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Depositional characteristics and spatial distribution of deep-water sedimentary systems on the northwestern middle-lower slope of the Northwest Sub-Basin, South China Sea
Chen, Hui1,2; Xie, Xinong1; Van Rooij, David2; Vandorpe, Thomas2; Huang, Li1; Guo, Laiyuan1; Su, Ming3,4
2013-12-01
发表期刊MARINE GEOPHYSICAL RESEARCH
卷号34期号:3-4页码:239-257
摘要Based upon 2D seismic data, this study confirms the presence of a complex deep-water sedimentary system within the Pliocene-Quaternary strata on the northwestern lower slope of the Northwest Sub-Basin, South China Sea. It consists of submarine canyons, mass-wasting deposits, contourite channels and sheeted drifts. Alongslope aligned erosive features are observed on the eastern upper gentle slopes (< 1.2A degrees above 1,500 m), where a V-shaped downslope canyon presents an apparent ENE migration, indicating a related bottom current within the eastward South China Sea Intermediate Water Circulation. Contourite sheeted drifts are also generated on the eastern gentle slopes (similar to 1.5A degrees in average), below 2,100 m water depth though, referring to a wide unfocused bottom current, which might be related to the South China Sea Deep Water Circulation. Mass wasting deposits (predominantly slides and slumps) and submarine canyons developed on steeper slopes (> 2A degrees), where weaker alongslope currents are probably dominated by downslope depositional processes on these unstable slopes. The NNW-SSE oriented slope morphology changes from a three-stepped terraced outline (I-II-III) east of the investigated area, into a two-stepped terraced (I-II) outline in the middle, and into a unitary steep slope (II) in the west, which is consistent with the slope steepening towards the west. Such morphological changes may have possibly led to a westward simplification of composite deep-water sedimentary systems, from a depositional complex of contourite depositional systems, mass-wasting deposits and canyons, on the one hand, to only sliding and canyon deposits on the other hand.
文章类型Article
关键词Deep-water Sedimentation Bottom Current Contourite Mass-wasting Deposits South China Sea
WOS标题词Science & Technology ; Physical Sciences
DOI10.1007/s11001-013-9191-7
研究领域[WOS]Geochemistry & Geophysics ; Oceanography
关键词[WOS]CONTINENTAL-MARGIN ; INTERMEDIATE WATER ; NORTHERN ; WAVES ; CIRCULATION ; INTRUSION ; CLASSIFICATION ; STRATIGRAPHY ; MORPHOLOGY ; PRODUCTS
收录类别SCI
语种英语
WOS类目Geochemistry & Geophysics ; Oceanography
WOS记录号WOS:000328450000007
引用统计
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/9148
专题中国科学院广州能源研究所
作者单位1.China Univ Geosci, Fac Resources, Minist Educ, Key Lab Tecton & Petr Resources, Wuhan 430074, Peoples R China
2.Univ Ghent, Renard Ctr Marine Geol, Dept Geol & Soil Sci, B-9000 Ghent, Belgium
3.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy & Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China
4.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China
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Chen, Hui,Xie, Xinong,Van Rooij, David,et al. Depositional characteristics and spatial distribution of deep-water sedimentary systems on the northwestern middle-lower slope of the Northwest Sub-Basin, South China Sea[J]. MARINE GEOPHYSICAL RESEARCH,2013,34(3-4):239-257.
APA Chen, Hui.,Xie, Xinong.,Van Rooij, David.,Vandorpe, Thomas.,Huang, Li.,...&Su, Ming.(2013).Depositional characteristics and spatial distribution of deep-water sedimentary systems on the northwestern middle-lower slope of the Northwest Sub-Basin, South China Sea.MARINE GEOPHYSICAL RESEARCH,34(3-4),239-257.
MLA Chen, Hui,et al."Depositional characteristics and spatial distribution of deep-water sedimentary systems on the northwestern middle-lower slope of the Northwest Sub-Basin, South China Sea".MARINE GEOPHYSICAL RESEARCH 34.3-4(2013):239-257.
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