Leg : 64 Top/Bottom Interval(mm): 50/ 100 Analyst: Saunders, A. Hole: 477 Sample Midpoint (m) : 58.13 Core: 8 Top of Core Depth (m) : 58.00 Sect: CC Top of Section Depth(m): 58.08 LITHOLOGY: PLAG PHYRIC BASALT; DOLERITE; Piece No. : PCE 1 (6-10); Texture : SOFT,COARSE-GRAINED; Alteration : EXTENSIVELY ALTERATION INDICATES ROCK MAY BE MORE DOLERITIC THAN BASALTIC; Comments : DARK GRAY(N3-N4),SEA WATER-PERMEATED,VAGUE GREENISH TINT; Phenocrysts: PLAGIOCLASE ( 20%) Size(mm): 0.5-3 Replacement: CLAY MINERALS INDICATED BY GREENISH TINT; Leg : 64 Top/Bottom Interval(mm): 0/ 150 Analyst: Saunders, A. Hole: 477 Sample Midpoint (m) : 60.15 Core: 9 Top of Core Depth (m) : 60.00 Sect: 1 Top of Section Depth(m): 60.00 LITHOLOGY: PLAG PHYRIC DOLERITE; Piece No. : PCES 1 (2-4), 2 (6-8), 3 (11-14); Texture : MEDIUM-TO-COARSE-GRAINED,DOLERITIC,PHYRIC,SIMILAR TO CORE 8-CC; Alteration : EXTENSIVELY PERMEATED BY WATER,20% OF ROCK CONSISTS OF GREEN & VERY SOFT CLAY.MIN(OR ZEOL) LEADING TO LOSS OF INTEGRITY; INDIVIDUAL MINERAL GRAINS VERY FRESH,PYX FAIRLY FRESH; Comments : FRIABLE,DARK GRAY MATRIX,HOLE TEMPERATURE ESTIMATED AT 80 DEGREES CELSIUS; Phenocrysts: PLAGIOCLASE (TO 15%) Size(mm): 0.5-4 PYROXENE Groundmass : FELDSPAR OLIVINE ID OL UNCERTAIN,MATRIX IS DARK GRAY; Replacement: CLAY MINERALS ( 20%) GREEN,VERY SOFT; ZEOLITE Leg : 64 Top/Bottom Interval(mm): 150/ 600 Analyst: Saunders, A. Hole: 477 Sample Midpoint (m) : 60.60 Core: 9 Top of Core Depth (m) : 60.00 Sect: 1 Top of Section Depth(m): 60.15 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 4 (16-18), 5 (22-28), 6 (29-33), 7 (35-40), 8 (43-47), 9 (48-52), 10 (55-59); Texture : MEDIUM-GRAINED APHYRIC; Alteration : EXTENSIVELY WATER-PERMEATED,SHOT THROUGH WITH VERY SOFT CLAY (OR ZEOL) RESULTING IN LOSS OF INTEGRITY, INDIVIDUAL MINERAL GRAINS VERY FRESH,PYX FAIRLY FRESH AND OL VERY FRESH INDICATE LOW GRADE ALTERATION; Comments : DARK GRAY BASALT,FRIABLE,HOLE TEMPERATURE AT DEPTH ESTIMATED TO BE 80 DEGREES CELSIUS; Vesicles : Size(mm): TO 1 Percent: 4 Location: Filling: ZEOL ID VESICLES UNCERTAIN,IRREGULAR CAVITIES,ID ZEOL UNCERTAIN(NATROLITE?),PCES 9+10; Groundmass : FELDSPAR PYROXENE FAIRLY FRESH; OLIVINE VERY FRESH,ID OL UNCERTAIN; Replacement: CLAY MINERALS GREEN,VERY SOFT; ZEOLITE ID ZEOL UNCERTAIN(POSSIBLY NATROLITE); Leg : 64 Top/Bottom Interval(mm): 0/ 150 Analyst: Saunders, A. Hole: 477 Sample Midpoint (m) : 67.65 Core: 10 Top of Core Depth (m) : 67.50 