| Seismic characteristics and triggering mechanism analysis of mass transport deposits in the northern continental slope of the South China Sea | |
| Wu Shi-Guo1; Qin Zhi-Liang1,2; Wang Da-Wei1; Peng Xue-Chao3; Wang Zhi-Jun4; Yao Gen-Shun5; Wu, SG (reprint author), Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China | |
| 2011-12-01 | |
| 发表期刊 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| ISSN | 0001-5733 |
| 卷号 | 54期号:12页码:3184-3195 |
| 文章类型 | Article |
| 摘要 | Mass transport deposits (MTDs) are one kind of deepwater sedimentary system driven by the gravity flow action, and play an important role in the deep-water sedimentation in the global continental margins. MTDs are not only one of the most serious deep-water geo-hazards, but also have close relationships with the formation and accumulation of marine gas hydrates and deepwater hydrocarbon. Based on the topographic and high resolution seismic data in the hydrocarbon exploration region, we reveal the discerned characteristics and distribution of the MTDs in the northern slope of the South China Sea. The MTDs are characterized by apparent geomorphology and sedimentary structures. The head of MTDs has well developed extensional fault; the middle of MTDs has slide and turnover block; in the toe region of MTDs occurred compressive structures and thrust faults. Several mechanisms can induce the development of MTDs. However, Baiyun MTDs were inferred to be dominated by the dissociation of gas hydrate after we have analyzed the model of gas hydrate reservoirs and numerical modeling by using elastic-plastic finite element method for the MTDs in the Baiyun sag. We calculated 6 sets of safety factors with 6 different dissociation levels of gas hydrate, and found that with the increasing dissociation of gas hydrate, the stability of submarine slope decreases.; Mass transport deposits (MTDs) are one kind of deepwater sedimentary system driven by the gravity flow action, and play an important role in the deep-water sedimentation in the global continental margins. MTDs are not only one of the most serious deep-water geo-hazards, but also have close relationships with the formation and accumulation of marine gas hydrates and deepwater hydrocarbon. Based on the topographic and high resolution seismic data in the hydrocarbon exploration region, we reveal the discerned characteristics and distribution of the MTDs in the northern slope of the South China Sea. The MTDs are characterized by apparent geomorphology and sedimentary structures. The head of MTDs has well developed extensional fault; the middle of MTDs has slide and turnover block; in the toe region of MTDs occurred compressive structures and thrust faults. Several mechanisms can induce the development of MTDs. However, Baiyun MTDs were inferred to be dominated by the dissociation of gas hydrate after we have analyzed the model of gas hydrate reservoirs and numerical modeling by using elastic-plastic finite element method for the MTDs in the Baiyun sag. We calculated 6 sets of safety factors with 6 different dissociation levels of gas hydrate, and found that with the increasing dissociation of gas hydrate, the stability of submarine slope decreases. |
| 关键词 | Mass Transport Deposits Gravity Flow Seafloor Instability Gas Hydrate Submarine Landslide South China Sea |
| 学科领域 | Geochemistry & Geophysics |
| DOI | 10.3969/j.issn.0001-5733.2011.12.018 |
| URL | 查看原文 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000298906400018 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/11535 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Wu, SG (reprint author), Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Guangzhou Marine Geol Survey, Inst Geol Survey, Guangzhou 510706, Guangdong, Peoples R China 4.CNOOC Gen Res Inst, Beijing 100027, Peoples R China 5.Hangzhou Inst Geol, Hangzhou 310023, Zhejiang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu Shi-Guo,Qin Zhi-Liang,Wang Da-Wei,et al. Seismic characteristics and triggering mechanism analysis of mass transport deposits in the northern continental slope of the South China Sea[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2011,54(12):3184-3195. |
| APA | Wu Shi-Guo.,Qin Zhi-Liang.,Wang Da-Wei.,Peng Xue-Chao.,Wang Zhi-Jun.,...&Wu, SG .(2011).Seismic characteristics and triggering mechanism analysis of mass transport deposits in the northern continental slope of the South China Sea.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,54(12),3184-3195. |
| MLA | Wu Shi-Guo,et al."Seismic characteristics and triggering mechanism analysis of mass transport deposits in the northern continental slope of the South China Sea".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 54.12(2011):3184-3195. |
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