Abstract
Local regions of shock-induced melting in meteorite Elga are represented by stratified schreibersite-oxide reaction rims developed around silicate inclusions during the primary shock event, and by melt pockets produced in silicate inclusions during a subsequent shock event. Melt pockets have been investigated with EMPA, SEM, TEM and Raman spectroscopy. Melt pockets manifest themselves by abundant schreibersite-dominated and silicate-dominated emulsions resulting from phosphide-silicate liquid immiscibility in shock-produced mixed melts. The first finding of phosphide-siderite liquid immiscibility in one of melt pockets is indicative of the extraterrestrial shock-induced origin of siderite in Elga.
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