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Canyon-related undulation structures in the Shenhu area, northern South China Sea
Qiao, Shaohua1,2; Su, Ming1,3; Kuang, Zenggui4; Yang, Rui1,3; Liang, Jinqiang4; Wu, Nengyou1,3
2015-09-01
Source PublicationMARINE GEOPHYSICAL RESEARCH
Volume36Issue:2-3Pages:243-252
AbstractThe characteristics and origin of seafloor and subsurface undulations were studied in the Shenhu area, northern South China Sea using high-precision multibeam bathymetric map and high-resolution 2D seismic data. Two undulation structure fields associated with submarine canyons have been identified. One structure field is developed in canyon head areas and shows waveform morphology on the bathymetric map. The waves display wavelengths and wave heights of 1-2 km and 20-50 m, respectively, generally occur on slopes from 1 degrees to 5 degrees, and extend for about 15 km approximately parallel to the canyon's orientation. The other structure field is developed in the lower segment or mouth area of submarine canyons. In general, the waves display wavelengths and wave heights of 1.3-3.6 km and 50-80 m, respectively, occur on slopes of approximately 2 degrees, and extend for more than 20 km. Sediment cores from crests between submarine canyons in the lower segment include predominantly silts and clayey silts. Since undulations in the two fields show differences in morphology and internal architectures, two different formation mechanisms are suggested. Seafloor undulations in the head area of submarine canyons are interpreted as creep folds induced by soft sediment deformation. Undulation structures in the lower segment or the mouth area of submarine canyons are sediment waves constructed by turbidity currents overflows along the submarine canyons.
SubtypeArticle
KeywordUndulation Structures Sediment Waves Gravitational Deformation Seafloor Topography Submarine Canyon Shenhu Area South China Sea
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s11001-015-9252-1
WOS Subject ExtendedGeochemistry & Geophysics ; Oceanography
WOS KeywordRIVER MOUTH BASIN ; CURRENT SEDIMENT WAVES ; LOBE TRANSITION ZONES ; DEEP-WATER ; TURBIDITY CURRENTS ; ADRIATIC SHELF ; CONTINENTAL-SLOPE ; SEISMIC FEATURES ; CHANNEL LEVEES ; ROCKALL TROUGH
Indexed BySCI
Language英语
WOS SubjectGeochemistry & Geophysics ; Oceanography
WOS IDWOS:000356605400012
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10510
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China
4.Guangzhou Marine Geol Survey, Guangzhou 510075, Guangdong, Peoples R China
First Author AffilicationGuangZhou Institute of Energy Conversion,Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Qiao, Shaohua,Su, Ming,Kuang, Zenggui,et al. Canyon-related undulation structures in the Shenhu area, northern South China Sea[J]. MARINE GEOPHYSICAL RESEARCH,2015,36(2-3):243-252.
APA Qiao, Shaohua,Su, Ming,Kuang, Zenggui,Yang, Rui,Liang, Jinqiang,&Wu, Nengyou.(2015).Canyon-related undulation structures in the Shenhu area, northern South China Sea.MARINE GEOPHYSICAL RESEARCH,36(2-3),243-252.
MLA Qiao, Shaohua,et al."Canyon-related undulation structures in the Shenhu area, northern South China Sea".MARINE GEOPHYSICAL RESEARCH 36.2-3(2015):243-252.
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