Noble gases in olivine from the Omolon pallasite

Details Noble gases in olivine from the Omolon pallasite Noble gases in olivine from the Omolon pallasite

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992geokh...7..923s&link_type=abstract

Geokhimiia (ISSN 0016-7525), no. 7, July 1992, p. 923-938. In Russian.

Computer Science

2

Iron Meteorites, Isotope Effect, Meteoritic Composition, Olivine, Rare Gases, Stony Meteorites, Atmospheric Composition, Geochronology, Mass Spectrometers, Solar Wind

Scientific paper

Concentrations and isotope compositions of He, Ne, Ar, Kr, and Xe in olivine from the Omolon pallasite were determined. Results showed large concentrations of cosmogenic isotopes, which radically differ from atmospheric and solar isotope compositions: 30-180 for He-3, 22-67 for Ne-21, and 3.8-5.3 for Ar-38 (all in 10 exp -8 cu cm/g). The isotope composition of Kr differs little from that in the atmosphere, and Xe displayed a large excess of Xe-129 (from 18 to 41 percent). The radiation age of the Omolon pallasite (78 +/-7 million years) is close to that of Thiel Mountain and Springwater pallasites.

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