划分重磁区域异常与局部异常的一种方法泛克立格法

在重（磁）资料的分析处理中，经常需要划分区域异常与局部异常。本文对用于矿床品位预测的方法—泛克立格法加以改进、完善，使其适合于求重（磁）资料的区域异常与局部异常。根据某点周围若干个信息点上的重（磁）观测数据估计出该点处的区域异常值，而且这种估计是在满足线性、无偏、最小估计方差条件下求得的。从重（磁）观测数据中减去区域异常就可得到局部异常，这就是泛克立格法。它比经常用来划分区域异常与局部异常的方法—趋势分析方法有许多优点。趋势分析方法只是泛克立格法的一个特例。在本文中，作者还提出在小范围内，重力区域异常适合于用一次多项式拟合；而磁法区域异常适合于用二次多项式拟合的观点

UNIVERSAL KRIGING-A METHOD USED IN DIVISION OF REGION AL AND LOCAL GRAVITY(MAGNETIC) ANOMALIES

Universal kriging, a method used primitively for predicting gold content of gold deposit, is improved and replenished to be adapted for dividing gravity(or magnetic)observed data into regional and local gravity(or magnetic) anomalies. It is an estimation method with high precision and good effectiveness. Regional anomaly datum in a point is estimated according to the data in some information points around some point. The estimation of regional anomaly is obtained under the conditions of linear, unbiased and minimum variance of estimation. Local anomalies are got in subtracting regional anomaly from primitively observed data. This is the basic idea of universal kriging. It has many advantages which trend analysis method has not.