地质单元法区域成矿预测

网格单元法和地质体单元法是目前运用在矿产预测中最普遍的地质统计方法，2种方法各有优缺点。为了更好地使2种方法扬长避短，以青海省祁漫塔格地区接触交代型铁铜矿床为例，在其找矿预测模型的背景下，运用网格法和地质体法分别进行资源预测；并在运用地质体单元法时，在传统的圈定地质体界限的同时，也对地质体本身进行了网格划分，从而进一步进行证据权的计算，得到后验概率值。2种方法得到的结果较一致，证明新地质体法的可靠性。将预测结果结合地质体分级情况、地质体法和网格法阈值大小综合考虑，圈定出预测远景区，从而划定靶区。预测出的靶区既是找矿后验概率的高值区域，又是成矿最有利的地质体区域。

Methods of Geological Statistics in Prediction of Mineral Resources

The block method and the geologic body unit method are two most common statistic methods in mineral prediction, but both have advantages and disadvantages. Taking contact metasomatic iron copper deposits in Qimantage as examples, authors introduce the mineral resource prediction of these deposits by the two methods mentioned above on basis of the prospecting prediction model. The geologic body unit method is used to delineate the boundaries of geological bodies; meanwhile, the geologic block method is used to divide the geologic body into geologic grid. The results of the two methods are consistent with each other, which indicates that the new body method is credible. Finally, the authors prospect the target areas based on the forecast area. The target areas are not only the high value areas in posterior probability but also the most favorable mineralized areas.