Other
Scientific paper
Jun 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979gecoa..43..803m&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 43, June 1979, p. 803-815.
Other
14
Earth Surface, Meteorite Craters, Meteoritic Composition, West Germany, Abundance, Core Sampling, Statistical Correlation, Trace Elements, Volatility
Scientific paper
Twenty-three samples covering a wide range of shock metamorphism from the Ries impact crater in southern Germany were analyzed for siderophile and volatile elements in order to determine the chemical nature of the impacting meteorite. Slight enrichments in the siderophile elements Ir and Os above the indigenous level of 0.015 ppb were observed in only eight samples, including a shocked, metal-bearing amphibolite and two weakly shocked biotite gneisses, whereas those samples expected to contain meteoritic material (heavily shocked glasses) do not exhibit a perceptible siderophile enrichment. The Ir, Os and Ni enrichments of the metal bearing amphibolite are found to be compatible with chondritic ratios, while in the other enriched samples, Ir, Ni and Se relationships suggest an achondritic meteoritic origin. An aubritic projectile is concluded to be most compatible with the data.
Groß Jonathan
Hertogen Jan
Janssens Marie-Josée
Morgan John W.
Takahashi Hiroyuki
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