综合物探方法在白水源测区找矿中的应用

Application of complex geophysical prospecting in Baishuiyuan survey area

为查明测区内的断裂及与岩体接触部位矽卡岩型矿体的分布情况,对白水源测区开展了高精度磁测和激电中梯扫面工作。受测区地层黄铁矿化及岩浆活动影响,岩矿石物性特征趋近,物探异常特征相近,异常解释存在多解性,导致矿化富集部位不能圈定。通过对磁测数据进行向上、向下延拓处理,区分深、浅部的磁异常特征。结合激电异常作出解释推断和综合评价,从而确定测区矿化体分布的范围和空间特征,推测有利的成矿地段,为地质勘查工程部署提供可验证靶区。

To find out the distribution of the fractures and skarn orebodies at the rock-mass-contacting site in Baishuiyuan survey area,the authors conducted high accuracy magnetic survey and IP intermediate gradient scanning in the area.Affected by the stratum pyritization and magmation in this area,the physical characteristics of rock ore are similar to each other,and the characteristics of geophysical anomalies are almost the same.The anomalies can be interpreted in many ways,thus the mineralization enrichment locations can hardly be blocked out.According to the upward and downward continuations of the magnetic survey data,magnetic anomaly characteristics at lower part and deep part of the survey areas were differentiated.Interpretation inference and comprehensive evaluation were made based on the IP anomalies,in order to determine the distribution scope and spatial characteristics of mineralization body in survey area.The authors inferred the favorable mineralization section,which could provide a verifiable target area for geological exploration project deployment.