大地电磁测深法在深部矿产资源调查中的应用  

THE APPLICATION OF MAGNETOTELLURIC SOUNDING TO THE INVESTIGATION OF ORE RESOURCES AT DEPTH

作　　者：徐新学[1] 

机构地区：[1]天津华北地质勘查局华勘矿业公司,天津300170

出　　处：《物探与化探》2011年第1期17-19,23,共4页Geophysical and Geochemical Exploration

摘　　要：在临汾磁铁矿资源调查中,应用大地电磁测深法,结合已知钻孔标定、控矿环境分析以及反演断面电性等值线特征和目标层位的错动,圈定了1 400 m深度磁铁矿体的顶、底板界面和控矿断裂构造的位置。验证结果表明推断的顶、底板深度与实际深度误差分别为3.8%和0.5%,是频域电磁法在深部矿产资源勘查中应用于直接找矿比较成功的实例。表明探测深度大、对高导层(体)反映敏感的大地电磁测深法在深部及隐伏矿勘查中也是行之有效的。The magnetite resource investigation and drilling verification in Linfen shows that the magnetotelluric sounding method has the advantage of detecting deep high-conductivity layer,and hence is effective in prospecting for deep and concealed ore deposits.With a practical example,the authors revealed the relationship between borehole data and low resistance contour lines,and delineated the top and bottom interfaces of the ore body at the depth of 1 400 m as well as the position of the ore-controlling fault.The results show that the inferred depth is consistent with borehole data,with the errors for the top and the bottom being only 3.8% and 0.5%.This is a successful example in the application of the frequency-domain electromagnetic sounding method.

关 键 词：深部找矿 大地电磁测深法 磁铁矿 资料反演 

分 类 号：P631[天文地球—地质矿产勘探]