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 : 69    Top/Bottom Interval(mm):  100/ 120  Describer: Pertsev, N.
Hole: 505   Top of Core Depth(m)   :   233.50   Rock Type: IGNEOUS
Core:  25   Sample Midpoint(m)     :   233.61   Sect/Pc #:  1/PCE 92

ROCK = PLAG-OL-CPX PHYRIC BASALT;
       Texture: PHYRIC,MICROLITIC,VARIOLITIC*

Phenocrysts- OLIVINE
             Size(mm):       3-10  Morphology: EUHEDRAL,SUBHEDRAL,ANHEDRAL

             OLIVINE                   ( 5-10%)
             Size(mm):        1-3  Morphology: EUHEDRAL,SUBHEDRAL,ANHEDRAL
             FRESH AND ALTERED ONLY ALONG RARE GRAINS,PERCENT
             IS FOR TOTAL OL PHENOS;

             PLAGIOCLASE
             Size(mm):       3-10  Morphology: EUHEDRAL,SUBHEDRAL

             PLAGIOCLASE
             Size(mm):        1-3  Morphology: EUHEDRAL,SUBHEDRAL

             PLAGIOCLASE
             Size(mm):       .3-1  Morphology: EUHEDRAL,SUBHEDRAL
             HUGE PLAG PHENOS CONTAIN GLASSY INCLUSIONS AND
             ROUNDED XTLS OF OL;

             CLINOPYROXENE             (   TR%)
             Size(mm):        1-3  Morphology: SUBHEDRAL
             PYX XTLS ARE RARE,ROUNDED,RESORBED AND SEEM TO BE
             XENOCRYSTS*

Groundmass - PLAGIOCLASE               (  >40%)
             Morphology: EUHEDRAL,SUBHEDRAL
             PERCENT IS FOR TOTAL PLAG IN SECTION;

             SPHERULITIC MESOSTASIS    (20-40%)

             TITANOMAGNETITE           (  1-5%)
             Morphology: EUHEDRAL,SUBHEDRAL
             SUBMICROSCOPIC AND DISSEMINATED EUHEDRAL AND
             SUBHEDRAL GRAINS, CR-SPINEL,PYRITE AND TITANO-MAGN
             ARE <1% OF SLIDE;

             CHROME SPINEL             (   TR%)
             Morphology: EUHEDRAL
             SPINEL GRAINS(SEVERAL) ARE BOTH IN PLAG PHENOS AND
             GROUNDMASS,CR-SPINEL AS LARGE EUHEDRAL GRAINS IN
             PLAG AND MESOSTASIS,THEY ARE VERMICULAR AND
             SKELETAL*

Alteration - SMECTITE
             Location: VEINS          Replacing: OL




Leg : 69    Top/Bottom Interval(mm):  280/ 300  Describer: Noack, Y.
Hole: 505   Top of Core Depth(m)   :   233.50   Rock Type: IGNEOUS
Core:  25   Sample Midpoint(m)     :   233.79   Sect/Pc #:  1/PCE 92

ROCK = PLAG-OL-CPX PHYRIC BASALT;
       Texture: PHYRIC,OPHITIC;
       Where sampled: FLOW INTERIOR*

Phenocrysts- OLIVINE
             Size(mm):        1-3

             OLIVINE                   ( 5-10%)
             Size(mm):       .3-1
             PERCENT IS FOR TOTAL OL PHENOS,FRESH RELICS OF OL,
             OL WITH SMECTITE RIMS(ALTERATION 50%),PHENOS OF
             OL-CPX-PLAG IN A MICROLITIC MESOSTASIS(PLAG-CPX);

             PLAGIOCLASE
             Size(mm):       3-10

             PLAGIOCLASE
             Size(mm):        1-3

             PLAGIOCLASE
             Size(mm):       .3-1

             CLINOPYROXENE
             Size(mm):        1-3

             CLINOPYROXENE
             Size(mm):       .3-1

Groundmass - PLAGIOCLASE
             Size(mm):      .1-.3

             PLAGIOCLASE
             Size(mm):     .03-.1

             PLAGIOCLASE               (20-40%)
             Size(mm):    .01-.03
             PERCENT IS FOR TOTAL PLAG IN SECTION,APPROX COMP
             AN50-70*

Alteration - SMECTITE
             Replacing: OL
             RARE VESICLES,LIGHT YELLOW WITH GOLD YELLOW RIM*




