Studies on the Sedimentary Basin Forming Dynamics in the China Sea Areas

In the China sea areas and its adjacent area, there are almost 50 sedimentary basins of different periods, different sizes, and different shapes, most of which distribute on the margin of continent while the main petroliferous basins distribute on the continental shelf. The origin, occurrence and development of the basins are determined by the structural evolution and reconstruction of the continental margin in different periods. Sedimentary basin forming dynamics system is the macroevolution and correlation of the sedimentary basin, the mantle, the asthenosphere, the lithosphere, and Moho discontinuity. The paper discusses the basin forming history of Bohai Sea, Yellow Sea, East China Sea and South China Sea, and their diastrophism is related to the plate collision, transform fault, orogene fold, the separation of continent and lithosphere, and expansion of seabed, thereby the different sedimentary basins are formed. Especially in the Mesozoic and Cenozoic Era, the structural evolution and long-term subsidence of the basins are of advantage to the generation and accumulation of hydrocarbon and reservoir. So far, 10 large-scale oilfield were found in the China sea areas.