Core Data from the Deep Sea Drilling Project

Leg : 63    Top/Bottom Interval(mm):    0/   0  Describer: Shibata, T.
Hole: 468   Top of Core Depth(m)   :   136.50   Rock Type: IGNEOUS
Core:  16   Sample Midpoint(m)     :   136.60   Sect/Pc #: CC/

ROCK = PLAG-CPX MODERATELY MICROPHYRIC ANDESITE
       PETROGRAPHER GAVE ROCK TYPE "PYROXENE ANDESITE";
       Texture: MODERATELY MICROPHYRIC,GLOMEROPORPHYRITIC*

Phenocrysts- PLAGIOCLASE               (    4%)
             Size(mm):    0.2-0.5  Morphology: EUHEDRAL-SUBHEDRAL
             MICROPHENOS,LABRADORITE;

             CLINOPYROXENE             (    1%)
             Size(mm):    0.2-0.5  Morphology: EUHEDRAL-SUBHEDRAL
             MICROPHENOS;

             ORTHOPYROXENE             (   TR%)
             Size(mm):        0.3  Morphology: EUHEDRAL-SUBHEDRAL
             MICROPHENOS*

Groundmass - PLAGIOCLASE               (   40%)
             Size(mm):   0.05-0.1  Morphology: ACICULAR PRISMS

             GLASS                     (   42%)
             ALTERED MESOSTASIS;

             OPAQUE MINERALS           (    3%)
             ORE MINS*

Alteration - CLAY MINERALS             (   TR%)
             Location: VESICLE
             FOUND ON RIM OF VESICLE;

             ZEOLITE                   (   TR%)

Vesicles   -
             Size(mm):  0.2-1.5
             Percent:    10




Leg : 63    Top/Bottom Interval(mm):    0/   0  Describer: Shibata, T.
Hole: 468   Top of Core Depth(m)   :   193.50   Rock Type: IGNEOUS
Core:  22   Sample Midpoint(m)     :   193.60   Sect/Pc #: CC/

ROCK = PLAG-CPX-OPX MODERATELY MICROPHYRIC ANDESITE
       PETROGRAPHER GAVE ROCK TYPE "PYROXENE ANDESITE";
       Texture: MODERATELY MICROPHYRIC,GLOMEROPORPHYRITIC*

Phenocrysts- PLAGIOCLASE               (    4%)
             Size(mm):    0.2-0.5  Morphology: EUHEDRAL-SUBHEDRAL
             MICROPHENOS,LABRADORITE;

             CLINOPYROXENE             (    2%)
             Size(mm):    0.2-0.5  Morphology: EUHEDRAL-SUBHEDRAL
             MICROPHENOS,ZONED PYX;

             ORTHOPYROXENE             (    1%)
             Size(mm):        0.3  Morphology: EUHEDRAL-SUBHEDRAL
             MICROPHENOS,FRINGED BY A THIN RIM OF PYX WITH A
             DIFFERENT OPTICAL ORIENTATION*

Groundmass - PLAGIOCLASE               (   30%)
             Size(mm):       <0.1  Morphology: PRISMATIC

             CLINOPYROXENE             (   TR%)
             Size(mm):       <0.1  Morphology: ANHEDRAL

             GLASS                     (   28%)

             OPAQUE MINERALS           (   20%)
             Size(mm):       <0.1  Morphology: ANHEDRAL
             ORE MINS*

Alteration - CLAY MINERALS
             QUESTIONABLE;

             ZEOLITE                   (   TR%)

Vesicles   -
             Size(mm):      1-5
             Percent:    15




Leg : 63    Top/Bottom Interval(mm):   70/  90  Describer: Shibata, T.
Hole: 468   Top of Core Depth(m)   :   222.00   Rock Type: IGNEOUS
Core:  25   Sample Midpoint(m)     :   222.08   Sect/Pc #: CC/

ROCK = APHYRIC ANDESITE
       Texture: APHYRIC,HYALOPILITIC*

Groundmass - PLAGIOCLASE               (    7%)
             Size(mm):    0.1-0.3  Morphology: ACICULAR PRISMS,SKELETAL
             QUENCH;

             CLINOPYROXENE             (   TR%)
             Morphology: FEATHERY
             QUENCH;

             GLASS                     (   82%)
             DEVITRIFIED;

             OPAQUE MINERALS           (   <1%)

Alteration - CLAY MINERALS             (   TR%)

Vesicles   -
             Size(mm):  0.1-3.0
             Percent:    10

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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