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Features and dynamic mechanisms of Cenozoic tectonic migration and its impact on hydrocarbon accumulation in the northern South China Sea
Received:December 03, 2013  Revised:September 17, 2014
Key words:tectonic migration, Cenozoic, hydrocarbon accumulation, northern South China Sea
中文关键词:  构造迁移,新生代,油气成藏,南海北部
Author NameAffiliationPostcode
Yin Zhengxin School of Marine Sciences,Sun Yat-sen University 510006
Cai Zhourong* School of Marine Sciences,Sun Yat-sen University 510006
Wan Zhifeng School of Marine Sciences,Sun Yat-sen University 
Lv Baofeng schools of marine sciences,Sun Yat-sen Universty 
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      The northern continental margin of the South China Sea (SCS) is located within the tectonic system of Southeast Asia, an area with a great deal of tectonic migration due to the regional tectonic movements. In this paper, we comprehensively analyze the available geological and geophysical data of the area in order to demonstrate the typical migration patterns of the Cenozoic tectonics in northern SCS caused by the episodes of the Cenozoic tectonic movement. Furthermore, we wanted to assess the lateral variation characteristics of the strata and the different evolution patterns of the main basins’ features. We primarily focus on: (1) the Cenozoic episodic rifting from north to south in the continental margin of the northern SCS. (2) the rifting and depression time of the main basins progressively become younger as you go from north to south, signifying that the migration of both the tectonics and the sediments within the northern SCS travelled from north to south during the Cenozoic, and (3) the lateral tectonic migration on the direction of EW is not regular in total, but in some local areas there’s the trending of tectonic migration from west to east. Analysis of the tectonic migration features of the northern SCS, in combination with the regional tectonic evolution background, indicates that the observed remote lagging effect, resulted from the India-Eurasia plate collision, is the main dynamic mechanism involved in tectonic migration within the northern SCS. Tectonic migration has significant influence on both the organization of petroleum deposits and on hydrocarbon accumulation within the basins in the northern SCS; comprehensive understanding of this dynamic system is of great reference value in predicting hydrocarbon accumulation and has the potential to have an enormous impact in discovering new deep reservoirs for future oil-gas exploration.
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