河南卢氏三官庙钼多金属矿区土壤地球化学特征及成矿预测

河南省卢氏县三官庙钼多金属矿区位于华北陆块南缘卢氏-栾川陆缘褶断带中西部，为寻找钼钨铅锌金银多金属矿的有利地区。采用多元统计分析方法中的经过去量纲标准化的Euclidean距离法对三官庙矿区进行了土壤地球化学找矿预测研究，采用聚类分析方法按相关元素组合、亲疏关系、成因联系将元素异常组合分为Mo-Cu-Zn-Pb-W元素相关性异常、As-Sb-Hg-Ag元素相关性异常和Bi异常，有效解决了化探工作中因元素线性相关性不佳而导致R型聚类效果不理想的问题。将元素相关性异常和单元素异常的分布特征进行比较，找出了主成矿元素Mo、Zn、Pb和伴生元素Cu、W。在此基础上，结合区域成矿背景和矿区综合异常特征对矿区进行了成矿预测，并圈定了找矿靶区，分别采用了1∶1万高精度磁法扫面、槽探法以及钻探法对找矿靶区进行了验证和工程揭露。研究表明：①圈定的I类三官庙-赵凹综合异常Mo-Cu-Zn-Pb-W找矿靶区、Ⅱ类北南沟综合异常Mo-Zn-Pb-W-Hg-As-Cu找矿靶区均为矿致异常，与元素聚类分析结果一致，均为寻找钼多金属矿较有利的地区；②I类找矿靶区Mo品位未达到工业品位，Ⅱ类找矿靶区Mo、TFe品位均达到了矿床工业品位（w(Mo)最大为0.28%，w(TFe)最大为46.1%），为寻找钼多金属矿的有利靶区；③矿区内形成中-高温热液和斑岩-矽卡岩型钼多金属矿床的潜力较大。

Soil Geochemical Characteristics and Metallogenic Prediction of Sanguanmiao Mo-polymetallid Mning Area in Lushi County,Henan Province

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.