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Noble gases and shock effects in the Odessa octahedrite (1976)

Herzog, G. F. ; Lipschutz, M. E. ; Jain, A. V. ; [et al.]

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Publication Date: 2019-06-27

Description: 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.

Keywords: LUNAR AND PLANETARY EXPLORATION

Type: Journal of Geophysical Research; 81; July 10

Format: text

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