THE APPLICATION OF FREQUENCY-DOMAIN INDUCED POLARIZATION METHOD IN THE HALASHAN LEAD-ZINC ORE FIELD IN TIBET
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摘要: 哈拉山铅锌矿床属高锌高氧化矿，矿区海拔高度4300 m以上.矿体赋存在断裂构造带内的次级构造破碎带中.区内岩性较为简单，矿体与围岩有一定的电性差异，通过频率域激电测量，圈定出低缓视幅频率（Fs）异常，经综合分析推测为s矿异常.经工程揭露，圈定出数条高氧化铅锌矿体.说明在一定的地质环境下，频率域激电法对寻找氧化矿有较明显的效果.Abstract: The Halashan lead-zinc deposit contains high-Zn ore with high oxidation. The altitude of the ore field is above 4300 m. The ore bodies are controlled by the secondary structures of the major fault belt. The rocks in the deposit are lithologically simple. The electrical features of the ore bodies are different from those of the wallrocks. By measurement of frequency-domain induced polarization method, small-amplitude low-gradient anomalies of frequency (Fs) are delineated. Analysis shows that they are anomalies related to mineralization. With geological projects, several highly oxidized Pb-Zn ore bodies are found. This method is therefore verified to be effective in searching such ore at similar situation.
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