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GEOREF RECORD

Abiotic gas; atypical, but not rare

Giuseppe Etiope and Martin Schoell
Abiotic gas; atypical, but not rare (in Unconventional hydrocarbons, David R. Cole (editor) and Michael A. Arthur (editor))
Elements (August 2014) 10 (4): 291-296

Abstract

Abiotic gaseous hydrocarbons comprise a fascinating, but poorly understood, group of Earth fluids generated by magmatic and gas-water-rock reactions that do not directly involve organic matter. At least nine different inorganic mechanisms, including Fischer-Tropsch type reactions, occur over a wide range of temperatures. Trace amounts (typically parts per million by volume) are formed in volcanic and geothermal fluids, but considerable amounts of methane, reaching 80-90 vol%, are now recognized in an increasing number of sites in Precambrian crystalline shields and serpentinized ultramafic rocks. Surface manifestations of abiotic gas related to serpentinization release gas directly to the atmosphere in ways that are similar to seepages of ordinary biotic gas from petroliferous areas. Abiotic methane is more widespread than previously thought. It also likely exists in sites undergoing active serpentinization and may be present in petroleum systems in the vicinity of serpentinized rocks.


ISSN: 1811-5209
Serial Title: Elements
Serial Volume: 10
Serial Issue: 4
Title: Abiotic gas; atypical, but not rare
Title: Unconventional hydrocarbons
Author(s): Etiope, GiuseppeSchoell, Martin
Author(s): Cole, David R.editor
Author(s): Arthur, Michael A.editor
Affiliation: Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma 2, Rome, Italy
Affiliation: Pennsylvania State University, Department of Geosciences, University Park, PA, United States
Pages: 291-296
Published: 201408
Text Language: English
Publisher: Mineralogical Society of America and Mineralogical Society of Great Britain and Ireland and Mineralogical Association of Canada and Geochemical Society and Clay Minerals Society, International
References: 39
Accession Number: 2014-099611
Categories: Economic geology, geology of energy sourcesIgneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, sketch maps
Secondary Affiliation: Ohio State University, USA, United StatesGasConsult International, USA, United States
Country of Publication: International
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America
Update Code: 201450
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