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Title: Shock veins in the Sahara 02500 ordinary chondrite
Authors: Owocki, Krzysztof
Muszyński, Andrzej
Keywords: Ordinary chondrite
Shock veins
Subsolidus recrystallization
Issue Date: 12-Sep-2012
Publisher: Wydawnictwo Naukowe UAM
Series/Report no.: 18, (2);111-118
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 1400ºC, 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.
ISSN: 1426-8981
Appears in Collections:Geologos, 2012, 18, 2

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