Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| Authigenic carbonate formation revealed by lipid biomarker inventory at hydrocarbon seeps: A case study from the Okinawa Trough | |
Guan, Hongxiang1,2 ; Sun, Zhilei2,3; Mao, Shengyi1; Xu, Lanfang1; Cao, Hong2,3; Geng, Wei2,3; Xu, Cuiling2,3; Zhang, Xianrong2,3; Wu, Nengyou2,3
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| 2019-03-01 | |
| Source Publication | MARINE AND PETROLEUM GEOLOGY
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| ISSN | 0264-8172 |
| Volume | 101Pages:502-511 |
| Corresponding Author | Guan, Hongxiang(guanhx@ms.giec.ac.cn) ; Sun, Zhilei(zhileisun@yeah.net) |
| Abstract | 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. |
| Keyword | Cold seeps Authigenic carbonates Lipid biomarkers Methane seepage intensities The Okinawa trough |
| DOI | 10.1016/j.marpetgeo.2018.12.028 |
| WOS Keyword | ANAEROBIC METHANE OXIDATION ; SULFATE-REDUCING BACTERIA ; PORE-WATER GEOCHEMISTRY ; COLD SEEPS ; BLACK-SEA ; MICROBIAL COMMUNITIES ; METHANOTROPHIC ARCHAEA ; FLUID COMPOSITION ; STABLE-ISOTOPES ; SEDIMENTS |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Geology |
| Funding Organization | 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 Subject | Geosciences, Multidisciplinary |
| WOS ID | WOS:000459525300034 |
| Publisher | ELSEVIER SCI LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/24537 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Guan, Hongxiang; Sun, Zhilei |
| Affiliation | 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 |
| First Author Affilication | GuangZhou Institute of Energy Conversion,Chinese Academy of Sciences |
| Recommended Citation 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. |
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