Leg : 84 Top/Bottom Interval(mm): 0/1500 Analyst: Ogawa, Y.
Hole: 567A Sample Midpoint (m) : 335.50
Core: 16 Top of Core Depth (m) : 334.00
Sect: 1 Top of Section Depth(m): 334.00
LITHOLOGY: SERPENTINITE;
Piece No. : PCE NO PIECE NUMBERS ASSIGNED;
Structure : ORIGINAL CATACLASTIC STRUCTURE DEFORMED BY DRILLING,
UPWARD FLOW MADE BY CORING, SECONDARY FRACTURES
FILLED BY MINERALS, APPARENT NORMAL FAULT AT
145-148CM WITH 8MM SEPARATION MAY BE MADE BY CORING;
Alteration : EXT;
Comments : COLOR IS PALE BLUE-GREEN(5BG 7/2) MOTTLED WITH PALE
BLUE(5PB 7/2), ONLY ONE NON-BRECCIATED MOD ALTERED
SAMPLE AT 19-30CM, DRILLING DISTURBANCES, UPWARD
FLOW COMPOSED OF GREENISH BLACK BRECCIA(5G 2/1);
Leg : 84 Top/Bottom Interval(mm): 0/ 710 Analyst: Ogawa, Y.
Hole: 567A Sample Midpoint (m) : 336.21
Core: 16 Top of Core Depth (m) : 334.00
Sect: 2 Top of Section Depth(m): 335.50
LITHOLOGY: SERPENTINITE;
SAME LITHOLOGY AS CORE 16 SEC 1;
Piece No. : PCE NO PIECE NUMBERS ASSIGNED;
Structure : ORIGINAL CATACLASTIC STRUCTURE DEFORMED BY DRILLING,
UPWARD FLOW MADE BY CORING, OPEN CRACKS AT 46-51CM
AT WELL KNOWN FAULT ZONE CONTACT;
Alteration : EXT;
Comments : COLOR IS PALE BLUE SURROUNDING GREENISH BLACK
(5G 2/1) PHACOIDAL BRECCINGS OF HARDER SERP
(5-15MM LONG), DRILLING DISTURBANCES;
Leg : 84 Top/Bottom Interval(mm): 0/ 120 Analyst: Ogawa, Y.
Hole: 567A Sample Midpoint (m) : 336.33
Core: 16 Top of Core Depth (m) : 334.00
Sect: CC Top of Section Depth(m): 336.31
LITHOLOGY: SERPENTINITE;
Piece No. : PCE NO PIECE NUMBERS ASSIGNED;
Structure : BRECCIATED, VEINS, CARBONATE CRYSTAL AGGREGATES,
55-DEGREE FOLIATION MAY BE ORIGINAL ORIENTATION OF
SHEAR ZONE;
Leg : 84 Top/Bottom Interval(mm): 0/1500 Analyst: Ogawa, Y.
Hole: 567A Sample Midpoint (m) : 344.30
Core: 17 Top of Core Depth (m) : 342.80
Sect: 1 Top of Section Depth(m): 342.80
LITHOLOGY: SERPENTINITE;
SERPENTINITIC MUD;
Piece No. : PCE NO PIECE NUMBERS ASSIGNED;
Texture : SMALL PEBBLES AND BRECCIA ALONG CORE LINER AT
100-120CM, BRECCIA OF SERP AT 0-50CM, VOLCANIC GLASS
IN MUD;
Comments : COLOR IS DUSKY GREEN(5G 3/2)-DUSKY BLUE(5PB 3/2) TO
BLACK(N 5), INTERVALS 50-104CM AND 140-150CM ARE
BLACK MUD WITH PYRITE AND VOLCANIC GLASS, YELLOW
MUDSTONE PEBBLES OF DIAMETER 3MM AT 130CM BUT IT IS
NOT KNOWN IF THIS LAYER IS SEDIMENTARY, DRILLING
DISTURBANCE, SMEAR SLIDE SHOWS MUDDY MATERIALS ARE
MADE ONLY OF SERP & RELATED MINS & ARE EITHER
ROUNDED OR FLAKY, NO SEDIMENTARY FEATURES SEEN,
HIGHLY SHEARED & PULVERIZED;
Replacement: PYRITE
Leg : 84 Top/Bottom Interval(mm): 0/1400 Analyst: Ogawa, Y.
