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Pyrite formation from FeS and H<sub>2</sub>S is mediated through microbial redox activity

Pyrite formation from FeS and H2S is mediated through microbial redox activity

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THIEL, Joana, James M. BYRNE, Andreas KAPPLER, Bernhard SCHINK, Michael PESTER, 2019. Pyrite formation from FeS and H2S is mediated through microbial redox activity. In: Proceedings of the National Academy of Sciences of the United States of America (PNAS). 116(14), pp. 6897-6902. ISSN 0027-8424. eISSN 1091-6490. Available under: doi: 10.1073/pnas.1814412116

@article{Thiel2019-04-02Pyrit-46517, title={Pyrite formation from FeS and H2S is mediated through microbial redox activity}, year={2019}, doi={10.1073/pnas.1814412116}, number={14}, volume={116}, issn={0027-8424}, journal={Proceedings of the National Academy of Sciences of the United States of America (PNAS)}, pages={6897--6902}, author={Thiel, Joana and Byrne, James M. and Kappler, Andreas and Schink, Bernhard and Pester, Michael} }

Pyrite is the most abundant iron−sulfur mineral in sediments. Over geological times, its burial controlled oxygen levels in the atmosphere and sulfate concentrations in seawater. However, the mechanism of pyrite formation in sediments is still being debated. We show that lithotrophic microorganisms can mediate the transformation of FeS and H<sub>2</sub>S to FeS<sub>2</sub> at ambient temperature if metabolically coupled to methane-producing archaea. Our results provide insights into a metabolic relationship that could sustain part of the deep biosphere and lend support to the iron−sulfur-world theory that postulated FeS transformation to FeS<sub>2</sub> as a key energy-delivering reaction for life to emerge. Thiel, Joana Schink, Bernhard 2019-07-24T12:41:45Z Kappler, Andreas 2019-04-02 Pester, Michael Pester, Michael terms-of-use 2019-07-24T12:41:45Z Byrne, James M. Kappler, Andreas Byrne, James M. Schink, Bernhard Thiel, Joana Pyrite formation from FeS and H<sub>2</sub>S is mediated through microbial redox activity eng

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