证据权重法在中天山沙垄地区金矿成矿预测的应用  

Application of evidence weight method to the gold metallogenic prediction in west Shalong of middle Tianshan

作　　者：李强[1] 邹志友 王昱凯 LI Qiang;ZOU Zhi-you;WANG Yi-kai(School of Geosciences,Yangtze University,Wuhan 430100,China)

机构地区：[1]长江大学地球科学学院,武汉430100

出　　处：《桂林理工大学学报》2018年第3期401-409,共9页Journal of Guilin University of Technology

基　　金：中国地质调查局项目(1212011120484)

摘　　要：证据权重法是一种重要的矿产资源预测方法,利用对矿产相关的地质信息的叠加分析达到对研究区的预测。在充分收集和分析中天山沙垄以西地区地质资料的基础上,结合区内矿点分布和典型矿床特征,选取地层、岩浆岩、构造、遥感和化探异常作为多元成矿证据因子,利用证据权重法对研究区金矿进行了找矿远景预测。研究共建立了18个有效证据层,以0. 08、0. 22和0. 4为后验概率边界值划分了三级成矿远景区,圈定A类远景区13个、B类远景区34个、C类远景区45个,远景区面积占比9. 26%。Evidence weighting is a kind of important mineral resources prediction method,which adopts overlay analysis about geological mineral information to predict the potential metallogenetic area on the basis of comprehensive collecting and analyzing the geological data of the west Shalong of the Tianshan Mountains.Combining the distribution of ore deposits and the characteristics of typical deposits in the area,the strata,magmatic rocks,tectonic,remote sensing and geochemical anomalies were selected as multi-metallogenic evidence factors.The evidence weighting method was used to predict the prospects of the gold deposits.A total of 18 valid evidence layers were established.Three levels of metallogenic prospects are divided by 0.08,0.22 and 0.4 as posterior probability boundary values.There are 13 target areas of Class A prospects,34 for Class B prospects,and 45 for Class C prospects.The area of the prospects is 9.26%.

关 键 词：金矿 成矿预测 证据权重法 中天山 

分 类 号：P618.51[天文地球—矿床学] P628[天文地球—地质学]