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Core Data from the Deep Sea Drilling Project


Leg : 70    Top/Bottom Interval(mm):    0/ 260  Analyst: Laverne, C.
Hole: 508B  Sample Midpoint (m)    :    51.76
Core:   3   Top of Core Depth (m)  :    51.50
Sect:  1    Top of Section Depth(m):    51.50

LITHOLOGY: PLAG MOD PHYRIC BASALT;

  Piece No.  : PCE 38 (2-9), 39 (11-17), 40 (19-26);

  Texture    : MOD PHYRIC, IN PCE 38 GLASSY RIM ON ONE SIDE OF
               THE FRAGMENT, PCE 40 IS FINE-GRAINED;

  Structure  : IN PCE 40 TWO SMALL FRACTURES FILLED WITH BROWN AND
               BLUE MATERIAL;

  Alteration : IN PCE 38 THICK ALTERED RIM (1CM THICKNESS) ON 3
               SIDES OF THE FRAGMENT, IN PCE 39 ALTERED RIM
               (7MM THICKNESS) ON ONE SIDE OF THE FRAGMENT, IN
               PCE 40 GRAY AND GREEN AND BLUE COATING (MAY BE 1
               OR 2MM OF MAXIMUM THICKNESS) ON ALL THE UNCUT
               SURFACES, SOME BROWN MATERIAL ALTERED RIM (5-10MM
               THICKNESS) ALL AROUND THE SAMPLE;
               FRESH
               INTERIOR OF PCE 38;

  Vesicles   : Size(mm):     TO 1   Percent:
               Location:            Filling: CLAY
               IN PCE 39 VESICLES ARE EMPTY IN THE FRESH
               INTERIOR AREA AND COATED WITH BLUE CLAY IN THE
               ALTERED RIM, IN PCE 39 VESICLES ARE RARE IN THE
               ALTERED AREA AND MOST ARE EMPTY, IN PCE 40 ALL
               VESICLES IN THE ALTERED RIM ARE COATED BY BLUE+
               BLUISH WHITE+YELLOW+BROWN+GREEN MATERIAL, VESICLES
               IN THE INTERIOR OF PCE 40 ARE EMPTY;

  Phenocrysts: PLAGIOCLASE

  Replacement: CLAY MINERALS


Leg : 70    Top/Bottom Interval(mm):  280/ 460  Analyst: Laverne, C.
Hole: 508B  Sample Midpoint (m)    :    51.96
Core:   3   Top of Core Depth (m)  :    51.50
Sect:  1    Top of Section Depth(m):    51.78

LITHOLOGY: PLAG SPARSELY PHYRIC BASALT;

  Piece No.  : PCE 41 (28-30), 43 (36-46);

  Texture    : SPARSELY PHYRIC, PCE 41 IS FINE-GRAINED, PCE 43
               IS MEDIUM-GRAINED;

  Alteration : PCE 41 HAS GRAY AND BROWN COATING ON THE UNCUT
               SURFACES, PCE 43 HAS AN ALTERATION RIM ON THREE
               SIDES AND GRAY+YELLOW+GREEN+BROWN COATING ON
               ALMOST THE WHOLE SURFACE;

  Vesicles   : IN PCE 41 PINPOINT BLUE COATED VESICLES ARE
               PRESENT;

               Location:            Filling: ZEOLITES
               IN THE FRESH PART OF PCE 43 VESICLES ARE
               PARTIALLY FILLED WITH ZEOLITES;
               IN THE ALTERED PARTS OF PCE 43 VESICLES ARE
               COATED WITH BLUE AND BROWN MATERIAL-ABOVE
               ZEOLITES(?);

  Phenocrysts: PLAGIOCLASE

               ZEOLITE


Leg : 70    Top/Bottom Interval(mm):  310/ 350  Analyst: Laverne, C.
Hole: 508B  Sample Midpoint (m)    :    51.85
Core:   3   Top of Core Depth (m)  :    51.50
Sect:  1    Top of Section Depth(m):    51.81

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 42 (31-35);

  Texture    : APHYRIC, MEDIUM-GRAINED;

  Alteration : FRESHER INTERIOR, THE ALTERED AREA IS
               DISTINGUISHED FROM THE FRESHER INTERIOR BY ITS
               DARKER COLOR;

  Vesicles   : Size(mm):     TO 1   Percent:
               PINPOINT TO 1MM IN DIAMETER, VESICLES ARE FILLED
               BY BROWN AND GREEN MATERIAL IN THE ALTERED AREA;


Leg : 70    Top/Bottom Interval(mm):    0/ 190  Analyst: Hubberten, H.-W.
Hole: 508B  Sample Midpoint (m)    :    57.69
Core:   4   Top of Core Depth (m)  :    57.50
Sect:  1    Top of Section Depth(m):    57.50

LITHOLOGY: APHYRIC BASALT;

  Piece No.  : PCE 44 (1-8), 45 (10-17);

  Texture    : APHYRIC, FINE-GRAINED, GLASSY RIMS AT TWO EDGES OF
               PCE 45;

  Alteration : FRESH
               PCE 44;

  Structure  : SMALL FRACTURE THROUGH PCE 45;

  Vesicles   : Size(mm):        6   Percent:
               Location:            Filling: PYRITE
               IN PCE 44 VESICLES ARE COATED WITH PYRITE PATCHES
               IN THE WORKING HALF;

               Size(mm):      0.1   Percent:
               Location:            Filling: CLAY
               IN PCE 45 VESICLES COATED WITH BLUE CLAY;

  Replacement: PYRITE

               CLAY MINERALS
               BLUE CLAY;


    

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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