Item talk:Q237281

From geokb

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   "name": "Formation temperatures of thermogenic and biogenic methane",
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   "abstract": "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 \u201cclumped isotope\u201d technique. Thermogenic gases yield formation temperatures between 157\u00b0 and 221\u00b0C, within the nominal gas window, and biogenic gases yield formation temperatures consistent with their comparatively lower-temperature formational environments (<50\u00b0C). 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.",
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