RETHINKING ABOUT THE TECTONIC EVOLUTION OF THE CENOZOIC CONTINENTAL MARGINAL BASIN OF THE WEST PACIFIC OCEAN IN ACCORDANCE WITH SOME IMPORTANT ADVANCES OF STUDIES OF PETROLEUM GEOLOGY IN EAST CHINA SEA——AN EVOLUTIONARY MODEL OF RESIDUAL BACK ARC BASINS DEVELOPED IN THE LOCATION OF TRENCHES RETREATING TOWARDS THE OCEAN

Asia is the most complicated continent in the view of global geological tectonics.There is not only mosaic structures consisting of small blocks and giant orogenic belts,but also modern continental margin with trenchs,island arc and basins lasting for 20 000 km.Chinese geologists,presented by Academian Huang Jiqing and Zhu xia,elaborated the geological tectonics of China by theories of "polycycle","three tectonic domains (PaleoAsian,marginal-Pacific and Tethyan-Himalayan tectonic domains)"and "two frontal lines both in west and east".Under the light of their theories,the tectonic evolution of continental margin of west Pacific ocean and the development of basins in the area were studied with the idea of "trench retreating towards ocean and residual backarc basins",which was in accordance with some important advances of studies of petroleum geology in East China Sea.