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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
Source PublicationMARINE GEOPHYSICAL RESEARCH
Volume34Issue:3-4Pages:239-257
AbstractBased 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.
SubtypeArticle
KeywordDeep-water Sedimentation Bottom Current Contourite Mass-wasting Deposits South China Sea
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s11001-013-9191-7
WOS Subject ExtendedGeochemistry & Geophysics ; Oceanography
WOS KeywordCONTINENTAL-MARGIN ; INTERMEDIATE WATER ; NORTHERN ; WAVES ; CIRCULATION ; INTRUSION ; CLASSIFICATION ; STRATIGRAPHY ; MORPHOLOGY ; PRODUCTS
Indexed BySCI
Language英语
WOS SubjectGeochemistry & Geophysics ; Oceanography
WOS IDWOS:000328450000007
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/9148
Collection中国科学院广州能源研究所
Affiliation1.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
Recommended Citation
GB/T 7714
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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