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Rare earth elements in cold seep carbonates from the southwestern Dongsha area, northern South China Sea
Wang, SH; Yan, W; Chen, Z; Zhang, N; Chen, H; wyan@scsio.ac.cn
2014
发表期刊MARINE AND PETROLEUM GEOLOGY
ISSN0264-8172
卷号57页码:482-493
摘要The circulation of methane-rich fluids at cold seeps often leads to the precipitation of seep carbonates close to the seafloor along continental margins, which can be used as records of past fluid seepage. Rare earth element (REE) concentrations in seep carbonates have been used to trace fluid sources and provide information on associated biogeochemical processes at cold seeps. The REE concentrations of a series of carbonates collected from cold seeps in the southwestern Dongsha area of the northern South China Sea are analyzed in this study. The total REE contents (Sigma REE) of the seep carbonates analyzed show a wide variation from 17 ppm to 523 ppm with an average Sigma REE value of 54 ppm, which are higher than the carbonates from other cold seep areas. A positive correlation between Fe-Mn content and Sigma REE was observed. These results suggest that the seep carbonates of this study were primarily controlled by the methane-derived fluid from which they precipitated. The Fe-rich dolomite and siderite, which are the main components of the carbonates, are responsible for the enrichment of the REE. A slight positive Ce anomaly observed in the shale-normalized REE patterns of the studied seep carbonates suggests that they formed in anoxic conditions, and the correlations between Ce/Ce* and La-N/Sm-N, Ce/Ce* and Dy-N/Sm-N, Ce/Ce* and Sigma REE further reveal that the REE characteristics of most seep carbonate samples preserve the original redox conditions in which they precipitated and late diagenesis has had little effect on the REE. However, the REE characteristics of sub-samples DS2-2B, DS1-6A and DS1-7A are very different from those of the other sub-samples, indicating a greater impact of late diagenesis and post-oxidation favored REE enrichment. (C) 2014 Elsevier Ltd. All rights reserved.
部门归属[Wang, Shuhong ; Yan, Wen ; Chen, Zhong ; Zhang, Nan ; Chen, Han] Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China ; [Wang, Shuhong ; Yan, Wen ; Chen, Zhong] Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China ; [Zhang, Nan ; Chen, Han] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
关键词Rare Earth Element (Ree) Cold Seep Carbonate Redox Condition Northern South China Sea
学科领域Geology
资助者Knowledge Innovation Program of the Chinese Academy of Sciences [KZCX2-YW-GJ03-01]; National Natural Science Foundation of China [41276050, 41176052] ; Knowledge Innovation Program of the Chinese Academy of Sciences [KZCX2-YW-GJ03-01]; National Natural Science Foundation of China [41276050, 41176052] ; Knowledge Innovation Program of the Chinese Academy of Sciences [KZCX2-YW-GJ03-01]; National Natural Science Foundation of China [41276050, 41176052] ; Knowledge Innovation Program of the Chinese Academy of Sciences [KZCX2-YW-GJ03-01]; National Natural Science Foundation of China [41276050, 41176052]
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收录类别sci
资助项目海洋地质
资助者Knowledge Innovation Program of the Chinese Academy of Sciences [KZCX2-YW-GJ03-01]; National Natural Science Foundation of China [41276050, 41176052] ; Knowledge Innovation Program of the Chinese Academy of Sciences [KZCX2-YW-GJ03-01]; National Natural Science Foundation of China [41276050, 41176052] ; Knowledge Innovation Program of the Chinese Academy of Sciences [KZCX2-YW-GJ03-01]; National Natural Science Foundation of China [41276050, 41176052] ; Knowledge Innovation Program of the Chinese Academy of Sciences [KZCX2-YW-GJ03-01]; National Natural Science Foundation of China [41276050, 41176052]
WOS记录号WOS:000342530100031
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被引频次:11[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/10598
专题中科院边缘海地质重点实验室
通讯作者wyan@scsio.ac.cn
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GB/T 7714
Wang, SH,Yan, W,Chen, Z,et al. Rare earth elements in cold seep carbonates from the southwestern Dongsha area, northern South China Sea[J]. MARINE AND PETROLEUM GEOLOGY,2014,57:482-493.
APA Wang, SH,Yan, W,Chen, Z,Zhang, N,Chen, H,&wyan@scsio.ac.cn.(2014).Rare earth elements in cold seep carbonates from the southwestern Dongsha area, northern South China Sea.MARINE AND PETROLEUM GEOLOGY,57,482-493.
MLA Wang, SH,et al."Rare earth elements in cold seep carbonates from the southwestern Dongsha area, northern South China Sea".MARINE AND PETROLEUM GEOLOGY 57(2014):482-493.
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