Multiple Sulfur Isotopes of Iron Sulfides From Thick Greigite-Bearing Sediments Indicate Anaerobic Oxidation and Possible Leakages of Coastal Methane

doi:10.1029/2023GL103303

	Yu, Xiaoxiao 1,2; Mei, Xi 3; Liu, Jianxing 4,5; Lin, Jiarui 1,2,6; Wei, Gangjian1,2 ; Shi, Xuefa 4,5; Bai, Jianghao 1,2,6; Lin, Mang 1,2,6
	Multiple Sulfur Isotopes of Iron Sulfides From Thick Greigite-Bearing Sediments Indicate Anaerobic Oxidation and Possible Leakages of Coastal Methane
Source Publication	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
	2023-08-28
Volume	50 Issue:16 Pages:11
DOI	10.1029/2023GL103303
Language	英语
WOS Research Area	Geology
Abstract	Magnetic greigite may be a valuable indicator for methane emissions in the geological past, if its formation pathway and diagenetic environment can be unambiguously defined. Here, we investigate sulfur isotopic compositions of iron sulfides and ferrous iron concentrations of thick greigite-bearing sediments (TGBSs) in the South Yellow Sea, a shallow marginal sea with strong methane emissions. For the first time, isotopically heavy iron sulfides (up to 28.7%0 in delta S-34 and 0.19%0 in Delta S-33) and enrichments of ferrous iron in the TGBSs are observed. We interpret the data as indicating synchronic occurrences of anaerobic oxidation of methane coupled to sulfate and iron reductions, which occur in coastal methanic zones with limited sulfate availability and therefore probably imply leakages of methane. Consequently, we suggest that greigite is a promising geological indicator for tracing methane liberated from coastal sediments, accounting for similar to 60% of the currently rising global marine methane budget.
Keyword	greigite pyrite multiple sulfur isotopes coastal methane South Yellow Sea AOM-SR
WOS ID	WOS:001057745900002
Indexed By	SCI
Citation statistics	Cited Times:2[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.gig.ac.cn/handle/344008/74793
Collection	同位素地球化学国家重点实验室
Corresponding Author	Liu, Jianxing; Lin, Mang
Affiliation	1.Chinese Acad Sci, State Key Lab Isotope Geochem, Guangzhou Inst Geochem, Guangzhou, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Ctr Excellence Deep Earth Sci, Guangzhou, Peoples R China 3.China Geol Survey, Qingdao Inst Marine Geol, Qingdao 266071, Peoples R China 4.Minist Nat Resources, Inst Oceanog 1, Key Lab Marine Geol & Metallogeny, Qingdao, Peoples R China 5.Pilot Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China 6.Univ Chinese Acad Sci, Beijing, Peoples R China
Recommended Citation GB/T 7714	Yu, Xiaoxiao,Mei, Xi,Liu, Jianxing,et al. Multiple Sulfur Isotopes of Iron Sulfides From Thick Greigite-Bearing Sediments Indicate Anaerobic Oxidation and Possible Leakages of Coastal Methane[J]. GEOPHYSICAL RESEARCH LETTERS,2023,50(16):11.
APA	Yu, Xiaoxiao.,Mei, Xi.,Liu, Jianxing.,Lin, Jiarui.,Wei, Gangjian.,...&Lin, Mang.(2023).Multiple Sulfur Isotopes of Iron Sulfides From Thick Greigite-Bearing Sediments Indicate Anaerobic Oxidation and Possible Leakages of Coastal Methane.GEOPHYSICAL RESEARCH LETTERS,50(16),11.
MLA	Yu, Xiaoxiao,et al."Multiple Sulfur Isotopes of Iron Sulfides From Thick Greigite-Bearing Sediments Indicate Anaerobic Oxidation and Possible Leakages of Coastal Methane".GEOPHYSICAL RESEARCH LETTERS 50.16(2023):11.

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