<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>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.</p></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.

Shock veins in the Sahara 02500 ordinary chondrite

Institute of Paleobiology, Polish Academy of Sciences, Twarda 51/55, 00-818 Warsaw, Poland

Institute of Geology, Adam Mickiewicz University, Maków Polnych 16, 61-606 Poznań, Poland

Geologos

{"article-title":"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...

Shock veins in the Sahara 02500 ordinary chondrite

Publié en ligne: 09 août 2012

Pages: 111 - 118

DOI: https://doi.org/10.2478/v10118-012-0006-0

Mots clés
ordinary chondrite, shock veins, subsolidus recrystallization

This content is open access.

Shock veins in the Sahara 02500 ordinary chondrite

Publié en ligne: 09 août 2012

Pages: 111 - 118

DOI: https://doi.org/10.2478/v10118-012-0006-0

Mots clésordinary chondrite, shock veins, subsolidus recrystallization

This content is open access.

Mots clés
ordinary chondrite, shock veins, subsolidus recrystallization