Hole: 567A Sample Midpoint (m) : 345.70
Core: 17 Top of Core Depth (m) : 342.80
Sect: 2 Top of Section Depth(m): 344.30
LITHOLOGY: SERPENTINITE;
SERPENTINITIC MUD;
Piece No. : PCE NO PIECE NUMBERS ASSIGNED;
Texture : MUD CONTAINS VOLCANIC GLASS;
Structure : WEAKLY DEVELOPED (GENTLY DIPPING) FOLIATION AT 8CM;
Comments : 0-65CM IS VERY DARK TO BLACK(N 5) MUDDY SERP,
65-140CM IS DUSKY BLUE(5PB 3/4) MUDDY SERP WITH
PHACOIDAL BRECCIA OF GREENISH BLACK(5G 2/1) HARD
SERP, ORIGINAL SHEAR ZONE EXPERIENCED DRILLING
DISTURBANCE;
Leg : 84 Top/Bottom Interval(mm): 0/ 670 Analyst: Ogawa, Y.
Hole: 567A Sample Midpoint (m) : 346.47
Core: 17 Top of Core Depth (m) : 342.80
Sect: 3 Top of Section Depth(m): 345.80
LITHOLOGY: SERPENTINITE;
SERPENTINITIC MUD;
Piece No. : PCE NO PIECE NUMBERS ASSIGNED;
Texture : FLOW STRUCTURE, SMALL WHITE BRECCIAS (5MM) OF LAYERS
OF CARB SPORADICALLY INCLUDED;
Structure : SHEARS;
Comments : DUSKY BLUE(5PB 3/2) MUDDY SERP CONTAINS DUSKY GREEN
(5G 3/2) TO DUSKY BLUE(5PB 3/2) SERP BRECCIAS
(5-20MM);
Leg : 84 Top/Bottom Interval(mm): 0/ 60 Analyst: Ogawa, Y.
Hole: 567A Sample Midpoint (m) : 346.51
Core: 17 Top of Core Depth (m) : 342.80
Sect: CC Top of Section Depth(m): 346.55
LITHOLOGY: SERPENTINITE;
SERPENTINITIC MUD;
SAME LITHOLOGY AS CORE 17 SEC 3;
Leg : 84 Top/Bottom Interval(mm): 90/ 300 Analyst: Baltuck, M.
Hole: 567A Sample Midpoint (m) : 352.00
Core: 18 Top of Core Depth (m) : 351.70
Sect: 1 Top of Section Depth(m): 351.79
LITHOLOGY: SEDIMENT (MUD);
Comments : MEDIUM DARK GRAY(N 4/5), SOUPY GRITTY MUD;
Leg : 84 Top/Bottom Interval(mm): 300/ 940 Analyst: Baltuck, M.
Hole: 567A Sample Midpoint (m) : 352.64
Core: 18 Top of Core Depth (m) : 351.70
Sect: 1 Top of Section Depth(m): 352.00
LITHOLOGY: SEDIMENT (MUDSTONE);
Texture : SERPENTINITE & MUDSTONE CLASTS;
Comments : DRILLING BRECCIA, PALE BLUE-GREEN(5BG 7/2) MUDSTONE
CLASTS, ANGULAR TO SUBROUNDED GRAYISH OLIVE-GREEN
(5GY 3/2) CLASTS, DARK GRAY(N 3) CLASTS;
Leg : 84 Top/Bottom Interval(mm): 940/1010 Analyst: Baltuck, M.
