Abiotic Hydrocarbons Discharge from A Felsic Rock-Hosted Hydrothermal System

How to cite: Chen, X.; Schmidt, M.; Ono, S.; Chen, C.A.; Ye, Y. Abiotic Hydrocarbons Discharge from A Felsic Rock-Hosted Hydrothermal System. Preprints 2020, 2020040475 Chen, X.; Schmidt, M.; Ono, S.; Chen, C.A.; Ye, Y. Abiotic Hydrocarbons Discharge from A Felsic Rock-Hosted Hydrothermal System. Preprints 2020, 2020040475

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MDPI and ACS Style

Chen, X.; Schmidt, M.; Ono, S.; Chen, C.A.; Ye, Y. Abiotic Hydrocarbons Discharge from A Felsic Rock-Hosted Hydrothermal System. Preprints 2020, 2020040475

APA Style

Chen, X., Schmidt, M., Ono, S., Chen, C.A., & Ye, Y. (2020). <strong>Abiotic Hydrocarbons Discharge from A Felsic Rock-Hosted Hydrothermal System</strong>. Preprints. https://doi.org/

Chicago/Turabian Style

Chen, X., Chen-Tung Arthur Chen and Ying Ye. 2020 "<strong>Abiotic Hydrocarbons Discharge from A Felsic Rock-Hosted Hydrothermal System</strong>" Preprints. https://doi.org/

Abstract

Abiogenic hydrocarbons are fundamentally important for understanding the deep microbial communities and the origin of life. The generation of abiogenic hydrocarbons was proposed to be limited to ultramafic-hosted hydrothermal systems, fueled by the serpentinization product H₂. Here, we present the discharge of short-chain alkanes from an andesitic rock-hosted Lutao geothermal field in the north Luzon arc, carrying abiotic chemical and isotopic signals. These abiogenic hydrocarbons were generated from CO₂-H₂O-rich fluid inclusions, where the long-term storage since Lutao volcanism (~ 1.3 Ma) allowed overcoming the sluggish kinetics of CO₂ to CH₄ reduction at temperatures of 174 - 206 ^oC. Natural abiogenic production of hydrocarbons, therefore, can be more ubiquitous than previously thought. The hypothesis regarding the origin of methane in Earth’s early atmosphere and its implication to the origin of life may require reconsideration.

Keywords

abiotic; hydrothermal; methane; clumped isotope

Subject

Environmental and Earth Sciences, Geochemistry and Petrology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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