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学科主题: Geosciences, Multidisciplinary
题名: Rare earth elements of seep carbonates: Indication for redox variations and microbiological processes at modern seep sites
作者: [Feng, Dong ; Chen, Duofu] Chinese Acad Sci, Key Lab Marginal Sea Geol, South China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China ; [Lin, Zhijia ; Bian, Youyan ; Chen, Duofu] Chinese Acad Sci, Key Lab Marginal Sea Geol, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China ; [Peckmann, Joern] Univ Vienna, Dept Geodynam & Sedimentol, Ctr Earth Sci, A-1090 Vienna, Austria ; [Bohrmann, Gerhard] Univ Bremen, MARUM, D-28334 Bremen, Germany ; [Roberts, Harry H.] Louisiana State Univ, Inst Coastal Studies, Dept Oceanog & Coastal Sci, Baton Rouge, LA 70803 USA ; [Lin, Zhijia] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
通讯作者: cdf@gig.ac.cn
关键词: Rare earth elements ; Seep carbonates ; Redox conditions ; Methane seeps
刊名: JOURNAL OF ASIAN EARTH SCIENCES
发表日期: 2013
卷: 65, 页:27-33
部门归属: 海洋地质
资助者: The seep carbonates from the Gulf of Mexico were obtained on the cruises sponsored by the Bureau of Ocean Energy Management, Regulation and Enforcement (BOEMRE; formerly MMS). We thank F. Wang (GIG, CAS) and L. Qi (IG, CAS) for technical assistance. We thank the journal editor and anonymous reviewers for constructive comments, which considerably improved the manuscript. The research was partially supported by the Knowledge Innovation Program of CAS (KZCX2-YW-GJ03), "Hundred Talents Program" of CAS, NSF of China (91028012, 912282009), and GIGCAS 135 Project Y234021001. This study was also supported by the Deutsche Forschungsgemeinschaft through the DFG-Research Center 'The Ocean in the Earth System', Bremen.
摘要: At marine seeps, methane is microbially oxidized resulting in the precipitation of carbonates close to the seafloor. Methane oxidation leads to sulfate depletion in sediment pore water, which induces a change in redox conditions. Rare earth element (REE) patterns of authigenic carbonate phases collected from modern seeps of the Gulf of Mexico, the Black Sea, and the Congo Fan were analyzed. Different carbonate minerals including aragonite and calcite with different crystal habits have been selected for analysis. Total REE content (Sigma REE) of seep carbonates varies widely, from 0.1 ppm to 42.5 ppm, but a common trend is that the Sigma REE in microcrystalline phases is higher than that of the associated later phases including micospar, sparite and blocky cement, suggesting that Sigma REE may be a function of diagenesis. The shale-normalized REE patterns of the seep carbonates often show different Ce anomalies even in samples from a specific site, suggesting that the formation conditions of seep carbonates are variable and complex. Overall, our results show that apart from anoxic, oxic conditions are at least temporarily common in seep environments. (C) 2012 Elsevier Ltd. All rights reserved.
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000317449100005
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/11135
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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[Feng, Dong; Chen, Duofu] Chinese Acad Sci, Key Lab Marginal Sea Geol, South China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China; [Lin, Zhijia; Bian, Youyan; Chen, Duofu] Chinese Acad Sci, Key Lab Marginal Sea Geol, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China; [Peckmann, Joern] Univ Vienna, Dept Geodynam & Sedimentol, Ctr Earth Sci, A-1090 Vienna, Austria; [Bohrmann, Gerhard] Univ Bremen, MARUM, D-28334 Bremen, Germany; [Roberts, Harry H.] Louisiana State Univ, Inst Coastal Studies, Dept Oceanog & Coastal Sci, Baton Rouge, LA 70803 USA; [Lin, Zhijia] Univ Chinese Acad Sci, Beijing 100049, Peoples R China.Rare earth elements of seep carbonates: Indication for redox variations and microbiological processes at modern seep sites,JOURNAL OF ASIAN EARTH SCIENCES,2013,65():27-33
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