Geophysical signatures associated with fluid flow and gas hydrate occurrence in a tectonically quiescent sequence, Qiongdongnan Basin, South China Sea
文献类型：期刊论文
| 作者 | Wang, X.1,2 ; Wu, S.1,2; Yuan, S.1,2,5; Wang, D.1,2; Ma, Y.1,2; Yao, G.3; Gong, Y.4; Zhang, G.4; Wang, X, Chinese Acad Sci, Key Lab Marine Geol & Environm, Qingdao, Peoples R China
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| 刊名 | GEOFLUIDS
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| 出版日期 | 2010-08-01 |
| 卷号 | 10期号:3页码:351-368 |
| 关键词 | Chimney Gas Hydrate Pockmark Polygonal Fault Qiongdongnan Basin |
| ISSN号 | 1468-8115 |
| DOI | 10.1111/j.1468-8123.2010.00292.x |
| 文献子类 | Article |
| 英文摘要 | Interpretation of high-resolution two-dimensional (2D) and three-dimensional (3D) seismic data collected in the Qiongdongnan Basin, South China Sea reveals the presence of polygonal faults, pockmarks, gas chimneys and slope failure in strata of Pliocene and younger age. The gas chimneys are characterized by low-amplitude reflections, acoustic turbidity and low P-wave velocity indicating fluid expulsion pathways. Coherence time slices show that the polygonal faults are restricted to sediments with moderate-amplitude, continuous reflections. Gas hydrates are identified in seismic data by the presence of bottom simulating reflectors (BSRs), which have high amplitude, reverse polarity and are subparallel to seafloor. Mud diapirism and mounded structures have variable geometry and a great diversity regarding the origin of the fluid and the parent beds. The gas chimneys, mud diapirism, polygonal faults and a seismic facies-change facilitate the upward migration of thermogenic fluids from underlying sediments. Fluids can be temporarily trapped below the gas hydrate stability zone, but fluid advection may cause gas hydrate dissociation and affect the thickness of gas hydrate zone. The fluid accumulation leads to the generation of excess pore fluids that release along faults, forming pockmarks and mud volcanoes on the seafloor. These features are indicators of fluid flow in a tectonically-quiescent sequence, Qiongdongnan Basin.; Interpretation of high-resolution two-dimensional (2D) and three-dimensional (3D) seismic data collected in the Qiongdongnan Basin, South China Sea reveals the presence of polygonal faults, pockmarks, gas chimneys and slope failure in strata of Pliocene and younger age. The gas chimneys are characterized by low-amplitude reflections, acoustic turbidity and low P-wave velocity indicating fluid expulsion pathways. Coherence time slices show that the polygonal faults are restricted to sediments with moderate-amplitude, continuous reflections. Gas hydrates are identified in seismic data by the presence of bottom simulating reflectors (BSRs), which have high amplitude, reverse polarity and are subparallel to seafloor. Mud diapirism and mounded structures have variable geometry and a great diversity regarding the origin of the fluid and the parent beds. The gas chimneys, mud diapirism, polygonal faults and a seismic facies-change facilitate the upward migration of thermogenic fluids from underlying sediments. Fluids can be temporarily trapped below the gas hydrate stability zone, but fluid advection may cause gas hydrate dissociation and affect the thickness of gas hydrate zone. The fluid accumulation leads to the generation of excess pore fluids that release along faults, forming pockmarks and mud volcanoes on the seafloor. These features are indicators of fluid flow in a tectonically-quiescent sequence, Qiongdongnan Basin. Geofluids (2010) 10, 351-368. |
| 学科主题 | Geochemistry & Geophysics ; Geology |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000280973700003 |
| 公开日期 | 2010-11-18 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/1837]  |
| 专题 | 研究生部 海洋研究所_海洋地质与环境重点实验室 |
| 通讯作者 | Wang, X, Chinese Acad Sci, Key Lab Marine Geol & Environm, Qingdao, Peoples R China |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Marine Geol & Environm, Qingdao, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China 3.PetroChina Hangzhou Inst Geol, Hangzhou, Zhejiang, Peoples R China 4.MLR, Guangzhou Marine Geol Survey, Guangzhou, Guangdong, Peoples R China 5.Res Inst Petr Explorat & Dev, State Key Lab Enhanced Oil Recovery, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, X.,Wu, S.,Yuan, S.,et al. Geophysical signatures associated with fluid flow and gas hydrate occurrence in a tectonically quiescent sequence, Qiongdongnan Basin, South China Sea[J]. GEOFLUIDS,2010,10(3):351-368. |
| APA | Wang, X..,Wu, S..,Yuan, S..,Wang, D..,Ma, Y..,...&Wang, X, Chinese Acad Sci, Key Lab Marine Geol & Environm, Qingdao, Peoples R China.(2010).Geophysical signatures associated with fluid flow and gas hydrate occurrence in a tectonically quiescent sequence, Qiongdongnan Basin, South China Sea.GEOFLUIDS,10(3),351-368. |
| MLA | Wang, X.,et al."Geophysical signatures associated with fluid flow and gas hydrate occurrence in a tectonically quiescent sequence, Qiongdongnan Basin, South China Sea".GEOFLUIDS 10.3(2010):351-368. |
入库方式： OAI收割
来源：海洋研究所
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