Geochemical Evidence of Metal-Driven Anaerobic Oxidation of Methane in the Shenhu Area, the South China Sea

doi:10.3390/ijerph16193559

	Geochemical Evidence of Metal-Driven Anaerobic Oxidation of Methane in the Shenhu Area, the South China Sea
	Xie, Rui 1,2,3; Wu, Daidai 1,2,4; Liu, Jie 1,2; Sun, Tiantian 1; Liu, Lihua 1; Wu, Nengyou 4,5
刊名	INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
	2019-10-01
卷号	16 期号:19 页码:17
关键词	sulfate-drive methane anaerobic oxidation metal-drive methane anaerobic oxidation gas hydrate Shenhu area
DOI	10.3390/ijerph16193559
通讯作者	Wu, Daidai(wudd@ms.giec.ac.cn)
英文摘要	Anaerobic oxidation of methane (AOM) is a common biochemical process in the ocean and it plays an important role in global climate change, elemental circulation, and atmospheric evolution over geological time. In this paper, we analyzed of delta S-34, Fe, Mn, Ca/Ti, and Sr/Ti ratios, and the date of carbon and sulfur from the site SH3 of Shenhu area. Result showed that (1) 0-6 mbsf (meter blow the sea floor) was mainly affected by OSR (anaerobic oxidation of organic matters) and 7-15 mbsf was a paleo-SMTZ (sulfate-methane transition zone) position. The modern SMTZ was mainly distributed at 19-25 mbsf. The barium sulfate precipitation above the modern SMTZ indicating that the current methane leakage was stable and lasted longer during geological history. (2) By studying the change of magnetic and the different carbonate minerals, results showed that there were two AOM stages. During the early stage, Fe2+ were mainly produced by sulfide abiotic reductive dissolution. During the later stage, Fe2+ were mainly produced by the metal-AOM. (3) Study of the mineral characteristics of the paleo-SMTZ and the modern SMTZ showed that the modern SMTZ carbonate minerals were mainly low-Mg calcite and aragonite, while the paleo-SMTZ carbon minerals were mainly high Mg minerals. The reason for this difference is that the modern SMTZ layer was only experienced the first stage of anaerobic oxidation of methane. In the paleo-SMTZ layer, it has experienced two stage of anaerobic oxidation of methane. During the last stage of metal-AOM, the low Mg carbonate minerals were converted into high Mg carbonate minerals. This research confirms the presence of metal-driven methane anaerobic oxidation at the bottom of sulfate-driven methane anaerobic oxidation and during the metal-driven methane anaerobic oxidation, methane and metal oxides or hydroxides would couple to convert the in situ metal oxides or hydroxides into metal ions, meanwhile the phosphorus adsorbed on the surface of the metal oxides is released into adjacent pore water, and convert to new P-bearing minerals under suitable conditions.
资助项目	Municipal Science and Technology Program of Guangzhou[201904010311] ; Institution of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences[ISEE2018YB03] ; Laboratory for Marine Mineral Resources, Pilot National Laboratory for Marine Sciences and Technology (Qingdao)[KC201703]
WOS关键词	NATURAL-GAS HYDRATE ; RARE-EARTH-ELEMENTS ; AUTHIGENIC CARBONATES ; PORE-WATER ; SHALLOW SEDIMENTS ; CONTINENTAL-SLOPE ; ISOTOPIC EVIDENCE ; FLUID SOURCES ; DONGSHA AREA ; SEISMIC DATA
WOS研究方向	Environmental Sciences & Ecology ; Public, Environmental & Occupational Health
语种	英语
出版者	MDPI
WOS记录号	WOS:000494748600055
资助机构	Municipal Science and Technology Program of Guangzhou ; Institution of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences ; Laboratory for Marine Mineral Resources, Pilot National Laboratory for Marine Sciences and Technology (Qingdao)
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/26211]
专题	中国科学院广州能源研究所
通讯作者	Wu, Daidai
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China 2.Chinese Acad Sci, Inst South China Sea Ecol & Environm Engn, Guangzhou 510301, Guangdong, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Mineral Resources, Qingdao 266071, Shandong, Peoples R China 5.Qingdao Inst Marine Geol, Key Lab Gas Hydrate, Minist Nat Resources, Qingdao 266071, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Xie, Rui,Wu, Daidai,Liu, Jie,et al. Geochemical Evidence of Metal-Driven Anaerobic Oxidation of Methane in the Shenhu Area, the South China Sea[J]. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH,2019,16(19):17.
APA	Xie, Rui,Wu, Daidai,Liu, Jie,Sun, Tiantian,Liu, Lihua,&Wu, Nengyou.(2019).Geochemical Evidence of Metal-Driven Anaerobic Oxidation of Methane in the Shenhu Area, the South China Sea.INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH,16(19),17.
MLA	Xie, Rui,et al."Geochemical Evidence of Metal-Driven Anaerobic Oxidation of Methane in the Shenhu Area, the South China Sea".INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 16.19(2019):17.