分量化探方法在苗儿山张家铀矿床北部地区铀矿勘查中的应用

Application of the Partial Extraction Geochemical Prospecting Method for Uranium Exploration in the Northern Zhangjia Uranium Deposit,Miaoershan

张家铀矿床是苗儿山铀矿田北部的代表性铀矿床之一,区内断裂构造发育,岩浆活动频繁,具有良好的铀成矿地质条件。区域内矿床浅部工程揭露程度较高,可是对深部探索研究成果较少。以苗儿山地区的张家铀矿床为研究对象,利用分量化探手段,对分量元素采集处理、相关性分析、R型聚类、因子分析等,提取元素分量中的成矿相关信息和预测深部成矿潜力。研究表明,研究区U分量总体较高且异常明显,与区内断裂构造带的展布吻合较好,基本可以指示区内深部铀矿体的存在。区内As、Mo、Be分量元素与U分量异常吻合,线性相关系数分别为0.612、0.497、0.531,显示高度相关。结合R型聚类、因子分析,初步认为U、As、Mo、W、Be等分量异常组合可以作为该区指示深部铀矿的地球化学标志。该分量元素异常组合在区内具有较好的找矿指导意义,可以在此基础上进行钻探工程验证。

The Zhangjia uranium deposit is one of the representative uranium deposits in the northern Miaoershan uranium orefield.The fault structure is developed and magmatic activity is frequent in the area,which provide the favorable conditions of deep uranium mineralization.Although the shallow engineering of ore deposits is highly exposed,the research results of deep exploration are scarce.The partial extraction geochemical prospecting method was applied in the Zhangjia uranium deposit,Miaoershan area.The acquisition and processing,correlation analysis,R-type clustering,factor analysis and so on of the partial extraction elements are employed to fetch uranium mineralization-related information and predict the deep metallogenic potential.The results show that the U component is generally high and abnormal,which is consistent with the distribution of the fault structural belt in the area,basically demonstrating the existence of deep uranium ore bodies in the area.The As,Mo,Be and other partial extraction elements are in high agreement with the U component,whose correlation coefficients are 0.612,0.497,0.531 respectively,effectively indicating high correlation.Combine with the R-type clustering and factor analysis,the partial content anomaly combination of U,As,Mo,W,Be and so on can be considered as the deep prospecting indicators of uranium deposits.The combination of partial extraction elements display great guiding significance for the prospecting of deep uranium deposit.Moreover,the drilling engineering can been further verified to the reliability of this method.