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In-situ preservation of nitrogen-bearing organics in Noachian Martian carbonates

Koike, Mizuho and Nakada, Ryoichi and Kajitani, Iori and Usui, Tomohiro and Tamenori, Yusuke and Sugahara, Haruna and Kobayashi, Atsuko (2020) In-situ preservation of nitrogen-bearing organics in Noachian Martian carbonates. Nature Communications, 11 . Art. No. 1988. ISSN 2041-1723. PMCID PMC7181736. https://resolver.caltech.edu/CaltechAUTHORS:20200427-090618956

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Abstract

Understanding the origin of organic material on Mars is a major issue in modern planetary science. Recent robotic exploration of Martian sedimentary rocks and laboratory analyses of Martian meteorites have both reported plausible indigenous organic components. However, little is known about their origin, evolution, and preservation. Here we report that 4-billion-year-old (Ga) carbonates in Martian meteorite, Allan Hills 84001, preserve indigenous nitrogen(N)-bearing organics by developing a new technique for high-spatial resolution in situ N-chemical speciation. The organic materials were synthesized locally and/or delivered meteoritically on Mars during Noachian age. The carbonates, alteration minerals from the Martian near-surface aqueous fluid, trapped and kept the organic materials intact over long geological times. This presence of N-bearing compounds requires abiotic or possibly biotic N-fixation and ammonia storage, suggesting that early Mars had a less oxidizing environment than today.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1038/s41467-020-15931-4DOIArticle
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7181736PubMed CentralArticle
ORCID:
AuthorORCID
Koike, Mizuho0000-0002-8324-2106
Nakada, Ryoichi0000-0002-2684-3837
Kajitani, Iori0000-0001-9080-2303
Usui, Tomohiro0000-0002-4653-293X
Tamenori, Yusuke0000-0001-8004-895X
Sugahara, Haruna0000-0002-8388-3245
Additional Information:© 2020 The Author(s). 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/. Received 22 November 2019; Accepted 03 April 2020; Published 24 April 2020. A rock fragment of ALH 84001, 248 was kindly donated by the Meteoritical Working Group, Johnson Space Center, NASA. The FIB-SEM-based sample preparation was performed with the kind approval of Astromaterials Science Research Group (ASRG), JAXA. The synchrotron radiation experiments were performed with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal No. 2018B1062 and 2019A1389). This study is partly supported by JSPS Grants-in-Aid for Scientific Research (KAKENHI) to M. K. (18J02005 and 19K14790), to R. N. (17H06458), to T. U. (19H01960, 17H06459, 15KK0153, and 16H04073), and to A. K. (26630062 and 16H04276). A. K. was also supported by USA-DARPA Grant D17AC00019. We thank Prof. J. L. Kirschvink of the Division of Geological and Planetary Sciences, California Institute of Technology, for providing informative comments on an earlier draft of the manuscript. Data availability: All spectral data analyzed during this study are provided as figures (Fig. 2 in the main text and Supplementary Figs. 1–3 in our Supplementary Information). Their original data are available in Supplementary Table 3. Author Contributions: M. K., A. K., T. U., and H. S. prepared the samples and the reference materials. M. K., R. N., I. K., T. U., and Y. T. conducted the N µ-XANES measurements. M. K. took the lead in writing the manuscript. All the authors contributed in the discussion of the results and the improvement of the manuscript. The authors declare no competing interests.
Funders:
Funding AgencyGrant Number
Japan Society for the Promotion of Science (JSPS)18J02005
Japan Society for the Promotion of Science (JSPS)19K14790
Japan Society for the Promotion of Science (JSPS)17H06458
Japan Society for the Promotion of Science (JSPS)19H01960
Japan Society for the Promotion of Science (JSPS)17H06459
Japan Society for the Promotion of Science (JSPS)15KK0153
Japan Society for the Promotion of Science (JSPS)16H04073
Japan Society for the Promotion of Science (JSPS)26630062
Japan Society for the Promotion of Science (JSPS)16H04276
Defense Advanced Research Projects Agency (DARPA)D17AC00019
Japan Synchrotron Radiation Research Institute2018B1062
Japan Synchrotron Radiation Research Institute2019A1389
PubMed Central ID:PMC7181736
Record Number:CaltechAUTHORS:20200427-090618956
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200427-090618956
Official Citation:Koike, M., Nakada, R., Kajitani, I. et al. In-situ preservation of nitrogen-bearing organics in Noachian Martian carbonates. Nat Commun 11, 1988 (2020). https://doi.org/10.1038/s41467-020-15931-4
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:102789
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:27 Apr 2020 16:25
Last Modified:01 May 2020 15:40

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