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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Acknowledgements
Authors are thankful to A. A. Shiryaev, N. G. Zinovieva and A. Burmistrov for their help in conducting research. This research was supported by the Program 7 of ONZ RAN.
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Khisina, N.R., Pankrushina, E.A., Abdrakhimov, A.M. (2020). Localized Shock-Produced Melting in Meteorites. In: Votyakov, S., Kiseleva, D., Grokhovsky, V., Shchapova, Y. (eds) Minerals: Structure, Properties, Methods of Investigation. Springer Proceedings in Earth and Environmental Sciences. Springer, Cham. https://doi.org/10.1007/978-3-030-00925-0_12
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