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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
发表期刊MARINE GEOPHYSICAL RESEARCH
卷号36期号:2-3页码:243-252
摘要The 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.
文章类型Article
关键词Undulation Structures Sediment Waves Gravitational Deformation Seafloor Topography Submarine Canyon Shenhu Area South China Sea
WOS标题词Science & Technology ; Physical Sciences
DOI10.1007/s11001-015-9252-1
研究领域[WOS]Geochemistry & Geophysics ; Oceanography
关键词[WOS]RIVER MOUTH BASIN ; CURRENT SEDIMENT WAVES ; LOBE TRANSITION ZONES ; DEEP-WATER ; TURBIDITY CURRENTS ; ADRIATIC SHELF ; CONTINENTAL-SLOPE ; SEISMIC FEATURES ; CHANNEL LEVEES ; ROCKALL TROUGH
收录类别SCI
语种英语
WOS类目Geochemistry & Geophysics ; Oceanography
WOS记录号WOS:000356605400012
引用统计
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/10510
专题中国科学院广州能源研究所
作者单位1.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
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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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