Shock veins in the Sahara 02500 ordinary chondrite
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Date
2012-09-12T07:50:10Z
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Publisher
Wydawnictwo Naukowe UAM
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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.
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Keywords
Ordinary chondrite, Shock veins, Subsolidus recrystallization
Citation
Seria
18, (2);111-118
ISBN
ISSN
1426-8981