Hole: 567A Sample Midpoint (m) : 352.71
Core: 18 Top of Core Depth (m) : 351.70
Sect: 1 Top of Section Depth(m): 352.64
LITHOLOGY: SERPENTINITE;
Comments : ALTERED, PALE BLUE(5B 6/2) COLOR;
Leg : 84 Top/Bottom Interval(mm): 0/ 170 Analyst: Baltuck, M.
Hole: 567A Sample Midpoint (m) : 352.89
Core: 18 Top of Core Depth (m) : 351.70
Sect: CC Top of Section Depth(m): 352.82
LITHOLOGY: SERPENTINITE;
Piece No. : PCE NO PIECE NUMBERS ASSIGNED, INTERVALS 0-4 & 8-13;
Comments : ALTERED MARBLED LIGHT & DARK SWIRLS OF MEDIUM BLUISH
GRAY(5B 5/1) & DUSKY BLUE(5PB 4/2);
Leg : 84 Top/Bottom Interval(mm): 0/ 170 Analyst: Baltuck, M.
Hole: 567A Sample Midpoint (m) : 352.89
Core: 18 Top of Core Depth (m) : 351.70
Sect: CC Top of Section Depth(m): 352.82
LITHOLOGY: SEDIMENT (MIXED LITHOLOGIES);
NANNO OOZE;
SANDSTONE;
MUDSTONE;
Piece No. : PCE NO PIECE NUMBERS ASSIGNED, INTERVALS 4-10 &
13-17;
Texture : ANGULAR CLASTS OF MUDSTONE AND NANNO OOZE;
Comments : OLIVE GRAY MUD(5Y 3/2) AT INTERVALS 4-8 & 13-17,
OOZE IS LIGHT GRAY(N 8), SANDSTONE IS BROWNISH BLACK
(5YR 4/1), ANGULAR UNEVEN BOUNDARIES BETWEEN PCES,
DETAILED SKETCH ON SHIPBOARD FORM;
Leg : 84 Top/Bottom Interval(mm): 0/1010 Analyst: Ogawa, Y.
Hole: 567A Sample Midpoint (m) : 377.41
Core: 20 Top of Core Depth (m) : 376.40
Sect: 1 Top of Section Depth(m): 376.40
LITHOLOGY: SEDIMENT (MUDSTONE);
DOLERITE;
BASALT;
PERIDOTITE;
SERPENTINITE;
Texture : DRILLING CLASTS OF DOLERITE AND BASALT;
Comments : CONTAINS OLIVE GRAY MUD(5Y 3/2) & SERP & GRAYISH
GREEN LIMESTONE(10GY 4/4) & BLACK PERIDOTITE(N 1) &
LT GREEN MUD(5G 6/6);
Leg : 84 Top/Bottom Interval(mm): 1010/1500 Analyst: Ogawa, Y.
Hole: 567A Sample Midpoint (m) : 377.90
Core: 20 Top of Core Depth (m) : 376.40
Sect: 1 Top of Section Depth(m): 377.41
LITHOLOGY: METAGABBRO;
METABASALT;
METADOLERITE;
Piece No. : PCE 1 (102-107), 2 (108-112), 3 (113-116),
4 (118-122), 5 (124-127), 6 (129-132), 7 (134-137),
8 (139-142), 9 (143-150);
Texture : CATACLASTIC TEXTURE DEVELOPED IN PCES 1&2&4-6&9;
Structure : EPIDOTE VEIN IN PCES 2&3;
Alteration : EXT;
Comments : NO MATRIX SEEN BUT COULD BE TO BLUE-GREEN MUD OR
BASEMENT, PCE 7 IS METABASALT, PCE 8 IS METADOLERITE
OR METABASALT;
Replacement: EPIDOTE
FILLS VEINS IN PCES 2&3;
Leg : 84 Top/Bottom Interval(mm): 0/ 130 Analyst: Ogawa, Y.
Hole: 567A Sample Midpoint (m) : 394.23
Core: 21 Top of Core Depth (m) : 394.10
Sect: CC Top of Section Depth(m): 394.20
LITHOLOGY: GABBRO DRILLING CLASTS;
Leg : 84 Top/Bottom Interval(mm): 130/ 280 Analyst: Ogawa, Y.
