Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 223.50 Core: 26 Top of Core Depth (m) : 222.00 Sect: 1 Top of Section Depth(m): 222.00 LITHOLOGY: APHYRIC BASALT; Piece No. : PCES 1 (1-3), 2 (17-18), 3 (10-18), 3A (20-22), 4 (24-30), 5 (32-39), 6 (40-44), 7 (56-67), 8 (70-76), 9 (79-82), 10 (84-91), 11 (93-100), 12 (102-105), 13 (106-118), 14 (120-129), 15 (130-139), 16 (140-143), 17 (145-148); Texture : APHYRIC,COARSE-GRAINED(0.2-0.5MM); Structure : VEINS IN PCES 10+15 CALCITE-FILLED; Alteration : MOD SLIGHT WEATHERING AURAE IN PCES 7+9 RESULTING IN BROWN DISCOLORATION; Comments : DARK GRAY(N4) BASALT,SLIGHT BROWNISH DISCOLORATION IN PCES 7+9; Vesicles : Size(mm): TO 1 Percent: Location: Filling: CALCITE,UNIDENT Shape : SPHERICAL PCES 6-10,FILLED WITH WHITE MINERAL(IN PART CALCITE); Replacement: CALCITE SEVERAL PCES HAVE PYR DUSTING; Leg : 64 Top/Bottom Interval(mm): 0/ 150 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 223.65 Core: 26 Top of Core Depth (m) : 222.00 Sect: 2 Top of Section Depth(m): 223.50 LITHOLOGY: APHYRIC BASALT; Piece No. : PCES 1 (1-7), 2 (10-15); Texture : APHYRIC,COARSE-GRAINED,SAME AS CORE 26-1; Leg : 64 Top/Bottom Interval(mm): 0/1200 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 232.70 Core: 27 Top of Core Depth (m) : 231.50 Sect: 1 Top of Section Depth(m): 231.50 LITHOLOGY: VESICULAR BASALT GRADING TO APHYRIC BASALT; Piece No. : PCES 1 (0-1), 2A (3-11), 2B (10-16), 3 (18-37), 4A (41-50), 4B (50-57), 5 (60-65), 6 (67-69), 7 (72-83), 8 (86-94), 9 (96-99), 10 (101-108), 11 (110-120); Texture : PCES 2A-4B APHYRIC BASALT,PCES 5-11 APHANITIC BASALT; Structure : SMALL VEINS(<1MM THICK) PERVASIVELY FILLED WITH CALCITE & PYR & POSSIBLY DOLO; Alteration : FRESH Comments : PCE 1 IS SILTSTONE WITH DOLO XTLS & PYR,ALL PCES ARE MEDIUM-LIGHT GRAY(N6) COLOR; Vesicles : Size(mm): 2-5 Percent: Location: Filling: CALCITE,PYR Size(mm): 2-5 Percent: Location: Filling: CLAY,DOLO VESICULAR,MOST LINED WITH CALCITE & PYR & CLAY & DOLO,ID DOLO UNCERTAIN,PCES 2A-4B; Size(mm): <1 Percent: Location: Filling: CALCITE PCES 5-11,SMALL VESICLES,SOMETIMES FILLED; Replacement: CALCITE DOLOMITE CLAY Leg : 64 Top/Bottom Interval(mm): 0/ 200 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 253.60 Core: 29 Top of Core Depth (m) : 250.50 Sect: CC Top of Section Depth(m): 253.50 LITHOLOGY: APHYRIC BASALT; Piece No. : PCES NO PCE NUMBERS ASSIGNED; Texture : APHYRIC,SIMILAR TO UPPER PART OF CORE 27-1; Comments : MEDIUM GRAY(N6); Vesicles : Size(mm): TO 10 Percent: Location: Filling: CALCITE,PYR,CLAY HIGHLY VESICULAR,LINED; Replacement: CALCITE CLAY Leg : 64 Top/Bottom Interval(mm): 0/1270 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 338.77 Core: 40 Top of Core Depth (m) : 336.00 Sect: 2 Top of Section Depth(m): 337.50 LITHOLOGY: SEDIMENT; Leg : 64 Top/Bottom Interval(mm): 270/1370 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 338.87 Core: 40 Top of Core Depth (m) : 336.00 Sect: 2 Top of Section Depth(m): 337.77 LITHOLOGY: SEDIMENT; BAKED SILTY MUDSTONE OR CLAYSTONE; Piece No. : PCE A (127-137); Leg : 64 Top/Bottom Interval(mm): 370/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 339.00 Core: 40 Top of Core Depth (m) : 336.00 Sect: 2 Top of Section Depth(m): 337.87 LITHOLOGY: APHYRIC BASALT FRAGMENTS; Piece No. : PCES B (137-144), C (142-150); Texture : PCES OF APHYRIC & APHANITIC BASALT EMBEDDED IN MEDIUM-GRAY(N5-N6) SILTY MUDSTONE,PCE B IS A BAKED CONTACT WITH CHILLED BASALT & BAKED SELVAGE(NON- GLASSY); Leg : 64 Top/Bottom Interval(mm): 0/ 140 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 339.14 Core: 40 Top of Core Depth (m) : 336.00 Sect: 3 Top of Section Depth(m): 339.00 LITHOLOGY: APHYRIC BASALT; Piece No. : PCES NO PCE NUMBER ASSIGNED; Texture : 0-14CM FRAGMENTS(2-4CM) OF APHYRIC APHANITIC BASALT WITH LITHIFIED SILTY CLAYSTONE IN A CLAYEY MATRIX; Comments : DARK GRAY; Vesicles : SPARSELY VESICULAR; Leg : 64 Top/Bottom Interval(mm): 140/1300 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 340.30 Core: 40 Top of Core Depth (m) : 336.00 Sect: 3 Top of Section Depth(m): 339.14 LITHOLOGY: APHYRIC BASALT OR DOLERITE; Piece No. : PCES 1A (14-37), 1B (37-68), 2 (70-82), 3A (84-97), 3B (97-128); Texture : APHYRIC,COARSE-GRAINED(GENERALLY <1MM),DISTINCT MOTTLED APPEARANCE TO THE BASALT IN THE LOWER PART OF THE SECTION DUE TO LARGE IRREGULAR PYX XTLS WHICH CONTAIN PLAG XTLS-POIKILITIC TEXTURE; Structure : PCE 1B HAS VEIN; Alteration : MOD FELDSPAR SHOW SOME GREEN STAINING; FRESH CONSTITUENT MINERALS; Comments : MEDIUM GRAY(N5) WHEN DRY; Vesicles : Location: Filling: CLAY SPARSELY VESICULAR,GREEN CLAY FILLING,VERY LITTLE (IF ANY) CALCITE SINCE NO STRONG REACTION TO HCL ON VESICLE FILLING; Groundmass : PYROXENE LARGE IRREGULAR XTLS & WITH PLAG FORM POIKILITIC TEXTURE; PLAGIOCLASE OLIVINE FELDSPAR Replacement: CLAY CALCITE ID CALCITE UNCERTAIN SINCE NO STRONG REACTION TO HCL IN VEIN OR VESICLE FILLING; Leg : 64 Top/Bottom Interval(mm): 0/ 400 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 340.90 Core: 40 Top of Core Depth (m) : 336.00 Sect: 4 Top of Section Depth(m): 340.50 LITHOLOGY: APHYRIC BASALT OR DOLERITE; Piece No. : PCES 1 (0-18), 2 (19-30), 3 (32-40); Texture : APHYRIC,COARSE-GRAINED BASALT OR DOLERITE,MOTTLING EFFECT SEEN IN CORE 40-3 CONTINUES IN THIS SECTION; Structure : GREEN CLAY.MIN IN INTERSTICES; Alteration : MOD FRESH CONSTITUENT MINERALS; Comments : MEDIUM GRAY(N5); Vesicles : Location: Filling: CLAY WHITE CLAY.MIN FILLING,SPARSELY VESICULAR; Groundmass : PYROXENE OLIVINE PYX & OL FAIRLY FRESH; FELDSPAR SHOWS GREEN-TINT ALTERATION; Replacement: CLAY MINERALS WHITE IN VESICLES,GREEN IN INTERSTICES; Leg : 64 Top/Bottom Interval(mm): 0/ 780 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 346.28 Core: 41 Top of Core Depth (m) : 345.50 Sect: 1 Top of Section Depth(m): 345.50 LITHOLOGY: APHYRIC BASALT; Piece No. : PCE 1 (0-8), 2A (10-31), 2B (31-78); Alteration : MOD INTENSE IN VICINITY OF CLAY & ZEOLITE-FILLED VEINS (25-35CM, 62-64CM); Texture : APHYRIC,GRAIN-SIZE < 0.5MM); Groundmass : OLIVINE