Preliminary data on the shock-induced high-pressure transformation of olivine |
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| Authors: | H. Schneider U. Hornemann |
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| Affiliation: | Mineralogisches Institut der Universität Karlsruhe, Kaiserstrasse 12, 7500 Karlsruhe 1Federal Republic of Germany;Arbeitsgruppe für Ballistische Forschung, Hauptstrasse 18, 7858 Weil/Rh. Federal Republic of Germany |
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| Abstract: | Shock recovery experiments on olivine single crystals (mineralogical composition: forsterite～80) have been carried out in a pressure range from～200up to～ 575kbar. Infrared spectroscopic investigations indicate a transformation of the mineral within a pressure interval from～420to～575kbar. Exposure to dynamic pressures of～575kbar yielded complete decomposition of the former olivine into an X-ray amorphous material upon pressure release. The infrared investigations suggest the post-shock products to consist essentially out of short-range-ordered (Mg,Fe)O and SiO2. |
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