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High pressure minerals in the Château-Renard (L6) ordinary chondrite: implications for collisions on its parent body

Baziotis, Ioannis; Asimow, Paul D.; Hu, Jinping; Ferrière, Ludovic; Ma, Chi; Cernok, Ana; Anand, Mahesh and Topa, Dan (2018). High pressure minerals in the Château-Renard (L6) ordinary chondrite: implications for collisions on its parent body. Scientific reports, 8(1), article no. 9851.

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We report the first discoveries of high-pressure minerals in the historical L6 chondrite fall Château-Renard, based on co-located Raman spectroscopy, scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy and electron backscatter diffraction, electron microprobe analysis, and transmission electron microscopy (TEM) with selected-area electron diffraction. A single polished section contains a network of melt veins from ~40 to ~200 μm wide, with no cross-cutting features requiring multiple vein generations. We find high-pressure minerals in veins greater than ~50 μm wide, including assemblages of ringwoodite + wadsleyite, ringwoodite + wadsleyite + majorite-pyropess, and ahrensite + wadsleyite. In association with ahrensite + wadsleyite at both SEM and TEM scale, we find a sodic pyroxene whose Raman spectrum is indistinguishable from that of jadeite but whose composition and structure are those of omphacite. We discuss constraints on the impact record of this meteorite and the L-chondrites in general.

Item Type: Journal Item
Copyright Holders: 2018 The Authors
ISSN: 2045-2322
Project Funding Details:
Funded Project NameProject IDFunding Body
SYNTHESYSAT-TAF-4526European Union
Not Set704696 RESOLVEEuropean Union Horizon 2020
Astronomy and Planetary Sciences at the Open UniversityST/L000776/1STFC (Science & Technology Facilities Council)
Consolidated Grant - Solar Studies and Planetary Studies (SS & PL 2016)ST/P000657/1STFC (Science & Technology Facilities Council)
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 55770
SWORD Depositor: Jisc Publications-Router
Depositing User: Jisc Publications-Router
Date Deposited: 11 Jul 2018 09:53
Last Modified: 02 May 2019 06:42
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