基于专家证据权重法的成矿远景区划与评价——以东昆仑地区金矿为例  

Delineation and Assessment of Deposit Prospect Based on Expert Weights of Evidence: An Example from Gold Deposits in Eastern Kunlun Mountain Area

作　　者：丁清峰[1] 孙丰月[1] 

机构地区：[1]吉林大学地球科学学院,长春130061

出　　处：《地质科技情报》2006年第1期41-46,共6页Geological Science and Technology Information

基　　金：中国地质调查局地质调查项目"新疆-青海东昆仑成矿带成矿规律和找矿方向综合研究"(200110200021);"东昆仑成矿带重大找矿疑难问题研究"(200310200012)

摘　　要：在介绍专家证据权重法的基础上,将东昆仑地区的基础地质、区域成矿规律及典型矿床研究等方面取得的认识(知识系统)与证据权重法结合,提出并建立了一个基于专家证据权重法的矿产资源定量预测评价系统,该系统在根据知识系统对各证据因子赋权重的过程中体现了地质专家的思想。应用专家证据权重法对东昆仑地区金矿的成矿概率进行了定量计算,并进行了金矿成矿远景区划。研究结果表明远景区内预测含矿单元的后验概率二重积分的大小可代表远景区的总体成矿潜力,据此将各远景区进行分级排队,由高到低划分为A、B、C 3级。The low and unbalanced research of eastern Kunlun Mountain and its different geotectnic setting make it difficult for statistic weights of Evidenced （WofE）to achieve good prospecting results in the area. Therefore we combined the knowledge system with WorE to propose and build a mineral resource quantitative prospecting and assessing system called that＂Expert Weights of Evidence＂. The knowledge system means knowledge from geology,regional metallogenetic laws and typical deposits study in the study area. The process of such expert system shows the expert thought of geologists, when specifying weight for evidential themes. Based on the detailed introduction of Expert WofE, eastern Kunlun Mountain is taken as an example to illustrate the delineation and assessment of gold prospect. Firstly,we use Expert Wore to calculate the metallogenic probabilities for gold in the area. Then we delineate the gold prospects in it. Finally, the double integral of posterior probability of the ore-bearing units in each prospect is supposed to stand by the total metallegenic potential in it. Therefore,we classified every prospect by A,B,and C.

关 键 词：东昆仑 专家证据权重法 成矿远景区划评价 

分 类 号：P624.6[天文地球—地质矿产勘探]