STRUCTURE AND GEODYNAMIC SETTlNG OF OIL AND GASBASINS IN THE PEOPLE'S REPUBLIC OF CHINA
Chen Fajing Wang Xinwen Zhang GuangyaChao Shoulian Luo Chuanrong(China university of Geosciences, Beijing )
Within the territory of the People's Republic of China, there are about 26 sedimentary basins containing oil and gas. These basins can be classified into two main types : (1) ex-tensional basins; (2) foreland or flexural basins. Basins of the first type are situated in the northwestern and central part of China, whereas basins of the second type within the eastern China. The following structural characteristics of exteusional and flexural basins have been discussed in this paper: (1) Subsidence history; (2)thermal history and (3)structural style and Kinematics. In combination with tectonic setting analysis of geophysical data and eruptive rocks, geodynamic setting of the two types of basins are established and the formation mechanism of basin is recognized to related to subduction of west Pacific plate and closing of Tethys ocean.