基于GIS证据权重法的富蕴地区铜矿床成矿预测  

Metallogenic Prognosis of Copper Deposits Based on GIS Evidence Weight Method in Fuyun Area of Xinjiang

作　　者：妙超 

机构地区：[1]新疆大学地质与矿业工程学院,新疆乌鲁木齐830047

出　　处：《西部探矿工程》2013年第12期98-103,共6页West-China Exploration Engineering

基　　金：国家"十二.五"科技支撑计划项目(编号:2011BAB06B08)

摘　　要：在分析了新疆富蕴地区铜矿床成矿特征的基础上,建立区域铜矿找矿模型,提取各类找矿信息,在GIS中构成了与成矿有关的地层、断裂、侵入岩、重力和航磁5个证据层。对每个证据层各要素进行相关程度分析,以达到成矿有利信息的优选。用证据权重模型统计综合成专题证据层生成研究区成矿后验概率图。按照后验概率值的相对大小在预测区内圈定了12个成矿远景区。预测结果表明,86.6%的已知铜矿床(点)位于预测的成矿远景区内,说明预测结果可靠性较高。将其中的6个远景区作为重点勘查对象,有望实现重大找矿突破。Based on the analysis of metallogenic characteristics of copper deposits in Fuyun area, the paper established a regional cop- per deposit prospecting model and collected different prospecting information. Five evidence layers are formed according to mineral- ization, stratigraphy, fracture, intrusive rocks, gravimetric and aero- magnetic data in GIS. In order to optimize the favorable informa- tion, the correlations of each evidences layer are analyzed. From the evidence weight model statistics analysis, the thematic layers of evidence are integrated and the posterior probability map of the study area is compiled. Twelve prospecting areas are delineated in the forecast area according to the relative size of the posterior prob- ability value. Prediction result shows： 86.6% of the known copper deposits （points） are located in the forecast metallogenic prospect area, which means the prediction is reliable. The six prospect areas of them can be chosen as prior exploration objects to be a hopeful prospecting breakthrough.

关 键 词：GIS 铜矿 证据权重法 矿产预测 成矿远景区 

分 类 号：P208[天文地球—地图制图学与地理信息工程]