Sect: 1 Top of Section Depth(m): 67.50 LITHOLOGY: DOLERITE; Piece No. : PCES 1 (0-3), 2 (4-7), 3 (9-13); Texture : MEDIUM-GRAINED,APHYRIC,SIMILAR TO CORE 9-1,PCE 3 MAY REPRESENT A CHILL ZONE; Alteration : EXTENSIVELY CONSTITUENT MINERALS(OL?,PYX,FELD) APPEAR FRESH; Comments : DARK GREENISH-GRAY BASALT(5G2/1),WATER-PERMEATED, FRIABLE; Vesicles : Location: Filling: ZEOL PCE 3; Groundmass : OLIVINE ID OL UNCERTAIN; PYROXENE FELDSPAR Replacement: ZEOLITE Leg : 64 Top/Bottom Interval(mm): 150/ 900 Analyst: Saunders, A. Hole: 477 Sample Midpoint (m) : 68.40 Core: 10 Top of Core Depth (m) : 67.50 Sect: 1 Top of Section Depth(m): 67.65 LITHOLOGY: FELDSPAR PHYRIC DOLERITE; Piece No. : PCES 4 (16-22), 5 (23-27), 6 (30-34), 7 (37-42), 8 (43-53), 9 (55-59), 10 (61-67), 11 (69-72), 12 (74-76), 13 (78-80), 14 (82-85), 15 (86-90); Texture : PHYRIC,COARSE-GRAINED,GRAINSIZE RANGES 0.5-5MM; Alteration : EXTENSIVELY INDICATED BY FRIABLE NATURE & PRESENCE OF CLAY.MIN ALTHOUGH CONSTITUENT MINERALS NOT VISIBLY ALTERED; Comments : DARK GREENISH-GRAY(5G2/1),FRIABLE; Vesicles : Location: Filling: ZEOL CAVITIES,ID VESICLES UNCERTAIN; Phenocrysts: FELDSPAR Size(mm): TO 10 Groundmass : FELDSPAR Size(mm): 5 PYROXENE OLIVINE Size(mm): 0.5 ID OL UNCERTAIN; Replacement: CLAY (10-20%) ZEOLITE Leg : 64 Top/Bottom Interval(mm): 0/1450 Analyst: Saunders, A. Hole: 477 Sample Midpoint (m) : 78.45 Core: 11 Top of Core Depth (m) : 77.00 Sect: 1 Top of Section Depth(m): 77.00 LITHOLOGY: COARSE DOLERITE OR GABBRO; Piece No. : PCES 1 (0-4), 2 (5-10), 3 (12-17), 4 (18-25), 5 (25-29), 6 (30-35), 7 (36-39), 8 (41-44), 9 (46-50), 10 (52-55), 11 (58-61), 12 (62-66), 13 (67-74), 14 (75-80), 15A (81-86), 15B (87-100), 15C (99-106), 16 (109-119), 17 (120-128), 18A (130-136), 18B (135-142); Texture : COARSE-GRAINED DOLERITE OR MEDIUM-GRAINED GABBRO,TOP OF CORE SIMILAR TO CORE 10-1,PCES 4-15C MEDIUM- GRAINED DOLERITE & PHYRIC,BECOMES COARSER-GRAINED AFTER PCE 9,PCES 10-18B COARSE GABBRO WITH GRAINSIZE GENERALLY 1-6MM; Alteration : EXTENSIVELY LIGHT GREEN CLAY.MIN(20-30%) IN MINERAL INTERSTICES, OL & PYX & PLAG ARE FRESH; Comments : DARK GREENISH-GRAY,WATER-PERMEATED; Phenocrysts: PLAGIOCLASE ( 15%) Size(mm): 3-6 OCCASIONALLY IN PCES 10-18B,ALL PLAG FRESH; OLIVINE Size(mm): 1-6 PYROXENE Size(mm): 1-6 PYX & OL FRESH; Replacement: CLAY (20-30%) INTERSTICES; Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Fornari, D. Hole: 477 Sample Midpoint (m) : 