CLINOPYROXENE FELDSPAR GREEN-TINTED; Replacement: CLAY ZEOLITE CALCITE ( 0%) Leg : 64 Top/Bottom Interval(mm): 800/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 347.00 Core: 41 Top of Core Depth (m) : 345.50 Sect: 1 Top of Section Depth(m): 346.30 LITHOLOGY: DOLERITE; Piece No. : PCE 3 (80-130), 4 (130-150); Texture : MEDIUM-GRAINED, APHYRIC, AT TOP OF PCE 3 A CONCENTRATION OF FELSIC MINERALS WHICH MAY BE DUE TO A PLAG ACCUMULATION OR PART OF A REACTION AUREOLE AROUND A VEIN NOT RECOVERED; Comments : COLOR MEDIUM DARK-GRAY (N4-N5); Alteration : MOD ROCK HAS A "PATCHY"APPEARANCE DUE TO ALTERATION; Groundmass : OLIVINE Size(mm): 0.5-1.0 PYROXENE Size(mm): 0.5-1.0 PLAGIOCLASE Size(mm): 0.5-1.0 Leg : 64 Top/Bottom Interval(mm): 0/1400 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 348.40 Core: 41 Top of Core Depth (m) : 345.50 Sect: 2 Top of Section Depth(m): 347.00 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (0-10), 1B (10-30), 1C (22-40), 1D (40-62), 1E (60-84), 1F (82-93), 1G (90-103), 1H (102-110), 1I (110-129), 1J (127-139); Texture : MEDIUM-GRAINED APHYRIC; Structure : AT 103CM A 1CM CAVITY LINED WITH DRUSY WHITE XTLS (QTZ?),1-2MM WIDE VEINS OF ZEOL(?) & CLAY & QTZ; Alteration : MOD PCES 1A-1D+1I-1J,VICINITY OF VEINS; EXTENSIVELY PCES 1E-1H WITH PATCHES OF QTZ(?); Comments : MEDIUM GRAY(N5) WHEN DRY; Groundmass : CLINOPYROXENE PLAGIOCLASE OLIVINE Replacement: CLAY QUARTZ ZEOLITE ID ZEOL UNCERTAIN; Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 350.00 Core: 41 Top of Core Depth (m) : 345.50 Sect: 3 Top of Section Depth(m): 348.50 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (1-31), 1B (32-70), 1C (69-92), 1D (90-102), 1E (101-114), 1F (114-124), 1G (124-137), 1H (136-147); Texture : MEDIUM-GRAINED(1-1.5MM),APHYRIC; Structure : NARROW 1-2MM VEINS OF WHITE ZEOL & SI WITH REACTION AUREOLES,102-108CM DEVELOPMENT OF ELONGATE(TO 1CM) PYX XTLS IN A FELSIC GNDMASS(PROBABLY AN ALTERATION AREA BUT APPEARS PEGMATITIC); Alteration : MOD OCCASIONAL BLEBS OF WHITE SILICA(?) OR ZEOL(?); Comments : MEDIUM-GRAY(N4-N5); Groundmass : FELDSPAR PYROXENE XTLS,POSSIBLY AN ALTERATION AREA BUT APPEARS PEGMATITIC; Replacement: ZEOLITE SILICA ID SILICA UNCERTAIN; Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 351.50 Core: 41 Top of Core Depth (m) : 345.50 Sect: 4 Top of Section Depth(m): 350.00 LITHOLOGY: APHYRIC BASALT OR DOLERITE; Piece No. : PCES 1A (0-12), 1B (12-35), 1C (35-70), 1D (70-105), 1E (106-123), 1F (123-136), 1G (135-149); Texture : APHYRIC,MEDIUM-COARSE-GRAINED,APPEARS EQUIGRANULAR; Structure : CALCITE & CLAY VEINS(TO 0.5CM THICK); Alteration : MOD ALTERATION MORE SEVERE NEAR CALCITE & CLAY VEINS (ZONES UP TO 2CM WIDE); EXT 32-42CM, 95-104CM, 127-137CM; Comments : MEDIUM-GRAY(N5); Groundmass : CLINOPYROXENE OLIVINE PLAGIOCLASE Replacement: CALCITE CLAY Leg : 64 Top/Bottom Interval(mm): 0/1300 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 352.80 Core: 41 Top of Core Depth (m) : 345.50 Sect: 5 Top of Section Depth(m): 351.50 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (1-12), 1B (11-45), 1C (45-73), 1D (71-88), 1E (88-96), 1F (97-114), 1G (114-130); Texture : APHYRIC,MEDIUM-GRAINED(1-2MM),OCCASIONAL SILICA(?) BLEBS; Alteration : MOD FAIRLY BADLY ALTERED; Comments : MEDIUM-GRAY(N4-N5),CONTINUATION OF CORE 41-4; Groundmass : CLINOPYROXENE PLAGIOCLASE OLIVINE Replacement: SILICA ID SILICA UNCERTAIN; ZEOLITE Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 354.50 Core: 41 Top of Core Depth (m) : 345.50 Sect: 6 Top of Section Depth(m): 353.00 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (0-8), 1B (17-23), 1C (24-34), 1D (35-47), 1E (47-63), 1F (62-75), 1G (75-92), 1H (92-103), 1I (103-113), 1J (112-123), 1K (122-134), 1L (139-149); Texture : MEDIUM-GRAINED(0.5-1.5MM GRAINSIZE),APHYRIC; Structure : SEGREGATION OF MAFICS FROM FELSICS LEADING TO BLOTCHY APPEARANCE,LESS VEINING THAN IN PREVIOUS SECTIONS; Alteration : MOD ABUNDANT SECONDARY ALTERATION WITH DEVELOPMENT OF IRREGULAR BLEBS OF ZEOL & SILICA; Comments : MEDIUM-GRAY(N4-N5); Groundmass : PLAGIOCLASE PYROXENE OLIVINE Replacement: ZEOLITE SILICA Leg : 64 Top/Bottom Interval(mm): 0/1220 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 355.72 Core: 41 Top of Core Depth (m) : 345.50 Sect: 7 Top of Section Depth(m): 354.50 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (0-12), 1B (13-23), 1C (21-38), 1D (38-52), 1E (48-71), 1F (71-85), 1G (85-95), 2 (96-106), 3 (108-122); Texture : MEDIUM-GRAINED(1-2MM GRAINSIZE),APHYRIC,DISTINCT SEGREGATION OF MINERAL GRAINS PRODUCES A BLOTCHY APPEARANCE; Alteration : MOD PCES 1A-2,BLEBS OF AMORPHOUS WHITE ZEOL & SILICA ESPECIALLY IN PCS 1E+1F; Comments : MEDIUM-GRAY(N4-N5),CONTINUATION OF CORE 41-6,PCE 3 MARKS END OF CORE; Groundmass : CLINOPYROXENE PLAGIOCLASE OLIVINE Replacement: ZEOLITE SILICA Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 356.50 Core: 42 Top of Core Depth (m) : 355.00 Sect: 1 Top of Section Depth(m): 355.00 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (1-3), 1B (3-16), 1C (16-23), 1D (22-32), 1E (31-40), 1F (41-55), 1G (56-70), 1H (70-85), 1J (84-105), 1L (105-116), 1M (116-127), 1N (126-138), 1O (137-147); Texture : MEDIUM-GRAINED(0.5-1MM GRAINSIZE),APHYRIC,SIMILAR IN ALL RESPECTS TO CORE 41-1; Structure : SILICA-CALCITE-ZEOL VEINS; Alteration : MOD EXTENSIVELY AROUND SEVERAL VEINS(24-28+64-70+92-95CM); Comments : MEDIUM GRAY(N5); Vesicles : Location: Filling: SILICA SOME FILLED VUGS; Groundmass : CLINOPYROXENE PLAGIOCLASE OPAQUE MINERALS OLIVINE Replacement: CALCITE ZEOLITE SILICA Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 358.00 Core: 42 Top of Core Depth (m) : 355.00 Sect: 2 Top of Section Depth(m): 356.50 LITHOLOGY: APHYRIC BASALT; APHYRIC DOLERITE (MAJOR ROCK TYPE); Piece No. : PCES 1A (1-15), 1B (15-21), 1C (22-35), 1D (35-51), 1E (52-81), 1F (80-104), 1G (103-117), 1H (117-147); Texture : MEDIUM-GRAINED,APHYRIC,PCE 1G APPEARS TO HAVE SHARDS OF FRESH GLASS & MAY REPRESENT A CHILL ZONE,SMALL MINERAL SEGREGATIONS SEPARATED BY BLEBS OF FINER- GRAINED MATERIAL; Structure : VEINS FILLED WITH SILICA & ZEOL & SOME CALCITE; Alteration : MOD EXTENSIVELY ALTERATION ZONE PCE 1G,ZONES NEAR VEINS; Comments : MEDIUM-GRAY(N5-N6); Groundmass : CLINOPYROXENE OLIVINE PLAGIOCLASE OPAQUE MINERALS Replacement: ZEOLITE SILICA CALCITE VERY LITTLE; Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 359.50 Core: 42 Top of Core Depth (m) : 355.00 Sect: 3 Top of Section Depth(m): 358.00 LITHOLOGY: APHYRIC DOLERITE GRADING TO GABBRO; Piece No. : PCES 1A (1-12), 1B (10-14), 1C (13-21), 1D (20-31), 1E (30-43), 1F (43-67), 2 (69-73), 3A (76-85), 3B (87-97), 4 (98-103), 5A (106-115), 5B (115-127), 5C (127-134), 5D (135-140), 5E (141-149); Texture : MEDIUM-GRAINED PCES 1-2,APHYRIC,COARSE-GRAINED PCES 3A-5A APPROACHING GABBROIC TEXTURE WITH LARGE CPX & PLAG XTLS(1-3MM LONG),CONTACT IN PCE 3B ZONE OF PLAG & CPX PHYRIC BASALT-DOLERITE ENDS IN BASE OF PCE 5B, SIMILAR TO PREVIOUS SECTIONS; Structure : PCES 1-2 QTZ & ZEOL VEINS; Alteration : MOD EXTENSIVELY AROUND VEINS; Comments : PCES 1-2 MEDIUM-GRAY(N5); Groundmass : CLINOPYROXENE PLAGIOCLASE LARGE CPX & PLAG XTLS PCES 3A-5E; Replacement: QUARTZ ZEOLITE QTZ & ZEOL IN PCES 1-2; Leg : 64 Top/Bottom Interval(mm): 0/1050 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 360.55 Core: 42 Top of Core Depth (m) : 355.00 Sect: 4 Top of Section Depth(m): 359.50 LITHOLOGY: DOLERITE OR GABBRO; Piece No. : PCES 1A (0-24), 1B (25-32), 1C (32-40), 2 (42-48), 3 (52-59), 4 (61-69), 5A (72-82), 5B (83-88), 5C (90-93), 5D (94-101), 5E (102-105); Texture : EQUIGRANULAR COARSE-GRAINED DOLERITE TO GABBRO; Structure : VEINS SILICEOUS WITH LITTLE OR NO CALCITE; Alteration : MOD WEATHERED; Comments : MEDIUM GRAY(N5),PCE 5E MARKS END OF CORE; Phenocrysts: CLINOPYROXENE PLAGIOCLASE Replacement: SILICA CALCITE LITTLE OR NO CALCITE; Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 366.00 Core: 43 Top of Core Depth (m) : 364.50 Sect: 1 Top of Section Depth(m): 364.50 LITHOLOGY: DOLERITE OR GABBRO; Piece No. : PCES 1A (1-25), 1B (25-35), 1C (25-40), 1D (40-50), 1E (50-55), 1F (55-60), 1G (66-101), 1H (102-148); Texture : COARSE-GRAINED,DISCRETE APHYRIC ZONES OCCUR AT 70+116+138CM; Structure : DISCRETE APHYRIC ZONES SOMETIMES ASSOCIATED WITH SILICEOUS VEINS,ROCK VERY UNFRACTURED; Alteration : MOD Comments : MEDIUM-GRAY(N5); Groundmass : CLINOPYROXENE PLAGIOCLASE OLIVINE Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 367.50 Core: 43 Top of Core Depth (m) : 364.50 Sect: 2 Top of Section Depth(m): 366.00 LITHOLOGY: DOLERITE; Piece No. : PCES 1A (1-36), 1B (36-69), 1C (70-101), 1D (101-133), 1E (132-148); Texture : ZONES OF APHANITIC BASALT IN TOP OF PCE 1B & MOSTLY PCE 1E,CONTINUATION OF INCREASING GRAINSIZE SEEN IN LAST FEW CORES; Alteration : MOD Phenocrysts: OLIVINE SMALL PHENOS,ID OL UNCERTAIN,PRESENT IN APHANITIC ZONE; Groundmass : CLINOPYROXENE PLAGIOCLASE OLIVINE Leg : 64 Top/Bottom Interval(mm): 0/1420 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 368.92 Core: 43 Top of Core Depth (m) : 364.50 Sect: 3 Top of Section Depth(m): 367.50 LITHOLOGY: DOLERITE; Piece No. : PCES 1A (0-15), 1B (15-30), 1C (30-48), 1D (48-60), 1E (60-79), 1F (74-88), 1G (86-100), 1H (101-110), 1I (111-125), 1J (124-142); Texture : 1-2MM GRAINSIZE,2 APHANITIC ZONES IN PCES 1C & CONTINUES THROUGH PCES 1F-1G; Structure : ROCK IS VERY UNFRACTURED,ONE SMALL VEIN CUTS ACROSS THE TOP OF PCE 1I; Alteration : MOD Comments : GNDMASS MEDIUM GRAY(N5),APHANITIC ZONES ARE LIGHT GRAY(N7); Groundmass : CLINOPYROXENE PLAGIOCLASE OLIVINE Leg : 64 Top/Bottom Interval(mm): 0/1300 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 370.30 Core: 43 Top of Core Depth (m) : 364.50 Sect: 4 Top of Section Depth(m): 369.00 LITHOLOGY: DOLERITE SILL; Piece No. : PCES 1A (1-4), 1B (3-9), 1C (8-12), 1D (12-17), 1E (18-21), 1F (22-26), 2A (28-35), 2B (35-52), 2C (52-59), 2D (60-78), 2E (78-83), 2F (84-88), 2G (89-97), 2H (98-116), 2I (116-129); Texture : SAME AS CORE 43-3 EXCEPT FOR PCE 2D WHICH IS AN APHANITIC BASALT ZONE; Structure : PRINCIPALLY FILLED WITH SILICA & CLAY, SILL; Alteration : MOD Comments : PCE 2I MARKS END OF CORE; Replacement: SILICA CALCITE CLAY Leg : 64 Top/Bottom Interval(mm): 00/ 430 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 374.43 Core: 44 Top of Core Depth (m) : 374.00 Sect: 1 Top of Section Depth(m): 374.00 LITHOLOGY: GABBRO; Piece No. : PCE 1A (0-10), 1B (11-22), 1C (22-27), 1D (27-33), 1E (33-43); Comments : SIMILAR TO BASE OF CORE 42 (DOES DESCRIBER MEAN CORE 43? - ENCODER'S QUERY); Alteration : MOD Groundmass : CLINOPYROXENE OLIVINE PLAGIOCLASE Leg : 64 Top/Bottom Interval(mm): 430/1450 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 375.45 Core: 44 Top of Core Depth (m) : 374.00 Sect: 1 Top of Section Depth(m): 374.43 LITHOLOGY: MICRODOLERITE TO DOLERITE; Piece No. : PCE 1F (43-72), 1G (73-97), 1H (97-132), 1I (132-142), 1J (132-145), 1K (142-145); Texture : FROM PCE 1F BECOMES FINER GRAINED (DOLERITIC) TOWARD BASE, SMALL APHANITIC ZONE AT 116CM; Structure : LITTLE VEINING BUT 2 CALCITE VEINS OCCURRING, PCE 1E HAS BEAUTIFUL PYRITE VEINS ON THE SIDE; Comments : BECOMES LIGHTER IN COLOR (LIGHT TO RED-LIGHT GRAY (N6-N7); Alteration : SLIGHTLY ROCK BECOMES SIGNIFICANTLY FRESHER IN THIS ZONE; Replacement: PYRITE CALCITE Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 377.00 Core: 44 Top of Core Depth (m) : 374.00 Sect: 2 Top of Section Depth(m): 375.50 LITHOLOGY: DOLERITE; Piece No. : PCES 1 (1-22), 2 (25-33), 3A (36-88), 3B (88-123), 3C (124-149); Texture : EQUIGRANULAR; Structure : UNFRACTURED & NO VEINING; Alteration : FRESH Comments : MEDIUM-LIGHT GRAY(N6),CONTINUATION OF CORE 44-1; Leg : 64 Top/Bottom Interval(mm): 0/1400 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 378.40 Core: 44 Top of Core Depth (m) : 374.00 Sect: 3 Top of Section Depth(m): 377.00 LITHOLOGY: DOLERITE; Piece No. : PCES 1A (0-24), 1B (25-37), 1C (38-56), 1D (54-83), 1E (84-99), 1F (99-121), 1G (120-140); Comments : SAME AS IN CORE 44-2; Leg : 64 Top/Bottom Interval(mm): 0/1400 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 