确定接触面的位场矢量方法

本文叙述了一种定量计算接触面参数的位场矢量方法.该方法以位场的频谱表示为基础,得出重磁异常函数向下延拓的表达式;再借助于归一化全梯度的非线性变换函数,可以定量地计算接触面的空间位置、埋藏深度及倾斜方向.为了克服位场函数在向下半空间延拓过程中产生的不稳定性,采用了径向频率随深度增加而发生位移的圆滑因子.该方法的优点在于能够得到稳定的计算结果、精度高、能直接地得出接触面在深部的空间参数.本文用几个模型试算和实例证明了这些优点.

A POTENTIAL FIELD VECTOR METHOD FOR DETERMINATION OF CONTACT PLANE

A potential field vector method for quantitative determination of parame-ters of contact plane is described in this paper. Based on the frequency spect-rum expression of potential field, this technique first obtains downward conti-nuation expression of gravity and magnetic anomaly function, and then, with thehelp of the normalized overall gradient nonlinear transformation function, ma-kes quantitative calculation for spatial position, buried depth and dip. In orderto overcome the unstability of the potential field function arising in the courseof its downward continuation towards lower half space, this technique adoptssmoothing factor for displacement of radial frequency with increasing depth.This method enables us to obtain stable calculation results with high preci-sion and to figure out directly spatial parameters of contact plane at depth.These merits have been demonstrated in this paper by means of tentative cal-culations with several models and some examples.