青藏高原东北缘地处华北、华南和青藏三大亚板块的交汇区，是青藏高原向北东方向扩展的前缘部位。研究该区域磁异常空间变化、居里等温面和岩石圈热状态分布，对揭示青藏高原及其周边动力学过程和发震机理有重要意义。本项目拟综合利用2000年8月至2010年9月的CHAMP卫星和2013年以来的Swarm卫星磁测数据、地面和航磁资料，研究青藏高原东北缘磁异常及其梯度的空间分布。利用磁异常的等效磁偶极源法估算居里等温面深度，进而利用居里等温面深度和大地热流数据反演地壳和岩石圈的热结构。目的是探索磁异常空间变化、居里等温面起伏与地震活动性、圈层结构之间的关系。

The northeast margin of Tibetan Plateau is located at the intersection of Northern China, Southern China and Tibetan Plateau subplates, being the frontier of the northeastward expansion of the plateau. Investigation of the spatial variation of crustal magnetic anomalies, the Curie isothermal surface and the distribution of lithospheric thermal state in this region is vital for revealing dynamical processes and seismo-genetic mechanisms of Tibetan Plateau and its nearby. This proposal combines satellite-measured data (of CHAMP satellite during August 2000 to September 2010 and Swarm satellite since 2013), ground and aeromagnetic surveys, to study the distribution of crustal magnetic anomalies and its gradients. The equivalent source magnetic dipole method of the magnetic anomalies shall be employed to calculate the Curie surface depth，which will be combined with data of heat flow to invert for the thermal structures of crust and lithosphere. The target is exploration of the relationship between the spatial variation of magnetic anomalies & topography of the Curie surface and the seismic activity & structure of circle layers.