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Discovery of high-pressure polymorphs in the recent fall of Viñales (L6 ordinary chondrite): implications for collisions on its parent body

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.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1111/maps.13727DOIAbstracts
ORCID:
AuthorORCID
Baziotis, I. B.0000-0003-0185-5847
Hu, J.0000-0002-3705-8148
Ma, C.0000-0002-1828-7033
Ferrière, L.0000-0002-9082-6230
Asimow, P. D.0000-0001-6025-8925
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.
Funders:
Funding AgencyGrant Number
European Social FundUNSPECIFIED
Greek StateEDBM103
European UnionAT-TAF-30
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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