80.00 Core: 11 Top of Core Depth (m) : 77.00 Sect: 2 Top of Section Depth(m): 78.50 LITHOLOGY: GABBRO; Piece No. : PCES 1A (0-10), 1B (10-17), 2 (19-27), 3A (29-40), 3B (40-48), 4 (50-57), 5A (60-75), 5B (76-85), 6 (87-93), 7 (95-100), 8 (101-113), 9 (115-121), 10 (122-128), 11 (130-134), 12A (136-138), 12B (138-150); Texture : COARSE-GRAINED EQUIGRANULAR; Alteration : EXTENSIVELY 20% OF ROCK CONSISTS OF CLAY.MIN,MAJOR PHENO MINERALS SEPARATED ALONG GRAIN BOUNDARIES, ALL PYX & FELD ARE VERY FRESH AND HAVE NOT BEEN ALTERED; Vesicles : VUGS FILLED WITH ZEOL & TURQUOISE-BLUE CLAY.MIN, ACICULAR; Phenocrysts: PYROXENE Size(mm): 2-5 EUHEDRAL,FRESH; PLAGIOCLASE Size(mm): 2-5 EUHEDRAL,FRESH; OLIVINE Size(mm): 1-2 PALE YELLOW,MINOR PHENOS; MAJOR PHENO MINERALS SEPARATED ALONG GRAIN BOUNDARIES; Replacement: CLAY MINERALS TURQUOISE-BLUE IN VUGS,20% OF ROCK CLAY.MIN; ZEOLITE Leg : 64 Top/Bottom Interval(mm): 0/1460 Analyst: Saunders, A. Hole: 477 Sample Midpoint (m) : 87.96 Core: 12 Top of Core Depth (m) : 86.50 Sect: 1 Top of Section Depth(m): 86.50 LITHOLOGY: GABBRO; Piece No. : PCES 1A (1-12), 1B (12-23), 1C (23-29), 2 (30-36), 3 (37-50), 4 (52-63), 5A (65-67), 5B (67-73), 6A (75-79), 6B (78-88), 6C (99-105), 7 (106-114), 8 (115-130), 9 (132-136), 10 (137-146); Texture : MEDIUM-GRAINED EQUIGRANULAR,SPARSELY PHYRIC WITH GRAINS BETWEEN 1 & 6MM COMPRISING FRESH XTLS OF PLAG & PYX & OL,VERY SIMILAR TO CORE 11-2; Alteration : EXTENSIVELY 20% OF ROCK CLAY.MIN; Comments : DARK GREEN-GRAY GABBRO,LESS FRIABLE THAN IN PREVIOUS CORES; Phenocrysts: PLAGIOCLASE OCCASIONAL; Groundmass : PLAGIOCLASE Size(mm): 1-6 PYROXENE Size(mm): 1-6 OLIVINE Size(mm): 1-6 Replacement: CLAY MINERALS ( 20%) INTERSTITIAL TO GRAINS IN GNDMASS,LIGHT GREEN; Leg : 64 Top/Bottom Interval(mm): 0/1350 Analyst: Saunders, A. Hole: 477 Sample Midpoint (m) : 89.35 Core: 12 Top of Core Depth (m) : 86.50 Sect: 2 Top of Section Depth(m): 88.00 LITHOLOGY: GABBRO; COARSE DOLERITE; Piece No. : PCES 1 (1-20), 2 (22-34), 3A (35-47), 3B (47-58), 3C (58-71), 3D (71-79), 4A (80-90), 4B (90-96), 4C (96-114), 4D (113-135); Texture : MEDIUM-GRAINED INEQUIGRANULAR TO PHYRIC GABBRO OR DOLERITE,PCES IN UPPER HALF OF THE CORE TEND TO HAVE COARSE TEXTURE(SIMILAR TO CORE 12-1) WHICH GRADE SLIGHTLY TO A MEDIUM-GRAINED DOLERITE TEXTURE IN THE LOWER HALF OF THE CORE(MAIN TRANSITION OCCURS IN CORES 12-3 & 12-4); Structure : PALE GREEN CLAY.MIN FACE THE JOINT SURFACES ON SEVERAL