PREDICTION OF PERSPECTIVE DISTRICTS BASED ON EVIDENCE WEIGHT METHOD FOR THE POLYMETAL DEPOSITS IN NAFEN-WANBAO AREA, EASTERN LIAONING
ZHAI Fu-rong1, YANG Zhan-xing1,2, ZHANG Guo-ren3, LIANG Shuai1
1. Liaoning Technical University, Fuxin 123000, Liaoning Province, China; 2. Liaoning Bureau of Geological and Mineral Exploration, Shenyang 110032, China; 3. Liaoning Institute of Geological Exploration, Dalian 116100, Liaoning Province, China
Abstract：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.
2011, Vol. 20 
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