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.
出处
《西部探矿工程》
CAS
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)
关键词
GIS
铜矿
证据权重法
矿产预测
成矿远景区
GIS
copper deposit
evidence weight method
miner- al prediction
prospecting areas
