Methane formation driven by light and heat prior to the origin of life and beyond

Leonard Ernst (), Uladzimir Barayeu, Jonas Hädeler, Tobias P. Dick, Judith M. Klatt, Frank Keppler and Johannes G. Rebelein ()
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Leonard Ernst: Max Planck Institute for Terrestrial Microbiology
Uladzimir Barayeu: German Cancer Research Center (DKFZ), DKFZ-ZMBH Alliance
Jonas Hädeler: Heidelberg University
Tobias P. Dick: German Cancer Research Center (DKFZ), DKFZ-ZMBH Alliance
Judith M. Klatt: Center for Synthetic Microbiology (SYNMIKRO)
Frank Keppler: Heidelberg University
Johannes G. Rebelein: Max Planck Institute for Terrestrial Microbiology

Nature Communications, 2023, vol. 14, issue 1, 1-10

Abstract: Abstract Methane is a potent greenhouse gas, which likely enabled the evolution of life by keeping the early Earth warm. Here, we demonstrate routes towards abiotic methane and ethane formation under early-earth conditions from methylated sulfur and nitrogen compounds with prebiotic origin. These compounds are demethylated in Fenton reactions governed by ferrous iron and reactive oxygen species (ROS) produced by light and heat in aqueous environments. After the emergence of life, this phenomenon would have greatly intensified in the anoxic Archean by providing methylated sulfur and nitrogen substrates. This ROS-driven Fenton chemistry can occur delocalized from serpentinization across Earth’s humid realm and thereby substantially differs from previously suggested methane formation routes that are spatially restricted. Here, we report that Fenton reactions driven by light and heat release methane and ethane and might have shaped the chemical evolution of the atmosphere prior to the origin of life and beyond.

Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-39917-0

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DOI: 10.1038/s41467-023-39917-0

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