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Science 2 December 1977:
Vol. 198. no. 4320, pp. 927 - 930
DOI: 10.1126/science.198.4320.927
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Articles

Primordial Noble Gases in Chondrites: The Abundance Pattern Was Established in the Solar Nebula

LEO ALAERTS 1, ROY S. LEWIS 1, and EDWARD ANDERS 1

1 Enrico Fermi Institute and Department of Chemistry, University of Chicago, Chicago, Illinois 60637

Ordinary chondrites, like carbonaceous chondrites, contain primordial noble gases mainly in a minor phase comprising le0.05 percent of the meteorite, probably an iron-chromium sulfide. The neon-20/argon-36 ratios decrease with increasing argon-36 concentration, as expected if the gas pattern was established by condensation from the solar nebula, and was negligibly altered by metamorphism in the meteorite parent bodies. Meteoritic and planetary matter apparently condensed over a substantial range of temperatures.

Submitted on August 2, 1977
Revised on September 7, 1977

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Science. ISSN 0036-8075 (print), 1095-9203 (online)