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Core Data from the Deep Sea Drilling Project


Leg : 38    Top/Bottom Interval(mm):  350/1500  Analyst: Kharin, G.
Hole: 348   Sample Midpoint (m)    :   528.00
Core:  32   Top of Core Depth (m)  :   522.00
Sect:  4    Top of Section Depth(m):   526.85

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE NO PIECE NUMBERS ASSIGNED;

  Texture    : APHYRIC, HOLOCRYSTALLINE, FINE-GRAINED, HOMOGENEOUS;

  Structure  : SLICKENSIDE WITH BLACK CHLORITE & PYRITE AT 35-45CM,
               VEINS FILLED WITH PYRITE & CHLORITE & CALCITE;

  Comments   : DARK GRAY (N3) TO GRAYISH BLACK (N2), CORE CATCHER
               IS THE SAME AS THIS SECTION BUT IS COMPOSED OF DRILL
               PEBBLES;

  Replacement: PYRITE

               CHLORITE

               CALCITE


Leg : 38    Top/Bottom Interval(mm):  450/1500  Analyst: Kharin, G.
Hole: 348   Sample Midpoint (m)    :   533.00
Core:  33   Top of Core Depth (m)  :   531.50
Sect:  1    Top of Section Depth(m):   531.95

LITHOLOGY: BASALT;

  Piece No.  : PCE NO PIECE NUMBERS ASSIGNED, INTERVALS 45-110 &
               120-150CM;

  Texture    : HOLOCRYSTALLINE, FINE-GRAINED, HOMOGENEOUS,
               APHANITIC AND VERY FINE-GRAINED NEAR CONTACTS WITH
               MUDSTONE AT 95-110 & 120CM;

  Structure  : RARE SLICKENSIDES AT 45-110CM, VEINS FILLED WITH
               CHLORITE & CALCITE--AT 120-150CM THE CHLORITE VEINS
               ARE 1-2MM THICK AND THE RARE CALCITE VEINS ARE 3-4MM
               THICK;

  Comments   : MEDIUM DARK GRAY (N4) TO DARK GRAY (N3) WITH MORE
               BLACK ON LOWER PORTION OF INTERVAL 45-110CM;

  Replacement: PYRITE
               ABUNDANT IN INTERVAL 120-150CM;

               CHLORITE
               GREEN, IN VEINS;

               CALCITE
               IN VEINS;


Leg : 38    Top/Bottom Interval(mm): 1100/1200  Analyst: Kharin, G.
Hole: 348   Sample Midpoint (m)    :   532.70
Core:  33   Top of Core Depth (m)  :   531.50
Sect:  1    Top of Section Depth(m):   532.60

LITHOLOGY: SEDIMENT (MUDSTONE);


Leg : 38    Top/Bottom Interval(mm):    0/1500  Analyst: Kharin, G.
Hole: 348   Sample Midpoint (m)    :   534.50
Core:  33   Top of Core Depth (m)  :   531.50
Sect:  2    Top of Section Depth(m):   533.00

LITHOLOGY: BASALT;

  Piece No.  : PCE NO PIECE NUMBERS ASSIGNED;

  Texture    : HOLOCRYSTALLINE, HOMOGENEOUS, FINE-GRAINED ON TOP TO
               FINE TO MEDIUM-GRAINED BELOW;

  Structure  : SLICKENSIDE AT 25-42CM, CALCITE-CHLORITE VEINS
               6-10MM THICK AT 67-73 & 123-128CM, CALCITE VEINS AT
               15-20CM;

  Comments   : GRAYISH BLACK (N2) TO BLACK (N1);

  Replacement: PYRITE
               IN VEINS;

               CHLORITE
               IN VEINS, CHLORITIZATION;

               CALCITE
               LARGE (1CM) CRYSTALS OF COLORLESS & YELLOWISH
               CALCITE IN THE VEINS AT 67-73 & 123-128CM;


Leg : 38    Top/Bottom Interval(mm):  950/1500  Analyst: Kharin, G.
Hole: 348   Sample Midpoint (m)    :   542.50
Core:  34   Top of Core Depth (m)  :   541.00
Sect:  1    Top of Section Depth(m):   541.95

LITHOLOGY: BASALT;
           SAME LITHOLOGY AS CORE 33-3;

  Piece No.  : PCE NO PIECE NUMBERS ASSIGNED;

  Texture    : COARSER-GRAINED THAN CORE 33-3;

  Structure  : RARE THIN BRANCHING BLACK CHLORITE VEINS 0.5-1MM
               THICK, SLICKENSIDES WITH BLACK CHLORITE ON WALLS;

  Replacement: CHLORITE


Leg : 38    Top/Bottom Interval(mm):    0/1500  Analyst: Kharin, G.
Hole: 348   Sample Midpoint (m)    :   544.00
Core:  34   Top of Core Depth (m)  :   541.00
Sect:  2    Top of Section Depth(m):   542.50

LITHOLOGY: BASALT;

  Piece No.  : PCE NO PIECE NUMBERS ASSIGNED;

  Structure  : AMYGDALOIDAL, PYRITE & CALCITE & CHLORITE VEINS
               BELOW 14CM--1-10MM THICK AND ABUNDANT AT 14-83CM;

  Comments   : DARK GRAY (N5), INTERVAL 75-83CM IS MYLONITIZED;

  Vesicles   : Size(mm):    0.5-2   Percent: 10-15
               AMYGDULES AT 0-14CM;

               Size(mm):            Percent:   3-5
               AMYGDULES AT 14-75CM;

               Size(mm):    0.2-2   Percent: 10-15
               Location:            Filling: CHLORITE
               BLACK CHLORITE AMYGDULES BELOW 90CM;

               Size(mm):            Percent: 10-15
               Location:            Filling: CALCITE
               WHITE CALCITE AMYGDULES AT 83-90CM;

  Groundmass : PLAGIOCLASE
               Size(mm):        3-4
               PLAG LATH AT 0-14CM;

               PLAGIOCLASE
               Size(mm):       5-10
               VERY THICK PLAG LATH AT 14-75CM;

  Replacement: CALCITE
               IN VEINS & AMYGDULES;

               PYRITE
               IN VEINS;

               CHLORITE
               IN VEINS & AMYGDULES;


    

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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