Title: Tectonic evolution of deepwater area of northern continental margin in South China Sea
Abstract:The Cenozoic structure of the deepwater area in the northern South China Sea was generated under the condition of two times of basin expansion and short-term reconstruction in different directions of ...The Cenozoic structure of the deepwater area in the northern South China Sea was generated under the condition of two times of basin expansion and short-term reconstruction in different directions of South China Sea and was also controlled by the actions of Honghe fault strike-slip and Philippine Plate extrusion.The tectonic evolution experienced the intracontinental rift period,intercontinental thermal subsidence period and neotectonic period of quasi-passive continental margin.In the intracontinental rift period,the basin structure was in the north-south sub-zone and east-west sub-section shape and then formed the basin-range extensional structure.In the intercontinental thermal subsidence period,the rift occurred in the current South China Sea,and the north edge of the rift was in the northern passive continental margin with regional thermal subsidence.Since the Late Miocene,the regional subsidence action occurred in the margin of South China Sea.The Indian Plate extrusion from the east part and Philippine Plate extrusion from the west part made the continental margin of the northern South China Sea keeping bidirectional extrusion status.So,two types of depressions exited in the east and west areas of the continental margin in the northern South China Sea.One is the half graben depression,and the other is the graben depression.The former includes North Reef Depression,Shunde Depression,Kaiping Depression and satellite depressions outside of Baiyun Depression,the latter includes Lingshui-Ledong Depression,Songnan-Baodao Depression and Baiyun Depression.Relative to the half graben depression,the three large graben depressions,with a wide sedimentary range and large subsidence,together constitute the deepwater area rich in oil and gas and may become a strategic replacement area for oil and gas of South China Sea.Read More
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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Cited By Count: 34
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