Computer Science
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987natur.329..703t&link_type=abstract
Nature (ISSN 0028-0836), vol. 329, Oct. 22, 1987, p. 703-705. NSF-supported research.
Computer Science
10
Antarctic Regions, Atmospheric Composition, Iridium, Meteoritic Composition, Air Sampling, Cobalt, Iron, Manganese, Planetary Mass, Meteorites, Iridium, Earth, Atmosphere, Polar Regions, Flux, Analysis, Samples, Terrestrial, Enrichment, Chalcophiles, Concentration, Accretion, Cobalt, Iron, Manganese, Samples, Extraterrestrial, Chromotography, Neutron Activation Analysis, Inaa
Scientific paper
A determination of the average particle-borne Ir concentration in the South Pole atmosphere is presented. The average values of (7.3 + or - 3.1) x 10 to the -17th g/cu m suggests that the concentration of extraterrestrial material in the South Pole atmosphere is not large enough to explain the enrichments of anomalously enriched elements; however, meteoritic material contributes significantly to the observed concentrations of Co, Fe, and Mn. An accretion rate for background extraterrestrial material of 11,000 tons annually is estimated.
Tuncel G.
Zoller William H.
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