Hole: 567A Sample Midpoint (m) : 394.38
Core: 21 Top of Core Depth (m) : 394.10
Sect: CC Top of Section Depth(m): 394.23
LITHOLOGY: METAGABBRO;
METADOLERITE;
Piece No. : PCE 1 (13-19), 2 (20-22), 3 (25-28);
Texture : CATACLASTIC TEXTURE IN PCES 1&2;
Comments : PCES 1&2 ARE METAGABBRO, PCE 3 IS METADOLERITE;
Leg : 84 Top/Bottom Interval(mm): 0/ 240 Analyst: Ogawa, Y.
Hole: 567A Sample Midpoint (m) : 403.14
Core: 22 Top of Core Depth (m) : 402.90
Sect: CC Top of Section Depth(m): 403.00
LITHOLOGY: SERPENTINITE;
Piece No. : PCE NO PIECE NUMBERS ASSIGNED;
Alteration : EXT;
Comments : COLOR IS GRAYISH BLUE(5PB 5/6), ENTIRELY CRUSHED AND
PULVERIZED TO A MUD, SERP INCLUDES SERPENTINE &
SPINEL & OP.MINS, SEVERAL PCES INCLUDED IN PLASTIC
BAG IN CORE SAMPLE (DIAMETER PCES <1.5CM);
Phenocrysts: SPINEL
Groundmass : OPAQUE MINERALS
Replacement: SERPENTINITE
Minerals Replaced: HARZBURGITE
ID UNCERTAIN OF HARZBURGITE;
Leg : 84 Top/Bottom Interval(mm): 0/ 440 Analyst: Baltuck, M.
Hole: 567A Sample Midpoint (m) : 412.24
Core: 23 Top of Core Depth (m) : 411.80
Sect: 1 Top of Section Depth(m): 411.80
LITHOLOGY: SERPENTINITIC MUD;
MICROGABBRO;
DIABASE;
Piece No. : PCE NO PIECE NUMBERS ASSIGNED;
Texture : DIABASE CLASTS IN INTERVALS 0-7 & 40-44 OF SIZE
<1CM, MICROGABBRO CLASTS IN INTERVALS 7-22 & 37-42;
Structure : VEINS FILLED BY A SOFT WHITE MINERAL IN BRECCIA;
Comments : FIRMER BRECCIA IN INTERVALS 0-22 & 37-44 (5GY 6/1),
PCES SAND-SIZED TO 4CM DIAMETER, COLOR IS BLUISH
GRAY(5B 5/1);
Replacement: PYRITE
XTLS IN BRECCIA;
Leg : 84 Top/Bottom Interval(mm): 0/ 110 Analyst: Baltuck, M.
Hole: 567A Sample Midpoint (m) : 412.32
Core: 23 Top of Core Depth (m) : 411.80
Sect: CC Top of Section Depth(m): 412.31
LITHOLOGY: SERPENTINITIC MUD;
Texture : SAND-SIZED DIABASE CLASTS OF BLACK COLOR(N 5);
Comments : COLOR OF MUD IS BLUISH GRAY(5B 6/1);
Leg : 84 Top/Bottom Interval(mm): 0/ 240 Analyst: Ogawa, Y.
Hole: 567A Sample Midpoint (m) : 429.84
Core: 25 Top of Core Depth (m) : 429.60
Sect: 1 Top of Section Depth(m): 429.60
LITHOLOGY: ALTERED GABBRO;
Piece No. : PCE 1 (4-10), 2 (12-24);
Structure : VEINS IN PCE 1 FILLED BY PALE GREENISH YELLOW MIN;
Alteration : MOD;
Comments : PCE 2 PULVERIZED BY DRILLING, PCE 1 GREENISH GRAY
COLOR(5G 5/2);
Leg : 84 Top/Bottom Interval(mm): 260/1420 Analyst: Ogawa, Y.
