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Shock veins in the Sahara 02500 ordinary chondrite Cover

Shock veins in the Sahara 02500 ordinary chondrite

Open Access
|Aug 2012

Abstract

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.

DOI: https://doi.org/10.2478/v10118-012-0006-0 | Journal eISSN: 2080-6574 | Journal ISSN: 1426-8981
Language: English
Page range: 111 - 118
Published on: Aug 9, 2012
Published by: Adam Mickiewicz University
In partnership with: Paradigm Publishing Services
Publication frequency: 3 issues per year

© 2012 Krzysztof Owocki, Andrzej Muszyński, published by Adam Mickiewicz University
This work is licensed under the Creative Commons License.

Volume 18 (2012): Issue 2 (August 2012)