Abiogenic formation of alkanes in the Earth's crust as a minor source for global hydrocarbon reservoirs

  title={Abiogenic formation of alkanes in the Earth's crust as a minor source for global hydrocarbon reservoirs},
  author={Barbara Sherwood Lollar and Timothy David Westgate and Jack A. Ward and Gregory F. Slater and Georges Lacrampe-Couloume},
Natural hydrocarbons are largely formed by the thermal decomposition of organic matter (thermogenesis) or by microbial processes (bacteriogenesis). But the discovery of methane at an East Pacific Rise hydrothermal vent and in other crustal fluids supports the occurrence of an abiogenic source of hydrocarbons. These abiogenic hydrocarbons are generally formed by the reduction of carbon dioxide, a process which is thought to occur during magma cooling and—more commonly—in hydrothermal systems… Expand
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Methane from microbial hydrogenolysis of sediment organic matter before the Great Oxidation Event
  • Xinyu Xia, Yongli Gao
  • Medicine
  • Nature communications
  • 2021
The recognition of Archean microbial methane in this work reveals a biochemical process of greenhouse gas generation before the Great Oxidation Event and improves the understanding of the carbon and hydrogen geochemical cycles. Expand
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Abstract Both hydrogen and methane are consistently discharged in large quantities in hydrothermal fluids issued from ultramafic-hosted hydrothermal fields discovered along the Mid-Atlantic Ridge.Expand
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Abstract We examined the carbon isotopic and molecular compositions of residual gases within Miocene methane-derived carbonates collected in Japan. Methane, ethane, and propane were extracted by acidExpand


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The concept that aqueous CO2 can be reduced to hydrocarbons abiotically during serpentinization of olivine has become widespread in the earth and planetary sciences. This process has been invoked toExpand
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