Hole: 567A Sample Midpoint (m) : 431.02
Core: 25 Top of Core Depth (m) : 429.60
Sect: 1 Top of Section Depth(m): 429.86
LITHOLOGY: BASALT;
Piece No. : PCE 3 (27-32), 4 (33-45), 5 (47-52), 5A (54-60),
6B (61-64), 7 (69-73), 8 (77-82), 9 (87-90),
10 (93-98), 11 (101-104), 12 (106-110),
13 (112-118), 14 (120-125), 15 (127-132),
16 (135-141);
Texture : BASALT MIXED WITH HYALOCLASTITE TO FORM LENTICULAR
AND FLOW STRUCTURE IN PCE 6A, POSSIBLE PILLOW
MARGINS;
Structure : BLACK CLASTS IN PCE 4, CALCITE VEINS THROUGHOUT,
BASALT COVERED BY FINE BASALTIC "SEDIMENTS" OF
HYALOCLASTITE, SHEARED TO FORM CM-SIZED PHACOIDAL
LENSES IN PCES 6B-16, LAYERS OF VOLCANIC "SEDIMENTS" IN PCE 4 OF BLUE & RED & GRAY COLORS, SED STRUCTURE;
Alteration : MOD
VEINS AND LAYERS;
Comments : BASALT COLOR IS VERY DUSKY RED(2.5YR 2.5/2) TO DARK
REDDISH BROWN(2.5YR 2.5/4), DETAILED SKETCH OF PCES
4 & 15 ON SHIPBOARD FORM;
Replacement: CALCITE
FILLS VEINS;
Leg : 84 Top/Bottom Interval(mm): 0/ 290 Analyst: Bourgois, J.
Hole: 567A Sample Midpoint (m) : 431.39
Core: 25 Top of Core Depth (m) : 429.60
Sect: 2 Top of Section Depth(m): 431.10
LITHOLOGY: ALTERED BASALT;
Piece No. : PCE 1 (2-11), 2 (14-19), 3 (22-29);
Texture : VERY FINE-GRAINED;
Alteration : EXT;
Comments : COLOR IS DUSKY RED(5R 3/4) TO VERY DARK RED(5R 2/6)
AND VERY DUSKY RED(10R 2/2), VEINS OF SAME MIN IN
PCES 12-14 OF SAME CORE SEC;
Leg : 84 Top/Bottom Interval(mm): 300/1500 Analyst: Bourgois, J.
Hole: 567A Sample Midpoint (m) : 432.60
Core: 25 Top of Core Depth (m) : 429.60
Sect: 2 Top of Section Depth(m): 431.40
LITHOLOGY: ALTERED BASALT;
Piece No. : PCE 4 (30-37), 5 (38-45), 6 (46-51), 7 (53-60),
8 (61-69), 9 (72-79), 10 (82-87), 11 (88-95),
11A (95-105), 12 (107-111), 12A (112-120),
13 (123-129), 13A (123-128), 14 (132-138),
15 (143-147);
Texture : VERY FINE-GRAINED;
Structure : VEINS IN PCES 12-14 FILLED WITH SAME RED MIN AS PCES
1-3 OF SAME CORE SEC, VEINS & FACIES GIVE EVIDENCE
FOR TECTONIC FRACTURES, VERY FRACTIONATED, FIRST
GENERATION NORMAL AND SECOND GENERATION REVERSE
FAULTING IN PCE 12A, CRACKS FILLED DURING SECOND
FAULTING PHASE;
Alteration : MOD;
Comments : BASALT COLOR IS GREENISH BLACK(5GY 2/1), DETAILED
SKETCH OF PCE 12A ON SHIPBOARD FORM;
Vesicles :
Location: THROUGHOUT Filling: CALCITE
Phenocrysts: OLIVINE
Size(mm): 0.5TO 2-3
ERODED;
Groundmass : PLAGIOCLASE
Leg : 84 Top/Bottom Interval(mm): 0/ 200 Analyst: Bourgois, J.
