任意形状地质体数值积分法重磁场三维可视化反演

D VISUALIZED INVERSION ON THE GRAVIMAGNETIC FIELD OF ARBITRARILY SHAPED BODIES USING NUMERICAL INTEGRATION METHOD

任意形状地质体数值积分法重磁场三维可视化反演,采用辛普生积分和梯形积分实现三度体磁场三重积分的近似计算,模型修改在剖面内完成,对x,y不同方向剖面逐条修改拟合,克服了模型难以修改和细化的困难。在W indows环境下,用V isual C语言、OpenGL函数实现了复杂立体模型的三维可视化反演。该方法适合于开采阶段的交互反演解释,将该方法运用于大冶铁矿,取得了很好的地质效果。

The approximate calculation on the triple integral of the maguetic field of 3D bodies is accomplished by the adoption of Simpson integration and trapezoidal integration in the 3D visualization inversion method. The model is modified and simulated in every profile in x and y direction, thus facilitating the model modification and refinement. Moreover, the 3D visualized inversion of complicated three -dimensional models is completed by the Open- GL function and Visual C language in Windows operation system. The refined inversion and interpretation of arbitrarily selected profiles or sections can be carried out in this environment. Suitable for the interactive inversion and interpretation in exploitation stage, this method is finally applied in dealing with geomagnetic data of the Daye iron deposit with satisfactory results.