379.90 Core: 44 Top of Core Depth (m) : 374.00 Sect: 4 Top of Section Depth(m): 378.50 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (1-14), 1B (15-37), 1C (37-64), 1D (63-90), 1E (89-120), 1F (120-140); Texture : APHYRIC DOLERITE,COARSE-GRAINED EQUIGRANULAR; Structure : MAFICS TEND TO BE CONCENTRATED IN NARROW ZONES (2-3MM) SURROUNDING MORE FELSIC ZONES(TO 1MM ACROSS) GIVING A RATHER POLYGONAL APPEARANCE TO THE CUT SURFACES; Alteration : MOD REACTION RIMS AROUND RIMS NOTABLY MAFIC-FREE TINTED ALTERED FELD,OCCASIONAL BLEBS OF WHITE SI; Comments : MEDIUM-GRAY(N5) TO LIGHT-BROWNISH-GRAY 5YR6/1; Phenocrysts: PLAGIOCLASE Size(mm): TO 2 LATHS; Groundmass : PYROXENE OLIVINE FELDSPAR TINTED; Replacement: SILICA WHITE; Leg : 64 Top/Bottom Interval(mm): 0/1300 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 381.30 Core: 44 Top of Core Depth (m) : 374.00 Sect: 5 Top of Section Depth(m): 380.00 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (1-21), 1B (20-39), 1C (38-68), 1D (68-92), 1E (92-113), 1F (112-130); Texture : APHYRIC DOLERITE,APPROX EQUIGRANULAR; Structure : REACTION RIMS AROUND VEINS,MAFICS TEND TO BE CONCENTRATED IN NARROW ZONES AROUND MORE FELSIC AREAS APPROX 1.5CM DIAMETER; Alteration : MOD REACTION RIMS AROUND VEINS,OCCASIONAL BLEBS OF WHITE SILICA/ZEOL; Comments : MEDIUM GRAY TO LIGHT-BROWNISH-GRAY(N5-5YR6/1); Phenocrysts: PLAGIOCLASE Size(mm): TO 2 APPROX EQUIGRANULAR LATHS; Groundmass : PYROXENE OLIVINE Replacement: SILICA ZEOLITE Leg : 64 Top/Bottom Interval(mm): 0/1100 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 382.60 Core: 44 Top of Core Depth (m) : 374.00 Sect: 6 Top of Section Depth(m): 381.50 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (0-30), 1B (30-60), 1C (60-91), 1D (93-110); Texture : APHYRIC DOLERITE,APPROX EQUIGRANULAR; Structure : MAFICS CONCENTRATED IN NARROW ZONES AROUND MORE FELSIC AREAS APPROX 1.5CM DIAMETER; Alteration : MOD ALTERED FELDSPAR,OCCASIONAL BLEBS OF WHITE SI/ZEOL Comments : MEDIUM-GRAY TO LIGHT-BROWNISH-GRAY(N5 TO 5YR6/1); Phenocrysts: PLAGIOCLASE LATHS; Groundmass : PYROXENE OLIVINE ID OL UNCERTAIN; FELDSPAR Replacement: SILICA ZEOLITE Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 384.50 Core: 45 Top of Core Depth (m) : 383.00 Sect: 1 Top of Section Depth(m): 383.00 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCE 1 (1-149); Comments : FORMS PART OF 186.5CM LENGTH OF DOLERITE RETURNED TO SCRIPPS UNBROKEN,SECTION NOT SLICED,DRILLED SURFACES SHOW IDENTICAL CHARACTERISTICS TO CORES 44-6 & 45-2; Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 386.00 Core: 45 Top of Core Depth (m) : 383.00 Sect: 2 Top of Section Depth(m): 384.50 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1 (1-24), 2A (26-36), 2B (36-70), 2C (68-105), 2D (105-130), 2E (130-148); Texture : MEDIUM-GRAINED APHYRIC DOLERITE,MOTTLED OR BLOTCHY APPEARANCE DUE TO SEGREGATION OF MAFICS FROM FINER- GRAINED FELSIC PATCHES; Alteration : MOD PCES 2A+2D-2E; Comments : MEDIUM-GRAY(N5) TO LIGHT BROWNISH-GRAY(5YR6/1),PCE 1 SENT TO SCRIPPS,UNSLICED AS PART OF 188.8 CM LENGTH; Groundmass : CLINOPYROXENE ( 15%) PARTIALLY ALTERED TO A GREEN COLOR; PLAGIOCLASE ( 70%) OLIVINE ( 5%) Replacement: SILICA ZEOLITE Leg : 64 Top/Bottom Interval(mm): 0/1450 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 387.45 Core: 45 Top of Core Depth (m) : 383.00 Sect: 3 Top of Section Depth(m): 386.00 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (1-32), 1B (30-60), 1C (60-102), 1D (100-142); Texture : MEDIUM-GRAINED APHYRIC DOLERITE,MOTTLED OR BLOTCHY APPEARANCE DUE TO SEGREGATION OF MAFICS FROM FINER- GRAINED FELSIC PATCHES(SIMILAR TO CORES 45-1 & 45-2); Structure : FELDSPAR IN LOWER PART OF CORE ARE AMORPHOUS WHITE RATHER THAN TRANSLUCENT; Alteration : MOD FELD PROBABLY ALTERED & CPX APPEARS TO BE ALTERED; Comments : MEDIUM GRAY(N5) TO LIGHT BROWNISH-GRAY(5YR6/1); Groundmass : CLINOPYROXENE ( 15%) Size(mm): TO 2 PLAGIOCLASE ( 70%) Size(mm): TO 2 OLIVINE ( 5%) Size(mm): <1 FELDSPAR Leg : 64 Top/Bottom Interval(mm): 0/1450 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 388.95 Core: 45 Top of Core Depth (m) : 383.00 Sect: 4 Top of Section Depth(m): 387.50 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (0-4), 1B (3-15), 1C (16-40), 1D (40-80), 1E (80-111), 1F (111-130), 1G (130-144); Texture : MEDIUM-GRAINED APHYRIC DOLERITE,MOTTLED OR BLOTCHY APPEARANCE DUE TO SEGREGATION OF MAFICS FROM FINER- GRAINED FELSIC PATCHES(SIMILAR TO CORES 45-1 & 45-2); Structure : PCES 1A+1B SEVERE ZEOLITIZATION AROUND VEINS,VEIN PCE 1A; Alteration : MOD Comments : MEDIUM GRAY(N5) TO LIGHT BROWNISH-GRAY(5YR6/1); Groundmass : CLINOPYROXENE ( 15%) Size(mm): TO 2 PLAGIOCLASE ( 70%) Size(mm): TO 2 OLIVINE ( 5%) Size(mm): <1 Replacement: ZEOLITE AROUND VEIN IN PCES 1A+1B; Leg : 64 Top/Bottom Interval(mm): 0/1460 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 390.46 Core: 45 Top of Core Depth (m) : 383.00 Sect: 5 Top of Section Depth(m): 389.00 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (1-20), 1B (20-23), 1C (23-30), 1D (31-71), 1E (72-96), 1F (96-111), 1G (111-146); Texture : MEDIUM-GRAINED APHYRIC DOLERITE,MOTTLED OR BLOTCHY APPEARANCE,POIKILITIC TEXTURE; Structure : BLOTCHY APPEARANCE DUE TO SEGREGATION & IRREGULAR DISTRIBUTION OF MAFIC & FELSIC COMPONENTS; Alteration : MOD EXTENSIVELY 15-30CM INTERVAL; Comments : MEDIUM GRAY(N5) TO LIGHT BROWNISH-GRAY(5YR6/1); Groundmass : CLINOPYROXENE FELDSPAR CLAY OLIVINE Replacement: CLAY Leg : 64 Top/Bottom Interval(mm): 0/ 900 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 391.40 Core: 45 Top of Core Depth (m) : 383.00 Sect: 6 Top of Section Depth(m): 390.50 LITHOLOGY: APHYRIC DOLERITE; APHYRIC GABBRO; Piece No. : PCES 1A (1-8), 1B (9-50), 1C (50-80), 1D (81-87); Texture : MEDIUM-GRAINED APHYRIC DOLERITE,POIKILITIC/BLOTCHY APPEARANCE & TEXTURE & COMPOSITION SIMILAR TO CORE 45-5,PCE 1D IS APHYRIC GABBRO; Alteration : MOD EXT 77-87CM; Comments : MEDIUM GRAY(N5) TO LIGHT BROWNISH-GRAY(5YR6/1); Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 393.50 Core: 46 Top of Core