Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| Lipid Biomarkers and Their Stable Carbon Isotopes in Ancient Seep Carbonates from SW Taiwan, China | |
Guan Hongxiang1,2 ; Xu Lanfang1,3; Wang Qinxian4; Chen Duofu2,4; Wu Nengyou2; Mao Shengyi1
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| 2019-02-01 | |
| Source Publication | ACTA GEOLOGICA SINICA-ENGLISH EDITION
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| ISSN | 1000-9515 |
| Volume | 93Issue:1Pages:167-174 |
| Corresponding Author | Guan Hongxiang(guanhx@ms.giec.ac.cn) |
| Abstract | Four massive brecciated, chimney-like, and slender pipe network carbonate samples (JA-4, JA-5, JX-8 and BG-12) were collected from southwestern Taiwan, which were suggested to have formed as a result of anaerobic oxidization of methane (AOM). Considering that the environmental conditions of the carbonates precipitation and the sources of carbon and organic matter need to be further declared, molecular fossils and compound-specific carbon isotopic investigations of the carbonates were conducted in this study. According to lipid biomarkers of 2,6,10,15,19-pentamethyleicosane (PMI) and squalane diagnostic to methanotrophic archaea, as well as the extremely low C-13 values (as low as -113.4 parts per thousand) detected in samples JA-4, JA-5 and JX-8, these carbonates were revealed to be a result of AOM. Based on the varied C-13 values of characteristic archaea biomarkers in specific samples, biogenic methane was proposed to be responsible for the formation of samples JA-4 and JA-5, whereas a mixed carbon source of C-13-depleted methane and C-13-enriched residual CO2 from methanogenesis was suggested for the carbonate of JX-8 due to the co-occurrence of a highly positive C-13(carb) value (+8 parts per thousand) and a moderate C-13 depletion of PMI. The low content of AOM-related biomarkers and the absence of indicators for ANME-2 suggested that these carbonates were formed in weak seep settings. By comparison, no typical lipid biomarkers for methanotrophic archaea was detected in carbonate BG-12. The short-chain and long-chain n-alkanes accounted for 30% and 45% of all hydrocarbons, respectively, with a CPI value of 1.2, suggesting that the n-alkanes were derived from both marine organisms and terrestrial inputs. A low thermal maturity could be revealed by the incomplete equilibrium value of the C-31 22S/(22S+22R) ratio (0.5), and the carbonate BG-12 was probably deposited in a suboxic condition indicated by a value of Pr/Ph ratio (2.5). |
| Keyword | methane seeps lipid biomarkers anaerobic oxidation of methane weak seep settings |
| DOI | 10.1111/1755-6724.13772 |
| WOS Keyword | ANAEROBIC METHANE OXIDATION ; COLD SEEPS ; AUTHIGENIC CARBONATES ; BLACK-SEA ; REARRANGED HOPANES ; WESTERN FOOTHILLS ; CONVERGENT MARGIN ; HYDROCARBON-SEEP ; MARINE ; SEDIMENTS |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Qingdao National Laboratory for Marine Science and Technology[QNLM2016ORP0210] ; NSF of China[41473080] ; NSF of China[41673029] |
| WOS Research Area | Geology |
| Funding Organization | Qingdao National Laboratory for Marine Science and Technology ; NSF of China |
| WOS Subject | Geosciences, Multidisciplinary |
| WOS ID | WOS:000461610000011 |
| Publisher | WILEY |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/24747 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Guan Hongxiang |
| 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, Shandong, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Shanghai Ocean Univ, Coll Marine Sci, Shanghai Engn Res Ctr Hadal Sci & Technol, Shanghai 201306, Peoples R China |
| First Author Affilication | GuangZhou Institute of Energy Conversion,Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Guan Hongxiang,Xu Lanfang,Wang Qinxian,et al. Lipid Biomarkers and Their Stable Carbon Isotopes in Ancient Seep Carbonates from SW Taiwan, China[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2019,93(1):167-174. |
| APA | Guan Hongxiang,Xu Lanfang,Wang Qinxian,Chen Duofu,Wu Nengyou,&Mao Shengyi.(2019).Lipid Biomarkers and Their Stable Carbon Isotopes in Ancient Seep Carbonates from SW Taiwan, China.ACTA GEOLOGICA SINICA-ENGLISH EDITION,93(1),167-174. |
| MLA | Guan Hongxiang,et al."Lipid Biomarkers and Their Stable Carbon Isotopes in Ancient Seep Carbonates from SW Taiwan, China".ACTA GEOLOGICA SINICA-ENGLISH EDITION 93.1(2019):167-174. |
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