结合不同高度磁测资料研究地壳磁异常，反演地壳磁性结构已成为地磁学研究的前沿课题之一。本项目利用卫星、航空、地面和海洋磁测资料建立的高阶地磁场模型、CHAMP卫星连续10年的（2000年8月～2010年9月）观测资料，以及塔里木盆地及邻区的航空、地面磁测数据，研究我国最大内陆盆地—塔里木盆地及周边地区地壳磁异常。内容包括磁异常及其梯度的空间展布、磁异常随高度的衰减特征、不同波长段对总体磁异常的贡献、磁异常的二维小波分解特点。拟采用功率谱法和等效偶极源方法计算居里面深度，揭示磁性层基底的起伏变化。探讨磁异常与山盆构造、深大断裂的联系，居里面深度与大地热流、地壳圈层结构的关系。研究结果可以为塔里木盆地及周边地区地质构造、岩石圈结构研究和地下资源探测等领域提供定量信息，同时对深入了解大陆动力学过程和地质演化研究有重要参考价值。

Study of the crustal magnetic field with a combination of magnetic measurements at different altitudes and inversion for magnetic structures of the Earth interior using the crustal anomaly is one of the most frontier research in geomagnetism. Based on a high degree geomagnetic spherical harmonic model constructed by satellites, marine, aeromagnetic and ground magnetic surveys, 10-yr (2000.8～2010.9) of data continually measured by the CHAMP satellite, as well as aeromagnetic and ground magnetic surveys in Tarim basin and its adjecent area, we investigate the crustal anomalies in this largest inland basin in China. We shall study the spatial distribution feature of magnetic anomaly and its gradient, the decay of the crustal magnetic anomaly with altitude, the contribution from different wavelength bands, and the characteristics of the magnetic anomaly through 2D wavelet decomposition. The power spectral method and the equivalent source method will be used to calculate the Curie-surface depth, to reveal the topography of the magnetic layer basement. The correspondence between the magnetic anomaly and tectonics & deep faults, and the relation between the depth of the Curie surface and terrestrial heat flow & crustal layer structures, shall be discussed. The results are anticipated to provide quantitative information for studies such as geologic and lithospheric structures in Tarim and around, exploration of undergrond resources. This may also provide a significant reference for the study of continental dynamic processes and geologic evolutions.