Authigenic carbonate formation revealed by lipid biomarker inventory at hydrocarbon seeps: A case study from the Okinawa Trough

doi:10.1016/j.marpetgeo.2018.12.028

GIEC OpenIR

	Authigenic carbonate formation revealed by lipid biomarker inventory at hydrocarbon seeps: A case study from the Okinawa Trough
	Guan, Hongxiang1,2 ; Sun, Zhilei 2,3; Mao, Shengyi 1; Xu, Lanfang 1; Cao, Hong 2,3; Geng, Wei 2,3; Xu, Cuiling 2,3; Zhang, Xianrong 2,3; Wu, Nengyou2,3
	2019-03-01
发表期刊	MARINE AND PETROLEUM GEOLOGY
ISSN	0264-8172
卷号	101 页码:502-511
通讯作者	Guan, Hongxiang(guanhx@ms.giec.ac.cn) ; Sun, Zhilei(zhileisun@yeah.net)
摘要	Authigenic carbonates were recovered from the northern Okinawa Trough at 540-700 m water depth. Development of microbial communities and seepage dynamics driving the precipitation of authigenic carbonates remains poorly constrained, even though the source of methane-rich fluids, formation of Fe-rich carbonates, and the potential driving forces were previously reported. Here, petrologic observations, stable carbon and oxygen isotopic compositions, mineralogy, and lipid inventories of authigenic carbonates from the northern Okinawa Trough were analyzed. The carbonate minerals were comprised predominantly of aragonite, high-magnesium calcite, and siderite. The presence of molecular fossils diagnostic for anaerobic methane oxidizing archaea (ANME) and sulfate-reducing bacteria (SRB) with pronounced C-13 depletions (as low as - 134 parts per thousand), together with highly negative delta C-13(carb) values (as low as - 55.8 parts per thousand), suggest that the carbonates precipitated from anaerobic oxidation of methane (AOM) with microbial methane as the predominant carbon source. The difference between measured and calculated delta O-18(carb) values (based on 0 parts per thousand of sea water delta O-18 vs V-SMOW) was higher than +3 parts per thousand in one of the carbonates (GGD16), reflecting an origin from gas hydrate dissociation. Most of the carbonates revealed delta O-18 offsets between measured and calculated values within + 3 parts per thousand, or a lower measured delta O-18 than calculated value, suggesting a mixture of methane-derived carbonates (low delta C-13 /high delta O-18) and detrital origin carbonates (high delta C-13/low delta O-18). Biomarker patterns varied significantly among samples. A suite of C-13-depleted biomarkers indicated the predominance of an ANME-1 assemblage for all samples, suggesting carbonates formed at low to medium methane flux. The predominance of ANME-1, abundant detrital minerals, and allochthonous biomarkers, as well as low carbonate contents indicate that most samples formed at greater depth within the sediment column. Only one carbonate sample in this study is interpreted to have precipitated at relatively shallower depth, as indicated by the occurrence of crocetane, dominance of aragonite, and higher overall carbonate content.
关键词	Cold seeps Authigenic carbonates Lipid biomarkers Methane seepage intensities The Okinawa trough
DOI	10.1016/j.marpetgeo.2018.12.028
关键词[WOS]	ANAEROBIC METHANE OXIDATION ; SULFATE-REDUCING BACTERIA ; PORE-WATER GEOCHEMISTRY ; COLD SEEPS ; BLACK-SEA ; MICROBIAL COMMUNITIES ; METHANOTROPHIC ARCHAEA ; FLUID COMPOSITION ; STABLE-ISOTOPES ; SEDIMENTS
收录类别	SCI
语种	英语
资助项目	Qingdao National Laboratory for Marine Science and Technology[QNLM2016ORP0210] ; NSF of China[41473080] ; National Key Research and Development Program[2017YFC0307704] ; Marine Geological Survey project of the China Geological Survey[DD20160218]
WOS研究方向	Geology
项目资助者	Qingdao National Laboratory for Marine Science and Technology ; NSF of China ; National Key Research and Development Program ; Marine Geological Survey project of the China Geological Survey
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000459525300034
出版者	ELSEVIER SCI LTD
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/24537
专题	中国科学院广州能源研究所
通讯作者	Guan, Hongxiang; Sun, Zhilei
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266061, Peoples R China 3.Qingdao Inst Marine Geol, Minist Nat Resources, Key Lab Gas Hydrate, Qingdao 266071, Peoples R China
第一作者单位	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	Guan, Hongxiang,Sun, Zhilei,Mao, Shengyi,et al. Authigenic carbonate formation revealed by lipid biomarker inventory at hydrocarbon seeps: A case study from the Okinawa Trough[J]. MARINE AND PETROLEUM GEOLOGY,2019,101:502-511.
APA	Guan, Hongxiang.,Sun, Zhilei.,Mao, Shengyi.,Xu, Lanfang.,Cao, Hong.,...&Wu, Nengyou.(2019).Authigenic carbonate formation revealed by lipid biomarker inventory at hydrocarbon seeps: A case study from the Okinawa Trough.MARINE AND PETROLEUM GEOLOGY,101,502-511.
MLA	Guan, Hongxiang,et al."Authigenic carbonate formation revealed by lipid biomarker inventory at hydrocarbon seeps: A case study from the Okinawa Trough".MARINE AND PETROLEUM GEOLOGY 101(2019):502-511.