Core Data from the Deep Sea Drilling Project

Leg : 63    Top/Bottom Interval(mm): 1330/1350  Describer: Shibata, T.
Hole: 470A  Top of Core Depth(m)   :   166.50   Rock Type: IGNEOUS
Core:   7   Sample Midpoint(m)     :   169.34   Sect/Pc #:  2/PCE 4G

ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
       Texture: MODERATELY PORPHYRITIC,INTERGRANULAR-SUBOPHITIC
       GROUNDMASS;
       Where sampled: PILLOW INTERIOR*

Phenocrysts- OLIVINE                   (    4%)
             Size(mm):    0.5-1.0  Morphology: EUHEDRAL
             PARTLY OR COMPLETELY ALTERED;

             PLAGIOCLASE               (    4%)
             Size(mm):    0.5-2.0  Morphology: EUHEDRAL-SUBHEDRAL

             SPINEL                    (   TR%)
             Size(mm):        0.1  Morphology: EUHEDRAL

Groundmass - OLIVINE                   (    2%)
             Size(mm):   0.05-0.2  Morphology: PRISMATIC-ANHEDRAL,EQUANT

             PLAGIOCLASE               (   40%)
             Size(mm):   0.05-0.3  Morphology: ACICULAR PRISMS

             CLINOPYROXENE             (   42%)
             Size(mm):    0.1-0.5  Morphology: ANHEDRAL

             OPAQUE MINERALS           (    6%)
             Morphology: NEEDLES

Alteration - CARBONATE
             Replacing: OL

             CLAY MINERALS
             Location: VESICLES,      Replacing: OL
             Location: CRACKS
             BROWN*

Vesicles   -
             Size(mm):  0.2-0.3
             Percent:     2
             Filling: CLAY.MIN
             Shape: CIRCULAR
             FILLING IS BROWN CLAY*




Leg : 63    Top/Bottom Interval(mm): 1330/1340  Describer: Shibata, T.
Hole: 470A  Top of Core Depth(m)   :   166.50   Rock Type: IGNEOUS
Core:   7   Sample Midpoint(m)     :   170.84   Sect/Pc #:  3/PCE 6

ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
       Texture: MODERATELY PORPHYRITIC,SUBVARIOLITIC GROUNDMASS;
       Where sampled: NEXT TO GLASSY MARGIN*

Phenocrysts- OLIVINE                   (   TR%)
             Size(mm):        0.5  Morphology: EUHEDRAL
             PSEUDOMORPHS--COMPLETELY ALTERED;

             PLAGIOCLASE               (    2%)
             Size(mm):        0.5  Morphology: EUHEDRAL

Groundmass - OLIVINE                   (    4%)
             Size(mm):  0.01-0.05  Morphology: EQUANT-EUHEDRAL

             PLAGIOCLASE               (   40%)
             Size(mm):   0.05-0.1  Morphology: SKELETAL,HOLLOW,ACICULAR

             CLINOPYROXENE             (   40%)
             Size(mm):   0.01-0.1  Morphology: FEATHERY,DENDRITIC

             OPAQUE MINERALS           (    5%)

             MICROCRYST GROUNDMASS     (    9%)

Alteration - CARBONATE
             Location: VESICLES       Replacing: OL
             CALCITE IN VESICLES;

             CLAY MINERALS
             Location: VESICLES,      Replacing: OL
             Location: CRACKS

Vesicles   -
             Size(mm):      0.2
             Percent:    TR
             Filling: CALCITE,
             Shape: CIRCULAR

             Filling: CLAY.MIN




Leg : 63    Top/Bottom Interval(mm):  690/ 710  Describer: Shibata, T.
Hole: 470A  Top of Core Depth(m)   :   171.00   Rock Type: IGNEOUS
Core:   8   Sample Midpoint(m)     :   171.70   Sect/Pc #:  1/PCE 3C

ROCK = PLAG SPARSELY PHYRIC BASALT;
       Texture: SPARSELY PORPHYRITIC,GLOMEROPORPHYRITIC,
       INTERGRANULAR GROUNDMASS;
       Where sampled: PILLOW INTERIOR*

Phenocrysts- PLAGIOCLASE               (    2%)
             Size(mm):    0.3-1.0  Morphology: EUHEDRAL
             PHENOS AND MICROPHENOS*

