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Open AccessArticle

Fe-Ni-P-S Melt Pockets in Elga IIE Iron Meteorite: Evidence for the Origin at High-Pressures Up to 20 GPa

1
Sobolev Institute of Geology and Mineralogy SB RAS, 630090 Novosibirsk, Russia
2
Department of Geology and Geophysics, Novosibirsk State University, 630090 Novosibirsk, Russia
3
Vernadsky Institute of Geochemistry and Analytical Chemistry RAS, 119334 Moscow, Russia
4
Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
*
Author to whom correspondence should be addressed.
The paper was presented at the 82nd Annual Meeting of the Meteoritical Society in Sapporo, Japan, 7–12 July 2019.
Minerals 2019, 9(10), 616; https://doi.org/10.3390/min9100616
Received: 31 July 2019 / Revised: 1 October 2019 / Accepted: 3 October 2019 / Published: 7 October 2019
(This article belongs to the Section Mineral Geochemistry and Geochronology)
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 Fe3P-Fe3S solid solution with the closure of an immiscibility gap at pressures near 20 GPa in static experiments. Some other melt pockets fit with the Fe2S-Fe2P 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. View Full-Text
Keywords: iron meteorite; shock metamorphism; high-pressure phases; phosphide; sulfide iron meteorite; shock metamorphism; high-pressure phases; phosphide; sulfide
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MDPI and ACS Style

Litasov, K.D.; Teplyakova, S.N.; Shatskiy, A.; Kuper, K.E. Fe-Ni-P-S Melt Pockets in Elga IIE Iron Meteorite: Evidence for the Origin at High-Pressures Up to 20 GPa. Minerals 2019, 9, 616.

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