PCES; Alteration : EXTENSIVELY 20% PALE GREEN CLAY.MIN & ZEOL,MINERAL GRAINS NOT ALTERED; Comments : DARK GREEN-GRAY BASALT; Groundmass : PLAGIOCLASE ( 10%) Size(mm): TO 6 PROMINENT XTLS; Replacement: CLAY MINERALS ( FACE%) Size(mm): JOINT SUR Minerals Replaced: FACES ON SEVERAL PCES,PALE (AY.MI%) Size(mm): N & ZEOL M Minerals Replaced: AKE UP 20% OF ROCK; ZEOLITE Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Fornari, D. Hole: 477 Sample Midpoint (m) : 91.00 Core: 12 Top of Core Depth (m) : 86.50 Sect: 3 Top of Section Depth(m): 89.50 LITHOLOGY: GABBRO TRANSITIONAL TO PLAG PHYRIC DOLERITE; Piece No. : PCES 1 (0-8), 2 (10-15), 3A (17-28), 3B (29-31), 3C (33-45), 3D (45-49), 3E (50-56), 3F (56-62), 3G (63-68), 3H (68-73), 3I (74-78), 3J (79-86), 3K (87-92), 3L (92-108), 3M (99-105), 3N (106-111), 3O (112-116), 3P (117-122), 3Q (123-128), 3R (129-138), 3S (139-149); Texture : MEDIUM-GRAINED SIMILAR TO CORES 12-1 & 12-2 WITH SUBTLE TRANSITION DISCERNABLE FROM CORE 12-2 THROUGH CORE 12-3,FINE-GRAINED AT THE BASE TO THE POINT WHERE IT GRADES INTO A DOLERITIC TEXTURE; Alteration : EXTENSIVELY ALTERATION RESTRICTED TO INTERGRANULAR SURFACES OF PHENOS; Phenocrysts: PLAGIOCLASE PYROXENE PLAG & PYX ARE OF EQUAL SIZE BUT PLAG IS 1.5X MORE ABUNDANT THAN PYX; OLIVINE ALL PHENOS FRESH; Replacement: CLAY BLUISH-GREEN; ZEOLITE FIBROUS,ACICULAR; Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 477 Sample Midpoint (m) : 92.50 Core: 12 Top of Core Depth (m) : 86.50 Sect: 4 Top of Section Depth(m): 91.00 LITHOLOGY: PLAG PHYRIC DOLERITE; Piece No. : PCES 1A (0-9), 1B (9-17), 1C (17-25), 1D (25-31), 1E (31-80), 1F (79-119), 1G (120-123), 1H (123-128), 1I (129-136), 1J (136-141), 1K (145-148); Texture : MEDIUM-TO-FINE-GRAINED DOLERITE,BASE OF CORE TENDS TO BASALTIC TEXTURE; Structure : CLAY.MIN COATINGS ON SEVERAL PCES INDICATE SMALL SCALE VEINING; Alteration : EXTENSIVELY ALTHOUGH SEVERELY ALTERED THERE IS LESS CLAY.MIN PRESENT(NOW 10%) THAN IN CORE 12-3; Comments : DARK GRAY; Vesicles : Size(mm): Percent: 0 Phenocrysts: PLAGIOCLASE ( 10%) Size(mm): 1-5 Groundmass : PLAGIOCLASE CLINOPYROXENE OLIVINE MINERAL GRAINS UNALTERED; CLAY MINERALS ( 10%) Replacement: CLAY MINERALS Leg : 64 Top/Bottom Interval(mm): 0/ 550 Analyst: Saunders, A. Hole: 477 Sample Midpoint (m) : 93.05 Core: 12 Top of Core Depth (m) : 86.50 Sect: 5 Top of Section Depth(m): 92.50 LITHOLOGY: PLAG PHYRIC DOLERITE OR BASALT; Piece No. : PCES 1A (0-12), 