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Core Data from the Deep Sea Drilling Project


Leg : 63    Top/Bottom Interval(mm):  170/ 190  Describer: Shibata, T.
Hole: 473   Top of Core Depth(m)   :   247.50   Rock Type: IGNEOUS
Core:  29   Sample Midpoint(m)     :   247.68   Sect/Pc #:  1/PCE 1C

ROCK = PLAG-CPX MODERATELY PHYRIC BASALT;
       Texture: MODERATELY PORPHYRITIC,GLOMEROPORPHYRITIC,
       INTERSERTAL-SUBVARIOLITIC GROUNDMASS*

Phenocrysts- OLIVINE                   (   TR%)
             Size(mm):        0.7  Morphology: EUHEDRAL
             PSEUDOMORPHS?,COMPLETELY ALTERED TO CLAYS +
             CALCITE;

             PLAGIOCLASE               (    5%)
             Size(mm):    0.2-1.0  Morphology: EUHEDRAL-SUBHEDRAL
             PHENOS + MICROPHENOS;

             CLINOPYROXENE             (    2%)
             Size(mm):    0.1-0.7  Morphology: SUBHEDRAL-EQUANT
             PHENOS + MICROPHENOS*

Groundmass - PLAGIOCLASE               (   30%)
             Size(mm):   0.05-0.1  Morphology: PRISMATIC LATHS,RADIATING

             Morphology: LATHS

             CLINOPYROXENE             (   10%)
             Size(mm):   0.05-0.1  Morphology: ANHEDRAL,EQUANT

             OPAQUE MINERALS           (   10%)
             Size(mm):  0.01-0.05  Morphology: ANHEDRAL

             MESOSTASIS

Alteration - CALCITE                   (    2%)
             Location: VESICLES       Replacing: OL PHENOS

             CLAY MINERALS             (   37%)
             Location: VESICLES,      Replacing: OL PHENOS
             Location: MESOSTASIS

Vesicles   -
             Size(mm):  0.2-0.7
             Percent:     4
             Filling: CLAY.MIN,
             Shape: CIRCULAR-

             Filling: CALCITE
             Shape: IRREGULAR
             CLAY IS BROWNISH*




Leg : 63    Top/Bottom Interval(mm):  880/ 920  Describer: Shibata, T.
Hole: 473   Top of Core Depth(m)   :   247.50   Rock Type: IGNEOUS
Core:  29   Sample Midpoint(m)     :   248.40   Sect/Pc #:  1/PCE 6D

ROCK = DOLERITE;
       Texture: INTERGRANULAR-INTERSERTAL*

Groundmass - OLIVINE                   (    1%)
             Size(mm):    0.5-1.0  Morphology: SUBHEDRAL
             PSEUDOMORPHS,COMPLETELY ALTERED TO CLAY + CALCITE*

             PLAGIOCLASE               (   40%)
             Size(mm):    0.1-1.5  Morphology: SUBHEDRAL LATHS

             CLINOPYROXENE             (   25%)
             Size(mm):   0.05-0.7  Morphology: ANHEDRAL-EQUANT

             OPAQUE MINERALS           (    7%)
             Size(mm):   0.05-0.2  Morphology: ANHEDRAL,IRREGULAR

             MESOSTASIS

Alteration - CARBONATE                 (    3%)
             Location: VESICLES       Replacing: OL

             CLAY MINERALS             (   22%)
             Location: VESICLES,      Replacing: OL
             Location: MESOSTASIS
             IN THE INTERSTICES BETWEEN PLAG AND CPX*

Vesicles   -
             Size(mm):      0.8
             Percent:     2
             Filling: CLAY.MIN
             Shape: CIRCULAR
             CLAY IS BROWN*




Leg : 63    Top/Bottom Interval(mm):  590/ 620  Describer: Shibata, T.
Hole: 473   Top of Core Depth(m)   :   252.00   Rock Type: IGNEOUS
Core:  30   Sample Midpoint(m)     :   252.61   Sect/Pc #:  1/PCE 3F

ROCK = DOLERITE;
       Texture: INTERSERTAL-SUBOPHITIC*

Groundmass - OLIVINE
             PSEUDOMORPHS?;

             PLAGIOCLASE               (   40%)
             Size(mm):      0.1-2  Morphology: SUBHEDRAL-ANHEDRAL

             OPAQUE MINERALS           (    7%)
             Size(mm):   0.05-0.2  Morphology: ANHEDRAL

             CLINOPYROXENE             (   39%)
             Size(mm):      0.1-1  Morphology: ANHEDRAL

Alteration - CARBONATE                 (    4%)
             IN THE INTERSTICES BETWEEN PLAG AND CPX;

             CLAY MINERALS             (   10%)
             IN THE INTERSTICES BETWEEN PLAG AND CPX;

             ZEOLITE                   (   TR%)
             IN THE INTERSTICES BETWEEN PLAG AND CPX*




Leg : 63    Top/Bottom Interval(mm):   30/  60  Describer: Shibata, T.
Hole: 473   Top of Core Depth(m)   :   252.00   Rock Type: IGNEOUS
Core:  30   Sample Midpoint(m)     :   253.55   Sect/Pc #:  2/PCE 1A

ROCK = DOLERITE;
       Texture: APHYRIC,INTERGRANULAR-INTERSERTAL*

Groundmass - PLAGIOCLASE               (   20%)
             Size(mm):      0.1-2  Morphology: SUBHEDRAL

             CLINOPYROXENE             (   20%)
             Size(mm):    0.1-0.5  Morphology: ANHEDRAL,EQUANT

