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A review of microbial-environmental interactions recorded in Proterozoic carbonate-hosted chert

Moore, Kelsey R. and Daye, Mirna and Gong, Jian and Williford, Kenneth and Konhauser, Kurt and Bosak, Tanja (2023) A review of microbial-environmental interactions recorded in Proterozoic carbonate-hosted chert. Geobiology, 21 (1). pp. 3-27. ISSN 1472-4677. doi:10.1111/gbi.12527.

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The record of life during the Proterozoic is preserved by several different lithologies, but two in particular are linked both spatially and temporally: chert and carbonate. These lithologies capture a snapshot of dominantly peritidal environments during the Proterozoic. Early diagenetic chert preserves some of the most exceptional Proterozoic biosignatures in the form of microbial body fossils and mat textures. This fossiliferous and kerogenous chert formed in shallow marine environments, where chert nodules, layers, and lenses are often surrounded by and encased within carbonate deposits that themselves often contain kerogen and evidence of former microbial mats. Here, we review the record of biosignatures preserved in peritidal Proterozoic chert and chert-hosting carbonate and discuss this record in the context of experimental and environmental studies that have begun to shed light on the roles that microbes and organic compounds may have played in the formation of these deposits. Insights gained from these studies suggest temporal trends in microbial-environmental interactions and place new constraints on past environmental conditions, such as the concentration of silica in Proterozoic seawater, interactions among organic compounds and cations in seawater, and the influence of microbial physiology and biochemistry on selective preservation by silicification.

Item Type:Article
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URLURL TypeDescription
Moore, Kelsey R.0000-0002-4905-9623
Gong, Jian0000-0001-7214-1628
Williford, Kenneth0000-0003-0633-408X
Konhauser, Kurt0000-0001-7722-7068
Bosak, Tanja0000-0001-5179-5323
Additional Information:We thank the Bosak lab, K. Morgenstein, and D. Hutkin for support. We additionally thank S. Golubic for helpful comments and we thank three anonymous reviewers and the editor for helpful and insightful comments and suggestions. DATA AVAILABILITY STATEMENT. Data sharing is not applicable; no new data are generated. All data are available in the publications cited throughout the manuscript as well as those cited in the figure and table captions. Research funding: Simons Foundation.
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Simons FoundationUNSPECIFIED
Issue or Number:1
Record Number:CaltechAUTHORS:20221031-575730600.47
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:117677
Deposited By: Research Services Depository
Deposited On:10 Nov 2022 19:12
Last Modified:25 Jan 2023 20:32

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