关键词: 成矿预测, 预测评价, 地质建模, 信息量, 红旗沟—深水潭, 东昆仑成矿带

Abstract:

Hongqigou-Shenshuitan gold deposit belongs to a kind of tectonic altered rock type gold deposits in the eastern Kunlun metallogenic belt, and the orebodies are controlled by the fracture zone within mine district. Through an integrated analysis of geological setting and gold mineralization, the 3D digital mine is modeled. We have extracted the favorable range of controlling factors and constructed prospecting prediction model with the spatial analysis of GIS, and the prospecting information content method was used to synthesis metallogenic prediction. Moreover, from the three aspects of the optimal classification analysis, the accuracy analysis and the result analysis, we have done the research on the following aspects: the information content grading evaluation, the prospecting area grading evaluation, the data accuracy evaluation, validity evaluation on the prospecting prediction model and the positioning precision evaluation of the prospecting target area, and estimate of resource reserves and prospecting probabilistic assessment.In this study, 4 prospecting targets have already preliminarily delineated, and the estimated gold reserves are about 165 tons in this area. The study results show that the Hongqigou-Shenshuitan gold deposit has considerable prospecting potential and attention should be paid to the deep area and the border area of the known orebodies in the study area.

Key words: metallogenic prediction, prediction evaluation, geological modeling, information content, Hongqigou-Shenshuitan, eastern Kunlun metallogenic belt