摘要:
在呼中—塔河地区1 450 km2区域开展1∶50000水系沉积物测量,共采取水系沉积物样品9 576件,对样品的分析结果进行统计,结合该地区地质背景,对13种元素地球化学参数特征、元素含量概率分布特征、元素的相关性进行总结发现:Sb、Pb、Ag、As、Zn、Cu、W、Mo、Bi、Cr、Ni不同程度的发生了富集,可能形成矿床;Mo、Pb组合异常可作为寻找Mo的地球化学标志.以水系沉积物工作圈定的组合异常为基础,进行1∶10000土壤地球化学测量和地表工程揭露,在Mo异常浓集中心发现宽度为1.4 m,品味为0.014%的钼矿化体,说明该方法在呼中—塔河森林覆盖区具有良好的找矿应用价值.
Abstract:
Based on the 1 ∶ 50 000 stream sediment survey of an area of 1 450 km2 in Huzhong-Tahe area,the authors collected 9 576 samples.Through the analysis of the samples in combination with the regional geological setting,the authors summarized geochemicalparameters of 13 kinds of elements,the probability distribution of element values and the correlation of the elements.Sb,Pb,Ag,As,Zn,Cu,W,Mo,Bi,Cr and Ni are enriched in various degrees,so it is possible for them to form ore deposits.Combined Mo and Pb anomalies can be used as geochemical indicator for Mo.Based on the anomaly combination of stream sediment survey,the authors carried out 1 ∶ 10 000 soil geochemical exploration and conducted surface uncovering,which led to the discovery of a molybdenum orebody,which is 1.4 m in width,with Mo grade of 0.014% in the concentration center.This proves that the method has good application value for ore prospecting in Huzhong-Tahe forest coverage area.
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