Formation of sinoite in EL chondrites by impact melting

Details Formation of sinoite in EL chondrites by impact melting Formation of sinoite in EL chondrites by impact melting

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28.1201r&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 201.

Computer Science

Hypervelocity Impact, Chondrites, Oxynitrides, Minerals, Melting, Silicon Compounds, Enstatite, Metamorphism (Geology), Rocks

Scientific paper

Approximately 10-200-micron-sized sunhedral and euhedral grains of twinned, optically zoned sinoite associated with euhedral enstatite and graphite within impact-melted portions of QUE94368, the first EL4 chondrite, suggest that sinoite formed by crystallization from a melt, not by thermal metamorphism. The occurrence of olivine and enstatite with undulose extinction in QUE94368 indicates that the rock is shock stage S2, corresponding to an equilibration shock pressure of about 5 GPa, as in EL5 and EL6 chondrites.

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