激电中梯和激电测深在吉林和龙市石马洞钼矿的应用

Application of IP intermediate gradient and sounding of induced polarization Shimadong molybdenum mine in Helong City,Jilin Province

为了在吉林东部覆盖较厚地区寻找深部隐伏矿体,在和龙市石马洞钼矿勘查中利用中间梯度装置激发极化法扫面,发现了极化率为2.00%～5.18%、电阻率≤2 000Ω.m的高极化率低阻异常。异常体上对称四极装置激电测深结果表明:11勘查线极化体顶面埋深15～30 m,底面埋深>500 m;经钻探工程验证,钼矿体的形态、产状、顶、底板的埋深与异常解译成果基本吻合。说明在硫化物矿床的勘查中利用中梯装置扫面可以快速地发现和圈定激电异常,利用激电测深可以了解极化体的埋深及空间赋存状态,为指导工程验证提供充分的依据。

In order to search for deep concealed ore bodies in the eastern part of Jilin Province,explored Shimadong molybdenum mine of Helong City,Jilin Province by IP intermediate gradient and sounding of Induced polarization method and found that the high polarization and low resistance anomaly of.polarization rate of 2.00% 5.18% resistivity of ≤ 2 000 Ω.m Abnormal body symmetry quadrupole induced polarization sounding device results showed that： 11 exploration depth of the top surface of the body linearly polarized 15 ～ 30 m,bottom depth 500 m;verified by the drilling works,molybdenum ore body shape,occurrence,top and bottom of the depth of interpretation of the results are basically consistent with the anomaly.The results show that the method can quickly identify and delineate IP anomaly,understand the depth of polarization and spatial occurrence and provide adequate guidance to engineering verification basis.