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Flow processes and sedimentation in unidirectionally migrating deep-water channels: From a three-dimensional seismic perspective
Gong, Chenglin1,2; Wang, Yingmin3; Steel, Ronald J.2; Peakall, Jeff4; Zhao, Xiaoming5; Sun, Qiliang6
2016-04-01
发表期刊SEDIMENTOLOGY
卷号63期号:3页码:645-661
文章类型Article
摘要Three-dimensional seismic data were used to infer how bottom currents control unidirectional channel migration. Bottom currents flowing towards the steep bank would deflect the upper part of sediment gravity flows at an orientation of 1 degrees to 11 degrees to the steep bank, yielding a helical flow circulation consisting of a faster near-surface flow towards the steep bank and a slower basal return flow towards the gentle bank. This helical flow model is evidenced by the occurrence of bigger, muddier (suggested by low-amplitude seismic reflections) lateral accretion deposits and gentle channel wall with downlap terminations on the gentle bank and by smaller, sandier (indicated by high-amplitude seismic reflectors) channel fills and steep channel walls with truncation terminations on the steep bank. This helical flow circulation promotes asymmetrical depositional patterns with dipping accretion sets restricted to the gentle bank, which restricts the development of sinuosity and yields unidirectional channel migration. These results aid in obtaining a complete picture of flow processes and sedimentation in submarine channels.
关键词Bottom Current-controlled Sedimentation Helical Flow Circulation The Interplay Of Turbidity And Bottom Currents Unidirectionally Migrating Deep-water Channels West African Margin
DOI10.1111/sed.12233
收录类别SCI
语种英语
WOS记录号WOS:000372342200006
引用统计
被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/126200
专题海洋地质与环境重点实验室
作者单位1.China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing 102249, Peoples R China
2.Univ Texas Austin, Jackson Sch Geosci, Dept Geol Sci, Austin, TX 78712 USA
3.Zhejiang Univ, Ocean Coll, Hangzhou 310058, Zhejiang, Peoples R China
4.Univ Leeds, Sch Earth & Environm, Leeds LS2 9JT, W Yorkshire, England
5.Southwest Petr Univ, Sch Geosci & Technol, Sichuan 610500, Peoples R China
6.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
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GB/T 7714
Gong, Chenglin,Wang, Yingmin,Steel, Ronald J.,et al. Flow processes and sedimentation in unidirectionally migrating deep-water channels: From a three-dimensional seismic perspective[J]. SEDIMENTOLOGY,2016,63(3):645-661.
APA Gong, Chenglin,Wang, Yingmin,Steel, Ronald J.,Peakall, Jeff,Zhao, Xiaoming,&Sun, Qiliang.(2016).Flow processes and sedimentation in unidirectionally migrating deep-water channels: From a three-dimensional seismic perspective.SEDIMENTOLOGY,63(3),645-661.
MLA Gong, Chenglin,et al."Flow processes and sedimentation in unidirectionally migrating deep-water channels: From a three-dimensional seismic perspective".SEDIMENTOLOGY 63.3(2016):645-661.
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