Groundmass - OLIVINE                   (    3%)
             Size(mm):  0.05-0.08  Morphology: ANHEDRAL,EQUANT

             PLAGIOCLASE               (   42%)
             Size(mm):   0.03-0.2  Morphology: SKELETAL,HOLLOW

             CLINOPYROXENE             (   42%)
             Size(mm):   0.05-0.2  Morphology: FEATHERY,DENDRITIC

             OPAQUE MINERAL            (   10%)
             Size(mm):  0.01-0.05  Morphology: SKELETAL-EQUANT

Alteration - CARBONATE
             Location: VEIN

             CLAY MINERALS
             Location: VESICLES,OL

Vesicles   -
             Size(mm):      0.2
             Percent:     1
             Filling: CLAY.MIN
             Shape: CIRCULAR
             FILLING IS BROWNISH GREEN CLAY*




Leg : 63    Top/Bottom Interval(mm):  950/ 980  Describer: Shibata, T.
Hole: 470A  Top of Core Depth(m)   :   171.00   Rock Type: IGNEOUS
Core:   8   Sample Midpoint(m)     :   174.97   Sect/Pc #:  3/PCE 3C

ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
       Texture: MODERATELY PORPHYRITIC,INTERSERTAL,INTERGRANULAR
       GROUNDMASS;
       Where sampled: NEXT TO GLASSY MARGIN*

Phenocrysts- OLIVINE                   (    1%)
             Size(mm):          1  Morphology: EUHEDRAL
             COMPLETELY ALTERED--PSEUDOMORPHS*

             PLAGIOCLASE               (    2%)
             Size(mm):      0.5-1  Morphology: EUHEDRAL

Groundmass - OLIVINE                   (    2%)
             Size(mm):   0.05-0.2  Morphology: EUHEDRAL-EQUANT

             PLAGIOCLASE               (   38%)
             Size(mm):   0.05-0.3  Morphology: SKELETAL

             CLINOPYROXENE             (   40%)
             Size(mm):   0.03-0.3  Morphology: SKELETAL-FEATHERY

             OPAQUE MINERALS           (    5%)

             MICROCRYST GROUNDMASS     (    9%)

Alteration - CARBONATE
             Location: VEINS

             CLAY MINERALS
             Location: VESICLES       Replacing: OL
             ALSO FOUND IN THE INTERSTICES BETWEEN PLAG LATHS*

Vesicles   -
             Size(mm):  0.2-0.4
             Percent:     3
             Filling: CLAY.MIN
             Shape: CIRCULAR
             FILLING IS GREEN CLAY*




Leg : 63    Top/Bottom Interval(mm):  650/ 680  Describer: Shibata, T.
Hole: 470A  Top of Core Depth(m)   :   180.50   Rock Type: IGNEOUS
Core:   9   Sample Midpoint(m)     :   182.67   Sect/Pc #:  2/PCE 3E

ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
       Texture: MODERATELY PORPHYRITIC,INTERGRANULAR-INTERSERTAL
       GROUNDMASS;
       Where sampled: NEXT TO GLASSY MARGIN*

Phenocrysts- OLIVINE                   (    1%)
             Size(mm):        0.5  Morphology: EUHEDRAL
             PARTLY ALTERED;

             PLAGIOCLASE               (    2%)
             Size(mm):      0.5-1  Morphology: EUHEDRAL

Groundmass - OLIVINE                   (    3%)
             Size(mm):   0.05-0.1  Morphology: EUHEDRAL,

             Morphology: EQUANT-SLENDER PRISMATIC

             PLAGIOCLASE               (   34%)
             Size(mm):   0.05-0.3  Morphology: SKELETAL

             CLINOPYROXENE             (   35%)
             Size(mm):   0.03-0.2  Morphology: SKELETAL,FEATHERY,DENDRITIC

             OPAQUE MINERALS           (    7%)

             MICROCRYST GROUNDMASS     (   15%)

Alteration - CLAY MINERALS
             Location: VESICLES,
             Location: CRACKS
             ALSO FOUND IN THE INTERSTICES BETWEEN PLAG LATHS
             AND PYROXENES*

Vesicles   -
             Size(mm):  0.2-0.4
             Percent:     3
             Filling: CLAY.MIN
             Shape: CIRCULAR
             FILLING IS BROWN CLAY*




