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Molecular and stable carbon isotopic compositions of hopanoids in seep carbonates from the South China Sea continental slope
Guan, Hongxiang1; Sun, Yongge2; Mao, Shengyi1,3; Zhu, Xiaowei1,3; Wu, Nengyou1,3
2014-10-01
发表期刊JOURNAL OF ASIAN EARTH SCIENCES
卷号92页码:254-261
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.
文章类型Article
关键词Hopanoids Methanotrophy Seep Carbonates South China Sea
WOS标题词Science & Technology ; Physical Sciences
DOI10.1016/j.jseaes.2013.10.026
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类目Geosciences, Multidisciplinary
WOS记录号WOS:000341554100018
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文献类型期刊论文
条目标识符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
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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.
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