1B (12-15), 1C (15-18), 1D (18-24), 1E (18-24), 1F (25-29), 1G (30-42), 1H (42-51); Texture : FINE-GRAINED(<0.5MM GRAINSIZE),PHYRIC; Structure : VEINING IN PCES 1A-1D; Alteration : MOD NO DEVELOPMENT OF CLAY.MIN AS IN CORE 12-4; Comments : DARK GRAY; Vesicles : Location: 0 Filling: Phenocrysts: PLAGIOCLASE ( 10%) Size(mm): TO 6 LATHS,IRREGULAR TABLOID; Leg : 64 Top/Bottom Interval(mm): 0/1400 Analyst: Fornari, D. Hole: 477 Sample Midpoint (m) : 97.40 Core: 13 Top of Core Depth (m) : 96.00 Sect: 1 Top of Section Depth(m): 96.00 LITHOLOGY: PLAG PHYRIC DOLERITE; Piece No. : PCES 1 (0-1), 2A (3-10), 2B (10-18), 2C (18-21), 2D (22-30), 2E (29-36), 3A (38-47), 3B (47-55), 3C (55-65), 3D (63-70), 3E (71-73), 4A (76-78), 4B (78-96), 4C (95-106), 4D (105-113), 4E (111-121), 4F (120-130), 4G (130-138); Texture : PHYRIC; Structure : NO FRACTURES OR VEINS; Alteration : FRESH Comments : MEDIUM-LIGHT GRAY; Phenocrysts: PLAGIOCLASE Size(mm): 1-4 Groundmass : PYROXENE OPAQUE MINERAL OLIVINE Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Fornari, D. Hole: 477 Sample Midpoint (m) : 99.00 Core: 13 Top of Core Depth (m) : 96.00 Sect: 2 Top of Section Depth(m): 97.50 LITHOLOGY: PLAG PHYRIC DOLERITE; Piece No. : PCES 1 (2-4), 2 (8-10), 3 (12-20), 4A (23-25), 4B (26-29), 5A (31-40), 5B (40-45), 6A (47-56), 6B (55-65), 6C (65-87), 6D (87-120), 6E (120-127), 7 (129-130), 8 (132-150); Texture : SIMILAR IN ALL RESPECTS TO CORE 13-1; Structure : NO FRACTURING OR VEINING; Alteration : FRESH Comments : MEDIUM-LIGHT GRAY; Phenocrysts: PLAGIOCLASE Groundmass : PLAGIOCLASE FINE PLAG LATHS; OLIVINE OPAQUE MINERAL PYROXENE Leg : 64 Top/Bottom Interval(mm): 0/ 90 Analyst: Fornari, D. Hole: 477 Sample Midpoint (m) : 101.59 Core: 14 Top of Core Depth (m) : 101.50 Sect: CC Top of Section Depth(m): 101.60 LITHOLOGY: PLAG PHYRIC DOLERITE; Piece No. : PCE 1 (0-9); Texture : SIMILAR IN ALL RESPECTS TO CORES 13-1 & 13-2; Comments : THIS PCE WAS FOUND JAMMED IN THE CORE CATCHER & CONSEQUENTLY THE CONTACT BETWEEN THE DOLERITE SILL ABOVE & THE CLAYSTONE BELOW(RECOVERED IN CORE 15) WAS NOT RECOVERED BUT IS INFERRED TO BE LOCATED WITHIN THE DRILLED INTERVAL 101.5-105.5M SUBBOTTOM; |
Cite as: Deep Sea Drilling Project (1989): Archive of Core and Site/Hole Data and Photographs from the Deep Sea Drilling Project (DSDP). National Geophysical Data Center, NOAA. doi:10.7289/V54M92G2 [access date]
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