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Formation temperatures of thermogenic and biogenic methane

Stolper, D. A. and Lawson, M. and Davis, C. L. and Ferreira, A. A. and Santos Neto, E. V. and Ellis, G. S. and Lewan, M. D. and Martini, A. M. and Tang, Y. and Schoell, M. and Sessions, A. L. and Eiler, J. M. (2014) Formation temperatures of thermogenic and biogenic methane. Science, 344 (6191). pp. 1500-1503. ISSN 0036-8075. doi:10.1126/science.1254509.

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Methane is an important greenhouse gas and energy resource generated dominantly by methanogens at low temperatures and through the breakdown of organic molecules at high temperatures. However, methane-formation temperatures in nature are often poorly constrained. We measured formation temperatures of thermogenic and biogenic methane using a “clumped isotope” technique. Thermogenic gases yield formation temperatures between 157° and 221°C, within the nominal gas window, and biogenic gases yield formation temperatures consistent with their comparatively lower-temperature formational environments (<50°C). In systems where gases have migrated and other proxies for gas-generation temperature yield ambiguous results, methane clumped-isotope temperatures distinguish among and allow for independent tests of possible gas-formation models.

Item Type:Article
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URLURL TypeDescription material
Stolper, D. A.0000-0003-3299-3177
Sessions, A. L.0000-0001-6120-2763
Additional Information:© 2014 American Association for the Advancement of Science. Received for publication 8 April 2014. Accepted for publication 2 June 2014 This work was supported by the NSF, Petrobras, ExxonMobil, and Caltech. We thank Petrobras and ExxonMobil for providing samples and permission to publish and C. Araújo and B. Peterson for helpful discussions. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. All data used to support the conclusions in this manuscript are provided in the Supplementary Materials. SUPPLEMENTARY MATERIALS Materials and Methods Supplementary Text Figs. S1 to S5 Tables S1 to S6 References (41–63)
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Issue or Number:6191
Record Number:CaltechAUTHORS:20140604-103128643
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46072
Deposited By: George Porter
Deposited On:26 Jun 2014 18:20
Last Modified:10 Nov 2021 17:20

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