Gas formation. Formation temperatures of thermogenic and biogenic methane.
Science
; 344(6191): 1500-3, 2014 Jun 27.
Article
en En
| MEDLINE
| ID: mdl-24970083
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 "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.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Euryarchaeota
/
Yacimiento de Petróleo y Gas
/
Metano
Idioma:
En
Revista:
Science
Año:
2014
Tipo del documento:
Article
País de afiliación:
Estados Unidos