Cited by 590Methane Hydrates and Related PhenomenaHydrocarbon exploration and reservoir analysisGeochemistry and Elemental Analysis

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Abiogenic Methane Formation and Isotopic Fractionation Under Hydrothermal Conditions

Horita, Juske, Berndt, Michael E.·1999·Science

DOI 10.1126/science.285.5430.1055

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Abstract

Recently, methane (CH 4 ) of possible abiogenic origin has been reported from many localities within Earth's crust. However, little is known about the mechanisms of abiogenic methane formation, or about isotopic fractionation during such processes. Here, a hydrothermally formed nickel-iron alloy was shown to catalyze the otherwise prohibitively slow formation of abiogenic CH 4 from dissolved bicarbonate (HCO 3 − ) under hydrothermal conditions. Isotopic fractionation by the catalyst resulted in δ 13 C values of the CH 4 formed that are as low as those typically observed for microbial methane, with similarly high CH 4 /(C 2 H 6 + C 3 H 8 ) ratios. These results, combined with the increasing recognition of nickel-iron alloy occurrence in oceanic crusts, suggest that abiogenic methane may be more widespread than previously thought.

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Authors: Horita, J., & Berndt, M. E.
Affiliations: Oak Ridge National Laboratory (US)
University of Minnesota (US)
Corresponding author: Horita, Juske
Venue: Science
Publisher: American Association for the Advancement of Science (AAAS)
Published: 1999-08-13
Volume: 285
Issue: 5430
Pages: 1055-1057
ISSN: 0036-8075 (ISSN-L)
1095-9203
DOI: 10.1126/science.285.5430.1055
OpenAlex: W1998919748
Cited by: 590
References: 42
Citations by year: 2026: 19 · 2025: 21 · 2024: 19 · 2023: 21 · 2022: 24 · 2021: 24 · 2020: 25 · 2019: 29 · 2018: 38 · 2017: 21 · 2016: 23 · 2015: 30 · 2014: 23 · 2013: 34 · 2012: 21
FWCI: 5.23
Type: journal article
Language: en
Open access: closed
Locations: Science (publishedVersion)
PubMed (publishedVersion)
Topics: Physical Sciences › Environmental Science › Environmental Chemistry › Methane Hydrates and Related Phenomena
Physical Sciences › Earth and Planetary Sciences › Geology › Hydrocarbon exploration and reservoir analysis
Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Geochemistry and Elemental Analysis
Keywords: hydrothermal conditions, bicarbonate, dissolved carbon, carbon-13, oceanic crust

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Abiogenic Methane Formation and Isotopic Fractionation Under Hydrothermal Conditions

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