| Natural Structural Transition of Gas Hydrates From sI to sII in the Deep Seafloor | |
Ma, Liang1,2,3,4 ; Luan, Zhendong1,2,3,4; Du, Zengfeng1,2; Wang, Minxiao1,2; Li, Lianfu4; Xi, Shichuan4; Zhang, Yitong1,2,3; Zhang, Xiong1,2,3; Zhang, Xin1,2,3,4
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| 2024-06-28 | |
| 发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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| ISSN | 0094-8276 |
| 卷号 | 51期号:12页码:10 |
| 通讯作者 | Zhang, Xin(xzhang@qdio.ac.cn) |
| 摘要 | The evolution of gas hydrates influenced by the seawater environment is unknown. We present a model of structural transformation from sI hydrate to sII hydrate due to the influence of seawater environment and vent fluid in nature through in situ experiments of gas hydrate formation in the Haima cold seep area. The in situ experimental results indicate that gas hydrates preferentially form as sI hydrates even in cold seep environments where C2+ hydrocarbons are present. During subsequent evolution, the sI hydrates could restructured at the effect of seawater environment and vent fluid, causing transformation to sII hydrates under the influence of hydrate stability. The supply of gas and direct contact with seawater environment are critical factors for structural transformation. Such structural transformation is the result of gas hydrates seeking thermodynamic stability and may be common in active cold seep areas. Plain Language Summary At high pressures and low temperatures, methane molecules are able to be captured by water in a solid hydrate state, known as natural gas hydrate. The significance of the abundant reserves of natural gas hydrates in the oceans, both in terms of global climate issues and energy resources, has been widely recognised. Since most natural gas reservoirs are dominated by methane (>90%), it is generally accepted that gas hydrates in the oceans tend to be structure I. However, through a field experiment in an active cold seep area, we found that newly generated gas hydrates under the influence of the same cold seep area were of structure I, whereas naturally exposed gas hydrates that had existed for a long period of time on the seafloor were instead of structure II. Based on this, we propose a model of structural transformation (structure I to structure II) of gas hydrates under the influence of seawater environment and vent fluid. This structural transformation may be a natural phenomenon that is common in active cold seep areas. |
| 关键词 | gas hydrates in situ detection structural transition Raman spectroscopy |
| DOI | 10.1029/2023GL106839 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China ; Laoshan laboratory Science and Technology Innovation Project[LSKJ202203101] ; Strategic Priority Research Program, CAS[XDB42040305] ; Young Taishan Scholars Program[tsqn201909158] ; Key Project of Ocean Research Center, Chinese Academy of Sciences[COMS2020J03] ; Qingdao science and technology benefit the people demonstration project ; [42221005] ; [52001303] ; [42049582] |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| WOS记录号 | WOS:001247584000001 |
| 出版者 | AMER GEOPHYSICAL UNION |
| WOS关键词 | CLATHRATE HYDRATE ; RAMAN ; SLOPE ; DECOMPOSITION ; GEOCHEMISTRY |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/186564 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Zhang, Xin |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Ocean Observat & Forecasting, Key Lab Marine Geol & Environm, Qingdao, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Ctr Ocean Mega Sci, Qingdao, Peoples R China 3.LaoShan Lab, Qingdao, Peoples R China 4.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 第一作者单位 | 深海极端环境与生命过程研究中心 |
| 通讯作者单位 | 深海极端环境与生命过程研究中心 |
| 推荐引用方式 GB/T 7714 | Ma, Liang,Luan, Zhendong,Du, Zengfeng,et al. Natural Structural Transition of Gas Hydrates From sI to sII in the Deep Seafloor[J]. GEOPHYSICAL RESEARCH LETTERS,2024,51(12):10. |
| APA | Ma, Liang.,Luan, Zhendong.,Du, Zengfeng.,Wang, Minxiao.,Li, Lianfu.,...&Zhang, Xin.(2024).Natural Structural Transition of Gas Hydrates From sI to sII in the Deep Seafloor.GEOPHYSICAL RESEARCH LETTERS,51(12),10. |
| MLA | Ma, Liang,et al."Natural Structural Transition of Gas Hydrates From sI to sII in the Deep Seafloor".GEOPHYSICAL RESEARCH LETTERS 51.12(2024):10. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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