Depth (m) : 392.00 Sect: 1 Top of Section Depth(m): 392.00 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (0-4), 1B (5-9), 1C (10-13), 1D (12-20), 1E (21-50), 1F (52-78), 1G (79-103), 1H (103-147); Texture : PCES 1A-1D COARSE-GRAINED APHYRIC GABBRO,PCS 1E-1H MEDIUM-GRAINED APHYRIC DOLERITE WITH POIKILITIC SEGREGATION OF MAFICS FROM FELSICS YIELDING A PATCHY APPEARANCE; Alteration : EXTENSIVELY PCES 1A-1D; MOD REMAINDER OF SECTION; Comments : PCES 1A-1D DARK BROWNISH-GRAY(5YR6/1),PCES 1E-1H (N5 TO 5YR6/1); Phenocrysts: COMBINATION PYX-FELD INTERGROWTHS,PINKISH AGGS,APPEAR TO HAVE XTLLINE STRUCTURE; Groundmass : PLAGIOCLASE CLINOPYROXENE OLIVINE PLAG & CPX & OL IN PCES 1A-1D; ZEOLITE Replacement: SILICA PCES 1E-1H,AMORPHOUS; Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 395.00 Core: 46 Top of Core Depth (m) : 392.00 Sect: 2 Top of Section Depth(m): 393.50 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (0-25), 1B (25-53), 1C (53-73), 1D (73-99), 1E (98-125), 1F (124-150); Texture : MEDIUM-GRAINED APHYRIC DOLERITE,PATCHY APPEARANCE (POIKILITIC); Structure : SEGREGATION OF MAFICS CAUSES BLOTCHY APPEARANCE,ZEOL -FILLED CAVITIES(?); Alteration : MOD Comments : MEDIUM GRAY TO MEDIUM BROWNISH-GRAY(5YR6/1); Groundmass : PYROXENE PLAGIOCLASE OLIVINE Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 396.50 Core: 46 Top of Core Depth (m) : 392.00 Sect: 3 Top of Section Depth(m): 395.00 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (1-35), 1B (34-57), 1C (56-77), 1D (76-95), 1E (95-101), 1F (101-110), 1G (109-132), 1H (130-149); Texture : MEDIUM-GRAINED APHYRIC DOLERITE,COARSE-GRAINED ALMOST GABBROIC INTERVAL AT 93-101CM,BLOTCHY APPEARANCE SIMILAR TO PREVIOUS SECTIONS,POIKILITIC TEXTURE MAY BE DUE TO GROWTH OF 1-1.5CM INTERGROWN XTLS OF FELDSPAR & OPX(?); Structure : VEINING NOTICEABLY LESS THAN IN PREVIOUS CORES,ZEOL & SI-FILLED CAVITIES IN PCES 1A+1D-1E,NUMEROUS EMPTY CAVITIES IN GABBROIC SECTION PERHAPS DUE TO HYDROTHERMAL DISSOLUTION; Alteration : MOD APPEARS TO BE DECREASING; EXTENSIVELY INTERVAL 88-105CM; Comments : MEDIUM GRAY(N5) TO MEDIUM LIGHT BROWNISH-GRAY (5YR6/1); Groundmass : PYROXENE FELDSPAR ORTHOPYROXENE ID OPX UNCERTAIN; PLAGIOCLASE OLIVINE Replacement: ZEOLITE SILICA Leg : 64 Top/Bottom Interval(mm): 0/1350 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 397.85 Core: 46 Top of Core Depth (m) : 392.00 Sect: 4 Top of Section Depth(m): 396.50 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (0-25), 1B (25-42), 1C (42-75), 1D (75-94), 1E (95-110), 1F (111-116), 1G (115-132); Texture : MEDIUM-GRAINED(GRAINSIZE 1-1.5MM),APHYRIC DOLERITE; Alteration : MOD OCCASIONAL SMALL(1MM) AMORPHOUS WHITE BLEBS OF SI & ZEOL; Comments : MEDIUM GRAY(N5); Groundmass : FELDSPAR SLIGHTLY ALTERED; CLINOPYROXENE OLIVINE FRESHER THAN FELDSPAR; Replacement: SILICA ZEOLITE SILICA & ZEOL IN AMORPHOUS BLEBS; Leg : 64 Top/Bottom Interval(mm): 0/1150 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 399.15 Core: 46 Top of Core Depth (m) : 392.00 Sect: 5 Top of Section Depth(m): 398.00 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (1-20), 1B (20-45), 1C (45-60), 1D (60-85), 1E (85-112); Texture : MEDIUM-GRAINED APHYRIC DOLERITE,GRAINSIZE 1-1.5MM, LARGER POIKILOBLASTS OF PYX ENCLOSING FELD PRODUCE BLOTCHY APPEARANCE; Structure : FINE WHITE VEINS OF SILICA & ZEOL; Alteration : MOD OCCASIONAL SMALL AMORPHOUS WHITE BLEBS OF SILICA & ZEOL; MOD FELDSPAR; Groundmass : FELDSPAR CLINOPYROXENE OLIVINE Replacement: SILICA Leg : 64 Top/Bottom Interval(mm): 0/1400 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 411.40 Core: 48 Top of Core Depth (m) : 410.00 Sect: 1 Top of Section Depth(m): 410.00 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (1-6), 1B (7-18), 1C (17-28), 2A (30-32), 2B (32-36), 2C (38-40), 2D (41-45), 2E (45-48), 3A (50-67), 3B (67-80), 3C (85-115), 3D (115-137); Texture : MEDIUM-GRAINED,APHYRIC,GRAINSIZE 1-1.5,SIMILAR TO CORE 46; Alteration : MOD Comments : MEDIUM-GRAY(N5); Groundmass : FELDSPAR SLIGHTLY ALTERED; CLINOPYROXENE OLIVINE CPX & OL FRESHER THAN FELDSPAR; Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 413.50 Core: 49 Top of Core Depth (m) : 412.00 Sect: 1 Top of Section Depth(m): 412.00 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (1-25), 1B (25-50), 1C (51-65), 1D (65-80), 1E (81-104), 1F (101-110), 1G (110-125), 1H (125-138), 1I (139-150); Texture : MEDIUM-GRAINED,APHYRIC,BLOTCHY APPEARANCE DUE TO OPHITIC TEXTURES; Structure : VEIN SEPARATING PCES 1D+1E HAS CAUSED CONSIDERABLE REXTLLLIZATION OF THESE PCES FOR A DISTANCE OF 2CM EITHER SIDE OF VEIN; Alteration : MOD ALTERATION APPEARS TO BE LESS THAN IN PREVIOUS CORES,MINOR AMORPHOUS BLEBS OF SILICA & ZEOL; Comments : MEDIUM-GRAINED(N4/N5); Groundmass : CLINOPYROXENE PLAGIOCLASE PALE-GREEN PYX XTLS OPHITICALLY ENCLOSE SMALL PLAG LATHS,LARGER PYX XTLS SURROUNDED BY DARK GREEN PYX & PLAG & ORE; OPAQUE MINERALS Replacement: SILICA ZEOLITE Leg : 64 Top/Bottom Interval(mm): 0/1450 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 414.95 Core: 49 Top of Core Depth (m) : 412.00 Sect: 2 Top of Section Depth(m): 413.50 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (0-12), 1B (12-22), 1C (23-32), 1D (32-47), 1E (47-61), 1F (60-83), 1G (83-105), 1H (105-130), 1I (130-145); Texture : IDENTICAL TO CORE 49-1; Structure : PCES 1E-1F+1H SILICA &/OR ZEOL-FILLED VEINS WITH NO CALCITE; Alteration : MOD Comments : CONTINUATION OF CORE 49-1; Replacement: SILICA ZEOLITE Leg : 64 Top/Bottom Interval(mm): 0/1450 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 416.45 Core: 49 Top of Core Depth (m) : 412.00 Sect: 3 Top of Section Depth(m): 415.00 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (0-5), 1B (5-41), 1C (40-75), 1D (74-94), 1E (93-130), 1F (130-142); Texture : IDENTICAL TO CORES 49-1 & 49-2; Structure : ZEOL &/OR SI-VEINS IN PCES 1C+1F(NO CARB DETECTED); Alteration : MOD PERHAPS FRESHER THAN CORES 49-1 & 49-2; Comments : CONTINUATION OF CORE 49-2; Replacement: SILICA ZEOLITE Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 420.50 Core: 50 