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LL-Chondrite Northwest Africa 6813: sampling an impact-cratered asteroid

Hoare, Liam, Schmieder, M and Kring, D. A. 2017. LL-Chondrite Northwest Africa 6813: sampling an impact-cratered asteroid. Presented at: 48th Lunar and Planetary Science Conference, Houston, TX, USA, 20 -24 March 2017. -.

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Abstract

Impact cratering is one of the dominant geologic processes affecting asteroids. It results in shock-induced melting and the formation of impactites, including impact melt breccias. Meteoritic samples of these breccias possess petrologic and geochemical signatures that can be used to deduce the collisional evolution of the respective parent body, such as the timing of the event, shock metamorphic conditions during the impact, subsequent two-stage cooling, and an estimate of the size of the impact crater itself. In this study we analyzed the petrography and mineral chemistry of Northwest Africa (NWA) 6813 in order to elucidate its thermal and impact history. NWA 6813 was classified as an LL6 impact melt breccia [1], which is part of a group of ordinary chondrites whose impact lithologies remain poorly described.

Item Type: Conference or Workshop Item (Paper)
Status: Unpublished
Schools: Earth and Ocean Sciences
Subjects: Q Science > QE Geology
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Date of First Compliant Deposit: 6 February 2018
Last Modified: 10 Mar 2020 14:30
URI: http://orca.cf.ac.uk/id/eprint/109286

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  • LL-Chondrite Northwest Africa 6813: sampling an impact-cratered asteroid. (deposited 28 Feb 2018 12:47) [Currently Displayed]

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