Geochemistry of microelements in impact process

Details Geochemistry of microelements in impact process Geochemistry of microelements in impact process

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992geokh......323i&link_type=abstract

Geokhimiia (ISSN 0016-7525), March 1992, p. 323-337. In Russian.

Computer Science

Basalt, Geochemistry, Granite, Hypervelocity Impact, Impact Melts, Metal Vapors, Chemical Composition, Geochronology, Lithology, Refractory Metals, Trace Elements

Scientific paper

Data are presented from an investigation of impact evaporation of lithophilic (Na, K, Rb, U, Th, La, Ce, Sm, Yb, Lu, Sc, and Cr) and siderophilic (Fe, Ni, Co, and Au) elements from basaltic and granitic targets. Results indicate a preferential (relative to Na) redistribution of refractory lithophiles into the condensate. Theoretical considerations are offered to explain causes of the abnormal evaporation of the compounds in a melt under high-speed impact conditions. The data obtained can be used for interpretations of the geochemical features of impactites, as well as for studying the genesis of lunar KREEP matter and terrestrial protogranite.

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