Top of Core Depth (m) : 419.00 Sect: 1 Top of Section Depth(m): 419.00 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (0-39), 1B (38-79), 1C (79-128), 1D (128-149); Texture : MEDIUM-GRAINED APHYRIC DOLERITE,INEQUIGRANULAR, POIKILITIC TEXTURE; Structure : PCE 1A EXTENSIVELY VEINED & FILLED WITH SI &/OR ZEOL (NO CARB); Alteration : FRESHER THAN PREVIOUS CORES; Comments : MEDIUM GRAY(N5) TO MEDIUM-DARK GRAY(N4); Groundmass : PYROXENE Size(mm): 1-1.5 PINKISH-GRAY & ROUNDED & ANHEDRAL DIFFUSE XTLS; FELDSPAR PLAGIOCLASE PYX(SUBOPHITICALLY ENCLOSING PLAG) IN A MATRIX OF FELDSPAR & DARK PYX & ORE & OL; Replacement: SILICA ZEOLITE CARBONATE ( 0%) Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 422.00 Core: 50 Top of Core Depth (m) : 419.00 Sect: 2 Top of Section Depth(m): 420.50 LITHOLOGY: DOLERITE; Piece No. : PCES 1A (1-40), 1B (40-88), 1C (87-130), 1D (130-148); Texture : IDENTICAL TO CORE 50-1; Structure : VERY DIFFUSE WHITE VEIN IN PCE 1B(58-63CM); Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 423.50 Core: 50 Top of Core Depth (m) : 419.00 Sect: 3 Top of Section Depth(m): 422.00 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (1-7), 1B (7-27), 1C (27-40), 1D (40-55), 1E (55-73), 1F (73-95), 1G (94-130), 1H (130-145); Texture : INEQUIGRANULAR DOLERITE,APHYRIC,ESSENTIALLY IDENTICAL TO PREVIOUS 2 SECTIONS; Structure : PCES 1B+1F-1G MINOR VEINING(NOT CALCITE); Alteration : FRESH Comments : MEDIUM-GRAY TO MEDIUM DARK GRAY(N5-N4); Groundmass : PYROXENE LARGE BROWNISH-GRAY IRREGULAR PYX,DARK GREEN PYX; PLAGIOCLASE OLIVINE ID UNCERTAIN FOR OL; OPAQUE MINERALS Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 425.00 Core: 50 Top of Core Depth (m) : 419.00 Sect: 4 Top of Section Depth(m): 423.50 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (1-10), 1B (11-56), 1C (55-87), 1D (87-119), 1E (118-148); Texture : SAME AS PREVIOUS SECTION,ACCENTUATION OF DARK MINERALS CAUSING A SPECKLED APPEARANCE ADJACENT TO THE VEINS; Structure : 2 VEINS RUNNING ALMOST THE LENGTH OF THE SECTION ARE 3-5MM WIDE & CONTAIN APHANITIC PALE GRAY MINERALS (NOT CALCITE); Alteration : MOD REACTION OF VEIN WITH COUNTRY ROCK CONSIDERABLE; Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 426.50 Core: 50 Top of Core Depth (m) : 419.00 Sect: 5 Top of Section Depth(m): 425.00 LITHOLOGY: DOLERITE; Piece No. : PCES 1A (1-14), 1B (16-30), 1C (28-49), 1D (48-76), 1E (75-101), 1F (99-118), 1G (118-143); Texture : ESSENTIALLY IDENTICAL TO CORE 50-3; Structure : TWO MINOR VEINS IN PCES 1C+1G(NOT CALCITE-PROBABLY SILICA &/OR ZEOL); Replacement: SILICA ZEOLITE ID SILICA & ZEOL UNCERTAIN; Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 428.00 Core: 50 Top of Core Depth (m) : 419.00 Sect: 6 Top of Section Depth(m): 426.50 LITHOLOGY: DOLERITE; Piece No. : PCES 1A (0-16), 1B (15-31), 1C (31-49), 1D (48-76), 1E (76-110), 1F (110-137), 1G (136-147); Texture : ESSENTIALLY IDENTICAL TO CORE 50-3; Structure : MINOR VEINS IN PCES 1A+1C+1G(NOT CALCITE-PROBABLY SILICA &/OR ZEOL); Replacement: SILICA ZEOLITE ID SILICA & ZEOL UNCERTAIN; Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 429.50 Core: 51 Top of Core Depth (m) : 428.00 Sect: 1 Top of Section Depth(m): 428.00 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (1-3), 1B (3-8), 1C (8-10), 2A (11-53), 2B (53-78), 2C (79-90), 2D (90-111), 2E (110-128), 2F (128-146); Texture : APHYRIC,MEDIUM-GRAINED BUT STRONGLY INEQUIGRANULAR DOLERITE,POIKILITIC TEXTURE,PCES 1A-1C PCES OF PYX GABBRO; Alteration : MOD PCES 1A-1C+2F,WEATHERING VERY SLIGHT; FRESH PCES 2A-2E; Comments : MEDIUM-GRAY(N5); Groundmass : PYROXENE LARGE,ROUNDED,ANHEDRAL,GRAY-BROWN XTLS; PLAGIOCLASE CLINOPYROXENE OLIVINE OPAQUE MINERALS Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 431.00 Core: 51 Top of Core Depth (m) : 428.00 Sect: 2 Top of Section Depth(m): 429.50 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (1-20), 1B (19-40), 1C (39-49), 1D (49-59), 1E (58-79), 1F (78-96), 1G (95-111), 1H (111-130), 1I (130-149); Texture : APHYRIC MEDIUM-GRAINED POIKILITIC DOLERITE,SIMILAR TO CORE 51-1; Structure : ABUNDANT PLAG-CPX GABBRO XENOLITHS(TO 10CM ACROSS); Comments : MEDIUM GRAY(N5); Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 432.50 Core: 51 Top of Core Depth (m) : 428.00 Sect: 3 Top of Section Depth(m): 431.00 LITHOLOGY: DOLERITE; Piece No. : PCES 1A (0-12), 1B (13-33), 1C (33-46), 1D (47-53), 1E (53-62), 1F (62-72), 1G (73-91), 1H (92-110), 1I (110-125), 1J (125-131), 1K (130-147); Texture : 20% OF ROCK COARSE-GRAINED XENOLITHS OF PYX-FELDSPAR GABBRO,SIMILAR TO CORE 51-1,POIKILITIC DOLERITE; Structure : CAVITIES IN XENOLITHS CONTAIN ACICULAR ZEOL IN ADDITION TO CRYPTOXTLLINE SILICA; Alteration : FRESH IN GENERAL,BOTH GABBRO & DOLERITE; Replacement: ZEOLITE SILICA Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 434.00 Core: 51 Top of Core Depth (m) : 428.00 Sect: 4 Top of Section Depth(m): 432.50 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (1-19), 1B (18-35), 1C (35-48), 1D (45-58), 1E (58-74), 1F (75-93), 1G (94-102), 1H (101-120), 1I (121-127), 1J (125-137), 1K (136-147); Texture : MEDIUM-GRAINED,INEQUIGRANULAR,APHYRIC,POIKILITIC, SIMILAR TO CORE 51-1; Structure : 5% 5-10CM WIDE XENOLITHS OF PYX-FELDSPAR GABBRO, XENOLITHS HAVE ZEOL-LINED OR FILLED CAVITIES; Alteration : MOD PCES 1I-1J; FRESH REMAINDER OF SECTION; Comments : MEDIUM GRAY(N4-N5); Groundmass : PYROXENE FELDSPAR PYX & FELDSPAR IN GABBRO XENOLITHS; Replacement: ZEOLITE Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 435.50 Core: 51 Top of Core Depth (m) : 428.00 Sect: 5 Top of Section Depth(m): 434.00 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (1-10), 1B (10-30), 1C (30-45), 1D (45-55), 1E (55-84), 1F (85-109), 1G (109-124), 1H (125-134), 1I (135-148); Texture : ESSENTIALLY SIMILAR TO CORE 51-4; Structure : FEWER GABBRO XENOLITHS THAN CORE 51-4,AMORPHOUS SI &/OR ZEOL-FILLED CAVITIES(TO 2MM ACROSS) IN PCE 1G (117-120CM); Replacement: SILICA ZEOLITE Leg : 64 Top/Bottom Interval(mm): 0/1350 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 436.85 Core: 51 