Leg : 63    Top/Bottom Interval(mm):  340/ 360  Describer: Shibata, T.
Hole: 470A  Top of Core Depth(m)   :   180.50   Rock Type: IGNEOUS
Core:   9   Sample Midpoint(m)     :   185.35   Sect/Pc #:  4/PCE 1B

ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
       Texture: MODERATELY PORPHYRITIC,GLOMEROPORPHYRITIC,
       INTERGRANULAR-SUBOPHITIC GROUNDMASS*

Phenocrysts- OLIVINE                   (    1%)
             Size(mm):      0.5-1  Morphology: EUHEDRAL
             PARTLY ALTERED;

             PLAGIOCLASE               (    3%)
             Size(mm):      0.5-2  Morphology: EUHEDRAL

Groundmass - OLIVINE                   (    5%)
             Size(mm):   0.03-0.2  Morphology: PRISMATIC-ANHEDRAL EQUANT

             PLAGIOCLASE               (   41%)
             Size(mm):    0.1-0.5  Morphology: SLENDER LATHS

             CLINOPYROXENE             (   40%)
             Size(mm):     0.05-1  Morphology: ANHEDRAL

             OPAQUE MINERALS           (    8%)
             Size(mm):   0.05-0.1

Alteration - CLAY MINERALS
             Location: VESICLES       Replacing: OL
             ALSO FOUND IN THE INTERSTICES BETWEEN PLAG LATHS
             AND CLINOPYROXENES*

Vesicles   -
             Size(mm):  0.2-0.4
             Percent:     2
             Filling: CLAY.MIN
             Shape: CIRCULAR
             FILLING IS BROWN CLAY*




Leg : 63    Top/Bottom Interval(mm):  750/ 800  Describer: Shibata, T.
Hole: 470A  Top of Core Depth(m)   :   189.50   Rock Type: IGNEOUS
Core:  10   Sample Midpoint(m)     :   190.28   Sect/Pc #:  1/PCE 8B

ROCK = PLAG MODERATELY PHYRIC BASALT;
       Texture: MODERATELY PORPHYRITIC,GLOMEROPORPHYRITIC,
       INTERGRANULAR-SUBOPHITIC GROUNDMASS*

Phenocrysts- OLIVINE                   (   TR%)
             Size(mm):      0.5-1  Morphology: EUHEDRAL
             PARTLY ALTERED;

             PLAGIOCLASE               (    3%)
             Size(mm):    0.5-1.5  Morphology: EUHEDRAL

Groundmass - OLIVINE                   (    4%)
             Size(mm):   0.03-0.2  Morphology: PRISMATIC-ANHEDRAL,EQUANT

             PLAGIOCLASE               (   41%)
             Size(mm):    0.1-0.5  Morphology: SLENDER LATHS

             CLINOPYROXENE             (   43%)
             Size(mm):     0.05-1  Morphology: ANHEDRAL

             OPAQUE MINERALS           (    6%)
             Size(mm):   0.05-0.1

Alteration - CLAY MINERALS
             Location: VESICLES       Replacing: OL
             ALSO FOUND IN THE INTERSTICES BETWEEN PLAG LATHS
             AND CLINOPYROXENES*

Vesicles   -
             Size(mm):  0.2-0.4
             Percent:     3
             Filling: CLAY.MIN
             Shape: CIRCULAR
             FILLING IS BROWN CLAY*




Leg : 63    Top/Bottom Interval(mm):  340/ 370  Describer: Shibata, T.
Hole: 470A  Top of Core Depth(m)   :   194.50   Rock Type: IGNEOUS
Core:  11   Sample Midpoint(m)     :   194.86   Sect/Pc #:  1/PCE 4B

ROCK = PLAG MODERATELY PHYRIC BASALT;
       Texture: MODERATELY PORPHYRITIC,INTERSERTAL GROUNDMASS*

Phenocrysts- PLAGIOCLASE               (    2%)
             Size(mm):      0.5-1  Morphology: EUHEDRAL

Groundmass - PLAGIOCLASE               (   36%)
             Size(mm):   0.03-0.1  Morphology: SKELETAL NEEDLES

             CLINOPYROXENE             (   35%)
             Size(mm):   0.03-0.1  Morphology: FEATHERY,ANHEDRAL

