Formation of carbonate pipes in the northern Okinawa Trough linked to strong sulfate exhaustion and iron supply

doi:10.1016/j.gca.2017.02.010

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院地球与行星物理重点实验室

	Formation of carbonate pipes in the northern Okinawa Trough linked to strong sulfate exhaustion and iron supply
	Peng, Xiaotong 1; Guo, Zixiao 1,2; Chen, Shun 1; Sun, Zhilei 3; Xu, Hengchao 1; Ta, Kaiwen 1; Zhang, Jianchao 4; Zhang, Lijuan 5; Li, Jiwei 1; Du, Mengran 1
刊名	GEOCHIMICA ET COSMOCHIMICA ACTA
	2017-05-15
卷号	205 页码:1-13
关键词	Carbonate pipe Sulfate-driven AOM Pyrite Fe-driven AOM Okinawa Trough
ISSN号	0016-7037
DOI	10.1016/j.gca.2017.02.010
文献子类	Article
英文摘要	The microbial anaerobic oxidation of methane (AOM), a key biogeochemical process that consumes substantial amounts of methane produced in seafloor sediments, can lead to the formation of carbonate deposits at or beneath the sea floor. Although Fe oxide-driven AOM has been identified in cold seep sediments, the exact mode by which it may influence the formation of carbonate deposits remains poorly understood. Here, we characterize the morphology, petrology and geochemistry of a methane-derived Fe-rich carbonate pipe in the northern Okinawa Trough (OT). We detect abundant authigenic pyrites, as well as widespread trace Fe, within microbial mat-like carbonate veins in the pipe. The in situ delta S-34 values of these pyrites range from - 3.9 to 31.6% (VCDT), suggesting a strong consumption of seawater sulfate by sulfate-driven AOM at the bottom of sulfate reduction zone. The positive d 56 Fe values of pyrite and notable enrichment of Fe in the OT pipe concurrently indicate that the pyrites are primarily derived from Fe oxides in deep sediments. We propose that the Fe-rich carbonate pipe formed at the bottom of sulfate reduction zone, below which Fe-driven AOM, rather than Fe-oxide reduction coupled to organic matter degradation, might be responsible for the abundantly available Fe(2+)in the fluids from which pyrites precipitated. The Fe-rich carbonate pipe described in this study probably represents the first fossil example of carbonate deposits linked to Fe-driven AOM. Because Fe-rich carbonate deposits have also been found at other cold seeps worldwide, we infer that similar processes may play an essential role in biogeochemical cycling of sub-seafloor methane and Fe at continental margins. (C) 2017 Elsevier Ltd. All rights reserved.
WOS关键词	ANAEROBIC METHANE OXIDATION ; SOUTH CHINA SEA ; GULF-OF-MEXICO ; COLD-SEEP CARBONATES ; BLACK-SEA ; AUTHIGENIC CARBONATES ; CONTINENTAL-SLOPE ; SEDIMENTARY PYRITE ; MARINE-SEDIMENTS ; ISOTOPE ANALYSIS
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000402487700001
资助机构	Strategic Priority Research Program of the Chinese Academy of Sciences(XDB06020000) ; National Key Basic Research Program of China(2015CB755905 ; 2013CB429703) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB06020000) ; National Key Basic Research Program of China(2015CB755905 ; 2013CB429703) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB06020000) ; National Key Basic Research Program of China(2015CB755905 ; 2013CB429703) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB06020000) ; National Key Basic Research Program of China(2015CB755905 ; 2013CB429703)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/52886]
专题	地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者	Guo, Zixiao
作者单位	1.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Deep Sea Sci Div, Sanya 572000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Minist Land & Resources, Qingdao Inst Marine Geol, Qingdao 266071, Peoples R China 4.Chinese Acad Sci, Key Lab Earth & Planetary Phys, Inst Geol & Geophys, Beijing 100029, Peoples R China 5.Chinese Acad Sci, Shanghai Synchrotron Radiat Facil, Shanghai Inst Appl Phys, Shanghai 219250, Peoples R China
推荐引用方式 GB/T 7714	Peng, Xiaotong,Guo, Zixiao,Chen, Shun,et al. Formation of carbonate pipes in the northern Okinawa Trough linked to strong sulfate exhaustion and iron supply[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2017,205:1-13.
APA	Peng, Xiaotong.,Guo, Zixiao.,Chen, Shun.,Sun, Zhilei.,Xu, Hengchao.,...&Du, Mengran.(2017).Formation of carbonate pipes in the northern Okinawa Trough linked to strong sulfate exhaustion and iron supply.GEOCHIMICA ET COSMOCHIMICA ACTA,205,1-13.
MLA	Peng, Xiaotong,et al."Formation of carbonate pipes in the northern Okinawa Trough linked to strong sulfate exhaustion and iron supply".GEOCHIMICA ET COSMOCHIMICA ACTA 205(2017):1-13.