Fatty-acids and their C-13 signatures in seep carbonates from hydrocarbon seeps on the upper (GC 185) and lower (AC 645) continental slope of the Gulf of Mexico

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	Fatty-acids and their C-13 signatures in seep carbonates from hydrocarbon seeps on the upper (GC 185) and lower (AC 645) continental slope of the Gulf of Mexico
	Guan, H. X.1,2,3; Feng, D.2; Wu, N. Y.1; Chen, D. F.2
刊名	geochimica et cosmochimica acta
	2009-06-01
卷号	73 期号:13 页码:a473-a473
关键词	fatty acids carbon isotope of individual lipid sulfate reducing bacteria anaerobic oxidation of methane seep carbonate Gulf of Mexico 脂肪酸单体化合物稳定碳同位素硫酸盐还原菌甲烷厌氧氧化冷泉碳酸盐岩墨西哥湾
ISSN号	0016-7037
其他题名	墨西哥湾北陆坡区冷泉碳酸盐岩脂肪酸及碳同位素特征
通讯作者	cdf@gig.ac.cn
中文摘要	here we reported the fatty-acids and their δ 13c values in seep carbonates collected from green canyon lease block 185 (gc 185; sample gc-f) at upper continental slope (water depth: ∼540 m), and alaminos canyon lease block 645 (gc 645; sample ac-e) at lower continental slope (water depth: ∼2200 m) of the gulf of mexico. more than thirty kinds of fatty acids were detected in both samples. these fatty acids are maximized at c16. there is a clear even-over-odd carbon number predominance in carbon number range. the fatty acids are mainly composed of n-fatty acids, iso-/anteiso-fatty acids and terminally branched odd-numbered fatty acids (iso/anteiso). the low δ 13c values (−39.99‰ to.32.36‰) of n-c12:0, n-c13:0, i-c14:0and n-c14:0 suggest that they may relate to the chemosynthetic communities at seep sites. the unsaturated fatty acids n-c18:2 and c18:1δ9 have the same δ 13c values, they may originate from thebeggiatoa/thioploca. unlike other fatty acids, the terminally branched fatty acids (iso/anteiso) show lowerδ 13c values (as low as −63.95‰) suggesting a possible relationship to sulfate reducing bacteria, which is common during anaerobic oxidation of methane at seep sites.
WOS标题词	science & technology ; physical sciences
类目[WOS]	geochemistry & geophysics
研究领域[WOS]	geochemistry & geophysics
收录类别	SCI ; ISTP
资助信息	国家重点基础研究发展计划(编号: 2009cb219506);国家杰出青年科学基金(批准号: 40725011);nsfc-广东联合基金(批准号: u0733003);中国科学院可再生能源与天然气水合物重点实验室基金(编号: o807j1);中国科学院知识创新工程重要方向性项目(编号: kgcx2-yw-805)
原文出处	http://www.springerlink.com/content/1001-6538/
语种	英语
WOS记录号	WOS:000267229901177
公开日期	2010-09-16
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/3312]
专题	中国科学院广州能源研究所
作者单位	1.CAS, Guangzhou Ctr Gas Hydrate Res, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 2.CAS, Guangzhou Inst Geochem, Key Lab Marginal Sea Geol, Guangzhou 510640, Guangdong, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Guan, H. X.,Feng, D.,Wu, N. Y.,et al. Fatty-acids and their C-13 signatures in seep carbonates from hydrocarbon seeps on the upper (GC 185) and lower (AC 645) continental slope of the Gulf of Mexico[J]. geochimica et cosmochimica acta,2009,73(13):a473-a473.
APA	Guan, H. X.,Feng, D.,Wu, N. Y.,&Chen, D. F..(2009).Fatty-acids and their C-13 signatures in seep carbonates from hydrocarbon seeps on the upper (GC 185) and lower (AC 645) continental slope of the Gulf of Mexico.geochimica et cosmochimica acta,73(13),a473-a473.
MLA	Guan, H. X.,et al."Fatty-acids and their C-13 signatures in seep carbonates from hydrocarbon seeps on the upper (GC 185) and lower (AC 645) continental slope of the Gulf of Mexico".geochimica et cosmochimica acta 73.13(2009):a473-a473.