中高山区高精度航磁视磁化强度填图方法

Apparent magnetization mapping from high resolution aero magnetic data in the region of high topographic relief

利用GPS高度和DTM高度数据,通过地形等效变换方法进行中高山区视磁化强度填图,避开了目前还不太有效的曲面地形改正方法问题,获得了精度较高的视磁化强度反演结果.这种适合于起伏地形、起伏测量面的视磁化强度填图方法为今后中高山地区航磁异常解释提供了一个可行的方法和解决问题的新思路.本文给出了中高山区起伏观测面下航磁资料的无负值视磁化强度填图方法,并通过模型和实际资料处理验证了这种方法的正确性.

Magnetization mapping using both GPS altitude and DTM data eliminates the need to make terrain correction to the observed magnetic field data, acquires more precise magnetization data than the usual methods which don't consider the terrain relief. In this paper, a new method of apparent magnetization mapping from high resolution aero magnetic data, without negative values, for draped\|survey flying in rugged terrain is presented. The approach is demonstrated on theory models and real aeromagnetic survey of one area of YunNan, China.