摘要:
内蒙古乌奴耳铅锌银矿地表覆盖严重,地质找矿标志不明显,在找矿过程中综合物化探方法对发现和圈定矿体起到了重要作用.化探测量发现矿区成矿元素为Pb、Zn、Ag,异常分布面积大, 组分复杂, 浓度分带明显,通过加密土壤测量异常查证,成矿元素异常强度提高了一个数量级;通过高精度磁法确定矿区分布在隐伏岩体的接触带上;矿化岩石具有高极化率(ηs≥3%)、中高电阻率(ρs=600~1 000 Ω·m)特性, 为本区的重要找矿标志.总结该矿床的地质、物化探特征, 提出对大兴安岭厚覆盖区的找矿方法, 取得了明显的找矿效果,为本地区的进一步找矿工作提供借鉴.
Abstract:
The Wunuer lead zinc silver deposit is located in Wunuer-Wuerqihan area of Xingan geosynclines, Inner Mongolia.The surface of the whole mining area is of vegetation, and the geological prospecting indicator is not obvious.In the process of ore prospecting, the integrated geophysical and geochemical methods played an important role in the delineation of orebodies.Geochemical survey shows that the ore-forming elements include Pb, Zn and Ag, the area is large, the components are complex, and the concentration zone is obvious.With high precision magnetic method, the authors detected that the mining area is distributed in a buried rock contact zone, and mineralized rocks have high polarization rate (ηs =3%) and high resistivity (ρs=600-1 000 Ω·m).All of the above data are important indicators for ore-prospecting.This paper summarizes the geological, geophysical and geochemical characteristics of the deposit, and puts forward the prospecting method in the Da Hinggan Mountains, which provides reference for further prospecting in this region.
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