关键词: 青藏高原, 构造演化, 隆起运动, 盆地, 第四纪

Abstract: Based on the recent field work,we analyze the geological geomorphic characteristics,activity ways and formation ages of the NNW tectonics developed in the northern Tibet plateau The results indicate that this NNW tectonics exists in all the area from north to the east of Kunlun moutain to the Hexi corridor In geomorphology it represents the structural configuration of uplift downsink jaxuposition from east to west The NNW faults developed in the east margin of the uplift zone as fold companion thrust compression zone The downsink zones are composed of a series of depressive basins located between middle and late Quaternary,highly active which not only control the formation and development of the geomorphic feathers but also play vital roles to seismic activity and orogeny and occurrence of strong events The NNW tectonics began to develop from the late Tertiary to early Quaternary and uplift of large scales happened from middle Pleistocene

Key words: Qinghai Xinzang plateau, Structure evolution, Uplift movement, Basin, Quaternary