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学科主题: Geology
题名: Controlling factors on the submarine canyon system: A case study of the Central Canyon System in the Qiongdongnan Basin, northern South China Sea
作者: Su, M ; Zhang, C ; Xie, XN ; Wang, ZF ; Jiang, T ; He, YL ; Zhang, CM
通讯作者: suming@ms.giec.ac.cn
关键词: submarine canyon system ; relative sea level change ; sediment supply ; tectonic activity ; Qiongdongnan Basin
刊名: SCIENCE CHINA-EARTH SCIENCES
发表日期: 2014
卷: 57, 期:10, 页:2457-2468
收录类别: sci
部门归属: [Su Ming] Chinese Acad Sci, Guangzhou Inst Energy Convers, Lab Gas Hydrate Format Mech, Guangzhou 510640, Guangdong, Peoples R China ; [Su Ming] Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China ; [Su Ming ; Zhang Cheng ; Xie XiNong ; Jiang Tao ; He YunLong] China Univ Geosci, Key Lab Tecton & Petr Resources, Minist Educ, Wuhan 430074, Peoples R China ; [Wang ZhenFeng] China Natl Offshore Oil Zhanjiang Ltd Corp, Zhanjiang 524057, Peoples R China ; [Zhang CuiMei] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China
项目归属: 海洋地质
资助者: Major Research Plan of the National Natural Science Foundation of China [91028009]; Young Scientists Fund of the National Natural Science Foundation of China [41002031]; Foundation of State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum [PRP/open-1205]
摘要: Based on an integrated analysis of high-resolution 2D/3D seismic data and drilling results, this study analyzes the tectonicsedimentary evolution of the Qiongdongnan Basin (QDNB) since the late Miocene, and discusses the controlling factors on the formation and development of the Central Canyon System (CCS). The sediment failures caused by the relative sea level falling might have discharged deposits from the slope to the canyon. The two suits of the infillings, i.e., turbidites and mass transport complex (MTC), were derived from the northwestern source and northern source, respectively. The sediment supplies, which differ significantly among different areas, might have led to the variations observed in the internal architectures. Tectonic transformation around 11.6 Ma had provided the tectonic setting for the CCS and formed an axial sub-basin in the central part of the Changchang Depression, which could be called the rudiment of the CCS. The tectonic activity of the Red River Fault (RRF) at about 5.7 Ma might have strengthened the hydrodynamics of the deposits at the junction of the Yinggehai Basin (YGHB) and the QDNB to trigger a high-energy turbidity current. The MTC from the northern continental slope system might have been constrained by the Southern Uplift, functioning as a bather for the infillings of the CCS. Thanks to a sufficient sediment supply during the Holocene period and the paleo-seafloor morphology, the relief of modern central canyon with the starving landform in the eastern Changchang Depression might have been accentuated by deposition of sediments and vertical growth along the canyon flanks, where collapse deposits were widely developed. Corresponding to the segmentation of the CCS, the forming mechanisms of the canyon between the three segments would be different. The turbidite channel in the head area had likely been triggered by the abundant sediment supply from the northwestern source together with the fault activity at about 5.7 Ma of the RRF. The formation and evolution of the canyon in the western segment were caused by combined effects of the turbidite channel from the northwestern source, the MTC from the northern continental slope, and the paleo-seafloor geomorphology. In the eastern segment, the canyon was constrained by the tectonic transformation occurring at approximately 11.6 Ma and the insufficient sediment supply from the wide-gentle slope.
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WOS记录号: WOS:000343363600018
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10601
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Su, M; Zhang, C; Xie, XN; Wang, ZF; Jiang, T; He, YL; Zhang, CM.Controlling factors on the submarine canyon system: A case study of the Central Canyon System in the Qiongdongnan Basin, northern South China Sea,SCIENCE CHINA-EARTH SCIENCES,2014,57(10):2457-2468
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