中文摘要：

本文在总结分析前人对MT视电阻率研究的基础上，提出了一种新的MT视电阻率定义方法MT相对视电阻率，探讨了其在深部探测中的适用性．MT二维地电模型计算结果表明，TM模式相对视电阻率与Cagniard视电阻率类似，误差在容许范围内，其用于深部探测是可行的．南岭于都一赣县矿集区盘古山的MT实测资料验证了相对视电阻率在解决深部地质问题中的的可行性和有效性．MT相对视电阻率避开了低频磁场观测的复杂性，避免了低频磁场分量变化带来的畸变，为利用天然电场解决深部介质的电阻率分布奠定了基础．

英文摘要：

This paper on the basis of summary and analysis predecessors＇ s study of MT apparent resistivity, proposes a new MT apparent resistivity definition method-MT relative apparent resistivity and discusses its applicability in the deep detection. Tow-dimensional geoelectric model calculation results of MT show that TM mode relative apparent resistivity and Cagniard apparent resistivity is similar, the error is in the allowable range, it is feasible for deep detection. The MT data measured in PamGu mountain of Nan Ling Yu Du Gong Xian ore~eoncentrated areas verify the relative apparent resistivity＇s feasibility and effectiveness in solving deep geological problems. MT relative apparent resistivity avoids the complexity of low frequency magnetic field＇s observation and the distortion caused of low frequency magnetic field component change, lays the foundation of solving underground medium resistivity distribution by using natural electric field.