NOAA logo, National Centers for Environmental Information, National Oceanic and Atmospheric Administration NSF logo, National Science Foundation, Division of Ocean Sciences

Core Data from the Deep Sea Drilling Project


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;


    

Introduction


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]

These Web pages are from the Core Data from the Deep Sea Drilling Project Legs 1-96 CD-ROM produced in 1989 and modified in 2000 by the U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Environmental Satellite, Data, and Information Service, National Geophysical Data Center (now part of the National Centers for Environmental Information), and collocated World Data Center for Marine Geology and Geophysics, Boulder (now part of the World Data Service for Geophysics). Data were compiled in cooperation with the U.S. Science Support Program, of the Joint Oceanographic Institutions, Inc. (now the Consortium for Ocean Leadership), and the U.S. National Science Foundation.

Please see NOAA's privacy and disclaimer information. Send questions or comments to mgg.info@noaa.gov.

Department of Commerce > NOAA > NESDIS > NCEI > doi:10.7289/V54M92G2