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Core Data from the Deep Sea Drilling Project


Leg : 69    Top/Bottom Interval(mm):  510/ 530  Describer: Pertsev, N.
Hole: 504A  Top of Core Depth(m)   :   265.00   Rock Type: IGNEOUS
Core:   6   Sample Midpoint(m)     :   265.52   Sect/Pc #:  1/PCE 11

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

Phenocrysts- OLIVINE                   (    1%)
             Size(mm):      TO .5  Morphology: EUHEDRAL

             PLAGIOCLASE               (    4%)
             Size(mm):     .5-1.5  Morphology: EUHEDRAL,SUBHEDRAL,LATHS,

             Morphology: GLOMEROCRYSTS
             CORE APPROX COMP AN73, RIM APPROX COMP AN67;

             CLINOPYROXENE             (    2%)
             Size(mm):       .5-1  Morphology: SUBHEDRAL GLOMEROCRYSTS

Groundmass - OLIVINE                   (    5%)
             Size(mm):      .1-.3  Morphology: ANHEDRAL

             PLAGIOCLASE               (   38%)
             Size(mm):      .1-.7  Morphology: MICROLITES

             CLINOPYROXENE             (   45%)
             Size(mm):      .1-.5  Morphology: RADIATED AGGREGATES+GRAINS

             MAGNETITE                 (    5%)
             Size(mm):      .1-.3  Morphology: SUBHEDRAL,SKELETAL

Alteration - CARBONATE                 (  <.5%)
             Location: VEINS,OL       Replacing: OL
             Location: PSEUDOMORPHS

             CLAY MINERALS             (    6%)
             Location: VEINS          Replacing: OL
             OLIVE BROWN DARK SMECTITE*

Vesicles   -
             Size(mm):    TO .2
             Percent:     1
             Filling: SMECTITE
             Shape: ROUND




Leg : 69    Top/Bottom Interval(mm):  570/ 590  Describer: Pertsev, N.
Hole: 504A  Top of Core Depth(m)   :   265.00   Rock Type: IGNEOUS
Core:   6   Sample Midpoint(m)     :   265.58   Sect/Pc #:  1/PCE 12

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

Phenocrysts- OLIVINE                   (    1%)
             Size(mm):      .2-.5  Morphology: EUHEDRAL

             PLAGIOCLASE               (    4%)
             Size(mm):       .5-2  Morphology: EUHEDRAL,SUBHEDRAL

             CLINOPYROXENE             (    1%)
             Size(mm):       .5-1  Morphology: SUBHEDRAL,ANHEDRAL

Groundmass - OLIVINE                   (    4%)
             Size(mm):      .1-.2  Morphology: SUBHEDRAL,ANHEDRAL

             PLAGIOCLASE               (   40%)
             Size(mm):      .1-.7  Morphology: MICROLITES

             CLINOPYROXENE             (   45%)
             Size(mm):      .1-.5  Morphology: RADIATED AGGREGATES+GRAINS

             MAGNETITE                 (    5%)
             Size(mm):      .1-.3  Morphology: SUBHEDRAL,SKELETAL

Alteration - CLAY MINERALS             (    5%)
             Replacing: OL
             OLIVE BROWN SMECTITE*




Leg : 69    Top/Bottom Interval(mm):  940/ 960  Describer: Pertsev, N.
Hole: 504A  Top of Core Depth(m)   :   265.00   Rock Type: IGNEOUS
Core:   6   Sample Midpoint(m)     :   267.45   Sect/Pc #:  2/PCE 40

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

Phenocrysts- OLIVINE                   (    1%)
             Size(mm):      .2-.5  Morphology: EUHEDRAL

             PLAGIOCLASE               (   15%)
             Size(mm):       .3-2  Morphology: EUHEDRAL,SUBHEDRAL

             CLINOPYROXENE             (    5%)
             Size(mm):       .3-1  Morphology: SUBHEDRAL,ANHEDRAL

Groundmass - OLIVINE                   (    5%)
             Size(mm):    .05-.15  Morphology: ANHEDRAL

             PLAGIOCLASE               (   25%)
             Size(mm):     .05-.5  Morphology: MICROLITES

             CLINOPYROXENE             (   43%)
             Size(mm):     .05-.3  Morphology: RADIATED AGGREGATES

             MAGNETITE                 (    5%)
             Size(mm):     .05-.1  Morphology: ANHEDRAL

Alteration - CLAY MINERALS             (    7%)
             Location: VESICLES       Replacing: OL
             OLIVE BROWN SMECTITE*

Vesicles   -
             Size(mm):     TO 2
             Percent:     1
             Filling: SMECTITE
             Shape: ROUND




Leg : 69    Top/Bottom Interval(mm):  130/ 170  Describer: damson, A.C.
Hole: 504A  Top of Core Depth(m)   :   265.00   Rock Type: IGNEOUS
Core:   6   Sample Midpoint(m)     :   268.15   Sect/Pc #:  3/PCE 48