Hole: 567A Sample Midpoint (m) : 432.80
Core: 25 Top of Core Depth (m) : 429.60
Sect: 3 Top of Section Depth(m): 432.60
LITHOLOGY: ALTERED BASALT;
SAME LITHOLOGY AS CORE 25 SEC 2;
Piece No. : PCE 1 (2-8), 2 (11-19);
Comments : % LOW-TEMP METAMORPHISM;
Vesicles : VESICLES FILLED WITH A PALE BLUE-GREEN MIN
(5BG 7/2) AT 6-14CM;
Leg : 84 Top/Bottom Interval(mm): 0/ 220 Analyst: Ogawa, Y.
Hole: 567A Sample Midpoint (m) : 438.72
Core: 26 Top of Core Depth (m) : 438.50
Sect: 1 Top of Section Depth(m): 438.50
LITHOLOGY: BASALT;
Piece No. : PCE 1 (2-9), 2 (12-15), 3 (18-21);
Structure : CALCITE VEINS, PCE 1 HAS SAME CURVE AS PILLOW BASALT
& REDDISH BASALTIC "SHALE" RIM;
Alteration : EXT;
Comments : COLOR OF CORE IS DUSKY GREEN(5G 3/2), COLOR OF RIM
IS VERY DUSKY RED(10R 2/2), DETAILED SKETCH OF PCES
1&3 ON SHIPBOARD FORM;
Replacement: CALCITE
FILLS VEINS;
Leg : 84 Top/Bottom Interval(mm): 220/1150 Analyst: Ogawa, Y.
Hole: 567A Sample Midpoint (m) : 439.65
Core: 26 Top of Core Depth (m) : 438.50
Sect: 1 Top of Section Depth(m): 438.72
LITHOLOGY: GABBRO;
Piece No. : PCE 4 (24-28), 5 (30-36), 6 (38-44), 7 (46-53),
8 (57-65), 9 (68-72), 10 (75-81), 11 (83-87),
12 (90-93), 13 (96-99), 14 (101-104), 15 (106-114);
Structure : NO FOLIATION NOR DISTINCT DEFORMATION;
Comments : CONSIDERABLE METAMORPHISM, COLOR IS GREEN(10G 4/2);
Leg : 84 Top/Bottom Interval(mm): 340/1400 Analyst: Baltuck, M.
Hole: 567A Sample Midpoint (m) : 447.20
Core: 27 Top of Core Depth (m) : 445.80
Sect: 1 Top of Section Depth(m): 446.14
LITHOLOGY: MICROGABBRO;
DRILLING BRECCIA;
Piece No. : PCE NO PIECE NUMBERS ASSIGNED, INTERVALS 34-95 &
113-131;
Comments : GRADED DRILLING BRECCIA, COLOR IS OLIVE BLACK
(5Y 2/1);
Leg : 84 Top/Bottom Interval(mm): 340/1400 Analyst: Baltuck, M.
Hole: 567A Sample Midpoint (m) : 447.20
Core: 27 Top of Core Depth (m) : 445.80
Sect: 1 Top of Section Depth(m): 446.14
LITHOLOGY: METAGABBRO;
GREENSCHIST FACIES;
Piece No. : PCE 1 (98-101), 2A (105-110), 2B (107-111),
3 (133-138);
Texture : MEDIUM-GRAINED, OPHITIC;
Structure : CALCITE VEINS COMPRISE 2% OF ROCK;
Alteration : EXT;
Comments : PCES 1-2B ARE DARK-GREENISH GRAY(5GY 4/1), PCE 3 IS
GREENISH BLACK(5G 2/1);
Groundmass : PLAGIOCLASE ( 60%)
REPLACED BY ACTINOLITE & CLINOZOITE & CHLORITE;
COMBINATION ( 10%)
INCLUDES OP.MINS & CHROMITE;
COMBINATION (TO 30%)
INCLUDES CPX & AMPHIBOLITE, BROWN XTLS;
Replacement: CHLORITE
Minerals Replaced: PLAG
CLINOZOISITE
Minerals Replaced: PLAG
ACTINOLITE
Minerals Replaced: PLAG
AMPHIBOLE
CALCITE
IN VEINS;
Leg : 84 Top/Bottom Interval(mm): 1400/1500 Analyst: Baltuck, M.
