基于GIS和证据权重法的那仁宝力格地区铜多金属矿成矿预测

根据那仁宝力格地区主要铜多金属矿床成矿规律，利用GIS平台提取地、物、化、遥等多元地质找矿信息，在MRAS系统中开展了基于18个成、控矿要素的铜多金属矿成矿预测与评价。根据后验概率值大小编制了成矿后验概率等值线图，划分了4个等级的找矿条件和9个找矿远景区。结果表明，预测模型有效，近95%的已知矿床（点）位于D级及以上找矿有利地区。在众多成、控矿要素中，增隆昌组与阿古鲁沟组、构造信息、遥感组合异常、铁族元素地球化学组合异常等具有较大权重。新圈定的那仁宝力格找矿远景区和霍各乞南部找矿远景区是下一步研究区寻找新的铜多金属矿床的重点地区。

Metallogenic Prognosis of Copper Polymetallic Mineral Resources in Narenbaolige Area on Basis of Weights of Evidence Method and GIS

On the basis of metallogenic regularities of copper polymetallic deposits in Narenbaolige area and adjacent region, multivariate geological prospecting information is extracted by GIS software, including geological, geophysiccal，geochemical and remote sensing data. These data were divided into 18 mineralized variations. Weight of evidence modeling is applied to map copper polymetallic potential areas based on MRAS software in this study area. Four grades metallogenic condition and nine mineralization vision zones were delineated based on the posterior probability map. The result indicated that the model is efficient，and up to 95% deposits are located in the area which was equal or better than Grade-D favorable prospecting area. Among the ore-forming and ore-controlling factors, strata of Zenglongchang Group and Agulugou Formation, liner structure, combination RS alteration and combination geochemical anomalies of iron group elements have greater weight than other factors. Narenbalige mineralization vision zones and South Huogeqi mineralization vision zone have good prospects for finding undiscovered Cu, Pb, Zn and Fe mineral resources.