Computer Science
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990gecoa..54.1463m&link_type=abstract
Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 54, May 1990, p. 1463-1474.
Computer Science
6
Chemical Composition, Geochemistry, Glass, Impact Melts, Meteorite Craters, Sedimentary Rocks, Trace Elements, Comparison, Electron Probes, Quartzite, Sandstones, Earth, Tektites, Glasses, Darwin Glass, Darwin Crater, Australia, Data, Major Elements, Trace Elements, Samples, Terrestrial, Classification, Laboratory Studies, Statistical Analysis, Chemistry, Composition, Origin, Enrichment, Electron Probe, Formation, Melting, Mixing, Volatiles, Temperature, Photographs, Comparisons, Impact Effects, Abundance
Scientific paper
Results are presented from major and trace element composition analyses of 18 Darwin (Australia) glass samples and seven target rocks from the Darwin crater area. It is found that the chemical composition of the glass samples is in agreement with an origin from terrestrial sediments during an impact. Analyses of the target rocks from the Darwin crater and mixing calculations show that the Darwin glass can be formed from the local target rocks. Evidence is presented for a loss of the volatile elements Ga, Zn, F, and B during the impact event. The elements Na, K, Rb, and Cs show lower abundance in the glass than in the target rocks. This suggests selective volatilization from the impact melt.
Ford Richard James
Koeberl Christian
Meisel Th.
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