基于证据权法的伊尔岗地块金矿成矿预测  

Prognosis of gold deposits in Yilgarn block based on weights of evidence

作　　者：陈刚[1] 姚仲友[1] 刘君安[1] 高卫华[1] 王天刚[1] 

机构地区：[1]中国地质调查局南京地质调查中心,江苏南京210016

出　　处：《地质通报》2014年第2期210-214,共5页Geological Bulletin of China

基　　金：中央地勘基金项目(编号:201130D06200123)

摘　　要：在分析澳大利亚伊尔岗地块金矿床成矿特征的基础上,建立了区域金矿找矿模型,提取各类找矿信息,在GIS中构成了与成矿有关的容矿岩石、构造、岩浆岩、物探、化探异常等6个证据图层。用证据权法统计综合证据图层生成研究区成矿后验概率图。按照后验概率的相对大小划分出3级成矿远景区,共圈定3个Ⅰ级成矿远景区,为澳大利亚的金矿预测提供了有效方法。Based on an analysis of metallogenic characteristics of gold deposits in Yilgarn block, the authors built a gold prospecting model. Various kinds of geological anomalous information of the area was analyzed, and six evidence layers related to mineralization, i. e., strata, structures, magmatites, remote sensing anomalies, geophysical anomalies and geochemical anomalies, were extracted. The weight evidence method was applied to simulate the mine evaluation of the study area. Based on the posteriori probabilities, the authors determined third-grade prospective subareas and delineated three first-grade metallogenic targets. The results obtained by the authors provide effective means for prognosis of gold deposits in Australia.

关 键 词：伊尔岗地块 GIS 证据权重法 金矿成矿远景预测 

分 类 号：P618.51[天文地球—矿床学]