关键词: 铀矿, 地电化学, 多元统计, 找矿预测

Abstract: Lujing area is one of the important granite-type uranium deposits in China.To expand the reserves of resources in China and deepen the prospecting depth of uranium deposits,geo-electrochemical method is used to predict the prospecting in this area.Based on the principle of “ from known to unknown ”,the feasibility experiment of the known profile was carried out in the Shulouqiu Uranium Deposit in the south of the study area,and it was found that a clear geoelectric extraction anomaly appeared above the distribution range of the known ore body.The anomaly corresponds to the ore body with a high degree,and the ore indication is good,indicating that the geo-electrochemical method is feasible and effective in finding concealed uranium deposits in Lujing area.Through the geoelectric extraction measurement in the unknown area in Lujing area,based on the measurement data,the content of 12 elements (As,Co,Cu,Mo,Ni,Pb,Sb,Th,Ti,U,V,Zn) was counted and the enrichment and dispersion degree were analyzed by using the element variation coefficient diagram.The results show that the U element in the study area has good metallogenic potential.Through cluster analysis and factor analysis,the 12 elements were divided into three groups:F1 (Co-Ni-Cu-Pb-Zn-V-Ti),F2 (U-Th-Pb-V) and F3 (Mo-As-Sb).It is also found that the abnormal distribution of w(U)/w(Th)>1/3 value has an important reference value for finding uranium deposits.According to the abnormal matching of element combination and the abnormal plane distribution characteristics of U single element and w(U)/w(Th) value,combined with orecontrolling and metallogenic geological conditions and metallogenic potential,three prospecting targets are delineated so as to provide reference for the further prespecting work.

Key words: uranium deposit,geo-electrochemistry,multivariate statistics,prospecting prediction