频谱激电法在豫西某铅锌银矿区中的应用

The application of spectral induced polarization to a Pb-Zn-Ag deposit in western Henan Province

采用频谱激电(SIP)法对豫西某铅锌银矿区已发现的激电中梯异常进行了评价。利用V8多功能电法工作站9道轴向偶极—偶极装置采集数据,经过视谱反演后,根据从已知到未知的原则,总结了本区的物探找矿标识,确定了高充电率、中低阻梯度带、中等时间常数,低频率相关系数的视谱参数组合特征。根据地质矿产资料对具有"高—梯度带(中低阻)—中—低"组合特征的频谱激电异常进行了分类评价,并圈定了找矿靶区。根据圈定的找矿靶区进行了钻探验证,结果表明在定位的Ⅰ类异常靶区中寻找到较大规模的深部隐伏矿体,取得了较好的应用效果。

In this paper, the authors used the spectrum of IP method to evaluate the IP anomaly with central gradient array for a Pb?Zn?Ag deposit in western Henan Province. V8 multifunctional electrical workstation using the device of 9?channel axial dipole?dipole was employed to collect data. Based on the principle of " from the known to the unknown" , the authors summarized the geophysical prospec?ting indicators which have the combined characteristics of high charge rate, low resistance transition zone, medium time constant and low frequency correlation coefficient. According to the data of geology and mineral resources, the composite IP anomalies characterized by " high-gradient belt (low resistance)-medium-low" were classified and evaluated, and the prospecting target areas were deline?ated. According to the prospecting target areas, the drilling verification was arranged. The drilling results show that the positioning in the target area of classⅠanomalies led to the discovery of a large?sized concealed orebody in the depth, thus achieving good application effect.