Molecular and stable carbon isotopic compositions of hopanoids in seep carbonates from the South China Sea continental slope

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	Molecular and stable carbon isotopic compositions of hopanoids in seep carbonates from the South China Sea continental slope
	Guan, Hongxiang 1; Sun, Yongge 2; Mao, Shengyi 1,3; Zhu, Xiaowei 1,3; Wu, Nengyou 1,3
刊名	journal of asian earth sciences
	2014-10-01
卷号	92 页码:254-261
关键词	Hopanoids Methanotrophy Seep carbonates South China Sea
英文摘要	the lipid biomarkers of hopanoids in cold seep carbonates from the south china sea continental slope were investigated by gas chromatography mass spectrometer (gc ms) and gas chromatography-isotope ratio-mass spectrometer (gc-ir-ms). the distribution of hopanes/hopenes shows a preference for the 'biological' 17 beta(h), 21 beta(h)-over the 'geological' 17 alpha(h), 21 beta(h)-configuration. this interpretation is in agreement with the strong odd even preference of long-chain n-alkanes in those samples, suggesting that the beta beta hopanes may be the early cliagenetic products of biohopanoids and the alpha beta, beta alpha configurations of hopanes were mainly derived from allochthonous sources contributing to the organic matter of the carbonates. in terms of hopanoid acids, the c-30 to c-33-17 beta(h), 21 beta(h)-hopanoid acids were detected with c-32 17 beta(h), 21 beta(h)-hopanoid acid being the most abundant. however, there is a significant difference in stable carbon isotopic compostions of the c-32 17 beta(h), 21 beta(h)-hopanoic acid among samples (-30.7 parts per thousand to -69.8 parts per thousand). the delta c-13 values match well with the carbon isotopic compositions of srb-derived iso-lanteisoc(15:0) fatty acids in the samples, which strongly depend on the carbon utilization types by microbe. the most abundant compound of hopanols detected in the samples, c-30-17 beta(h), 21 beta(h)-hopanol, may be a good indicator of diagenetic product of type i methanotrophs. the molecular and carbon isotopic compositions of hopanoids demonstrate clearly that there is a combination contribution of both srb and type i or type x methanotrophs to the source organism in the seep carbonates from the south china sea continental slope. 2013 elsevier ltd. all rights reserved.
WOS标题词	science & technology ; physical sciences
类目[WOS]	geosciences, multidisciplinary
研究领域[WOS]	geology
关键词[WOS]	gulf-of-mexico ; black-sea ; anaerobic oxidation ; authigenic carbonates ; methanotrophic consortia ; methane oxidation ; natural-products ; early diagenesis ; cold seeps ; priest-pot
收录类别	SCI
语种	英语
WOS记录号	WOS:000341554100018
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/10754]
专题	中国科学院广州能源研究所
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy & Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China 2.Zhejiang Univ, Dept Earth Sci, Hangzhou 310027, Zhejiang, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Guan, Hongxiang,Sun, Yongge,Mao, Shengyi,et al. Molecular and stable carbon isotopic compositions of hopanoids in seep carbonates from the South China Sea continental slope[J]. journal of asian earth sciences,2014,92:254-261.
APA	Guan, Hongxiang,Sun, Yongge,Mao, Shengyi,Zhu, Xiaowei,&Wu, Nengyou.(2014).Molecular and stable carbon isotopic compositions of hopanoids in seep carbonates from the South China Sea continental slope.journal of asian earth sciences,92,254-261.
MLA	Guan, Hongxiang,et al."Molecular and stable carbon isotopic compositions of hopanoids in seep carbonates from the South China Sea continental slope".journal of asian earth sciences 92(2014):254-261.