地电化学方法在浙江江山——长台地区寻找隐伏铀矿的应用

Application of geo-electro-chemical methods in searching hidden uranium deposits in Jiangshan-Changtai area of Zhejiang

为进一步了解地电化学集成技术寻找隐伏铀矿的成效,探寻浙江江山—长台地区隐伏铀矿找矿技术指标,解决类似区域深部找矿问题,在该地区开展以地电提取测量法为主,以土壤离子电导率、土壤热释汞测量法为辅的找矿预测研究。对地电提取U、Th、Pb、Zn、Cu、Ag、Mo、V、W共9种元素进行R型聚类分析、R型因子分析显示,Th、Pb、Zn、Mo、Ag与主成矿元素U关系最为密切,可以作为寻找类似隐伏铀矿的参考指标。地电化学异常分布特征揭示,断裂构造以及接触带为该区重要的控矿因素。根据地电提取单元素异常平面特征、因子得分异常展布情况,综合土壤离子电导率、土壤热释汞异常平面分布特征,结合研究区地质条件,在其范围内圈划出7处找矿远景区。

In order to further understand the effect of using geo-electro-chemical integration technology on finding concealed uranium deposits, to find the prospecting technical indicators of hidden uranium deposits in Changtai-Jiangshan area of Zhejiang,to solve the problems in similar deep prospecting areas,the authors carried out the research on ore prospecting based on geo-electro-chemical extraction method,aided by soil ion conductivity and soil heat-release mercury（ Hg）. Through the R-type cluster analysis and R-type factor analysis based on the extracting of nine elements such as U,Th,Pb,Zn,Cu,Ag,Mo,V and W by geo-electric method,the results indicate that Th,Pb,Zn,Mo and Ag are most closely related to main ore-forming element U,which can be used as reference index for finding similar concealed uranium deposits. The distribution characteristics of geo-electro-chemical anomalies reveal that the fault structure and contact zone are mainly ore-controlling factors in this area. According to geo-electro-chemical extraction of single element anomalies plane characteristics,abnormal distribution of factor score,synthesize soil ion conductivity,abnormal spatial distribution characteristics of soil heat-release mercury,combined with the geology conditions in study area,the authors delineate seven ore prospective areas in the research area.