Leg : 69    Top/Bottom Interval(mm):  330/ 360  Describer: Noack, Y.
Hole: 505   Top of Core Depth(m)   :   238.00   Rock Type: IGNEOUS
Core:  26   Sample Midpoint(m)     :   238.35   Sect/Pc #:  1/PCE 97

ROCK = PLAG-OL-CPX PHYRIC BASALT;
       Texture: PHYRIC,OPHITIC;
       Where sampled: FLOW INTERIOR*

Phenocrysts- OLIVINE
             Size(mm):        1-3

             OLIVINE
             Size(mm):       .3-1

             PLAGIOCLASE
             Size(mm):        1-3

             PLAGIOCLASE
             Size(mm):       .3-1

             CLINOPYROXENE
             Size(mm):       .3-1

Groundmass - OLIVINE                   ( 5-10%)
             Size(mm):      .1-.3
             PERCENT IS FOR TOTAL OL IN SECTION,FRESH OL WITH
             SMECTITES IN CRACKS;

             PLAGIOCLASE
             Size(mm):      .1-.3

             PLAGIOCLASE
             Size(mm):     .03-.1

             PLAGIOCLASE               (  >40%)
             Size(mm):    .01-.03
             PERCENT IS FOR TOTAL PLAG IN SECTION*

Alteration - SMECTITE
             Location: VESICLES       Replacing: OL
             CRACKS AND SMALL VESICLES FILLED WITH YELLOW-RED
             MECTITES*

Vesicles   -
             Size(mm):   .03-.1
             Percent:  .5-1
             Filling: SMECTITE




Leg : 69    Top/Bottom Interval(mm):  330/ 360  Describer: Pertsev, N.
Hole: 505   Top of Core Depth(m)   :   238.00   Rock Type: IGNEOUS
Core:  26   Sample Midpoint(m)     :   238.35   Sect/Pc #:  1/PCE 97

ROCK = PLAG-OL-CPX-CR.SPINEL PHYRIC BASALT;
       Texture: PHYRIC,VARIOLITIC*

Phenocrysts- OLIVINE
             Size(mm):       3-10  Morphology: EUHEDRAL

             OLIVINE                   ( 5-10%)
             Size(mm):        1-3  Morphology: EUHEDRAL
             PERCENT IS FOR TOTAL OL PHENOS,FRESH-ALTERED
             ONLY ALONG RARE CRACKS;

             PLAGIOCLASE
             Size(mm):       3-10  Morphology: EUHEDRAL

             PLAGIOCLASE
             Size(mm):        1-3  Morphology: EUHEDRAL

             CLINOPYROXENE
             Size(mm):       3-10  Morphology: SUBHEDRAL

             CLINOPYROXENE             (   TR%)
             Size(mm):        1-3  Morphology: SUBHEDRAL
             PERCENT IS FOR TOTAL CPX PHENOS,CPX XTLS ARE VERY
             RARE AND ROUNDED,RESORBED,THEY SEEM TO BE
             XENOCRYSTS;

             CHROME SPINEL             (   TR%)
             Size(mm):       .3-1  Morphology: EUHEDRAL
             LARGE EUHEDRAL CR-SPINEL XTLS(SMALL PHENOS IN
             GROUNDMASS-SEVERAL GRAINS)WITHIN OL AND PLAG XTLS
             (VERMICULAR AND SKELETAL)*

Groundmass - PLAGIOCLASE               (20-40%)
             Size(mm):      .1-.3  Morphology: EUHEDRAL
             PERCENT IS FOR TOTAL PLAG IN SECTION;

             SPHERULITIC MESOSTASIS    (  >40%)

             PYRITE                    (    0%)

             TITANOMAGNETITE           (  1-5%)
             Size(mm):     .03-.1
             SUBMICROSCOPIC EUHEDRAL TITANO-MAGN IN THE
             MESOSTASIS,CR-SPINEL AND TITANO-MAGN ARE <1% OF
             SLIDE,CR-SPINEL/TITANO-MAGN=9/1*

Alteration - SMECTITE
             Location: VEINS,         Replacing: OL
             Location: VESICLES
             BROWN*

Vesicles   -
             Size(mm):     .3-1
             Percent:    TR
             Filling: SMECTITE
             Shape: ROUND




    

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