Leg : 60 Top/Bottom Interval(mm): 0/1500 Analyst: Natland, J.
Hole: 456 Sample Midpoint (m) : 135.00
Core: 16 Top of Core Depth (m) : 133.50
Sect: 1 Top of Section Depth(m): 133.50
LITHOLOGY: APHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-5), 2 (8-13), 3 (16-18), 4 (21-28),
5 (32-35), 6 (38-39), 7A (41-47), 7B (47-55),
7C (55-61), 7D (62-66), 7E (67-72), 8 (75-77),
9 (80-82), 10A (85-91), 10B (91-96), 10C (96-98),
10D (101-103), 10E (104-114), 11 (116-119),
12 (121-124), 13 (126-129), 14 (132-135),
15 (138-144), 16 (147-150);
Texture : APHYRIC, EXTENSIVELY HYDROTHERMALLY ALTERED PILLOW
BASALTS WITH INCLUSIONS OR INTERBEDS OF ALTERED
SEDIMENTS INCLUDING LIMESTONES;
Structure : MORE ALTERED ZONES ARE TYPICALLY NEAR PILLOW MARGINS
AND THERE ARE PILLOW RINDS PRESENT IN TOP OF PCE 4
AND 10A AND NEAR THE BOTTOM OF PCES 7E AND 8, CRACKS
IN PCES 7B AND 10C ARE FILLED WITH DARK BROWNISH
GREY MATERIAL, VEIN IN PCE 7B FILLED WITH FE-MN.OX;
Alteration : EXT
PCES 2-3 AND 7A-B AND 7D-10C AND 11-16;
MOD
REST OF SECTION, EXTENSIVELY HYDROTHERMALLY
ALTERED, IN PCES 12 AND 15-16 FRAGMENTED GLASS HAS
CONCENTRIC ALTERATION RINDS WITH GREEN OUTSIDE AND
PALE GREEN INSIDE;
Comments : DARK GREENISH GREY (5G4/1) ALTERED BASALTS WITH MORE
EXTENSIVELY ALTERED GREENISH GREY (5G6/1) OR LIGHT
BLUISH-GREENISH GREY (5GB6.5/1) FRAGMENTS OR ZONES,
NEAR MARGINS OF PILLOWS DARKER GREEN ALTERED
SPHERULITIC ZONES OCCUR NEXT TO GREYISH BLUE GREEN
(5BG5/2) ALTERED FRAGMENTED FORMER GLASS, PCE 10B
HAS NO ORIENTATION, PCE 1 IS A BOTTLE FILLED WITH
SOFT BROWNISH GREY (5YR4/1) MUD SCRAPED FROM TOP OF
PCE 2, PCE 2 IS LIGHT BROWNISH GREY (10YR6/2)
FORAM(?) LIMESTONE WITH LITTLE HOLES LINED WITH
LIGHT GREENISH GREY CLAYS, PCE 3 IS REXTLZED POROUS
LIMESTONE, PCES 7A-B HAVE INCORPORATED LIMESTONE,
PCE 9 IS A CHERT;
Vesicles : THE PALER ALTERED ZONES IN THE BASALTS ARE RICH
IN CALCITE IN THE VESICLES;
Replacement: CALCITE
CLAY MINERALS
FERROUS OXIDE
MANGANESE OXIDE
BOTH OXIDE MINERALS PRESENT IN REDDISH AND BLACK
FORMS IN VEIN IN PCE 7B;
PYRITE
AS FLECKS IN DARK GREEN ZONES;
Leg : 60 Top/Bottom Interval(mm): 0/1420 Analyst: Natland, J.
Hole: 456 Sample Midpoint (m) : 136.42
Core: 16 Top of Core Depth (m) : 133.50
Sect: 2 Top of Section Depth(m): 135.00
LITHOLOGY: APHYRIC BASALT;
PILLOW;
Piece No. : PCE 1A (2-13), 1B (13-19), 2 (22-30), 4 (41-43),
5 (46-49), 6 (52-59), 7 (62-66), 8 (68-75),
9 (78-82), 10A (85-90), 10B (91-96), 10C (96-107),
11 (110-114), 12 (116-118), 13 (120-123),
14 (125-129), 15 (132-137), 16 (140-142);
Texture : APHYRIC, EXTENSIVELY HYDROTHERMALLY ALTERED PILLOW
BASALTS, MINERALOGICALLY AND TEXTURALLY SIMILAR TO
PREVIOUS SECTION, TOP OF PCE 1 HAS AN ALTERED GLASS
RIND;
Structure : PILLOW MARGINS PRESENT, CRACKS ARE FILLED WITH CARB,
NO DARK CRACK FILLINGS LIKE SECTION 1, PCE 15 HAS
FRACTURE SURFACE WITH FE.OXIDE PRESENT;
Alteration : MOD
PCES 2 AND 10B-15;
EXT
REST OF SECTION, EXTENSIVE ALTERATION FROM
HYDROTHERMAL ACTIVITY;
Comments : NO LIMESTONE PRESENT AS IN PREVIOUS SECTION, PEBBLES
MAKE UP PCES 6 AND 8;
Vesicles : PCES 12-15 ARE MORE VESICULAR THAN 1-11, VESICLES
IN PCE 15 ARE NOT ALL FILLED WITH CARB--ONLY MINOR
CLAY.MIN IN MANY, VUGS ARE FILLED WITH CALCITE;
Replacement: CALCITE
CLAY MINERALS
FERROUS OXIDE
PYRITE
DARK GREEN ZONES FLECKED WITH PYRITE;
Leg : 60 Top/Bottom Interval(mm): 0/ 990 Analyst: Natland, J.