Top of Core Depth (m) : 428.00 Sect: 6 Top of Section Depth(m): 435.50 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (0-11), 1B (10-28), 1C (28-43), 1D (43-62), 1E (62-79), 1F (79-89), 1G (89-111), 1H (111-120), 1I (121-135); Texture : MEDIUM-GRAINED,APHYRIC,INEQUIGRANULAR POIKILITIC, TEXTURE & MINERALOGY VERY SIMILAR TO THOSE IN PRECEDING CORES & SECTIONS,POIKILOBLASTIC XTLS OF PINKISH-GRAY PYX SUBOPHITICALLY ENCLOSING PLAG; Alteration : FRESH MOD 87-91CM INTERVAL DEVELOPMENT OF OCCASIONAL BLEBS OF AMORPHOUS SILICA &/OR ZEOL; Comments : MEDIUM GRAY(N5) TO MEDIUM-DARK GRAY(N4); Groundmass : PYROXENE PINKISH-GRAY XTLS SUBOPHITICALLY ENCLOSING PLAG; PLAGIOCLASE FELDSPAR PYROXENE DARK-GREEN; OLIVINE OPAQUE MINERALS FELDSPAR,DARK-GREEN PYX & OL SURROUND PINKISH-GRAY POIKILOBLASTS; Replacement: SILICA ZEOLITE Leg : 64 Top/Bottom Interval(mm): 0/1400 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 438.40 Core: 52 Top of Core Depth (m) : 437.00 Sect: 1 Top of Section Depth(m): 437.00 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (1-13), 1B (12-25), 1C (25-34), 1D (34-60), 1E (60-80), 1F (80-104), 1G (103-130), 1H (131-140); Texture : MEDIUM-GRAINED,APHYRIC,INEQUIGRANULAR-POIKILITIC, SIMILAR TO CORE 51-1 WITH NO GABBRO XENOLITHS; Structure : EXTENSIVE AMORPHOUS SI & ZEOL VEINS IN SEVERAL PCES; Alteration : MOD MORE ALTERED THAN IN CORE 51-1; Comments : MEDIUM-DARK GRAY TO DARK GRAY(N4-N3); Groundmass : PYROXENE LARGE,PINKISH-GRAY XTLS OPHITICALLY ENCLOSE PLAG; PLAGIOCLASE PYROXENE GREEN; OLIVINE OPAQUE MINERALS Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 440.00 Core: 52 Top of Core Depth (m) : 437.00 Sect: 2 Top of Section Depth(m): 438.50 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (1-10), 1B (10-17), 1C (17-30), 1D (29-50), 1E (50-63), 1F (62-81), 1G (82-89), 1H (89-98), 1I (98-109), 1J (109-117), 1K (117-125), 1L (125-131), 1M (132-138), 1N (140-148); Texture : MEDIUM-GRAINED,APHYRIC,POIKILITIC(?),SIMILAR TO CORE 52-1; Structure : ONE LARGE QTZ & ZEOL VEIN CUTS THROUGH PCES 1F+1G+ 1H; Alteration : MOD Comments : MEDIUM-DARK GRAY(N4-N5); Groundmass : CLINOPYROXENE APPEARS TO BE POIKILITICALLY ENCLOSED AFTER MINERAL PHASES EXCEPT FOR MORE ABUNDANT OL,LARGE ANHEDRAL XTLS; OLIVINE Replacement: QUARTZ ZEOLITE Leg : 64 Top/Bottom Interval(mm): 0/1410 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 441.41 Core: 52 Top of Core Depth (m) : 437.00 Sect: 3 Top of Section Depth(m): 440.00 LITHOLOGY: CPX POIKILITIC DOLERITE; Piece No. : PCES 1A (1-6), 1B (7-15), 1C (15-27), 1D (27-40), 1E (40-56), 1F (57-70), 1G (70-80), 1H (80-94), 1I (94-107), 1J (107-117), 1K (117-128), 1L (128-141); Texture : HOMOGENOUS,POIKILITIC,SIMILAR TO CORES 52-1 & 52-2; Structure : LITTLE VEINING,SMALL SILIC VEIN IN PCE 1I, UNFRACTURED; Alteration : MOD Comments : MEDIUM-DARK GRAY; Phenocrysts: CLINOPYROXENE Replacement: SILICA Leg : 64 Top/Bottom Interval(mm): 0/1410 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 442.91 Core: 52 Top of Core Depth (m) : 437.00 Sect: 4 Top of Section Depth(m): 441.50 LITHOLOGY: DOLERITE; Piece No. : PCES 1A (1-16), 1B (17-28), 1C (29-41), 1D (42-56), 1E (57-63), 1F (64-86), 1G (86-100), 1H (100-119), 1I (119-134), 1J (134-145); Texture : HOMOGENOUS,SIMILAR IN ALL RESPECTS TO CORES 52-1 TO 52-3,POIKILITIC MOTTLING LESS PRONOUNCED; Structure : NO VEINING & LESS FRACTURED; Alteration : MOD FRESHER THAN PREVIOUS SECTIONS; Comments : MEDIUM-DARK GRAY(N4-N5); Leg : 64 Top/Bottom Interval(mm): 0/1450 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 444.45 Core: 52 Top of Core Depth (m) : 437.00 Sect: 5 Top of Section Depth(m): 443.00 LITHOLOGY: DOLERITE; Piece No. : PCES 1A (1-10), 1B (11-17), 2 (19-27), 3A (30-38), 3B (37-56), 3C (56-65), 3D (60-70), 3E (70-80), 3F (80-90), 3G (90-96), 3H (96-101), 3I (102-105), 3J (105-120), 3K (121-145); Texture : MORE HOMOGENOUS & LESS MOTTLED & FINER-GRAINED THAN PREVIOUS CORES; Alteration : MOD PCES 1A-2 MORE ALTERED THAN REST OF SECTION(AT BASE OF PCE 1B ESPECIALLY); Comments : MEDIUM GRAY TO MEDIUM-LIGHT GRAY(N5-N6); Groundmass : CLINOPYROXENE PLAGIOCLASE OLIVINE Leg : 64 Top/Bottom Interval(mm): 0/1410 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 445.91 Core: 52 Top of Core Depth (m) : 437.00 Sect: 6 Top of Section Depth(m): 444.50 LITHOLOGY: DOLERITE; Piece No. : PCES 1A (1-25), 1B (25-38), 1C (39-69), 1D (70-85), 1E (86-121), 1F (122-133), 1G (133-141); Texture : HOMOGENOUS,SIMILAR TO CORE 52-5,MOTTLING NOT AS PREVALENT AS IN SECTIONS 1 THRU 4,PCE 1E APPPEARS TO HAVE AN OL SEGREGATION IN IT; Structure : UNFRACTURED & UNVEINED; Alteration : SLIGHTLY TO MOD Comments : MEDIUM GRAY(N5); Groundmass : OLIVINE SEGREGATION IN PCE 1E; Leg : 64 Top/Bottom Interval(mm): 0/ 500 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 446.50 Core: 52 Top of Core Depth (m) : 437.00 Sect: 7 Top of Section Depth(m): 446.00 LITHOLOGY: DOLERITE; Piece No. : PCES 1A (0-23), 1B (24-50); Texture : SAME AS CORE 52-6,MOTTLING BECOMING PROGRESSIVELY LESS PROMINENT,HOMOGENOUS; Structure : UNFRACTURED & UNVEINED; Alteration : SLIGHTLY Comments : MEDIUM-GRAY(N6),PCE 1B MARKS END OF CORE 52; Leg : 64 Top/Bottom Interval(mm): 0/1400 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 447.40 Core: 53 Top of Core Depth (m) : 446.00 Sect: 1 Top of Section Depth(m): 446.00 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (1-15), 1B (16-41), 1C (40-65), 1D (65-70), 1E (70-86), 1F (86-105), 1G (105-130), 1H (130-140); Texture : HOMOGENOUS,FINE-GRAINED,APHYRIC,VERY LITTLE MOTTLING; Structure : UNFRACTURED,ONE SMALL SI & CLAY VEIN PRESENT IN PCE 1H; Alteration : SLIGHTLY MOD 130-140CM; Replacement: SILICA CLAY Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 449.00 Core: 53 Top of Core Depth (m) : 446.00 Sect: 2 Top of Section Depth(m): 447.50 LITHOLOGY: DOLERITE; Piece No. : PCES 1 (1-7), 2A (10-18), 2B (19-37), 2C (39-50), 2D (51-70), 2E (70-79), 2F (80-85), 2G (84-93), 2H (93-102), 2I (103-111), 2J (112-125), 2K (126-136), 2L (137-150); Texture : SAME AS CORE 53-1; Structure : MORE SILICA/ZEOL