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Microbial methane in the shallow Paleozoic sediments and glacial deposits of Illinois, U.S.A.

Chemical Geology

By:
, , and
DOI: 10.1016/0009-2541(88)90103-9

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Abstract

Methane formed by the microbial decomposition of buried organic matter is virtually ubiquitous in the groundwaters of Illinois. Chemical and carbon isotopic compositions are reported for gas samples collected from over 200 private and municipal water wells and from 39 small gas wells completed in glacial deposits (drift-gas wells). Carbon and hydrogen isotopic data for methane, carbon dioxide and water show that these gases were formed by the carbon dioxide reduction pathway, the same mechanism which has been previously shown to be responsible for microbial methane formation in the marine environment. The isotopic composition of methane in these samples can be closely correlated with the chemical composition of the gas and with water chemistry. The data are interpreted as indicating that isotopically very light methane is found in waters where the residence time of groundwater in the methanogenesis zone was very short relative to the methane production rate. ?? 1988.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Microbial methane in the shallow Paleozoic sediments and glacial deposits of Illinois, U.S.A.
Series title:
Chemical Geology
DOI:
10.1016/0009-2541(88)90103-9
Volume
71
Issue:
1-3
Year Published:
1988
Language:
English
Publisher:
Elsevier
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Chemical Geology
First page:
23
Last page:
40