物探方法在青海哈日扎矿区找矿中的应用

The application of geophysical prospecting in Harizha mine area of Qinghai province

为确定哈日扎V矿带含矿破碎带的位置、展布方向、规模及矿体产状,通过应用激电中梯剖面测量、激电联合剖面测量方法,并结合区内地质矿产特性以及岩石物理性质确定了视极化率异常。测试表明:矿石的极化率平均为6.76%,电阻率平均为2 705Ω·m,呈现低阻高极化的特征;根据激电中梯剖面异常曲线圈定了一条长3.2 km的高极化带,视极化率最高值为8%;激电联合剖面曲线特征显示极化体向南倾斜,倾角较陡;钻孔验证时发现富集的矿石。两种物探方法的综合利用对该地区寻找受构造控制的热液脉型多金属矿产具有重要指导意义。

In order to determine the Harizha V ore belt, position of ore bearing fractured zone, direction ,scale and occurrence, the IP profile measurement and IP combined profile measurement,and combined with the characteristics of geology and mineral resources of the region and the rock physical properties were applied to determine the abnormal. The test showed that the average ore polarizability was 6. 76% with an average resistivity of 2 705 fi＇m,showing the characteristics of low resistance and high polarization. A 3. 2 k m belt with high polarizability was delineated based on the IP intermediate gradient profile, and the highest apparent polarization rate was 8 %. The characteristics of IP combined profile curve shows that the polarization is southward tilted with a steep angle. The rich mining ore was found during drilling verification. It shows that the comprehensive utilization of the two geophysical prospecting methods has important guiding significance in finding the hydrothermal vein type polymetallic ore.