ROCK = PLAG-OL-CPX MOD PHYRIC BASALT;
       Texture: MOD PHYRIC,HOLOXTLLINE,SUBOPHITIC,VARIOLITIC
       SUBOPHITIC TEXTURE BETWEEN CPX AND PLAG;
       Where sampled: FLOW INTERIOR*

Phenocrysts- OLIVINE
             Size(mm):       .3-1  Morphology: EUHEDRAL,SUBHEDRAL
             PSEUDOMORPHS;

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

             PLAGIOCLASE
             Size(mm):        1-3  Morphology: SUBHEDRAL
             GLOMEROCRYSTS(1-3MM)NOT COMMON(3 ON SLIDE),WITH
             AN68 COMPOSITION;

             CLINOPYROXENE
             Size(mm):       .3-1  Morphology: ANHEDRAL

Groundmass - OLIVINE                   (  1-5%)
             Size(mm):      .1-.3  Morphology: EUHEDRAL,SUBHEDRAL
             PERCENT IS FOR TOTAL OL;

             PLAGIOCLASE               (20-40%)
             Size(mm):      .1-.3  Morphology: EUHEDRAL,SUBHEDRAL
             PERCENT IS FOR TOTAL PLAG IN SECTION,APPROX COMP
             AN60-80,OFTEN ZONED(CORES AN78,RIMS AN65),MORE
             SODIC ON EXTERIORS,INTERIOR HAS ROUNDED EDGES;

             CLINOPYROXENE
             Size(mm):      .1-.3  Morphology: ANHEDRAL

             CLINOPYROXENE             ( 5-10%)
             Size(mm):     .03-.1  Morphology: ANHEDRAL
             PERCENT IS FOR TOTAL CPX;

             SPHERULITIC MESOSTASIS    (20-40%)
             MAY BE CPX(YELLOW INTERFERENCE COLORS IN SOME
             AREAS AROUND EDGES);

             TITANOMAGNETITE           (  1-5%)
             Size(mm):    .01-.03  Morphology: SUBHEDRAL
             ASSOCIATED WITH THE MESOSTASIS*

Alteration - GOETHITE
             Location: VESICLES+
             Location: CRACKS
             ID UNCERTAIN FOR GOETHITE;

             SMECTITE
             Location: VESICLES+      Replacing: OL
             Location: CRACKS
             SEVERAL IRREGULAR PATCHES OF SMECTITE SHOW STRONG
             IRON STAINING IN THEIR CORES-CHANGING FROM DARK
             GREEN TO YELLOW TO ORANGE AND THEN RUST FROM
             WEATHERED BASALT INTO THE CORE-MAY BE PATHS FOR
             HYDROTHERMAL ALTERATION,SIMILAR ZONING IN SMALL
             VEINS,OR REVERSED*

Vesicles   -
             Size(mm):    .1-.3
             Percent:  .5-1
             Filling: SMECTITE
             Shape: ROUND




Leg : 69    Top/Bottom Interval(mm):  610/ 620  Describer: Pertsev, N.
Hole: 504A  Top of Core Depth(m)   :   265.00   Rock Type: IGNEOUS
Core:   6   Sample Midpoint(m)     :   268.62   Sect/Pc #:  3/PCE 54

ROCK = PLAG-OL-CPX MOD PHYRIC BASALT
       THERE IS OXIDATION ZONALITY(ALONG A CRACK)- THE
       CRACK IS FILLED WITH BRIGHT RED-BROWN CLAY MINERAL
       CONTAMINATED IRON OXIDES, NEXT ZONE CONTAINS
       ALMOST BLACK(VERY DARK GREEN)CLAY FILLINGS OF
       VESICLES AND OL PSEUDOMORPHS, THE LAST PART OF THE
       ROCK IN THE SECTION CONTAINS USUAL OLIVE GREEN
       FILLINGS OF VESICLES AND OL PSEUDOMORPHS;
       Texture: MOD PHYRIC,VARIOLITIC;
       Where sampled: FLOW INTERIOR*

Phenocrysts- OLIVINE
             Size(mm):       .3-1  Morphology: EUHEDRAL,SUBHEDRAL,ANHEDRAL

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

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

             CLINOPYROXENE
             Size(mm):       .3-1  Morphology: ANHEDRAL

Groundmass - OLIVINE
             Size(mm):      .1-.3  Morphology: EUHEDRAL,SUBHEDRAL,ANHEDRAL

             OLIVINE                   (  1-5%)
             Size(mm):     .03-.1  Morphology: EUHEDRAL,SUBHEDRAL,ANHEDRAL
             PERCENT IS FOR TOTAL OL IN SECTION;

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

             PLAGIOCLASE               (20-40%)
             Size(mm):     .03-.1  Morphology: EUHEDRAL,SUBHEDRAL
             PERCENT IS FOR TOTAL PLAG IN SECTION;

