综合物探方法在五横铜多金属矿区中的运用

Application of comprehensive geophysical prospecting method in wuheng copper polymetallic mining area

近年来,在五横地区周边接连发现具有一定规模的铁铜多金属矿床,本区属庐枞火山盆地的南缘,是长江中下游重要的矿集区之一。本次首先通过高精度磁测扫面工作,圈定查区磁异常范围确定主要岩体的空间分布及控矿构造带方向;再利用激发极化法圈定高极化率异常体范围,并结合可控源音频大地电磁测深法及磁异常分布特征初步建立了找矿模型:低阻高极化高磁化率模型、高阻高极化高磁化率模型。低阻高极化高磁化率异常模型是查区主要的找矿模式。

In recent years,iron copper polymetallic deposits with a certain scale have been successively found around wuheng area.This area belongs to the southern margin of Luzong volcanic basin and is one of the important ore concentration areas in the middle and lower reaches of the Yangtze River.Firstly,through high-precision magnetic survey and surface scanning,the magnetic anomaly range in the survey area is delineated,and the spatial distribution of main rock masses and the direction of ore controlling structural belt are determined;Then,the induced polarization method is used to delineate the range of high polarization anomaly body,and combined with controllable source audio frequency magnetotelluric sounding method and the distribution characteristics of magnetic anomaly,the prospecting models are preliminarily established:low resistance,high polarization and high susceptibility model,high resistance,high polarization and high susceptibility model.The anomaly model of low resistance,high polarization and high magnetic susceptibility is the main prospecting model in the survey area.