利用背景场与重力异常的相关性确定构造指数

欧拉反褶积是反演场源位置的有效方法,其中构造指数的确定是欧拉反褶积的关键。文章在前人基础上详细推导了欧拉反褶积计算的背景场与重力异常之间的关系,理论公式表明可利用二者之间的相关性确定构造指数。球体、水平圆柱体和有限台阶的模型实验表明,该方法可有效地选取构造指数。为提高相关性计算的抗干扰性,利用正则化稳定因子消除重力异常中的高频噪声,模型试验效果良好。将此方法应用于葫芦岛市黑鱼沟某矿洞重力数据,反演结果与实际情况基本吻合,证实了该方法的有效性。

Structural index determination using the correlation between background field and gravity anomaly

Euler deconvolution is an effective method to invert the location of field source, and the determination of structural index is the key to Euler deconvolution. In this paper, the relationship between background field and gravity anomaly calculated by Euler deconvolution is deduced on the basis of the predecessors. The theoretical formula indicates that the correlation between background field and gravity anomaly can be used to determine the structural index. The model experiments of sphere, horizontal cylinder and fault show that this method can effectively determine the structure index. In order to improve the anti-interference of the correlation calculation, the regularized stabilization factor is used to eliminate the high-frequency noise in the gravity anomaly, and the model test shows good rusult. Applying this method to the gravity data of a mine hole in Heiyugou, Huludao City, the inversion results correspond with the actual situation, which confirms the effectiveness of the proposed method.