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以深部地球物理资料为基础，介绍了天山地震带上地幔的基本结构，讨论了天山不同地区上地幔介质的动力学性质和可能的驱动机制。认为水平挤压形变是造成西天山和天山毗邻西昆仑附近区域上地幔岩石圈缩短和增厚的主要原因；而在中天山和东天山靠近准噶尔盆地南缘一带，除了板块运动造成的水平挤压力之外，上地幔热物质有可能上浮甚至侵入到地壳之中。它们与水平运动一样，对壳内脆性介质的构造活动起到非常重要的作用，特别是地壳底部莫霍面附近的低速滑脱层成为震源区深部构造的一个明显标志。此外，自从印度亚洲大陆碰撞以来，天山部分地区固结冷却的山根有可能在多重挤压变形和小尺度热对流的共同作用下，脱离它们的原有的层位而沉入上地幔。
Based on the deep geophysical data, the basic structure of the upper mantle in the Tianshan seismic belt is introduced, and the dynamics and possible driving mechanism of the upper mantle medium in different parts of the Tianshan Mountains are discussed. It is considered that the horizontal crushing deformation is the main reason for the lithospheric shortening and thickening of the upper mantle in the area adjacent to the West Kunlun near the West Tianshan and Tianshan mountains. In the vicinity of the central part of Junggar Basin and the Tianshan Mountains, horizontal crush caused by plate movement In addition to the force, the upper mantle thermal matter may float up and invade the earth’s crust. Like horizontal motion, they play a very important role in tectonic activities of brittle medium in the crust. In particular, the low-speed skidding near the Moho in the bottom of the crust is a clear indication of the deep structure of the source area. In addition, since the collision between the Indian-Asian continent, the root of consolidation and cooling in some parts of Tianshan Mountains may have sunk into the upper mantle under the combined effects of multiple crushing deformation and small-scale convective heat convection.