直升机航磁方法在大冶铁矿区深部找矿中的见矿实例  

AN ORE DISCOVERY EXAMPLE OF DEEP PROSPECTING BY HELICOPTER AEROMAGNETIC SURVEY IN THE DAYE IRON MINE

作　　者：于长春[1] 熊盛青[1] 刘士毅[2] 范正国[1] 眭素文[1] 

机构地区：[1]中国国土资源航空物探遥感中心,北京100083 [2]中国地质调查局发展研究中心,北京100037

出　　处：《物探与化探》2010年第4期435-439,共5页Geophysical and Geochemical Exploration

基　　金：863重大项目(2006AA06A208)资助

摘　　要：硬架式直升机航空磁测方法非常适用于局部重点地区找矿工作。该方法飞行高度在100 m左右、采样点距3 m左右,定位精度小于1 m,且在同等条件下,费用只有地磁的30%左右。采用现存矿体厚度图与航磁异常对比分析,及与正反演计算结果互相印证的方法,确定矿致异常,然后通过航磁异常精细反演确定钻孔位置。所布设的三个钻孔均在大冶铁矿深部见矿的结果证明了本方法的有效性。Aeromagnetic survey using helicopter with a fixed receiver is suitable for ore prospecting in local key areas,because the survey method has a low flying height of 100 m,a small sampling interval of about 3 m,a high locating precision of less than 1 m,and a low cost of about 30% of the expense of ground magnetic survey.In this paper,the ore-caused anomaly was determined by a comparative analysis of the ore body thickness and the aeromagnetic anomaly and a mutual verification of the forward and inversion calculations.The borehole site was determined by precise inversion of the aeromagnetic anomaly.The effectiveness of the method is verified by the fact that iron ore bodies were discovered in all the three borehole sites deployed by the authors at the depth of the Daye iron mine.

关 键 词：直升机 航磁测量 危机矿山 大冶铁矿 深部找矿 

分 类 号：P631.2[天文地球—地质矿产勘探]