Application Research of Indicator Kriging in 3D Mineral Resources Estimation—A Case Study of Porphyry Cu-Au Deposits in Anhui Province
This study focuses on a large-scale porphyry Cu-Au deposit in Anhui province as the research subject.Based on the indicator Kriging method,the study estimates the Cu resources of the deposit and compares the estimation results with those obtained using the traditional geometric method and the ordinary Kriging method to evaluate the applicability and rationality of the indicator Kriging method.The research results indicate that:although there is some deviation in the indicator kriging estimation results compared to the other two methods,they are within the error range,indicating that the indicator kriging method is suitable for resource estimation of porphyry Cu-Au deposits;the indicator Kriging method,considering the spatial distribution characteristics of grade data and the influence of the extra high grade.Compared to the traditional geometric method and the ordinary Kriging method,the average grade and metal content in the estimation results of the indicator Kriging method are both higher;the indicator Kriging method is more suitable for metal deposits with poor grade distribution continuity and significant value of the extra high grade.
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