VEINS THAN IN CORE 53-1,PCE 2F SPLI ALONG THE SURFACE OF A VEIN; Alteration : SLIGHTLY TO MOD PCES 1 & 2E-2G MODERATELY ALTERED; Comments : MEDIUM-LIGHT GRAY(N6); Replacement: SILICA CLAY ZEOLITE Leg : 64 Top/Bottom Interval(mm): 0/1450 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 450.45 Core: 53 Top of Core Depth (m) : 446.00 Sect: 3 Top of Section Depth(m): 449.00 LITHOLOGY: DOLERITE; Piece No. : PCES 1A (1-13), 1B (12-16), 1C (17-30), 1D (30-40), 1E (40-50), 1F (50-60), 1G (60-71), 1H (71-85), 1I (85-95), 1J (95-108), 1K (109-111), 1L (112-114), 1M (115-117), 1N (118-130), 1O (130-145); Texture : SAME AS CORE 53-2,FINE-GRAINED,HOMOGENOUS,PCES 1M-1O ARE SLIGHTLY FINER-GRAINED THAN PCES 1A-1L; Structure : FEW VEINS,PCES 1D+1E NOT FRACTURED,MINOR VEINS CONTAIN CALCITE; Alteration : SLIGHTLY TO MOD PCES 1D & 1G MODERATELY ALTERED; Comments : MEDIUM-LIGHT GRAY(N6); Replacement: CALCITE Leg : 64 Top/Bottom Interval(mm): 0/1000 Analyst: Fornari, D. Hole: 478 Sample Midpoint (m) : 451.50 Core: 53 Top of Core Depth (m) : 446.00 Sect: 4 Top of Section Depth(m): 450.50 LITHOLOGY: APHYRIC DOLERITE; Piece No. : PCES 1A (1-13), 1B (13-31), 1C (32-46), 1D (46-53), 1E (53-61), 1F (62-75), 1G (75-98); Texture : APHYRIC,FINE-GRAINED,SIMILAR TO CORE 53-3; Structure : EXTENSIVE MICROFRACTURING IN PCE 1D WHICH SOMEWHAT CONTINUES INTO PCES 1C+1E; Alteration : SLIGHTLY TO MOD PCE 1D MODERATELY ALTERED; Comments : MEDIUM GRAY TO MEDIUM-LIGHT GRAY(N5-N6); Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 456.50 Core: 54 Top of Core Depth (m) : 455.00 Sect: 1 Top of Section Depth(m): 455.00 LITHOLOGY: APHYRIC BASALT OR DOLERITE; Piece No. : PCES 1A (0-10), 1B (10-20), 2A (21-22), 2B (23-25), 2C (25-28), 2D (28-30), 3 (32-38), 4A (41-51), 4B (50-100), 5A (102-103), 5B (103-106), 5C (106-113), 5D (113-119), 6 (120-141); Texture : APHYRIC,COARSE-GRAINED WITH GRAINSIZE PROGRESSIVELY DECREASING THROUGH SECTION,SPECKLED APPEARANCE, PROPORTION OF FELDSPAR INCREASES DOWN THE SECTION; Structure : FRACTURES LINED WITH GREEN CLAY; Alteration : MOD Comments : MEDIUM GRAY(N5),ROCK AT BOTTOM OF THIS SECTION AND THROUGHOUT REST OF CORE IS DIFFERENT FROM THAT IN CORE 53, THE LATTER HAS A FINE-GRAINED FRESH DOLERITIC APPEARANCE WHEREAS THIS SECTION HAS A "SPECKLED" APPEARANCE WITH ALTERED FELDSPAR LATHS LYING IN A DK GREEN CPX-OL MATRIX; Phenocrysts: FELDSPAR ( 50%) 1-4MM LONG & 0.5-1MM WIDE LATHS IN PCE 1A & 1.5MM IN LENGTH & <0.5MM WIDE IN PCE 6,PROPORTION INCREASES DOWN THE SECTION,ALTERED; Groundmass : CLINOPYROXENE DARK; OLIVINE TOTAL % CPX & OL IS 50%; Replacement: CLAY GREEN; Leg : 64 Top/Bottom Interval(mm): 0/ 800 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 457.30 Core: 54 Top of Core Depth (m) : 455.00 Sect: 2 Top of Section Depth(m): 456.50 LITHOLOGY: APHYRIC BASALT; Piece No. : PCE 1A (0-45), 1B (45-58), 2 (60-80); Texture : APHYRIC, VERY FINE-GRAINED, GRAINSIZE GENERALLY LESS THAN 0.5MM; Structure : BOTTOM PART OF INTERVAL BECOMES FRAGMENTED, CHLORITE VEIN IN PIECE 1A; Alteration : MOD; Comments : MEDIUM LIGHT GREY BASALT, CONTINUATION OF SECT. 1; Replacement: CLAY MINERALS ABUNDANT; CHLORITE ID UNCERTAIN FOR CHLORITE,FILLS VEIN; Leg : 64 Top/Bottom Interval(mm): 800/ 950 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 457.45 Core: 54 Top of Core Depth (m) : 455.00 Sect: 2 Top of Section Depth(m): 457.30 LITHOLOGY: BASALT; Piece No. : PCE 3A (80-83), 3B (83-87), 3C (86-90), 3D (91-93), 3E (91-94); Texture : APHANITIC; Structure : SMALL FRAGMENTS COMPRISING APHANITIC GREENISH GRAY (5 G 6/1) BASALT; Alteration : MOD; Comments : GREENISH GRAY COLOR (5 G 6/1), PCE 1A CONTAINS CONTACT BETWEEN APHANITIC BASALT (CONT. OF 0-80) AND MORE COARSELY XTLLINE BASALT (90-140); Vesicles : Size(mm): Percent: RARE Location: Filling: SMECTITE SMEC-LINED VESICLES OR CAVITIES; Leg : 64 Top/Bottom Interval(mm): 950/1450 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 457.95 Core: 54 Top of Core Depth (m) : 455.00 Sect: 2 Top of Section Depth(m): 457.45 LITHOLOGY: APHYRIC BASALT; Piece No. : PCE 4A (95-105), 4B (105-111), 4C (112-125), 4D (122-144), 4E (140-145); Texture : FINE-GRAINED,APHYRIC; Alteration : MOD; Comments : CONTACT: INTERVAL 80-95: UPPER UNIT (0-80) APPEARS TO BE CHILLED AGAINST LOWER UNIT (95-145) WITH POSSIBLE REGROWTH OF FELDSPARS IN LOWER UNIT (SEE T.S. DESCRIPTION); Groundmass : FELDSPAR Size(mm): 1-2 VERY ELONGATE, RANDOMLY ORIENTED LATHS IN PCES 4A AND 4B, BUT IN PCES (4C,4D, & 4E) THEY ARE LESS WELL DEVELOPED; Replacement: CHLORITE Minerals Replaced: MAFICS ID UNCERTAIN FOR CHLORITE; PYRITE AT 121CM, 143 CM; Leg : 64 Top/Bottom Interval(mm): 0/1500 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 459.50 Core: 54 Top of Core Depth (m) : 455.00 Sect: 3 Top of Section Depth(m): 458.00 LITHOLOGY: APHYRIC BASALT; Piece No. : PCES 1A (0-34), 1B (30-41), 1C (39-53), 1D (50-65), 1E (65-93), 1F (90-141), 1G (139-150); Texture : MEDIUM-GRAINED APHYRIC BASALT,GRAINSIZE <2MM & GENERALLY 0.5-1MM,COARSER-GRAINED AREA OCCURS IN PCE 1G(PROBABLY ALTERATION PROCESS); Structure : OCCASIONAL VEINS CONTAIN CALCITE & SEVERAL FRACTURES ARE COATED WITH PYR; Alteration : MOD LIGHT COLORATION POSSIBLY DUE TO ALTERATION,COARSE -GRAINED AREA IN PCE 1G MAY BE DUE TO ALTERATION; Comments : MEDIUM-LIGHT GRAY(N6); Groundmass : FELDSPAR WHITE,OPAQUE; MAFICS ALTERED; Replacement: CALCITE IN FRACTURES & IN MATRIX; CALCITE Leg : 64 Top/Bottom Interval(mm): 0/1100 Analyst: Saunders, A. Hole: 478 Sample Midpoint (m) : 460.60 Core: 54 Top of Core Depth (m) : 455.00 Sect: 4 Top of Section Depth(m): 459.50 LITHOLOGY: APHYRIC BASALT; Piece No. : PCE 1A (0-45), 1B (43-75), 1C (75-93), 1D (93-100), 1E (98-104), 1F (104-110); Texture : APHYRIC, MEDIUM-GRAINED, BECOMES MORE MAFIC TOWARD BASE OF SECTION (N5/N6 AT TOP, N4 AT BOTTOM), TEXTURALLY AND MINERALOGICALLY VERY SIMILAR TO SECTION 1; Alteration : MOD; Comments : MEDIUM GRAY (N5), CONTINUATION OF SECTION 3; Replacement: CALCITE PYRITE |
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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