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Unique evidence of fluid alteration in the Kakowa (L6) ordinary chondrite

Baziotis, I. P. and Ma, C. and Guan, Y. and Ferrière, L. and Xydous, S. and Hu, J. and Kipp, M. A. and Tissot, F. L. H. and Asimow, P. D. (2022) Unique evidence of fluid alteration in the Kakowa (L6) ordinary chondrite. Scientific Reports, 12 . Art. No. 5520. ISSN 2045-2322. PMCID PMC9005539. doi:10.1038/s41598-022-09465-6.

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Meteorites preserve evidence of processes on their parent bodies, including alteration, metamorphism, and shock events. Here we show that the Kakowa (L6) ordinary chondrite (OC) preserves both shock-melt veins and pockets of detrital grains from a brecciated and altered object, including corundum, albite, silica, fayalite, forsterite, and margarite in a Pb- and Fe-rich matrix. Preservation of the observed mineralogy and texture requires a sequence of at least two impacts: first, a high-velocity collision formed the shock melt veins containing the high-pressure minerals ringwoodite, wadsleyite, majorite, and albitic jadeite; later, a low-velocity impact formed fractures and filled them with the detrital material. Oxygen and Pb isotope ratios suggest an OC origin for these detrital minerals. Although fluid alteration is common in carbonaceous chondrites, the discovery of margarite with an OC oxygen isotopic signature is novel. Kakowa extends both the impact and alteration history of L6 ordinary chondrites in general.

Item Type:Article
Related URLs:
URLURL TypeDescription CentralArticle
Baziotis, I. P.0000-0003-0185-5847
Ma, C.0000-0002-1828-7033
Guan, Y.0000-0002-7636-3735
Ferrière, L.0000-0002-9082-6230
Hu, J.0000-0003-0415-4616
Kipp, M. A.0000-0003-1844-3670
Tissot, F. L. H.0000-0001-6622-2907
Asimow, P. D.0000-0001-6025-8925
Additional Information:© 2022 The Authors. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit Received 06 October 2021; Accepted 24 March 2022; Published 12 April 2022. I.B. thanks the EU-funded SYNTHESYS [AT-TAF-30] project, which provided funds for travel, accommodation funds, and instrument costs while using SEM and EPMA at the NHMV. Stamatios Xydous greatly thanks “The Barringer Family Fund for Meteorite Impact Research” for its support. The authors are grateful to Dan Topa for assistance with the EPMA analyses. Analyses at Caltech were funded by NASA award 80NSSC18K0532. PDA acknowledges NSF award 1947614. Pb isotope analyses were funded by NSF grant MGG-2054892, a Packard Fellowship and Caltech start-up funds to FLHT. Contributions: All authors designed this research. All authors observed, analyzed the meteorite sections and participated in writing and reviewing the manuscript. The authors declare no competing interests.
Funding AgencyGrant Number
European UnionAT-TAF-30
David and Lucile Packard FoundationUNSPECIFIED
PubMed Central ID:PMC9005539
Record Number:CaltechAUTHORS:20220413-973965500
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Official Citation:Baziotis, I.P., Ma, C., Guan, Y. et al. Unique evidence of fluid alteration in the Kakowa (L6) ordinary chondrite. Sci Rep 12, 5520 (2022).
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:114273
Deposited By: Tony Diaz
Deposited On:13 Apr 2022 16:19
Last Modified:14 Apr 2022 16:46

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