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Core Data from the Deep Sea Drilling Project


Leg :  7    Top/Bottom Interval(mm):  320/   0  Describer: Heath, R.
Hole:  63   Top of Core Depth(m)   :   561.00   Rock Type: IGNEOUS
Core:  10   Sample Midpoint(m)     :   561.32   Sect/Pc #:  1/

ROCK = BASALT
       DARK GRAY BASALT IRREGULARLY IN CONTACT WITH WHITE
       CHALK,CHALK CONTAINS 1-5MM ANGULAR CHIPS OF
       BASALT,CHALK INFO IN SMEAR SLIDE DATA BASE;
       Texture: PHYRIC*

Groundmass - PLAGIOCLASE
             Size(mm):       TO 1  Morphology: LATHS+MOSAICS
             LOCALLY ANTIPERTHITIC WITH IRREGULARLY INTERGROWN
             MOSAICS;

             PYROXENE
             NOW PSEUDOMORPHIC CHLORITE MASSES,BASALT WAS
             PROBABLY ORIGINALLY SPHERULITIC GLASS-IT HAS
             ALTERED TO PALE GREEN CHLORITE AND MONTMORILLONITE
             WHICH PRESERVE THE ORIGINAL TEXTURE,THE CONTACT
             BETWEEN BASALT AND LIMESTONE IS HIGHLY IRREGULAR-
             ALMOST STYLOLITIC AND IS MARKED BY A .05-.2MM
             RIM OF IRON(?)-MANGANESE OXIDES UNDERLAIN(IN THE
             BASALT) BY A .5MM CHLORITE LAYER,IN PLACES
             CALCAREOUS GRAINS HAVE "LEAKED" INTO THE BASALT*

Alteration - CHLORITE
             Location: BASALT,        Replacing: PYX
             Location: BASALT/CHALK
             Location: CONTACT




Leg :  7    Top/Bottom Interval(mm):  380/   0  Describer: Heath, R.
Hole:  63   Top of Core Depth(m)   :   561.00   Rock Type: IGNEOUS
Core:  10   Sample Midpoint(m)     :   561.38   Sect/Pc #:  1/

ROCK = PLAG PHYRIC BASALT;
       Texture: PHYRIC*

Phenocrysts- PLAGIOCLASE
             Size(mm):        1-2
             TWINNED,COMPLEXLY INTERGROWN AND SHOW CONSIDERABLE
             UNMIXING,PARTIAL ALTERATION TO MONTMORILLONITE?
             (USUALLY CRYSTALLOGRAPHICALLY CONTROLLED)IS
             COMMON*

Groundmass - PLAGIOCLASE
             Size(mm):        1-5  Morphology: LATHS,PRISMS,MOSAICS
             SOMEWHAT ALTERED,APPROX COMP AN60-70 BY MICHEL-
             LEVY METHOD;

             PYROXENE
             Morphology: SUBHEDRAL
             HIGH 2V,ALMOST COLORLESS,NO PLEOCHROISM,GROUNDMASS
             DOMINATED BY .1-.15MM CHLORITE XTLS,FE-OXIDES WITH
             LESSER PLAG LATHS AND .05MM BLEBS OF PALE GREEN
             MONTMORILLONITE?*

Alteration - CHLORITE
             Location: GROUNDMASS
             PINNATE BROWN;

             FERROUS OXIDE
             Location: GROUNDMASS
             FINE;

             MONTMORILLONITE
             Location: GROUNDMASS




Leg :  7    Top/Bottom Interval(mm):  680/   0  Describer: Heath, R.
Hole:  63   Top of Core Depth(m)   :   561.00   Rock Type: IGNEOUS
Core:  10   Sample Midpoint(m)     :   561.68   Sect/Pc #:  1/

ROCK = BASALT
       PALE GREEN AND RED MASSIVE MATERIAL IN IRREGULAR
       CONTACT WITH DARK GRAY BASALT,LIMESTONE INFO
       IN SMEAR SLIDE DATA BASE*

Groundmass - PLAGIOCLASE
             Morphology: LATHS
             SCATTERED IN A SOMEWHAT PERLITIC GROUNDMASS OF
             ALTERED GLASS(LOCALLY VARIOLITIC);

             GLASS
             ALTERED BUT STILL ALMOST ISOTROPIC.THE CONTACT IS
             MARKED BY A .2MM ZONE OF VERMIFORM CHLORITE
             ACICULAR MASSES,BY AN IRON(?)-MANGANESE FILM UP TO
             .04MM THICK BY REXTLLIZED CALCITE WITHIN .1MM OF
             THE CONTACT AND BY A PATCH OF .04MM SCAPOLITE
             PRISMS SURROUNDED BY BRILLIANT BLUE-GREEN
             RADIATING ACICULAR CHLORITE? XTLS GRADING OUT
             (AFTER .03MM) TO COLORLESS CHLORITE? OR
             MONTMORILLONITE ACICULAR MASSES THEN TO PALE BROWN
             VARIOLITES(?),THE SCAPOLITE APPEARS TO BE ALTERED
             AT LEAST IN PART TO MONTMORILLONITE?*




Leg :  7    Top/Bottom Interval(mm): 1230/1250  Describer: Heath, R.
Hole:  63   Top of Core Depth(m)   :   563.00   Rock Type: IGNEOUS
Core:  11   Sample Midpoint(m)     :   564.24   Sect/Pc #:  1/

ROCK = PLAG PHYRIC BASALT;
       Texture: PHYRIC*

Phenocrysts- PLAGIOCLASE
             Size(mm):        1-2  Morphology: LATHS+AGGREGATES,EUHEDRAL
             APPROX COMP AN90 OR MORE*

Groundmass - PLAGIOCLASE
             Morphology: LATHS

             PYROXENE
             A LESSER CONSTITUENT THAN OTHERS IN GROUNDMASS.
             GROUNDMASS ALSO CONSISTS OF SUBEQUAL AMOUNTS OF
             PINNATE PALE BROWN CHLORITE(.5MM AGGREGATES)
             PLUS FINE IRON OXIDES WITH PLAG LATHS,PLAG MUCH
             LESS ALTERED THAN IN 7-63-10-1-38.IN GENERAL THE
             BASALT FROM THE DEEPER LOCATION DIFFERS FROM THE
             NEAR-SEDIMENT SAMPLE IN THE FOLLOWING WAYS:1)PLAG
             PHENOS LESS ALTERED,2)RATIO OF XTLS TO ALTERED
             GLASS MUCH HIGHER IN THE GROUNDMASS,3)MUCH LOWER
             ABUNDANCE OF PALE GREEN MONTMORILLONITE? MASSES
             FILLING MICROVESICLES?*

Alteration - CHLORITE
             Location: GROUNDMASS

             MONTMORILLONITE
             Location: GROUNDMASS
             ROUNDED MASSES OF PALE GREEN MONTMORILLONITE? UP
             TO .3MM DIAMETER ARE MUCH LESS ABUNDANT THAN IN
             7-63-10-1-38*




    

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.

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