引言在物化探工作中,为了发现矿化异常,指出找矿方向,常常需要研究在某区域内变化的量。区分出如重力、磁性和电阻率等物理性质或化学元素的含量在该测区内的区域背景和局部异常。对这类问题,人们从观测资料中采用趋势面分析或滑动平均的方法来近似地估计区域背景和区分局部异常。这些方法经过近几年的探索与实践,有的取得了一定的效果,有的 Introduction In the geophysical and geochemical exploration work, in order to discover mineralization anomalies and point out the prospecting direction, it is often necessary to study the amount of change in a certain area. The regional background and local anomalies such as gravitational, magnetic and resistivity physical properties or chemical element contents are distinguished from each other. For such problems, people use the trend surface analysis or the moving average method from the observation data to approximate the regional background and distinguish the local anomalies. After these methods have been explored and practiced in recent years, some have achieved some results, some of them