Application of GIS-Based Weights of Evidence Method for Metallogenic Prediction to Copper Resources in Western Region of Zhejiang, China

In western region of Zhejiang province, structure and magma activity occur frequently; Proterozoic eon and Paleozoic era of copper mineralization favorable layers are distributed in those regions; the NE orientation deep fractures develop and move; the Shengong period and early Yanshanian of magma activity closely relate to mineralization. There are well metallogenic conditions of Au, Ag and Cu minerals in the regions according to the long-term and complex geological evolution, tectonism and magmatic activity. Based on analysis of tectonism, stratum, rock, fractures and minerogenetic map in the region, the geological variables are obtained by the multi-source information of geological abnormity, minerogenetic abnormity using MAPGIS and MORPAS software. The study regions are divided into 1755 grid cells with 5km×5km. The five minerogenetic prospect regions of Cu deposits are obtained by weightsof evidence modeling, which show that weight of evidence method is a good tool for minerogenic prediction.