Geochemical evidence for the origin of moldavites

Details Geochemical evidence for the origin of moldavites Geochemical evidence for the origin of moldavites

Jan 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973gecoa..37..121b&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 37, Issue 1, pp.121-131

Physics

7

Scientific paper

Forty-eight moldavites and samples of rocks from the impact crater of Ries were analyzed using non-destructive neutron activation analysis. The following elements have been determined: La, Ce, Sm, Eu, Lu, Sc, Co, Cs, Hf and Th; and Rb and Cr in two moldavites. The darker moldavites, more common in Moravia, show higher contents of trace elements than those lighter in colour, from Southern Bohemia. Terrestrial igneous rocks cannot be regarded as a suitable source material, but terrestrial sandy to silty claystones show strong similarities in major and trace element abundances, and exhibit analogous inter-element variations to moldavites. The Tertiary claystones and sandstones which probably covered the Ries area before the impact, are a possible source rocks for moldavites.

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