基于证据权重法的辽东南芬-万宝地区多金属成矿远景区预测

南芬-万宝地区是辽东钼、铜、铅锌等多金属矿聚集地.在充分研究区内成矿规律的前提下，以MAPGIS软件为数据处理平台，提取区域地质、地球物理、地球化学等13个空间控矿因素作为证据因子；以划分网格单元的方式对成矿多元信息进行叠加整合，建立证据权重模型；以后验概率求拐点的方法圈定Ⅰ级远景区13处，Ⅱ级远景区10处，Ⅲ级远景区7处.预测结果表明，83%的矿床（点）位于成矿预测远景区内.除此之外，区内仍有3处Ⅰ级预测远景区内未见矿床（点），应作为今后找矿勘查的重点.

PREDICTION OF PERSPECTIVE DISTRICTS BASED ON EVIDENCE WEIGHT METHOD FOR THE POLYMETAL DEPOSITS IN NAFEN-WANBAO AREA,EASTERN LIAONING

Nanfen-wanbao area is the concentrated zone for the polymetal deposits of molybdenum,copper,lead-zinc,etc.in Eastern Liaoning Province.Based on the study of regional metallogenic regularity,with MAPGIS software for data processing platform,13 spatial ore-controlling factors,such as regional geology,geophysics and geochemistry,are extracted as evidence factors.The multiple metallogenic information is integrated by grid-setting to establish the evidence weighting model.By the way of posterior probability for inflexion,13 perspective areas of Grade I,10 of Grade II and 7 of Grave III are delineated.The result shows that 83% of deposits(occurrences) are located in the predicted perspective areas.It is worth noting that neither deposits nor occurrences have been found yet in 3 of the Grade I predicted perspective areas,which should be the key prospecting areas in the future.