Origin of the natural gas seep of Çirali (Chimera), Turkey: Site of the first Olympic fire

Hoşgörmez, Hakan

doi:10.1016/j.jseaes.2006.08.002

Cited by 51 publications

(59 citation statements)

References 37 publications

(49 reference statements)

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“…Analyses of methane in these samples yielded relatively high bulk δ 13 C and δD values (−11‰ and −119‰, Table C.2) consistent with those previously reported for the same site (Hosgörmez, 2007;Hosgormez et al, 2008;Etiope et al, 2011b). The δ 13 C values lie outside the typical range of known thermogenic methane (up to −20‰), and δD values are close to those required for D/H equilibrium with water of SMOW-like hydrogen-isotope composition at temperatures upwards of ca.…”

Section: C4 Errata and Corrigenda To Published Articlessupporting

confidence: 85%

The geochemistry of methane isotopologues

Wang¹

2017

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This thesis documents the origin, distribution, and fate of methane and several of its isotopic forms on Earth. Using observational, experimental, and theoretical approaches, I illustrate how the relative abundances of 12 CH 4 , 13 CH 4 , 12 CH 3 D, and 13 CH 3 D record the formation, transport, and breakdown of methane in selected settings.Chapter 2 reports precise determinations of 13 CH 3 D, a "clumped" isotopologue of methane, in samples collected from various settings representing many of the major sources and reservoirs of methane on Earth. The results show that the information encoded by the abundance of 13 CH 3 D enables differentiation of methane generated by microbial, thermogenic, and abiogenic processes. A strong correlation between clumped-and hydrogen-isotope signatures in microbial methane is identified and quantitatively linked to the availability of H 2 and the reversibility of microbially-mediated methanogenesis in the environment. Determination of 13 CH 3 D in combination with hydrogen-isotope ratios of methane and water provides a sensitive indicator of the extent of C-H bond equilibration, enables fingerprinting of methane-generating mechanisms, and in some cases, supplies direct constraints for locating the waters from which migrated gases were sourced. Chapter 3 applies this concept to constrain the origin of methane in hydrothermal fluids from sediment-poor vent fields hosted in mafic and ultramafic rocks on slow-and ultraslow-spreading mid-ocean ridges. The data support a hypogene model whereby methane forms abiotically within plutonic rocks of the oceanic crust at temperatures above ca. 300• C during respeciation of magmatic volatiles, and is subsequently extracted during active, convective hydrothermal circulation. Chapter 4 presents the results of culture experiments in which methane is oxidized in the presence of O 2 by the bacterium Methylococcus capsulatus strain Bath. The results show that the clumped isotopologue abundances of partially-oxidized methane can be predicted from knowledge of 13 C/ 12 C and D/H isotope fractionation factors alone.: Shuhei Ono, Ph.D. Acknowledgments I fear that this section will not do justice to the people I have not the space to thank individually. Alas, here goes. To those whose names are not specifically listed here, thank you too. I wish first to thank Shuhei Ono. The work this thesis represents could not have happened without his bold vision and the license to explore and question that working in his lab afforded. His unbridled optimism, breadth of scientific curiosity, personal integrity, and accessibility to his personnel are traits I one day hope to emulate. I thank him for his nonjudgmental yet appropriately measured support of many of my ideas-even those that led nowhere-, for believing in me even when I found it difficult to do so myself, and for teaching me to change pump oil, build vacuum lines, and drink Icelandic vodka.I also wish to thank my thesis committee members Jeff Seewald, Roger Summons, and John Pohlman, for their in...

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Section: C4 Errata and Corrigenda To Published Articlessupporting

confidence: 85%

The geochemistry of methane isotopologues

Wang¹

2017

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“…δ 13 C 1 <δ 13 C 2 <δ 13 C 3 <δ 13 C 4 ), which is a typical characteristic of gases to be organic origin (Fuex, 1977;Dai et al, 2004Dai et al, , 2009d Dai et al, 1992;Hosgörmez, 2007). Most of the alkane gases of tight sandstone gases in China have a normal order type of carbon isotopic composition indicating that most of the tight sandstone gases in China are organic origin.…”

Section: Stable Carbon Isotopic Characteristicsmentioning

confidence: 98%

Stable Carbon Isotopic Characteristics of Alkane Gases in Tight Sandstone Gas Fields and the Gas Source in China

Huang

Gong

et al. 2014

Energy Exploration & Exploitation

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Significant achievements have been obtained in tight sandstone gas exploration in China. At present, tens of tight sandstone gas pools have been discovered in the Ordos basin, the Sichuan basin, the Bohai Bay basin, the Tarim basin, and the Turpan-Harmi basin in China. This study examines the gas components and the stable carbon isotope data of 150 tight sandstone gas samples collected from the main petroliferous basins in China. Tight sandstone gas in China is dominated in alkane gases, and the contents of methane and its homologues decrease with increasing of the carbon number. Major part of the tight sandstone gas have the characteristic of normal stable carbon isotope series (i.e., δ 13 C 1 <δ 13 C 2 <δ 13 C 3 <δ 13 C 4 ), whereas the rest show a partial reversal, and the reversals between ethane and propane are in dominant (δ 13 C 2 >δ 13 C 3 ). Most of the sandstone gases are coal-derived gas, and mixing of gases from the same humic source but different maturity or from different humic sources caused the partially reversal of the carbon isotopic values. The major part of the tight sandstone gas pools are self-generation and self-accumulation reservoirs formed in coal measures, and the coal measures are the favorable field in tight sandstone gas exploration in China.

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“…Burning vapour flaring out of the ground has been a cause for marvel or even veneration for centuries (Aminzadeh et al, 2001;Berge, 2011Berge, , 2013Dumas, 1859;Etiope, 2010;Etiope et al, 2013aEtiope et al, , 2013bForbes, 1939Forbes, , 1958Galetti, 2005;Hosgormez, 2007;Hosgormez et al, 2008;Ingersoll, 1996;Jackson, 1911;Kamali and Rezaee, 2012;Ker Porter, 1822;Le Strange, 1905;Lockhart, 1939;Marvin, 1884;Pliny, c. 77;Spulber, 2010;Strabo, 7 BC;Thwaite, 1889;Verma et al, 2004;Waples, 2012, Pages 7-9;Yergin, 1991;Ziegler, 1920); however, the widespread use of Natural Gas as an energy fuel only came about after gas manufactured from coal and other feedstocks had become commonplace (Tarr, 2009).…”

Section: Eternal Flamesmentioning

confidence: 99%

Renewable Gas

Abbess¹

2015

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Origin of the natural gas seep of Çirali (Chimera), Turkey: Site of the first Olympic fire

Cited by 51 publications

References 37 publications

The geochemistry of methane isotopologues

The geochemistry of methane isotopologues

Stable Carbon Isotopic Characteristics of Alkane Gases in Tight Sandstone Gas Fields and the Gas Source in China

Renewable Gas

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