             OPAQUE MINERALS           (    5%)
             Size(mm):   0.05-0.2  Morphology: ANHEDRAL

Alteration - CARBONATE                 (   10%)
             Location: VEIN

             CLAY MINERALS             (   15%)
             IN THE INTERSTICES BETWEEN PLAG AND CPX;

             QUARTZ                    (   30%)
             Location: VEIN




Leg : 63    Top/Bottom Interval(mm): 1160/1200  Describer: Shibata, T.
Hole: 473   Top of Core Depth(m)   :   257.00   Rock Type: IGNEOUS
Core:  31   Sample Midpoint(m)     :   259.68   Sect/Pc #:  2/PCE 9D

ROCK = DOLERITE;
       Texture: APHYRIC,INTERSERTAL-SUBOPHITIC*

Groundmass - OLIVINE
             PSEUDOMORPHS?;

             PLAGIOCLASE               (   39%)
             Size(mm):    0.1-2.0  Morphology: SUBHEDRAL-ANHEDRAL

             CLINOPYROXENE             (   38%)
             Size(mm):    0.1-1.0  Morphology: ANHEDRAL

             OPAQUE MINERALS           (    8%)
             Size(mm):   0.05-0.2  Morphology: ANHEDRAL

Alteration - CARBONATE                 (   TR%)

             CLAY MINERALS             (   15%)
             IN THE INTERSTICES BETWEEN PLAG AND PYX;

             ZEOLITE                   (   TR%)
             IN THE INTERSTICES BETWEEN PLAG AND PYX;

             SERPENTINITE              (   TR%)
             IN THE INTERSTICES BETWEEN PLAG AND PYX*




Leg : 63    Top/Bottom Interval(mm):   20/  40  Describer: Shibata, T.
Hole: 473   Top of Core Depth(m)   :   266.00   Rock Type: IGNEOUS
Core:  32   Sample Midpoint(m)     :   270.53   Sect/Pc #:  4/PCE 1A

ROCK = DOLERITE;
       Texture: APHYRIC,INTERSERTAL-INTERGRANULAR*

Groundmass - OLIVINE
             PSEUDOMORPHS?;

             PLAGIOCLASE               (   39%)
             Size(mm):      0.1-2  Morphology: SUBHEDRAL-ANHEDRAL

             CLINOPYROXENE             (   38%)
             Size(mm):    0.1-1.5  Morphology: ANHEDRAL

             OPAQUE MINERALS           (    8%)
             Size(mm):   0.05-0.5  Morphology: ANHEDRAL

Alteration - CARBONATE                 (   TR%)
             IN THE INTERSTICES BETWEEN PLAG AND PYX;

             CLAY MINERALS             (   15%)
             IN THE INTERSTICES BETWEEN PLAG AND PYX*




Leg : 63    Top/Bottom Interval(mm): 1210/1230  Describer: Shibata, T.
Hole: 473   Top of Core Depth(m)   :   275.00   Rock Type: IGNEOUS
Core:  33   Sample Midpoint(m)     :   276.22   Sect/Pc #:  1/PCE 2G

ROCK = DOLERITE;
       Texture: APHYRIC,INTERSERTAL-SUBOPHITIC*

Groundmass - PLAGIOCLASE               (   39%)
             Size(mm):      0.1-2  Morphology: SUBHEDRAL-ANHEDRAL

             CLINOPYROXENE             (   38%)
             Size(mm):      0.1-2  Morphology: SUBHEDRAL-ANHEDRAL

             OPAQUE MINERALS           (    8%)
             Size(mm):   0.05-0.3  Morphology: ANHEDRAL

Alteration - CARBONATE                 (   TR%)
             IN THE INTERSTICES BETWEEN PLAG AND PYX;

             CLAY MINERALS             (   15%)
             IN THE INTERSTICES BETWEEN PLAG AND PYX*




Leg : 63    Top/Bottom Interval(mm):  270/ 290  Describer: Shibata, T.
Hole: 473   Top of Core Depth(m)   :   284.00   Rock Type: IGNEOUS
Core:  34   Sample Midpoint(m)     :   287.28   Sect/Pc #:  3/PCE 2

ROCK = PLAG MODERATELY PHYRIC BASALT;
       Texture: MODERATELY PORPHYRITIC,GLOMEROPORPHYRITIC,
       HYALOPILITIC*

Phenocrysts- OLIVINE                   (   TR%)
             Size(mm):        0.5
             PSEUDOMORPHS,COMPLETELY ALTERED TO CLAYS;

             PLAGIOCLASE               (    7%)
             Size(mm):      0.2-1  Morphology: EUHEDRAL
             BOTH PHENOS + MICROPHENOS;

             CLINOPYROXENE             (    5%)
             Size(mm):    0.1-0.5  Morphology: EUHEDRAL-SUBHEDRAL
             MOSTLY MICROPHENOS*

Groundmass - PLAGIOCLASE               (   10%)
             Size(mm):  0.01-0.05  Morphology: SKELETAL

             CLINOPYROXENE             (    5%)
             Size(mm):  0.01-0.05  Morphology: FEATHERY,SKELETAL

             GLASS                     (   55%)
             DEVITRIFIED;

             OPAQUE MINERALS           (    8%)
             Size(mm):       0.01  Morphology: ANHEDRAL

Alteration - CLAY MINERALS             (    9%)
             Location: VESICLES       Replacing: OL PHENOS

             ZEOLITE                   (    1%)
             Location: VESICLES

Vesicles   -
             Size(mm):    0.1-2
             Percent:    10
             Filling: CLAY.MIN,
             Shape: OVAL

             Filling: ZEOLITE




    

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.

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