| Morphology, seismic characterization and sediment dynamics of the Baiyun Slide Complex on the northern South China Sea margin | |
Li, Wei1,2; Wu, Shiguo1; Voelker, David2; Zhao, Fang1 ; Mi, Lijun3; Kopf, Achim2; Zhao, F (reprint author), Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China.
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| 2014-11-01 | |
| 发表期刊 | JOURNAL OF THE GEOLOGICAL SOCIETY
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| 卷号 | 171期号:6页码:865-877 |
| 文章类型 | Article |
| 摘要 | A large submarine slope failure, the Baiyun Slide Complex, has been discovered in the northern South China Sea. We describe the slide complex morphology, the seismic character of its structural elements and the slide evolution based on high-quality seismic reflection and multi-beam bathymetry data. The Baiyun Slide Complex has three major slide scars that show differences in headwall and sidewall geometry, the nature of the basal shear surfaces and the internal architecture of the deposits. From these observations, we propose a four-phase emplacement model. An extrapolation of the post-slide drape thickness (60 m) gives a rough age estimate for the mass transport events of 0.3 Ma. Pore pressure models for the unfailed continental slope in the vicinity of the Baiyun Slide are based on porosity measurements at nearby Ocean Drilling Program Site 1146. They show that excess pore pressure in slope sediments is anomalously high at a depth around 93 m, most probably as a consequence of a dramatic increase in sedimentation rates over the past 1.8 Ma. This excess pore pressure is proposed to be the major preconditioning factor for the slide initiation, possibly aided by volcano-tectonic activity and gas hydrate dissociation. The unfailed slope is stable under static conditions. However, a near-field earthquake of Mw 5 would suffice to induce a slope instability at c. 93 m depth. |
| 学科领域 | Geology |
| DOI | 10.1144/jgs2014-034 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000345012800010 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/23829 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Zhao, F (reprint author), Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China. |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Univ Bremen, Ctr Marine Environm Sci, MARUM, D-28359 Bremen, Germany 3.CNOOC, Dept Explorat, Beijing 100010, Peoples R China |
| 第一作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 GB/T 7714 | Li, Wei,Wu, Shiguo,Voelker, David,et al. Morphology, seismic characterization and sediment dynamics of the Baiyun Slide Complex on the northern South China Sea margin[J]. JOURNAL OF THE GEOLOGICAL SOCIETY,2014,171(6):865-877. |
| APA | Li, Wei.,Wu, Shiguo.,Voelker, David.,Zhao, Fang.,Mi, Lijun.,...&Zhao, F .(2014).Morphology, seismic characterization and sediment dynamics of the Baiyun Slide Complex on the northern South China Sea margin.JOURNAL OF THE GEOLOGICAL SOCIETY,171(6),865-877. |
| MLA | Li, Wei,et al."Morphology, seismic characterization and sediment dynamics of the Baiyun Slide Complex on the northern South China Sea margin".JOURNAL OF THE GEOLOGICAL SOCIETY 171.6(2014):865-877. |
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| Morphology, seismic （8721KB） | 限制开放 | ODC PDDL | 浏览 | |||
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