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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实测资料验证了相时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.
In this paper, based on the previous studies on MT apparent resistivity, a new MT apparent resistivity method-MT relative apparent resistivity is proposed, and its applicability in deep exploration is discussed. The results of electric model show that the relative apparent resistivity of TM mode is similar to that of Cagniard apparent resistivity and the error is within the allowable range, which is feasible for deep exploration. And verified the feasibility and effectiveness of phase-time apparent resistivity in solving deep geological problems.MT relative apparent resistivity avoids the complexity of low-frequency magnetic field observation and avoids the distortion caused by the changes of low frequency magnetic field components. In order to utilize natural Electric field to solve the distribution of resistivity in deep lays the foundation.