关键词: 钼多金属矿, 多元统计分析法, Euclidean距离法, 土壤地球化学测量, 聚类分析, 找矿靶区

Abstract: Sanguanmiao Mo-polymetallic deposit in Lushi County,Henan Province is lcoated in the south margin of the midwest of Lushi-Luanchuan marginal fold belt of of the south margin of North China Landmass,it is the favorable prospecting area of W,Mo,Pb,Zn,Au and Ag minerals.The Euclidean distance method after dimension standardization of multivariate statistic analysis method is adopted to study the prospecting prediction of Sanguanmiao mining area based on soil geochemical survey results,the Mo-Cu-Zn-Pb-W element correlation anomaly,As-Sb-Hg-Ag element correlation anomaly and Bi anomaly are divided based on the element combination,affinity-disaffinity relationship and genetic relationship by using cluster analysis method,so,the problem of the poor R-type cluster effect caused by poor element linear correlation in geochemical exploration work is solved effectively.The main metallogenic elements (Mo,Zn,Pb) and associate elements (Cu,W) are found by conducting comparison and analysis of the distribution characteristics of element correlation anomalies and single element anomaly.Based on the above analysis results,the prospecting target areas of the mining area are delineated based on the regional metallogenic geological background and the comprehensive anomaly characteristics of the mining area,the prospecting target areas are verified by using 1∶10 000 high-precise magnetic method,besides that,they are further verified by adopting pit method and drilling method.The study results show that:①both of I-type Sanguanmiao-Zhao′ao comprehensive Mo-Cu-Zn-Pb-W prospecting target area and Ⅱ-type Beinangou comprehensive Mo-Zn-Pb-W-Hg-As-Cu prospecting target area are belongs to mineralization anomalies,which is consistent to the cluster analysis results,they are the favorable prospecting areas in the mining area;②the Mo grade of I-type prospecting target area can not meet the requirement of industrial grade,while the Mo and TFe grade in Ⅱ-type prospecting target area reach to the industrial grade level (the maximum content of Mo is 0.28%,the maximum content of Fe is 46.1%),therefore,it is the favorable prospecting target area for the Mo-polymetallic deposit;③the metallogenic potential of medium-high temperature hydrothermal type Mo-polymetallic deposit and porphyry-skarn type Mo polymetallic deposit are huge in the mining area.

Key words: Mo-polymetallic deposit, Multiple statistical analysis method, Euclidean distance method, Soil geochemical survey, Cluster analysis, Prospecting target area