL IN PCE 1-2;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
PYRITE
PALAGONITE
Leg : 52 Top/Bottom Interval(mm): 0/1420 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 549.42
Core: 46 Top of Core Depth (m) : 543.50
Sect: 4 Top of Section Depth(m): 548.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-7), 2 (10-14), 3A (16-29), 3B (29-38),
4A (41-52), 4B (52-64), 4C (65-80), 4D (80-86),
5 (88-93), 6A (97-109), 6B (110-118), 6C (118-126),
6D (126-142);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED TO GLASSY;
Structure : VEINS AND VEINLETS FILLED WITH SMEC + CALCITE;
Alteration : SLIGHTLY
PCES 1-5;
MODERATELY
PCES 5-6D, SOME FRESH GLASS PRESENT;
Comments : PCE 5 CONSISTS OF ALTERED SEDIMENT COMPOSED OF
CALCITE + SMEC;
Phenocrysts: PLAGIOCLASE (20-25%)
Size(mm): <10
FRESH;
OLIVINE ( 3%)
Size(mm): <3
PARTLY ALTERED TO SMEC BUT FRESH IN PCE 3;
CLINOPYROXENE ( <1%)
Size(mm): <3
ANHEDRAL, FRESH;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
Leg : 52 Top/Bottom Interval(mm): 0/1160 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 550.66
Core: 46 Top of Core Depth (m) : 543.50
Sect: 5 Top of Section Depth(m): 549.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-12), 2A (15-33), 2B (34-43), 2C (44-70),
2D (71-81), 3 (85-95), 4 (98-109), 5 (114-116);
Texture : PLAG-OL PHYRIC, GNDMASS FINE-GRAINED TO GLASSY, TOP
OF PCE 2A HAS A THREE-LAYERED GLASS SELVAGE
INDICATING COMPLEX COOLING HISTORY FOR THE PILLOW;
Structure : VEINLETS ARE COMMON FILLED WITH CARB + SMEC +
PYRITE;
Alteration : SLIGHTLY
GLASS FRESH;
Comments : PCES 3-5 ARE CORE CATCHER;
Groundmass : PLAGIOCLASE
NEEDLES;
Phenocrysts: PLAGIOCLASE (10-12%)
Size(mm): <8
FRESH;
OLIVINE ( 2%)
Size(mm): <4
PARTLY ALTERED TO SMEC BUT HALF FRESH;
CLINOPYROXENE ( 0%)
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1470 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 553.97
Core: 47 Top of Core Depth (m) : 552.50
Sect: 1 Top of Section Depth(m): 552.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-6), 1B (7-12), 1C (13-22), 1D (24-36),
1E (37-49), 1F (50-55), 2 (59-60), 3A (62-71),
3B (72-83), 3C (85-95), 4A (102-112), 4B (113-121),
5A (126-129), 5B (130-136), 5C (137-147);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED TO GLASSY;
Structure : SMALL VEINLETS COMMON FILLED WITH SMEC + CARB +
PYRITE;
Alteration : SLIGHTLY;
FRESH GLASS;
Groundmass : PLAGIOCLASE
NEEDLES;
Phenocrysts: PLAGIOCLASE (10-12%)
Size(mm): <8
FRESH;
OLIVINE ( 2%)
Size(mm): <3
PARTLY ALTERED TO SMEC WITH SOME FRESH;
CLINOPYROXENE ( <1%)
Size(mm): <3
ANHEDRAL, FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1480 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 555.48
Core: 47 Top of Core Depth (m) : 552.50
Sect: 2 Top of Section Depth(m): 554.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (3-15), 1B (16-44), 2A (47-57), 2B (58-62),
2C (63-70), 2D (70-80), 2E (81-85), 3 (88-90),
4A (94-104), 4B (105-115), 4C (116-123),
4D (124-127), 4E (129-135), 5 (139-143),
6 (145-148);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED TO GLASSY;
Structure : MINOR VEINLETS FILLED WITH SMEC + CARB + PYRITE;
Alteration : SLIGHTLY
GLASS VERY FRESH;
Vesicles : RARE;
Groundmass : PLAGIOCLASE
NEEDLES;
OLIVINE
EUHEDRAL;
Phenocrysts: PLAGIOCLASE (10-12%)
Size(mm): <8
FRESH;
OLIVINE ( 3%)
Size(mm): <2
MOSTLY ALTERED TO SMEC BUT SOME FRESH;
CLINOPYROXENE ( <1%)
Size(mm): <3
ROUNDED, FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CARBONATE
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1430 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 556.93
Core: 47 Top of Core Depth (m) : 552.50
Sect: 3 Top of Section Depth(m): 555.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-10), 1B (10-17), 1C (18-31), 2 (33-41),
3A (42-52), 3B (52-62), 4 (65-70), 5 (73-78),
6 (82-86), 7A (88-102), 7B (102-114), 7C (114-125),
7D (126-131), 8A (133-136), 8B (136-143);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED TO GLASSY,
IN PCES (1A,2,3A,4,6,7A,7C,7D,8B) GLASSY MARGIN WITH
FRESH OR PARTLY ALTERED GLASS;
Structure : VEINLETS COMMON FILLED WITH SMEC + CALCITE;
Alteration : SLIGHTLY
FRESH GLASS;
Comments : PCES 5-6 ARE FRAGMENTS OF ALTERED SEDIMENT
COMPOSED OF CALCITE + SMEC;
Phenocrysts: PLAGIOCLASE ( 12%)
Size(mm): <8
FRESH;
OLIVINE ( 3%)
Size(mm): <5
MOSTLY ALTERED TO SMEC BUT FRESH LOCALLY;
CLINOPYROXENE ( <1%)
FRESH, SUBOPHITIC INTERGROWTHS WITH PLAG;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
Leg : 52 Top/Bottom Interval(mm): 0/1460 Analyst: Byerly, G.
