Fe-Ni-P-S Melt Pockets in Elga IIE Iron Meteorite: Evidence for the Origin at High-Pressures Up to 20 GPa
| Autor: | Konstantin D. Litasov, Anton Shatskiy, Svetlana N. Teplyakova, Konstantin E. Kuper |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
lcsh:Mineralogy
lcsh:QE351-399.2 Materials science sulfide 010504 meteorology & atmospheric sciences Analytical chemistry phosphide Geology Ureilite iron meteorite 010502 geochemistry & geophysics Geotechnical Engineering and Engineering Geology 01 natural sciences Iron meteorite Parent body high-pressure phases Shock metamorphism Microcrystalline Meteorite shock metamorphism Earth (classical element) 0105 earth and related environmental sciences Solid solution |
| Zdroj: | Minerals Volume 9 Issue 10 Minerals, Vol 9, Iss 10, p 616 (2019) |
| ISSN: | 2075-163X |
| DOI: | 10.3390/min9100616 |
| Popis: | Here we report new data on high-pressure microstructures in Elga group IIE iron meteorites, made of solidified Fe-Ni-P-S melt pockets and microcrystalline aggregates, which could be formed only at high pressures and temperatures according to the experimental data. The bulk composition of the melt pockets and crystals correspond to the Fe< sub> 3< /sub> P-Fe< S solid solution with the closure of an immiscibility gap at pressures near 20 GPa in static experiments. Some other melt pockets fit with the Fe< 2< S-Fe< P compositions, which could also correspond to high pressures and temperatures. The results suggest a late shock episode during the formation of the IIE iron parent body, which may be prior or due to the final disruption that caused the meteorite arrival to Earth. It also has an important implication to the shock features in other meteorites, such as ureilite. |
| Databáze: | OpenAIRE |
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