Abstract: From 1992 to 1995, the author took part in the field investigations in Tarim basin and its surrounding areas, such as the Altun, Kunlun, Karakorum Mts. This paper will briefly deal with geodynamics of the northwestern edge of Qinghai-Xizang(Tibet) plateau based on regional study on neotectonic zonation, active faults and folds, vertical crustal movement, seismic activities and Cenozoic volcanoes and the like. All the features show that the northwestern edge of the Qinghai-Xizang(Tibet) plateau is the most active region within the plateau. From the viewpoint of geodynamics, apart from the northward subduction of the Indian plate, the Tarim basin has southward subducted to the Qinghai-Xizang (Tibet) plateau, whose lithophere is undergoing pushing around and escaping and penetrating to the upper and lower parts respectively.

Key words: Qinghai-Xizang plateau, Altun Mt., Geodynamics, Subduction

摘要： 从新构造单元划分、活动断层、活动褶皱、地壳升降运动、地震活动及新生代火山活动等方面论述了该地区的新构造及现代构造运动特征,最后讨论了该区和青藏高原形成的地球动力学问题。认为青藏高原在其形成过程中既有印度板块的向北俯冲和碰撞作用,又有塔里木块体的向南楔入,既有高原物质向外扩展作用,又有周边拗陷向高原内部渗透作用,所以青藏高原的岩石圈是处于一个四面受压,上出下入的动力学状态。

关键词: 青藏高原, 阿尔金山, 地球动力学, 俯冲带