Hole: 456 Sample Midpoint (m) : 143.99
Core: 17 Top of Core Depth (m) : 143.00
Sect: 1 Top of Section Depth(m): 143.00
LITHOLOGY: APHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (3-6), 2 (8-12), 3 (14-18), 4 (20-23),
5 (26-28), 6 (31-32), 7 (34-37), 8 (40-43),
9 (46-51), 10 (55-57), 11 (60-67), 12 (70-75),
13 (78-81), 14 (84-92), 15 (95-99);
Texture : APHYRIC, HYDROTHERMALLY ALTERED PILLOW BASALTS AND
MINOR FE-MN HYDROGENOUS SEDIMENTS, FINE GRAINED,
PCES 1+9+12 HAVE DARK GREY GREEN ALTERED GLASSY
RINDS, EXTENSIVE BLEACHED ZONES NEXT TO RINDS IN
THIS CORE ABSENT (UNLIKE CORE 16), NO ORIENTED
SAMPLES;
Structure : PCE 9 IS A TRIANGULAR SHAPED PILLOW FRAGMENT
SURROUNDED BY ALTERED GLASSY BRECCIA AND RIDDLED
WITH BLACK MN MATERIAL ON ONE SIDE;
Alteration : EXT
PCES 1-2+11;
MOD
REST OF SECTION, EXTENSIVE ALTERATION FROM
HYDROTHERMAL ACTIVITY;
Comments : BASALT IS DARK GREENISH GREY (5G4/1), PCE 14
CONSISTS OF TWO TYPES OF CLAY RICH SEDIMENTS STUCK
TOGETHER WITH ONE BEING DARK GREY AND HARD AND THE
OTHER BEING SOFTER AND REDDER, IT IS POSSIBLE THAT
THESE WERE HYDROGENOUS DEPOSITS THAT WERE LATER
ALTERED, SOME SECTIONS ARE AN OLIVE COLOR (5Y4/3);
Vesicles : CARB IS A MINOR FILLER IN THE VESICLES IN THIS
CORE;
Replacement: CARBONATE
FERROUS OXIDE
MANGANESE OXIDE
Leg : 60 Top/Bottom Interval(mm): 0/ 910 Analyst: Natland, J.
Hole: 456 Sample Midpoint (m) : 153.41
Core: 18 Top of Core Depth (m) : 152.50
Sect: 1 Top of Section Depth(m): 152.50
LITHOLOGY: APHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (4-12), 2 (15-19), 3 (24-32), 4 (36-42),
5 (45-55), 6 (58-65), 7 (68-74), 8 (76-84),
9 (87-91);
Texture : APHYRIC, PCES 3+5-6 ARE COARSER GRAINED THAN 1-2,
FROM PCE 7 DOWNWARD GRAIN SIZE IS FINER AND ABOUT
THE SAME AS PCES 2-3, PCE 2 HAS SUB-SPHERULITIC
PLAG, PCE 5 IS MICROLITIC, MOST VERY FINE GRAINED;
Structure : THIS SEQUENCE POSSIBLY REPRESENTING MOST OF ONE
LARGE ALTERED PILLOW;
Alteration : EXT
EXTENSIVE WHERE OXIDIZING CONDITIONS PRESENT;
Comments : PCES 1-2 ARE GREYISH BROWN (2.5Y5/2) TO LIGHT OLIVE
BROWN (2.5Y5/4), PCES 3-9 ARE DARKER OLIVE GREY
(5Y5/2) AND TINTED A LOT BROWNER, ORANGE FE.HYDRX
MATERIAL ON EXTERIOR SURFACES OF PCES 3+5, REDDER
MATERIAL ON PCE 6 ALONG WITH MN.OXIDE AND CALCITE,
PEBBLES MAKE UP PCES 4+8;
Vesicles : PCE 3 IS VESICULAR, PCES 5-6 HAVE ONLY A FEW TINY
VESICLES, MINOR CARB IS IN VESICLES OF PCE 3;
Replacement: CALCITE
FERROUS HYDROX MINS
MANGANESE OXIDE
Leg : 60 Top/Bottom Interval(mm): 0/ 720 Analyst: Natland, J.
Hole: 456 Sample Midpoint (m) : 162.22
Core: 19 Top of Core Depth (m) : 161.50
Sect: 1 Top of Section Depth(m): 161.50
LITHOLOGY: APHYRIC TO PLAG SPARSELY PHYRIC BASALT;
PILLOW;
Piece No. : PCE 1 (4-6), 2 (9-17), 3 (20-23), 4 (27-30),
5 (32-39), 6 (42-45), 7 (48-50), 8 (51-56),
9 (58-60), 10 (63-66), 11 (69-72);
Texture : APHYRIC TO PLAG SPARSELY PHYRIC, PCES 1+2+4+5+9+10
ARE VERY FINE GRAINED, ALL OTHER PCES ARE MICROLITIC
AND PCE 11 HAS FRESH GLASS;
Structure : MINOR FE.HYDRX APPEARS ON FRACTURE SURFACES, THERE
ARE A MINIMUM OF TWO COOLING UNITS REPRESENTED, PCES
2+6-8 COULD BE COARSER INTERIORS OF THESE COOLING
UNITS;
Alteration : SLIGHTLY
ALL BUT PCES 1+3 HAVE BROWN OXIDIZED APPEARANCES;
Comments : A THIN ORANGE STREAK APPEARS ON THE SIDE OF PCE 5;
Vesicles : Size(mm): 1-2 Percent: <5
PCES 1-3+10, NO CALCITE IN VESICLES OR VUGS;
Phenocrysts: PCES 2+4+5+7+8 HAVE RARE PLAG PHENOS AND
GLOMEROCRYSTS;
Replacement: FERROUS HYDROX MINS
PALAGONITE
Minerals Replaced: GLASS
PCE 11;
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