Hole: 567A Sample Midpoint (m) : 447.30
Core: 27 Top of Core Depth (m) : 445.80
Sect: 1 Top of Section Depth(m): 447.20
LITHOLOGY: SERPENTINITIC MUD;
Texture : CLASTS OF METAGABBRO & SERP;
Comments : MEDIUM-BLUISH GRAY(5B 5/1);
Leg : 84 Top/Bottom Interval(mm): 0/ 170 Analyst: Bourgois, J.
Hole: 567A Sample Midpoint (m) : 447.47
Core: 27 Top of Core Depth (m) : 445.80
Sect: CC Top of Section Depth(m): 447.40
LITHOLOGY: SERPENTINITIC MUD;
Texture : NO CLASTS;
Comments : MEDIUM-BLUISH GRAY(5B 5/1);
Leg : 84 Top/Bottom Interval(mm): 440/1500 Analyst: Bourgois, J.
Hole: 567A Sample Midpoint (m) : 466.70
Core: 28 Top of Core Depth (m) : 465.20
Sect: 1 Top of Section Depth(m): 465.64
LITHOLOGY: SERPENTINIZED PERIDOTITE;
Piece No. : PCE 1 (44-53), 2 (64-67), 3 (90-97), 4 (116-123),
5A (126-132), 5 (129-133), 6 (146-158);
Structure : CONJUGATE SET OF EN ECHELON TENSION GASHES IN PCE 1;
Alteration : MOD;
Comments : COLOR IS GREENISH BLACK(5B 2/1);
Replacement: SERPENTINITE
Minerals Replaced: PERIDOTITE
Leg : 84 Top/Bottom Interval(mm): 440/1500 Analyst: Bourgois, J.
Hole: 567A Sample Midpoint (m) : 466.70
Core: 28 Top of Core Depth (m) : 465.20
Sect: 1 Top of Section Depth(m): 465.64
LITHOLOGY: SERPENTINITIC MUD;
Piece No. : PCE NO PIECE NUMBERS ASSIGNED, INTERVALS 55-62 &
70-90 & 97-115 & 136-145;
Comments : MEDIUM-BLUE COLOR(5B 5/1);
Leg : 84 Top/Bottom Interval(mm): 0/1500 Analyst: Ogawa, Y.
Hole: 567A Sample Midpoint (m) : 486.10
Core: 29 Top of Core Depth (m) : 484.60
Sect: 1 Top of Section Depth(m): 484.60
LITHOLOGY: DRILLING BRECCIA;
PERIDOTITE;
GABBRO;
DOLERITE;
BASALT;
Piece No. : PCE NO PIECE NUMBERS ASSIGNED;
Texture : BROWN CLASTS OF BASALT;
Structure : TALC VEINS;
Comments : COLOR IS DUSKY BLUE-GREEN(5BG 3/2), LARGER PCES
SEPARATED & ORIENTED IN SEC 2, BRECCIA DIAMETER
RANGES FROM 1MM TO 2CM, CONSISTS OF 71% PERIDOTITE&
14% GABBRO& 7% DOLERITE& 7% BASALT;
Replacement: COMBINATION ( 1%)
CONTAINS TALC & PECTOLITE?, WHITE MINS;
Leg : 84 Top/Bottom Interval(mm): 80/ 120 Analyst: Baltuck, M.
