Rare gas studies of sixteen stony meteorites from Antarctica

Details Rare gas studies of sixteen stony meteorites from Antarctica Rare gas studies of sixteen stony meteorites from Antarctica

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983polre..30..349n&link_type=abstract

(National Institute of Polar Research, Symposium on Antarctic Meteorites, 8th, Tokyo, Japan, Feb. 17-19, 1983) National Institut

Computer Science

Meteoritic Composition, Rare Gases, Stony Meteorites, Argon, Cosmic Rays, Cosmochemistry, Helium, Isotopes, Neon, Xenon

Scientific paper

The concentrations of rare gases and isotopic compositions of He, Ne, and Ar were determined for fourteen chondrites and two achondrites from Antarctica. The Xe isotopic ratios were also determined for seven meteorites. Cosmic-ray exposure and gas retention ages are given. Exposure age of 55 Ma determined for Y-75015 eucrite is longer than those for most eucrites so far reported. Xe contained in chondrites is a mixture of cosmogenic and trapped components. Xe-129 excess from extinct I-129 was found for these chondrites. In Y-75015 eucrite, trapped and cosmogenic Xe's were dominant and an appreciable amount of fissiogenic Xe was detected. Five groups of paired meteorites are suggested on the basis of rare gas data.

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