大陆岩石圈厚度与结构以及软流圈横向变化特征往往与深部热作用等直接相关，然而，有关青藏高原东北缘及其外围克拉通盆地的岩石圈厚度与结构的研究结果存在诸多争议，涉及软流圈空间展布特征的研究相对更少。本项目拟利用多个流动台阵和周边固定地震台站的资料，采用不依赖于平面波假设的P波和S波接收函数三维偏移成像技术，获得岩石圈底界面的横向变化；利用面波层析成像获得周期达200s的瑞利波相速度分布；采用接收函数和面波联合反演技术，揭示横跨重要构造边界、深度达300km的S波速度结构；重点揭示壳幔岩石圈结构特征、岩石圈－软流圈边界横向变化特征和软流圈展布特征，为青藏高原隆升和陆、陆碰撞数值模拟研究提供边界约束，为青藏高原动力学研究等提供新的深部信息。

The thickness of continental lithosphere and the spatial variation characteristics asthenosphere are often directly related to the deep thermal effect. However, there are many controversial findings about the lithosphere thicknesses of the northeastern margin of the Tibetan Plateau and its surounding cratonic basins, and relatively less studies involving the spatial distribution characteristics of their asthenosphere. This project intends to take advantage of data from multiple seismic arraies and the nearby permanent stations, using the three-dimensional P-wave and S-wave receiver function migration imaging technology without the plane wave assumption, access to the lateral variation of the lithosphere bottom boundary; using the surface wave tomography, to obtain the Rayleigh wave phase velocity distribution with the long period reach 200s; using the joint inversion from receiver function and surface wave, to reveal the S-wave velocity structure with a depth of 300km across the important construct border; Focus to reveal the crustal and mantle lithosphere structure characteristics, the lateral variation lithosphere - asthenosphere boundary and the spatial variation characteristics asthenosphere, furthermore to provide new information to constraint the numerical simulation of the Plateau Uplift and the continent-continental collision, and to study the deep dynamics of Plateau.