Noble gases and shock effects in the Odessa octahedrite

Details Noble gases and shock effects in the Odessa octahedrite Noble gases and shock effects in the Odessa octahedrite

Jul 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.3583h&link_type=abstract

Journal of Geophysical Research, vol. 81, July 10, 1976, p. 3583-3586. Research supported by the Research Corp. and Rutgers Res

Physics

3

Cratering, Iron Meteorites, Meteoritic Composition, Rare Gases, Shock Loads, Cosmology, Gas Composition, Impact Prediction, Radioactive Age Determination

Scientific paper

Noble gas contents and shock effects have been studied in 21 Odessa irons from known geographic locations. Cosmogenic He-3, Ne-21, Ar-38 contents and He-3/Ne-21 ratios vary by factors of 62, 91, 68, and 1.55, respectively, while Ne-22/Ne-21 ratios are virtually constant at 1.07. The samples fall into two groups differing by a factor of 4.1 in exposure age, 1000 in source mass, or some combination of these. Three samples show significant shock effects, two of them to above 130 kbar, probably arising during terrestrial impact from the crater-forming explosion. As in Canyon Diablo plains specimens, noble gas contents do not correlate with siting or shock.

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