             CLINOPYROXENE
             Size(mm):      .1-.3  Morphology: ANHEDRAL

             CLINOPYROXENE             ( 5-10%)
             Size(mm):     .03-.1  Morphology: ANHEDRAL
             PERCENT IS FOR TOTAL CPX IN SECTION;

             SPHERULITIC MESOSTASIS    (20-40%)

             TITANOMAGNETITE           (  1-5%)

Alteration - SMECTITE
             Location: VESICLES       Replacing: OL

Vesicles   -
             Percent:  .5-1
             Filling: SMECTITE
             Shape: ROUND




Leg : 69    Top/Bottom Interval(mm):  750/ 770  Describer: Pertsev, N.
Hole: 504A  Top of Core Depth(m)   :   273.00   Rock Type: IGNEOUS
Core:   7   Sample Midpoint(m)     :   273.76   Sect/Pc #:  1/PCE 67

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

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

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

             CLINOPYROXENE
             Size(mm):       .3-1  Morphology: SUBHEDRAL,ANHEDRAL

Groundmass - OLIVINE
             Size(mm):      .1-.3  Morphology: SUBHEDRAL,ANHEDRAL
             PERCENT IS FOR TOTAL OL;

             OLIVINE                   (  1-5%)
             Size(mm):     .03-.1  Morphology: SUBHEDRAL,ANHEDRAL

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

             CLINOPYROXENE             (20-40%)
             Size(mm):      .1-.3  Morphology: SUBHEDRAL,ANHEDRAL
             PERCENT IS FOR TOTAL CPX IN SECTION;

             SPHERULITIC MESOSTASIS    (10-20%)

             TITANOMAGNETITE
             Size(mm):      .1-.3

             TITANOMAGNETITE           (  1-5%)
             Size(mm):     .03-.1
             PERCENT IS FOR TOTAL TITANO-MAGN*

Alteration - SMECTITE
             Replacing: OL




Leg : 69    Top/Bottom Interval(mm): 1410/1450  Describer: Pertsev, N.
Hole: 504A  Top of Core Depth(m)   :   273.00   Rock Type: IGNEOUS
Core:   7   Sample Midpoint(m)     :   274.43   Sect/Pc #:  1/PCE 76

ROCK = PLAG-OL-CPX SPARSELY PHYRIC BASALT;
       Texture: PHYRIC,VARIOLITIC;
       Where sampled: PILLOW RIM*

Phenocrysts- OLIVINE                   (  1-5%)
             Size(mm):        1-3  Morphology: EUHEDRAL

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

             PLAGIOCLASE               ( 5-10%)
             Size(mm):       .3-1  Morphology: EUHEDRAL
             PERCENT IS FOR TOTAL PLAG;

             CLINOPYROXENE
             Size(mm):        1-3  Morphology: SUBHEDRAL

             CLINOPYROXENE             (  1-5%)
             Size(mm):       .3-1  Morphology: SUBHEDRAL
             PERCENT IS FOR TOTAL CPX*

Groundmass - SPHERULITIC MESOSTASIS    (   80%)

Alteration - SMECTITE
             Location: VESICLES       Replacing: OL
             LIGHT OLIVE BROWN*

Vesicles   -
             Size(mm):     .3-1
             Percent:   1-5
             Filling: SMECTITE
             Shape: ROUND




Leg : 69    Top/Bottom Interval(mm):  280/ 300  Describer: Pertsev, N.
Hole: 504A  Top of Core Depth(m)   :   273.00   Rock Type: IGNEOUS
Core:   7   Sample Midpoint(m)     :   274.79   Sect/Pc #:  2/PCE 79

ROCK = PLAG-OL-CPX PHYRIC BASALT;
       Texture: PHYRIC;
       Where sampled: PILLOW INTERIOR*

Phenocrysts- OLIVINE
             Size(mm):        1-3  Morphology: EUHEDRAL

             OLIVINE                   (  1-5%)
             Size(mm):       .3-1  Morphology: EUHEDRAL
             PERCENT IS FOR TOTAL OL;

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

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

             PLAGIOCLASE               (10-20%)
             Size(mm):       .3-1  Morphology: EUHEDRAL,SUBHEDRAL
             PERCENT IS FOR TOTAL PLAG;

             CLINOPYROXENE
             Size(mm):        1-3  Morphology: ANHEDRAL

             CLINOPYROXENE             (  1-5%)
             Size(mm):       .3-1  Morphology: ANHEDRAL
             PERCENT IS FOR TOTAL CPX*

Groundmass - SPHERULITIC MESOSTASIS    (   60%)

             TITANOMAGNETITE           (  1-5%)
             Size(mm):      .1-.3

Alteration - CELADONITE
             Location: VESICLES       Replacing: OL
             GREEN*

Vesicles   -
             Size(mm):      1-3
             Filling: CELADONITE
             Shape: ROUND

             Size(mm):     .3-1
             Percent:   1-5
             Filling: CELADONITE
             Shape: ROUND
             PERCENT IS FOR TOTAL VESICLES*




    

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