Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| Chemical and structural characteristics of gas hydrates from the Haima cold seeps in the Qiongdongnan Basin of the South China Sea | |
Fang, Yunxin1; Wei, Jiangong1; Lu, Hailong2,3; Liang, Jinqiang1; Lu, Jing'an1; Fu, Juan4 ; Cao, Ju1
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| 2019-09-15 | |
| Source Publication | JOURNAL OF ASIAN EARTH SCIENCES
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| ISSN | 1367-9120 |
| Volume | 182Pages:7 |
| Corresponding Author | Wei, Jiangong(weijiangong007@163.com) |
| Abstract | Crystalline structure, cage occupancy, and gas composition are important gas hydrate characteristics, which can be used to calculate the gas hydrate's stability and to estimate the energy potential. In May and October of 2015, a Guangzhou Marine Geological Survey team investigated two sites in the Haima cold seeps in the Qiongdongnan Basin, northern South China Sea. They recovered massive gas hydrate samples by conventional gravity coring. After the Shenhu Sea area and Dongsha Sea area, the Qiongdongnan Basin became a new area on the northern slope of the South China Sea where gas hydrates have been found. In order to reveal the structural and geochemical characteristics of the natural gas hydrates, samples were analyzed by micro-Raman spectroscopy and X-ray diffraction under ambient pressure and low-temperature conditions. The results indicate that the gas hydrate samples from the Haima cold seeps are typical structure I hydrates with a hydration number of 6.12-6.19. In addition, trace amounts of H2S trapped in the hydrate were identified based on its characteristic vibrational signature. The gas composition and delta C-13-CH4 of the hydrate-bound gas samples were analyzed for gas-source correlation. All of the gas samples are dominated by methane with small amounts of ethane and propane and had relatively light 8 delta C-13-CH4 indicating that all of the hydrate-bound gases are mixtures of biogenic and thermogenic gas. The thermogenic gas is inferred to be mainly derived from the coal layers of the Late Miocene-Pliocene Yacheng Formation in the northern Lingshui sag. |
| Keyword | Gas hydrates Cold seep Gas source Raman spectroscopy Qiongdongnan Basin |
| DOI | 10.1016/j.jseaes.2019.103924 |
| WOS Keyword | STRATIGRAPHIC TEST WELL ; PEARL RIVER MOUTH ; AUTHIGENIC CARBONATES ; ANAEROBIC OXIDATION ; METHANE HYDRATE ; NATURAL GASES ; AREA ; GEOCHEMISTRY ; CONSTRAINTS ; SEDIMENTS |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key Research and Development Plan of China[2016YFC0304905-03] ; National Natural Science Foundation of China[41602149] ; China Geological Survey Project[DD20189310] ; Guangdong Special Fund for Economic Development (Marine Economy)[GDME2018D001] ; Key Laboratory of Marine Mineral Resources, Ministry of Land Resources[KLMMR-2013-A-24] |
| WOS Research Area | Geology |
| Funding Organization | National Key Research and Development Plan of China ; National Natural Science Foundation of China ; China Geological Survey Project ; Guangdong Special Fund for Economic Development (Marine Economy) ; Key Laboratory of Marine Mineral Resources, Ministry of Land Resources |
| WOS Subject | Geosciences, Multidisciplinary |
| WOS ID | WOS:000486097300003 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/25668 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Wei, Jiangong |
| Affiliation | 1.Guangzhou Marine Geol Survey, Guangzhou 510075, Guangdong, Peoples R China 2.Peking Univ, Beijing Int Ctr Gas Hydrate, Beijing 100871, Peoples R China 3.Peking Univ, Coll Engn, Beijing 100871, Peoples R China 4.Chinese Acad Sci, GuangZhou Inst Energy Convers, Guangzhou 510650, Guangdong, Peoples R China |
| Recommended Citation GB/T 7714 | Fang, Yunxin,Wei, Jiangong,Lu, Hailong,et al. Chemical and structural characteristics of gas hydrates from the Haima cold seeps in the Qiongdongnan Basin of the South China Sea[J]. JOURNAL OF ASIAN EARTH SCIENCES,2019,182:7. |
| APA | Fang, Yunxin.,Wei, Jiangong.,Lu, Hailong.,Liang, Jinqiang.,Lu, Jing'an.,...&Cao, Ju.(2019).Chemical and structural characteristics of gas hydrates from the Haima cold seeps in the Qiongdongnan Basin of the South China Sea.JOURNAL OF ASIAN EARTH SCIENCES,182,7. |
| MLA | Fang, Yunxin,et al."Chemical and structural characteristics of gas hydrates from the Haima cold seeps in the Qiongdongnan Basin of the South China Sea".JOURNAL OF ASIAN EARTH SCIENCES 182(2019):7. |
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