| Recurrent slope failure and submarine channel incision as key factors controlling reservoir potential in the South China Sea (Qiongdongnan Basin, South Hainan Island) | |
Li, Wei1,3; Alves, Tiago M.2; Wu, Shiguo1,5; Voelker, David3; Zhao, Fang1 ; Mi, Lijun4; Kopf, Achim3
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| 2015-06-01 | |
| 发表期刊 | MARINE AND PETROLEUM GEOLOGY
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| 卷号 | 64页码:17-30 |
| 文章类型 | Article |
| 摘要 | High-resolution multi-beam bathymetry, 3D and 2D seismic reflection profiles from the South China Sea are used to investigate the morphology, characteriStics, origin and implications to petroleum systems of recurrent slope failure in the Qiongdongnan Basin, northern South China Sea. Seven Late Miocene-Holocene mass-transport deposits (MTDs) and numerous submarine canyons were identified on the continental slope and rise, providing new insights on the evolution of an enigmatic region of the South China Sea. This paper defends that the interpreted MTDs were triggered by a combination of high sedimentation rates and local tectonic uplift. By comparing the stratigraphy of the study area with local sea-level curves, we show that a significant portion of shelf-edge deposits effectively bypassed most of the continental slope during the Miocene-Quaternary to accumulate as large MTDs on its lower part (i.e. on the 'basin-floor'), independently of sea-level changes. Our work has implications to the current sequence stratigraphic models for continental margins, and sheds new light on the reservoir potential of Miocene units in the South China Sea. Hence, regions where base-of-slope fans are expected to occur are, in the study area, occupied by large-scale recurrent MTDs sourced from the shelf edge. Stratigraphically, recurrent slope instability resulted: a) in abrupt episodes of accommodation space creation on the shelfedge, b) on a moderate reduction in accommodation space at the base of the continental slope, and c) in a complete separation between shelf and distal slope depositional systems, with most stratigraphic markers on 3D seismic data being diachronous across the continental margin. As MTDs also comprise the bulk of channel-fill deposits in large submarine canyons, we propose that the reservoir potential of channel-fill deposits in the South China Sea is closely dependent on the nature of the sediment (i.e. net-to-gross ratio) eroded and transported by these same MTDs. (C) 2015 The Authors. Published by Elsevier Ltd. |
| 关键词 | Continental Slope Submarine Landslides Mass-transport Deposits South China Sea Sediment Bypass Petroleum Systems |
| DOI | 10.1016/j.marpetgeo.2015.02.043 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000354580300002 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/33020 |
| 专题 | 海洋地质与环境重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Cardiff Univ, Seism Lab Sch Earth & Ocean Sci 3D, Cardiff CF10 3AT, S Glam, Wales 3.Univ Bremen, MARUM, Ctr Marine Environm Sci, D-28359 Bremen, Germany 4.CNOOC, Dept Explorat, Beijing 100010, Peoples R China 5.Chinese Acad Sci, Sanya Inst Deep Sea Sci & Engn, Sanya 572000, 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,Alves, Tiago M.,Wu, Shiguo,et al. Recurrent slope failure and submarine channel incision as key factors controlling reservoir potential in the South China Sea (Qiongdongnan Basin, South Hainan Island)[J]. MARINE AND PETROLEUM GEOLOGY,2015,64:17-30. |
| APA | Li, Wei.,Alves, Tiago M..,Wu, Shiguo.,Voelker, David.,Zhao, Fang.,...&Kopf, Achim.(2015).Recurrent slope failure and submarine channel incision as key factors controlling reservoir potential in the South China Sea (Qiongdongnan Basin, South Hainan Island).MARINE AND PETROLEUM GEOLOGY,64,17-30. |
| MLA | Li, Wei,et al."Recurrent slope failure and submarine channel incision as key factors controlling reservoir potential in the South China Sea (Qiongdongnan Basin, South Hainan Island)".MARINE AND PETROLEUM GEOLOGY 64(2015):17-30. |
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| Recurrent slope fail（14093KB） | 期刊论文 | 出版稿 | 限制开放 | ODC PDDL | 浏览 | |
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