Cold-Water Corals in Gas Hydrate Drilling Cores from the South China Sea: Occurrences, Geochemical Characteristics and Their Relationship to Methane Seepages
文献类型：期刊论文
| 作者 | Deng, Yinan; Chen, Fang; Li, Niu; Jin, Meng; Cao, Jun; Chen, Hong; Zhou, Yang; Wu, Cong; Zhuang, Chang; Zhao, Yi |
| 刊名 | MINERALS
 |
| 出版日期 | 2019 |
| 卷号 | 9期号:12页码:742 |
| 关键词 | cold water corals methane seeps carbon and oxygen isotope authigenic carbonate South China Sea |
| DOI | 10.3390/min9120742 |
| 英文摘要 | Cold-water corals (CWCs) are frequently found at cold seep areas. However, the relationship between fluid seepage and CWC development is not clear. Here, for the first time, we report the occurrences, species identification, mineralogy, carbon and oxygen isotopes, as well as elemental compositions of fossil CWC skeletons from gas-hydrate-bearing sediment in drilling cores from the South China Sea (SCS). Three sites (GMGS-08, GMGS-09B, and GMGS-16) were investigated but CWCs were only found at one site (GMGS-09B). Interestingly, the CWCs were found in three horizons and they were all embedded with authigenic carbonates. Three genera of fossil CWCs (Crispatotrochus sp., Solenosmilia sp. and Enallopsammia sp.) were identified. The CWC fragments are predominantly aragonite. The CWCs exhibit delta C-13 values between -8.4 parts per thousand and -0.6 parts per thousand that are significantly higher than delta C-13 values of the associated seep carbonates (delta C-13 values with an average of -55.6 parts per thousand, n = 19), which indicates a carbon source other than methane for the CWCs. It appears that authigenic carbonates provide a substratum for coral colonization. Bathymetric high points, appropriate water temperature and stronger bottom-water currents at site GMGS-09B might be crucial to keep conditions favorable for the growth of CWCs in the studied area. In addition, high trace-element concentrations of Cr, Ni, Pb, U, Ba, Th, and Sr suggest that the CWCs are influenced by strong fluid seepage that can reach the water-sediment interface, and associated microbial activity. Hence, it also becomes evident that CWCs in hydrocarbon-rich seepage areas not only provide a critical constraint on the impact of fluid emission on the bottom water chemistry, but also are likely to be very precise recorders of the end time of cold seep activity. |
| 资助机构 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41776066, 41706053, 41803026, 41976061]; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) [GML2019ZD0506]; Yunnan University's Research Innovation Fund for Graduate Students [2019z046]; China Ocean Mineral Resources RD Association [DY135-C1-1-04]; Key Laboratory of Marine Mineral Resources, Ministry of Natural Resources [KLMMR-2015-A-03] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41776066, 41706053, 41803026, 41976061]; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) [GML2019ZD0506]; Yunnan University's Research Innovation Fund for Graduate Students [2019z046]; China Ocean Mineral Resources RD Association [DY135-C1-1-04]; Key Laboratory of Marine Mineral Resources, Ministry of Natural Resources [KLMMR-2015-A-03] |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/18242]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 推荐引用方式 GB/T 7714 | Deng, Yinan,Chen, Fang,Li, Niu,et al. Cold-Water Corals in Gas Hydrate Drilling Cores from the South China Sea: Occurrences, Geochemical Characteristics and Their Relationship to Methane Seepages[J]. MINERALS,2019,9(12):742. |
| APA | Deng, Yinan.,Chen, Fang.,Li, Niu.,Jin, Meng.,Cao, Jun.,...&Cheng, Sihai.(2019).Cold-Water Corals in Gas Hydrate Drilling Cores from the South China Sea: Occurrences, Geochemical Characteristics and Their Relationship to Methane Seepages.MINERALS,9(12),742. |
| MLA | Deng, Yinan,et al."Cold-Water Corals in Gas Hydrate Drilling Cores from the South China Sea: Occurrences, Geochemical Characteristics and Their Relationship to Methane Seepages".MINERALS 9.12(2019):742. |
入库方式： OAI收割
来源：南海海洋研究所
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