Hole: 418A Sample Midpoint (m) : 558.46
Core: 47 Top of Core Depth (m) : 552.50
Sect: 4 Top of Section Depth(m): 557.00
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-14), 2 (17-19), 3 (23-24), 4 (27-29),
5 (32-38), 6 (42-45), 7 (49-53), 8 (56-58),
9A (62-76), 9B (77-84), 10 (88-91), 11 (94-99),
12 (102-105), 13 (107-111), 14 (115-123),
15 (127-146);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED TO GLASSY;
Structure : SCATTERED VEINLETS FILLED WITH CARB + SMEC;
Alteration : SLIGHTLY
Groundmass : PLAGIOCLASE
NEEDLES;
Phenocrysts: PLAGIOCLASE ( 12%)
Size(mm): <8
FRESH;
OLIVINE ( 3%)
Size(mm): <2
ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Leg : 52 Top/Bottom Interval(mm): 0/1410 Analyst: Pertsev, N.
Hole: 418A Sample Midpoint (m) : 559.91
Core: 47 Top of Core Depth (m) : 552.50
Sect: 5 Top of Section Depth(m): 558.50
LITHOLOGY: PLAG-OL PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-16), 2A (17-29), 2B (30-39), 3 (42-48),
4A (50-62), 4B (62-74), 4C (74-87), 4D (87-91),
4E (92-104), 5 (107-117), 6A (120-134),
6B (134-141);
Texture : PLAG-OL PHYRIC, GNDMASS FINE-GRAINED TO GLASSY;
Structure : VEINLETS SCATTERED AND FILLED WITH SMEC + CALCITE;
Alteration : MODERATELY
SOME FRESH GLASS;
Phenocrysts: PLAGIOCLASE ( 15%)
Size(mm): <8
FRESH;
OLIVINE ( 4%)
Size(mm): <4
MOSTLY ALTERED TO SMEC;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CALCITE
Leg : 52 Top/Bottom Interval(mm): 0/1410 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 562.91
Core: 48 Top of Core Depth (m) : 561.50
Sect: 1 Top of Section Depth(m): 561.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-15), 1B (15-25), 1C (25-34), 1D (34-41),
2 (42-72), 3A (73-84), 3B (84-91), 3C (92-102),
3D (103-110), 4 (112-123), 5A (125-127),
5B (126-129), 5C (130-141);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED TO GLASSY,
GLASSY MARGINS;
Structure : VEINLETS SCATTERED THROUGHOUT FILLED WITH SMEC +
CALCITE + PYRITE;
Alteration : MOD
FRESH GLASS PRESENT, ALTERATION TO GREEN SMEC IN
PCES 2C-G;
Vesicles : Size(mm): <0.5 Percent: <1
Location: Filling: SMEC,CALCITE
ZEOLITE FILLED VUG IN PCES 3A-B;
Phenocrysts: PLAGIOCLASE (10-12%)
Size(mm): <7
FRESH;
OLIVINE ( 1-2%)
Size(mm): <2
PARTLY ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <1
ANHEDRAL, FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
ZEOLITE
RADIATING THOMPSONITE (?) IN VUG IN PCE 3A+3B;
Leg : 52 Top/Bottom Interval(mm): 0/1430 Analyst:
Hole: 418A Sample Midpoint (m) : 564.43
Core: 48 Top of Core Depth (m) : 561.50
Sect: 2 Top of Section Depth(m): 563.00
LITHOLOGY: PLAG-OL-CPX MODERATELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (1-15), 1B (17-30), 1C (31-42), 1D (42-50),
1E (51-65), 1E1 (59-65), 1F (66-73), 1G (72-79),
2A (81-83), 2B (83-86), 2C (88-90), 2D (89-92),
3 (96-100), 4A (103-112), 4B (113-129),
4C (130-143);
Texture : PLAG-OL-CPX MODERATELY PHYRIC, GNDMASS FINE-GRAINED
TO GLASSY, GLASSY SELVAGES IN PCES (1A,2A,2D);
Structure : VEINLETS SCATTERED THROUGHOUT FILLED WITH SMEC +
CARB + MINOR PYRITE;
Alteration : MOD
SOME FRESH GLASS;
Vesicles : RARE;
