Origin of light hydrocarbon gases from the Matsukawa geothermal area in Japan

Kiyosu, Yasuhiro; Asada, Noriko; Yoshida, Yutaka

doi:10.1016/s0009-2541(10)80034-8

Cited by 18 publications

(3 citation statements)

References 21 publications

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“…[]; (15) Karzhavin and Vendillo []; (16) Samson and Williamson‐Jones [] (17) Cesare []; (18) Andersen and Burke []; (19) Potter and Konnerup‐Madsen []; (20) Giggenbach []; (21) Kiyosu et al . []; (22) Holloway []; (23) Kenney et al . []; (24) McCollom []; (25) Giardini and Salotti []; (26) Reller et al .…”

Section: Classification Of Abiotic Origins Of Ch4mentioning

confidence: 99%

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Abiotic Methane on Earth

Etiope

Lollar

2013

Reviews of Geophysics

501

437

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[1] Over the last 30 years, geochemical research has demonstrated that abiotic methane (CH 4 ), formed by chemical reactions which do not directly involve organic matter, occurs on Earth in several specific geologic environments. It can be produced by either high-temperature magmatic processes in volcanic and geothermal areas, or via low-temperature (<100 C) gas-water-rock reactions in continental settings, even at shallow depths. The isotopic composition of C and H is a first step in distinguishing abiotic from biotic (including either microbial or thermogenic) CH 4 . Herein we demonstrate that integrated geochemical diagnostic techniques, based on molecular composition of associated gases, noble gas isotopes, mixing models, and a detailed knowledge of the geologic and hydrogeologic context are necessary to confirm the occurrence of abiotic CH 4 in natural gases, which are frequently mixtures of multiple sources. Although it has been traditionally assumed that abiotic CH 4 is mainly related to mantle-derived or magmatic processes, a new generation of data is showing that low-temperature synthesis related to gas-water-rock reactions is more common than previously thought. This paper reviews the major sources of abiotic CH 4 and the primary approaches for differentiating abiotic from biotic CH 4, including novel potential tools such as clumped isotope geochemistry. A diagnostic approach for differentiation is proposed.

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Section: Classification Of Abiotic Origins Of Ch4mentioning

confidence: 99%

“…These reactions are typically identified in geothermal systems [ Giggenbach , ; Kiyosu et al ., ]. Giggenbach [] is a fundamental work which describes chemical and isotopic equilibria between CO 2 and CH 4 under these postmagmatic conditions.…”

Section: Classification Of Abiotic Origins Of Ch4mentioning

confidence: 99%

Abiotic Methane on Earth

Etiope

Lollar

2013

Reviews of Geophysics

501

437

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“…A large number of studies have highlighted the existence of light hydrocarbons (C 1 ‐C 10 ), mainly pertaining to the alkane, alkene and aromatic groups, in fluids discharged from volcanic‐hydrothermal systems [ Des Marais et al , 1981; Welhan and Lupton , 1987; Porshnev and Bondarev , 1989; Giggenbach et al , 1990; Mangani et al , 1991; Giggenbach and Corrales ‐ Soto , 1992; Kiyosu et al , 1992; Capaccioni et al , 1993, 1995, 2001, 2004; Seewald , 1994; Sugisaki and Nagamine , 1995; Darling , 1998; Capaccioni and Mangani , 2001; Burnett et al , 2003; Taran and Giggenbach , 2003; Fiebig et al , 2009; Tassi et al , 2007, 2009a, 2009b, 2010a, 2010b]. Global methane emissions from volcanoes and other natural and anthropogenic sources estimated by Etiope et al [2008] were used to calculate those of other alkanes, such as ethane and propane [ Etiope and Ciccioli , 2009], which resulted up to 6 Tg year −1 , i.e., significantly lower than the emission fluxes (∼16 Tg year −1 ) required to explain the present atmospheric amounts of these gas species [ Rudolph , 1995].…”

Section: Introductionmentioning

confidence: 99%

Geogenic and atmospheric sources for volatile organic compounds in fumarolic emissions from Mt. Etna and Vulcano Island (Sicily, Italy)

et al. 2012

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In this paper, fluid source(s) and processes controlling the chemical composition of volatile organic compounds (VOCs) in gas discharges from Mt. Etna and Vulcano Island (Sicily, Italy) were investigated. The main composition of the Etnean and Volcano gas emissions is produced by mixing, to various degrees, of magmatic and hydrothermal components. VOCs are dominated by alkanes, alkenes and aromatics, with minor, though significant, concentrations of O‐, S‐ and Cl(F)‐substituted compounds. The main mechanism for the production of alkanes is likely related to pyrolysis of organic‐matter‐bearing sediments that interact with the ascending magmatic fluids. Alkanes are then converted to alkene and aromatic compounds via catalytic reactions (dehydrogenation and dehydroaromatization, respectively). Nevertheless, an abiogenic origin for the light hydrocarbons cannot be ruled out. Oxidative processes of hydrocarbons at relatively high temperatures and oxidizing conditions, typical of these volcanic‐hydrothermal fluids, may explain the production of alcohols, esters, aldehydes, as well as O‐ and S‐bearing heterocycles. By comparing the concentrations of hydrochlorofluorocarbons (HCFCs) in the fumarolic discharges with respect to those of background air, it is possible to highlight that they have a geogenic origin likely due to halogenation of both methane and alkenes. Finally, chlorofluorocarbon (CFC) abundances appear to be consistent with background air, although the strong air contamination that affects the Mt. Etna fumaroles may mask a possible geogenic contribution for these compounds. On the other hand, no CFCs were detected in the Vulcano gases, which are characterized by low air contribution. Nevertheless, a geogenic source for these compounds cannot be excluded on the basis of the present data.

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Evolution of light hydrocarbon gases in subsurface processes: Constraints from chemical equilibrium

Sugisaki

Nagamine

1995

Earth and Planetary Science Letters

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Origin of light hydrocarbon gases from the Matsukawa geothermal area in Japan

Cited by 18 publications

References 21 publications

Abiotic Methane on Earth

Abiotic Methane on Earth

Geogenic and atmospheric sources for volatile organic compounds in fumarolic emissions from Mt. Etna and Vulcano Island (Sicily, Italy)

Evolution of light hydrocarbon gases in subsurface processes: Constraints from chemical equilibrium

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