| Geophysical evidence for cyclic sediment deposition on the southern slope of Qiongdongnan Basin, South China Sea | |
Sun, Qi-Liang1,2; Wu, Shi-Guo1; Luedmann, Thomas3; Wang, Bin4 ; Yang, Tao-Tao4; Sun, QL (reprint author), Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China
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| 2011-09-01 | |
| 发表期刊 | MARINE GEOPHYSICAL RESEARCH
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| ISSN | 0025-3235 |
| 卷号 | 32期号:3页码:415-428 |
| 文章类型 | Article |
| 摘要 | Gravity flow deposits form a significant component of the stratigraphic record in ancient and modern deep-water basins worldwide. Analyses of high-resolution 3D seismic reflection data in a predominantly slope setting, the southern slope of Qiongdongnan Basin, South China Sea, reveal the extensive presence of gravity flow depositional elements in the Late Pliocene-Quaternary strata. Three key elements were observed: (1) mass transport deposits (MTDs) including slumps and debris flows, (2) turbidity current deposits including distributary channel complexes, leveed channel complexes and avulsion channel complexes, and (3) deep-water drapes (highstand condensed sections). Each depositional element displays a unique seismic expression and internal structures in seismic profiles and attribute maps. Based on seismic characteristics, the studied succession is subdivided into six units in which three depositional cycles are identified. Each cycle exhibits MTDs (slump or debris) at the base, overlain by turbidities or a deep-water drape. The genesis of these cycles is mainly controlled by frequent sea-level fluctuations and high sedimentation rates in the Late Pliocene-Quaternary. Moreover, tectonics, differential subsidence, and paleo-seafloor morphology may have also contributed to their formation processes. The present study is aimed to a better understanding of deep-water depositional systems, and to a successful hydrocarbon exploration and engineering-risk assessment.; Gravity flow deposits form a significant component of the stratigraphic record in ancient and modern deep-water basins worldwide. Analyses of high-resolution 3D seismic reflection data in a predominantly slope setting, the southern slope of Qiongdongnan Basin, South China Sea, reveal the extensive presence of gravity flow depositional elements in the Late Pliocene-Quaternary strata. Three key elements were observed: (1) mass transport deposits (MTDs) including slumps and debris flows, (2) turbidity current deposits including distributary channel complexes, leveed channel complexes and avulsion channel complexes, and (3) deep-water drapes (highstand condensed sections). Each depositional element displays a unique seismic expression and internal structures in seismic profiles and attribute maps. Based on seismic characteristics, the studied succession is subdivided into six units in which three depositional cycles are identified. Each cycle exhibits MTDs (slump or debris) at the base, overlain by turbidities or a deep-water drape. The genesis of these cycles is mainly controlled by frequent sea-level fluctuations and high sedimentation rates in the Late Pliocene-Quaternary. Moreover, tectonics, differential subsidence, and paleo-seafloor morphology may have also contributed to their formation processes. The present study is aimed to a better understanding of deep-water depositional systems, and to a successful hydrocarbon exploration and engineering-risk assessment. |
| 关键词 | Deep-water Sedimentation Cyclic Deposition Mass Transport Deposits Turbidite Sea Level Change Qiongdongnan Basin |
| 学科领域 | Geochemistry & Geophysics ; Oceanography |
| DOI | 10.1007/s11001-011-9121-5 |
| URL | 查看原文 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000294015000005 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/11501 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Sun, QL (reprint author), Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Univ Hamburg, Ctr Marine & Atmospher Sci, Hamburg, Germany 4.PetroChina Hangzhou Inst Geol, Hangzhou 310023, Zhejiang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Qi-Liang,Wu, Shi-Guo,Luedmann, Thomas,et al. Geophysical evidence for cyclic sediment deposition on the southern slope of Qiongdongnan Basin, South China Sea[J]. MARINE GEOPHYSICAL RESEARCH,2011,32(3):415-428. |
| APA | Sun, Qi-Liang,Wu, Shi-Guo,Luedmann, Thomas,Wang, Bin,Yang, Tao-Tao,&Sun, QL .(2011).Geophysical evidence for cyclic sediment deposition on the southern slope of Qiongdongnan Basin, South China Sea.MARINE GEOPHYSICAL RESEARCH,32(3),415-428. |
| MLA | Sun, Qi-Liang,et al."Geophysical evidence for cyclic sediment deposition on the southern slope of Qiongdongnan Basin, South China Sea".MARINE GEOPHYSICAL RESEARCH 32.3(2011):415-428. |
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