Groundmass : PYRITE
DISSEMINATED;
Phenocrysts: PLAGIOCLASE ( 9%)
Size(mm): <7
FRESH;
OLIVINE ( 1%)
Size(mm): <2
REPLACED BY SMEC + CARB;
CLINOPYROXENE ( <1%)
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Minerals Replaced: OL
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1500 Analyst:
Hole: 418A Sample Midpoint (m) : 566.00
Core: 48 Top of Core Depth (m) : 561.50
Sect: 3 Top of Section Depth(m): 564.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-12), 2A (15-30), 2B (31-43), 3A (45-62),
3B (63-74), 3C (75-86), 3D (87-90), 3E (91-100),
3F (101-111), 3G (113-127), 4A (131-138),
4B (137-145), 5A (147-150), 5B (147-149);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED TO GLASSY,
GLASSY SELVAGES IN PCES (1,2A,2B,3A,3B,4A);
Structure : VEINLETS SCATTERED THROUGHOUT FILLED WITH SMEC +
CARB + MINOR PYRITE;
Alteration : MOD
SOME FRESH GLASS;
Vesicles : RARE;
Phenocrysts: PLAGIOCLASE ( 10%)
Size(mm): <8
FRESH;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC + CARB;
CLINOPYROXENE ( <1%)
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Minerals Replaced: OL
PYRITE
Leg : 52 Top/Bottom Interval(mm): 0/1390 Analyst:
Hole: 418A Sample Midpoint (m) : 567.39
Core: 48 Top of Core Depth (m) : 561.50
Sect: 4 Top of Section Depth(m): 566.00
LITHOLOGY: PLAG-OL-CPX MODERATELY TO PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (2-6), 11 (7-11), 2A (3-7), 2B (7-8),
2C (19-21), 3 (26-36), 4 (39-50), 5A (52-55),
5B (55-57), 5C (59-62), 6 (65-75), 7A (78-79),
7 (79-89), 8 (94-98), 9A (101-111), 9B (112-126),
9C (126-139);
Texture : PLAG-OL-CPX MODERATELY PHYRIC PCES 1-8, PLAG-OL-CPX
PHYRIC PCES 9A-C, GNDMASS FINE-GRAINED TO GLASSY,
GLASSY SELVAGES IN PCES (2A,2C,4,5B,5C,6,9C);
Structure : VEINLETS SCATTERED THROUGHOUT FILLED WITH SMEC +
CARB;
Alteration : MOD;
Vesicles : RARE;
Phenocrysts: PLAGIOCLASE ( 3-12%)
Size(mm): <7
FRESH;
OLIVINE ( 1%)
Size(mm): <2
ALTERED TO SMEC + CARB;
CLINOPYROXENE ( <1%)
PRESENT ONLY IN LOWER OF SECTION;
Replacement: SMECTITE
Minerals Replaced: OL,GLASS
CARBONATE
Minerals Replaced: OL
PYRITE
LOCALLY PRESENT;
Leg : 52 Top/Bottom Interval(mm): 0/ 870 Analyst: Swanson, D.
Hole: 418A Sample Midpoint (m) : 568.37
Core: 48 Top of Core Depth (m) : 561.50
Sect: 5 Top of Section Depth(m): 567.50
LITHOLOGY: PLAG-OL-CPX PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-14), 1B (15-23), 2A (26-34), 2B (32-36),
3A (37-46), 3B (45-49), 4A (52-59), 4B (59-60),
4C (60-65), 5 (67-75), 6 (77-87);
Texture : PLAG-OL-CPX PHYRIC, GNDMASS FINE-GRAINED TO GLASSY,
FRESH GLASS IN PILLOW MARGINS OF PCES (1A,1B,2A);
Structure : NARROW VEINLETS FILLED WITH SMEC + CALCITE;
Alteration : SLIGHTLY;
Comments : PCES 4A-6 ARE CORE CATCHER;
Vesicles : Size(mm): <0.5 Percent: <1
Location: Filling: SMEC,CALCITE
Groundmass : PYRITE
Phenocrysts: PLAGIOCLASE (10-12%)
Size(mm): <8
FRESH, OFTEN IN GLOMEROCRYSTS WITH OL;
OLIVINE ( 1-2%)
Size(mm): <1
MOSTLY ALTERED TO SMEC;
CLINOPYROXENE ( <1%)
Size(mm): <1.5
FRESH;
Replacement: SMECTITE
Minerals Replaced: OL
CALCITE
PYRITE
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