Biological formation of ethane and propane in the deep marine subsurface

Autor:	Arthur J. Spivack, Kai-Uwe Hinrichs, Laura R. Hmelo, John M. Hayes, Carl G. Johnson, Nils G. Holm, Sean P. Sylva, Wolfgang Bach
Rok vydání:	2006
Předmět:	Carbon Isotopes Ethane Geologic Sediments Multidisciplinary Hydrogen Mineralogy chemistry.chemical_element Methane Propane chemistry.chemical_compound chemistry Total inorganic carbon Isotopes of carbon Environmental chemistry Physical Sciences Thermodynamics Seawater Sedimentary rock
Zdroj:	Proceedings of the National Academy of Sciences. 103:14684-14689
ISSN:	1091-6490 0027-8424
DOI:	10.1073/pnas.0606535103
Popis:	Concentrations and isotopic compositions of ethane and propane in cold, deeply buried sediments from the southeastern Pacific are best explained by microbial production of these gases in situ . Reduction of acetate to ethane provides one feasible mechanism. Propane is enriched in 13 C relative to ethane. The amount is consistent with derivation of the third C from inorganic carbon dissolved in sedimentary pore waters. At typical sedimentary conditions, the reactions yield free energy sufficient for growth. Relationships with competing processes are governed mainly by the abundance of H 2 . Production of C 2 and C 3 hydrocarbons in this way provides a sink for acetate and hydrogen but upsets the general belief that hydrocarbons larger than methane derive only from thermal degradation of fossil organic material.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c7c928683ab3ce5cbea43947fc4d5d32 https://doi.org/10.1073/pnas.0606535103 Zobrazit plný text záznamu