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我们进行磁力解释时常常假设感应磁化与模型几何形态为已知的,或者假设已知震源空间方位,据此求出总磁化率。本文介绍了一种同时估算总磁化方向与震源的空间方位的3D磁力解释法。该方法以磁力位的多项式或级数展开代近似表示磁异常,并保留了震源的二阶矩量。然后对级数中的矩量及其线性组合进行反演后求出磁异常,假设总磁化的方向为常数,但幅度是可变的。该方法同时假设磁化强度的异常分布在远离观测点限定体积区内具有非零值。并提供了在偶极矩量中心相交的三个对称的
When we carry out the magnetic explanation, we often assume that the induced magnetization and the model geometry are known, or we can get the total magnetic susceptibility from the assumption that the source orientation is known. This paper presents a 3D magnetic interpretation method that simultaneously estimates the direction of total magnetization and the spatial orientation of the source. This method approximates the magnetic anomaly with the polynomial or series expansion of the magnetic force and retains the second moment of the source. Then, the magnetic anomalies are obtained by inverting the moments in the series and their linear combinations. Assuming that the direction of the total magnetization is constant, the magnitude is variable. The method also assumes that the anomaly distribution of magnetization has a nonzero value within a limited volume region away from the observation point. And provides three symmetrical intersections at the center of the dipole moments