Hole: 567A Sample Midpoint (m) : 486.22
Core: 29 Top of Core Depth (m) : 484.60
Sect: 2 Top of Section Depth(m): 486.18
LITHOLOGY: MICROGABBRO;
Piece No. : PCE 2 (8-12);
Structure : CARB VEINS;
Groundmass : PLAGIOCLASE ( >50%)
MAY BE LABRADORITE;
PYROXENE ( 30%)
TOTAL PERCENTAGE INCLUDES REPLACEMENT MINS;
Replacement: COMBINATION ( 10%)
CONTAINS ACTINOLITE & CHLORITE;
OPAQUE MINERALS ( 5%)
MAY BE SPINEL OR CHROMITE OR MAGNETITE;
CARBONATE ( 3%)
IN VEINS;
Leg : 84 Top/Bottom Interval(mm): 30/1450 Analyst: Baltuck, M.
Hole: 567A Sample Midpoint (m) : 487.55
Core: 29 Top of Core Depth (m) : 484.60
Sect: 2 Top of Section Depth(m): 486.13
LITHOLOGY: SERPENTINITE;
Piece No. : PCE 1 (3-7), 3 (14-19), 4 (21-27), 5 (28-33),
6 (35-40), 7 (42-45), 8 (47-52), 9 (53-57),
10 (57-62), 11 (63-66), 12 (69-73), 13 (76-85),
14 (89-92), 15 (93-99), 16 (100-104), 17 (107-111),
18 (115-122), 19 (123-132), 20 (135-138),
21 (140-145);
Texture : PCES 7 & 20 ARE SERP MUD CONTAINING SERP CLASTS,
PCES 3 & 8 ARE FINE-GRAINED, PCE 10 IS FINE &
COARSE-GRAINED;
Structure : SHEARING IN PCES 1&3&10&19, VEINS OF TALC OR
CHRYSOTILE IN PCE 3, VEINS OF SERP IN PCES 1 & 4-6 &
9-11 & 21;
Alteration : MOD
PCES 1-6 & 9-19 & 21;
EXT
PCE 8;
ALMOST COMPLETELY
PCES 7&20 ARE SERPENTINITIC MUD;
Comments : PCE 3 IS DARK GREEN, PCE 7 IS DUSKY BLUE(5PB 3/2),
PCE 8 IS GRAYISH BLACK(N 2), PCE 20 IS PALE BLUE
(5PB 7/2), PCES 1 & 4-6 & 9-11 & 21 ARE BLACK(N 1);
Phenocrysts: PYROXENE
PCES 1 & 4-6 & 9-11 & 21 CONTAIN COARSE DARK GRAIN
OF PYX;
Replacement: TALC
ID UNCERTAIN, MAY BE CHRYSOTILE, IN VEINS;
Leg : 84 Top/Bottom Interval(mm): 1450/1500 Analyst: Baltuck, M.
Hole: 567A Sample Midpoint (m) : 487.60
Core: 29 Top of Core Depth (m) : 484.60
Sect: 2 Top of Section Depth(m): 487.55
LITHOLOGY: ALTERED BASALT;
Piece No. : PCE 22 (145-150);
Structure : VEINS SHOWING EXTENSION AND FILLED WITH CALCITE;
Alteration : MOD
BLACK FE-MN OXIDE;
Comments : BROWN(5YR 3/4), DETAILED SKETCH ON SHIPBOARD FORM;
Vesicles :
Location: Filling: SERP
Replacement: CALCITE
IN VEINS;
FERROUS MN OXIDE
SERPENTINITE
IN VESICLES;
Leg : 84 Top/Bottom Interval(mm): 0/ 330 Analyst: Baltuck, M.
Hole: 567A Sample Midpoint (m) : 487.93
Core: 29 Top of Core Depth (m) : 484.60
Sect: CC Top of Section Depth(m): 487.70
LITHOLOGY: DRILL BRECCIA;
SERPENTINITE;
GABBRO;
ALTERED BASALT;
Piece No. : PCE NO PIECE NUMBERS ASSIGNED;
Texture : SERP-GABBRO-ALTERED BASALT CLASTS;
Alteration : MOD;
Comments : GRAIN SIZE 0.5-3CM;
|
