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Shock veins in the Sahara 02500 ordinary chondrite

Krzysztof Owocki
  • Institute of Paleobiology, Polish Academy of Sciences, Twarda 51/55, 00-818 Warsaw, Poland
/ Andrzej Muszyński
  • Institute of Geology, Adam Mickiewicz University, Maków Polnych 16, 61-606 Poznań, Poland
Published Online: 2012-08-09 | DOI: https://doi.org/10.2478/v10118-012-0006-0

Shock veins in the Sahara 02500 ordinary chondrite

A specimen of the Sahara 02500 ordinary chondrite contains shock-produced veins consisting of recrystallised fine-grained pyroxenes that include small droplets of Ni-rich metal. Non-melted olivines and pyroxenes show planar deformations filled by shock-melted and -polluted metal and troilite. Shock-melted feldspathic glass is present close to the shock veins. Geothermometric estimations indicate that the meteorite locally experienced moderate shock metamorphism with a minimum local peak temperature above 1400°C, resulting in partial melting of Ca-poor pyroxene and full melting of feldspars, metal and sulphides. The mineral assemblage in the shock veins suggests a pressure during melt recrystallisation below 10 GPa.

Keywords: ordinary chondrite; shock veins; subsolidus recrystallization

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About the article

Published Online: 2012-08-09

Published in Print: 2012-08-01

Citation Information: Geologos, ISSN (Online) 2080-6574, ISSN (Print) 1426-8981, DOI: https://doi.org/10.2478/v10118-012-0006-0. Export Citation

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