             OPAQUE MINERALS           (   15%)
             Size(mm): 0.005-0.01

             MICROCRYST GROUNDMASS     (    7%)
             DEVITRIFIED GLASS*

Vesicles   -
             Size(mm):      0.1
             Percent:     5
             Filling: VOID
             Shape: CIRCULAR




Leg : 63    Top/Bottom Interval(mm):  350/ 360  Describer: Shibata, T.
Hole: 470A  Top of Core Depth(m)   :   198.50   Rock Type: IGNEOUS
Core:  12   Sample Midpoint(m)     :   198.86   Sect/Pc #:  1/PCE 3D

ROCK = APHYRIC BASALT
       ALTERED;
       Texture: APHYRIC,HYPOCRYSTALLINE,SUBVARIOLITIC;
       Where sampled: NEXT TO GLASSY MARGIN*

Groundmass - PLAGIOCLASE               (   15%)
             Size(mm):   0.01-0.1  Morphology: SKELETAL,NEEDLES

             CLINOPYROXENE             (   10%)
             Size(mm):   0.01-0.1  Morphology: SKELETAL,FEATHERY

             OPAQUE MINERALS           (    5%)

             GLASS                     (   70%)
             DEVITRIFIED OR ALTERED GLASS*

Alteration - CARBONATE
             Location: VESICLES

             CLAY MINERALS
             Location: MATRIX

             ZEOLITE
             Location: VESICLES

Vesicles   -
             Size(mm):  0.3-0.5
             Percent:     5
             Filling: ZEOLITE
             Shape: IRREGULAR-

             Shape: CIRCULAR
             ONLY SOME FILLED BY ZEOLITE*




Leg : 63    Top/Bottom Interval(mm):  300/ 320  Describer: Shibata, T.
Hole: 470A  Top of Core Depth(m)   :   207.50   Rock Type: IGNEOUS
Core:  13   Sample Midpoint(m)     :   207.81   Sect/Pc #:  1/PCE 4

ROCK = APHYRIC BASALT;
       Texture: APHYRIC,SUBOPHITIC,INTERSERTAL*

Groundmass - OLIVINE                   (    3%)
             Size(mm):   0.05-0.1  Morphology: ANHEDRAL,EQUANT
             PARTLY ALTERED;

             PLAGIOCLASE               (   41%)
             Size(mm):      0.1-1  Morphology: PRISMATIC,LATHS

             CLINOPYROXENE             (   40%)
             Size(mm):      0.1-2  Morphology: ANHEDRAL
             2VZ 35-45;

             OPAQUE MINERALS           (    8%)
             Size(mm):   0.01-0.1  Morphology: ACICULAR

             MICROCRYST GROUNDMASS     (    8%)

Alteration - CLAY MINERALS
             Replacing: OL
             ALSO FOUND IN THE INTERSTICES BETWEEN PLAG LATHS
             AND CLINOPYROXENES*




Leg : 63    Top/Bottom Interval(mm):  670/ 690  Describer: Shibata, T.
Hole: 470A  Top of Core Depth(m)   :   207.50   Rock Type: IGNEOUS
Core:  13   Sample Midpoint(m)     :   208.18   Sect/Pc #:  1/PCE 8

ROCK = APHYRIC BASALT;
       Texture: APHYRIC,INTERGRANULAR-INTERSERTAL MATRIX*

Phenocrysts- PLAGIOCLASE               (    3%)
             Size(mm):    0.2-0.4  Morphology: EUHEDRAL
             MICROPHENOS*

Groundmass - PLAGIOCLASE               (   37%)
             Size(mm):   0.01-0.1  Morphology: PRISMATIC,SLENDER LATHS

             CLINOPYROXENE             (   40%)
             Size(mm):   0.01-0.1  Morphology: ANHEDRAL,EQUANT

             OPAQUE MINERALS           (   10%)
             Size(mm):  0.01-0.03

             MICROCRYST GROUNDMASS     (    7%)

Alteration - CLAY MINERALS
             Location: VESICLES,
             Location: MATRIX

Vesicles   -
             Size(mm):  0.2-0.3
             Percent:     3
             Filling: CLAY.MIN
             Shape: CIRCULAR
             FILLING IS BROWNISH GREEN CLAY*
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