Postdiagenetic Changes in Kerogen Properties and Type by Bacterial Oxidation and Dehydrogenation
1
Department of Geomicrobiology, Institute of Microbiology, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland
2
International Institute of Molecular and Cell Biology in Warsaw, Księcia Trójdena 4, 02-109 Warsaw, Poland
3
Laboratory of Systems Biology, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland
4
Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5A, 02-106 Warsaw, Poland
*
Author to whom correspondence should be addressed.
Academic Editor: José A. González-Pérez
Molecules 2022, 27(8), 2408; https://doi.org/10.3390/molecules27082408
Received: 1 March 2022
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Revised: 30 March 2022
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Accepted: 6 April 2022
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Published: 8 April 2022
A significant part of organic carbon found on the earth is deposited as fossil organic matter in the lithosphere. The most important reservoir of carbon is shale rocks enriched with organic matter in the form of kerogen created during diagenesis. The purpose of this study was to analyze whether the bacterial communities currently inhabiting the shale rocks have had any impact on the properties and type of kerogen. We used the shale rock located on the Fore-Sudetic Monocline, which is characterized by oil-prone kerogen type II. We were able to show that shale rock inhabited by bacterial communities are characterized by oxidized and dehydrated kerogen type III (gas-prone) and type IV (nonproductive, residual, and hydrogen-free). Bacterial communities inhabiting shale rock were dominated by heterotrophs of the Proteobacteria, Firmicutes, and Actinobacteria phyla. Additionally, we detected a number of protein sequences in the metaproteomes of bacterial communities matched with enzymes involved in the oxidative metabolism of aliphatic and aromatic hydrocarbons, which may potentially contribute to the postdiagenetic oxidation and dehydrogenation of kerogen. The kerogen transformation contributes to the mobilization of fossil carbon in the form of extractable bitumen dominated by oxidized organic compounds.
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Keywords:
kerogen; shale rock; Rock-Eval; bacterial community; oxygenation; dehydrogenation
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MDPI and ACS Style
Wilamowska, A.; Koblowska, M.; Matlakowska, R. Postdiagenetic Changes in Kerogen Properties and Type by Bacterial Oxidation and Dehydrogenation. Molecules 2022, 27, 2408. https://doi.org/10.3390/molecules27082408
AMA Style
Wilamowska A, Koblowska M, Matlakowska R. Postdiagenetic Changes in Kerogen Properties and Type by Bacterial Oxidation and Dehydrogenation. Molecules. 2022; 27(8):2408. https://doi.org/10.3390/molecules27082408
Chicago/Turabian StyleWilamowska, Agnieszka, Marta Koblowska, and Renata Matlakowska. 2022. "Postdiagenetic Changes in Kerogen Properties and Type by Bacterial Oxidation and Dehydrogenation" Molecules 27, no. 8: 2408. https://doi.org/10.3390/molecules27082408
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