Paleo-cold seep activity in the southern South China Sea: Evidence from the geochemical and geophysical records of sediments

doi:10.1016/j.jseaes.2017.10.022

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	Paleo-cold seep activity in the southern South China Sea: Evidence from the geochemical and geophysical records of sediments
	Li, Niu 2; Chen, Duofu 3; Zhou, Qixian ; Peng, Jie ; Yang, Xiaoqiang
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2018
卷号	168 页码:106
关键词	Cold seep Anaerobic oxidation of methane Sulfur isotope Southern South China Sea
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2017.10.022
英文摘要	Over the past decade more than 30 cold seep sites have been reported along the continental slope of the South China Sea (SCS). These seep sites have all been located in the northern SCS, and no methane seepage has been discovered in the southern SCS. Here, we report on the analysis results of the geochemical and geophysical of the marine core sediments (58S) collected from the southern continental slope of the SCS. We suggest that the sedimentary total sulfur (TS), total inorganic carbon (TIC), delta S-34(CRs) values of chromium reducible sulfur (CRS) and carbonate delta C-13(TIC) values of the bulk sediments, coupled with the ratio of (NRMAF60mT-NRMAF80mT)/NRM can be used to trace the methane release events in a methane-rich environment. At least two methane release events were identified at depths of 5.5-6.2 m and 6.8-7.2 m. Moreover, according to the characteristic of the TS/TOC and (NRMAF60mT-NRMAF80mT)/NFtM ratio of sediments, we suggest the methane flux has changed episodically. This inference is supported by the occurrence of the strongly negative carbonate delta C-13(TiC) values of bulk sediments and the positive delta S-34(CRS) values, which indicate the occurrence of anaerobic oxidation of methane (AOM) and the location of a past or present sulfate methane transition zone (SMTZ), respectively. Ultimately, these new data suggest that the combined geochemical and geophysical study of marine sediments provides a valuable tool with which to infer the temporal variations in methane seepage in a marine environment.
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/17667]
专题	南海海洋研究所_中科院边缘海地质重点实验室
作者单位	1.Shanghai Ocean Univ, Coll Marine Sci, Shanghai Engn Res Ctr Hadal Sci & Technol, Shanghai 201306, Peoples R China 2.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China 3.Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Li, Niu,Chen, Duofu,Zhou, Qixian,et al. Paleo-cold seep activity in the southern South China Sea: Evidence from the geochemical and geophysical records of sediments[J]. JOURNAL OF ASIAN EARTH SCIENCES,2018,168:106, 111.
APA	Li, Niu,Chen, Duofu,Zhou, Qixian,Peng, Jie,&Yang, Xiaoqiang.(2018).Paleo-cold seep activity in the southern South China Sea: Evidence from the geochemical and geophysical records of sediments.JOURNAL OF ASIAN EARTH SCIENCES,168,106.
MLA	Li, Niu,et al."Paleo-cold seep activity in the southern South China Sea: Evidence from the geochemical and geophysical records of sediments".JOURNAL OF ASIAN EARTH SCIENCES 168(2018):106.