The application of the induced polarization method to the replacement resources exploration of the Dongxi gold deposit
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摘要: 东溪金矿是北淮阳构造带东段最早被发现、最早被开采的金矿,因矿石缺乏硫化物,激电测量是否有效曾有争议.通过电阻率测量,辅以极化率测量,发现这些常用的物探技术在贫硫化物的东溪-南关岭金矿接替资源勘查中有效,视电阻率异常指示含金石英(碳酸盐)脉,视极化率异常可能暗示与成矿有关的脉岩及断裂构造.激电测量为探求控矿构造,尤其为实施钻探工程提供了强有力证据.Abstract: The Dongxi gold deposit is the first primary gold deposit discovered in the eastern part of northern Huaiyang tectonic belt,and it is also the first gold deposit for industrial mining.There exists controversy concerning the problem whether the induced polarization measurement could be an effective method or not under the condition of the lack of sulfides in the ore.According to the analysis of apparent resistivity and apparent polarizability measurement,the authors found that the commonly used geophysical exploration technique is effective for the replacement resources exploration in the Dongxi gold deposit with low sulfide content.The apparent resistivity anomaly indicates the auriferous quartz (carbonate) veins,and the apparent polarization anomaly might indicate dikes and fault structures related to the mineralization.The induced polarization measurement provides strong evidence for exploration of ore-controlling structure and drilling engineering implementation.
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