COUPLING AND TRANSITION OF THE MESOZOIC BASIN-MOUNTAIN ON THE NORTHERN EDGE OF NORTH CHINA PLATFORM AND ITS DYNAMICS ANALYSIS

The basin-mountain relation on North China Platform from Late Triassic to Middle Jurassic is that the Inner Mongolian Axis was compressed and uplifted,while the piedmont basin was flexed and sunk,forming the coal-bearing formation on its southern side;The basin was migrated northward in Late Jurassic,and in the piedmont basins with EW and NE directions in the southern and eastern parts of Inner Mongolian Axis,the substance from adjacent mountainous areas was deposited,forming the molasse formation;In early Cretaceous the basin was developed as the fault basin with NNE direction in the environment of regional extension,and the coupling relationship of basin-mountain still was the shallow level one;the high place was denuded and the low place was filled.In the basin-mountain transfer and evolution,the diversion from Paleoasia oceanic tectonic domain to circle Pacific one was completed.The diversion had been completed under the cooperation of various dynamic factors among inside and outside of plate,Earth and solar system.