Computer Science
Scientific paper
Nov 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988gecoa..52.2639b&link_type=abstract
Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 52, Nov. 1988, p. 2639-2649.
Computer Science
6
Argon, Craters, Granite, Meteorites, Argon Isotopes, Ejecta, Radioactive Age Determination
Scientific paper
Five granite clasts from the Otting and Aumuehle quarries in the suevite ejecta deposits from the Ries Crater, Germany, were characterized with respect to modal composition, the degree of shock, and the loss of radiogenic Ar. The results were used to estimate the relative fractions of total crater volume, which were characterized by undisturbed K-Ar ages, partly reset ages, and essentially complete gas loss. The results suggest that the loss of Ar form the Ries suevite samples occurred in a 'hot' post-impact ejecta layer. It was estimated that less than 50 percent of the material composing the hot Ries ejecta should show at least partially reset K-Ar ages; such materials compose no more than 5 percent of the total displaced crater volume.
Bogard Donald D.
Hoerz Friedrich
Stoeffler Dieter
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