|
|
Core data from the Ocean Drilling Program legs 101-129
leg : 109 section: 01 unit/subunit : 0001
hole: 0670A top int: 15 cm observer code: KUE
core: 001D pieces : 3
rock name: APHYRIC BASALT
contact : n/a
***** MAIN COMMENTS *****
Glass: None, no contacts.
***** PHENOCRYSTS *****
phenocryst name % size description
Olivine 5 < 0.5 mm Round, fresh to altered
microphenocrysts.
Homogeneous distribution.
***** GROUNDMASS *****
Fine grained.
***** COLOR *****
Brownish gray
***** VESICLES *****
miaroles: < 1%, < 1 mm, round, empty
None
***** STRUCTURE *****
n/a
***** ALTERATION *****
Fresh. dark alteration halo 5 mm wide along margin of sample, iron
hydroxide partially replacing some olivine.
***** VEINS/FRACTURES *****
None
leg : 109 section: 01 unit/subunit : 0001
hole: 0670A top int: 29 cm observer code: KUE
core: 002D pieces : 7
rock name: MEDIUM-GRAINED HYALOCLASTITE
contact : n/a
***** MAIN COMMENTS *****
Glass: Yes, angular-shaped fragments as large as 5 mm making 60% of sample,
outer margins of shards altered to palagonite.
***** PHENOCRYSTS *****
None
***** GROUNDMASS *****
Holohyaline fragments.
***** COLOR *****
Black shards in a rusty brown matrix.
***** VESICLES *****
percent: < 1
size: 1 mm
shape: Round, empty
distribution: n/a
< 1% of total sample, confined to glass.
***** STRUCTURE *****
n/a
***** ALTERATION *****
Matrix and outer margins of glass shards altered to palagonite.
***** VEINS/FRACTURES *****
Microfractures in matrix, empty.
leg : 109 section: 01 unit/subunit : 0001
hole: 0670A top int: 0 cm observer code: KUE
core: 003W pieces : 1
rock name: SPARSELY PLAGIOCLASE-OLIVINE PHYRIC BASALT RUBBLE
contact : n/a
***** MAIN COMMENTS *****
Glass: None, no contacts. Note: Coated calcareous mixture of microfossils,
nanofossils, and altered glass.
***** PHENOCRYSTS *****
phenocryst name % size description
Plagioclase 2-3 2-3 mm Euhedral, fresh
Olivine < 1 < 1 mm Rounded, clay and iron hydroxide
coatings.
Homogeneous distribution.
***** GROUNDMASS *****
Uniformly fine grained.
***** COLOR *****
Gray
***** VESICLES *****
percent: < 1
size: (< 5% of total voids),1 mm
shape: Round
distribution: Homogeneous distribution
miaroles: 2%, as large as 2 mm, elongate irregular, concentrated in two patches near
center of piece
Lined by blue clay.
***** STRUCTURE *****
n/a
***** ALTERATION *****
Slightly altered, sinuous multiple dark alteration halos 1 to 2 mm wide,
roughly concentric to large miarolitic patches and to margins of sample;
miaroles lined with thin greenish coating, and local iron hydroxides and
manganese oxides.
***** VEINS/FRACTURES *****
None
introduction | data types | geographic areas | legs/sites/holes | sites/holes
These Web pages are from the Core Data from the Ocean Drilling Program Legs 101-129 CD-ROM produced in 2001 by the U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Environmental Satellite, Data, and Information Service, National Geophysical Data Center, and collocated World Data Center for Marine Geology and Geophysics, Boulder. Data were compiled in cooperation with the U.S. Science Support Program, the Joint Oceanographic Institutions, Inc., and the U.S. National Science Foundation. Please see the NGDC privacy, disclaimer, and copyright notices. Additional ocean drilling data are available from NGDC and from the ODP/IODP.
questions to: carla.j.moore@noaa.gov