Baziotis, I. B. and Xydous, S. and Papoutsa, A. and Hu, J. and Ma, C. and Ferrière, L. and Klemme, S. and Berndt, J. and Asimow, P. D. (2021) Discovery of high-pressure polymorphs in the recent fall of Viñales (L6 ordinary chondrite): implications for collisions on its parent body. Meteoritics and Planetary Science, 56 (S1). Art. No. 17. ISSN 1086-9379. doi:10.1111/maps.13727. https://resolver.caltech.edu/CaltechAUTHORS:20211008-212436301
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Abstract
Ordinary chondrites record impact-related features, including high-pressure (HP) minerals, usually occurring in melt veins (MVs), yielding constraints on shock conditions and hence parameters such as the size of colliding bodies, impact velocity, etc. Here, we report the first observations of HP mineral polymorphs in the recent L6 chondrite fall of Viñales (Cuba, 1st February 2019; proposed shock stage S3 [1] and partly S4 [2]). The investigated thin section shows at least nine major, subparallel, MVs (50-600 μm wide) and a few thinner MVs at an angle to these. It is unclear whether they are of a single or multiple generations. We have so far identified, within a single melt vein, a region hosting the HP polymorphs majorite and albitic jadeite. These observations define a definite pressure range for this meteorite and contribute to the shock record of the L-chondrites in general.
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Additional Information: | © 2021 The Meteoritical Society. Issue Online: 09 August 2021. I.B., S.X., and A.P. received support for this research from ESF and the Greek State (call code EDBM103). I.B. thanks EU-funded SYNTHESYS [AT-TAF-30] project which provided travel and accommodation funds, and instrument time costs while using SEM and EPMA at the NHMV. | ||||||||||||
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Issue or Number: | S1 | ||||||||||||
DOI: | 10.1111/maps.13727 | ||||||||||||
Record Number: | CaltechAUTHORS:20211008-212436301 | ||||||||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20211008-212436301 | ||||||||||||
Official Citation: | (2021), 84th Annual Meeting of the Meteoritical Society (2021). Meteorit Planet Sci, 56: A1-A300. https://doi.org/10.1111/maps.13727 | ||||||||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||
ID Code: | 111304 | ||||||||||||
Collection: | CaltechAUTHORS | ||||||||||||
Deposited By: | Tony Diaz | ||||||||||||
Deposited On: | 08 Oct 2021 22:06 | ||||||||||||
Last Modified: | 16 Nov 2021 19:44 |
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