东北与华北克拉通相邻，其中、新生代是否也经历过岩石圈减薄是凾带解决的核心科学问题之一。现有观测资料揭示的东北地区的上地幔顶部速度结构尚存明显不一致的现象，特别是松辽盆地下方的岩石圈厚度具有较大争议。高分辨的接收函数成像是目前获取岩石圈和软流圈界面比较有效的方法之一。与华北克拉通相比，东北地区岩石圈结构研究程度要低。本项目拟充分利用东北固定台站和宽频带流动台阵观测资料，开展S波接收函数Kirchhoff偏移成像研究，获取地壳和岩石圈结构，为东北及周边地区岩石圈演化的动力学模式提供深部重要的地震学约束。

Northeast China (NE China) is bounded by the North China craton (NCC) to the south. It is a key to understanding whether the Northeast China has experienced Mesozoic-Cenozoic lithospheric thinning or not. The uppermost mantle structure beneath NE China is not well constrained so far, evident from considerable variations among different models, thus controversial question persist especially about the estimation of lithospheric thickness beneath the Songliao Basin. Receiver function analysis has been developed as an effective tool for mapping lithosphere-asthenosphere boundary (LAB) in the upper mantle with high resolution. Compared with the NCC, the lithospheric structure beneath NE China is poorly understood. New constraint on the crustal and lithospheric thickness beneath NE China can be derived from S-wave receiver functions with pre-stack Kirchhoff migration method using large data set collected at both dense temporary seismic arrays and the permanent networks in that region. We mainly focus on the lateral variation in the crustal and lithospheric thickness beneath NE China and shed light on dynamic process involved in NE China and adjacent regions.