Physics – Geophysics
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988gecoa..52.1383e&link_type=abstract
(Conference on Isotope Tracers in Geochemistry and Geophysics, Pasadena, CA, Mar. 23-25, 1987) Geochimica et Cosmochimica Acta (
Physics
Geophysics
30
Clays, Extraterrestrial Radiation, Manganese, Osmium Isotopes, Pacific Ocean, Pelagic Zone, Chondrites, Earth Crust, Geochemistry, Osmium, Oxalic Acid
Scientific paper
One of the difficulties of using elemental tracers such as iridium for estimating the total flux of extraterrestrial particles is the uncertainty of the terrestrial iridium contribution. The authors have used 187Os/186Os ratios and osmium concentrations in deep-sea and continental deposits to obtain both a measure of the total extraterrestrial particle flux to the Earth and an upper limit on the fraction of the extraterrestrial osmium carrier that is dissolved in the oceans.
Esser Bradley K.
Turekian Karl K.
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