青藏高原东缘作为现今地球上最活跃的喜马拉雅—青藏高原巨型造山带的东部边界,是由印度—欧亚大陆新生代期间持续汇聚作用所造就的新大地构造边界带。它自北向南被海原活动断裂带、东昆仑活动断裂带、鲜水河—小江活动断裂系、红河断裂带等大型左旋走滑断裂分割成多个活动构造区。各区地壳变形特征各异,但又具有内在构造动力联系,呈现出极为复杂的活动构造体系和典型的条—块结构。青藏高原东缘是中国东、西部间最显著的地貌梯度带,也是极为醒目的地球物理异常梯度带。同时,它既是现今地壳运动速度急速锐减或转折的 The east boundary of the Qinghai-Tibet Plateau, as the most active Himalayan-Tibetan giant orogen on the present day, is the new tectonic boundary zone created by the continuous convergence of the Indo-Eurasian Cenozoic. It is divided into several active tectonic zones from north to south by large-scale left-lateral strike-slip faults such as Haiyuan active fault zone, East Kunlun active fault zone, Xianshuihe-Xiaojiang active fault system and Honghe fault zone. The deformation characteristics of the crust in each area are different, but they also have the intrinsic tectonic connection, showing a very complicated active tectonic system and a typical bar-block structure. The eastern edge of the Qinghai-Tibet Plateau is the most prominent geomorphologic gradient zone between the eastern and western parts of China. It is also a striking geophysical anomaly gradient zone. At the same time, it is both a sharp drop in current crustal movement or turning point