Physics
Scientific paper
Apr 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.3129y&link_type=abstract
Journal of Geophysical Research, vol. 86, Apr. 10, 1981, p. 3129-3132. Research supported by the University of Tokyo.
Physics
8
Chemical Composition, Ocean Bottom, Sediments, Size Distribution, Spherules, Clays, Cobalt, Gold, Iridium, Iron, Iron Meteorites, Magnetic Materials, Neutron Activation Analysis
Scientific paper
A size spectrum of black magnetic spherules which were collected from deep-sea sediments was obtained. Siderophile element (Fe, Co, Ir, and Au) concentrations in 100 spherules, each of them larger than 100 microns, were determined with instrumental neutron activation analysis. About 20% of the spherules showed (Ir/Fe) and (Co/Fe) ratios which cannot be explained clearly by an iron meteorite parent for the spherules. Further, there was no strong correlation between the size and the chemical concentration ratios ((Ir/Fe), (Co/Fe), and (Au/Fe)) of the spherules.
Nogami Ken'ichi
Shimamura Tadashi
Yamakoshi Kazuo
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