磁激电方法技术试验研究

A TRIAL STUDY OF MAGNETIC INDUCED POLARIZATION

激电法是矿产勘查的主要方法技术,其中应用最多的是电激电法,但电激电法在接地条件困难区(倒石堆、沙漠、戈壁、永久冻土)难以发挥效果,为了发展不接地的磁激电技术,在对磁激电法的基本原理、方法技术、数据处理等方面进行研究的基础上,开展了磁激电法与电激电法的对比试验,并对试验结果进行了分析。

Magnetic Induced Polarization（ MIP） is one kind of electrical conductivity methods,which measures magnetic field point by point rather than measuring the electric field difference between two electrodes in Electric Induced Polarization （EIP）. Compared to EIP, MIP surveys have certain merits, such as ： bigger detection depth, higher resolution, capable to provide useful information through highly con- ductive overburden and high-resistance or low-resistance cover, no need for grounding, and etc. It will be a deep exploration technology and applied to areas such as low-resistance overburden,Gobi desert, bedrocks which have been a major impediment to EIP surveys. In order to test the ability of obtaining IP anomaly in MIP surveys,we carried out a trial comparative study between MIP and EIP（Time-domain IP method and multi-frequency phase IP method included） in a mining area in China. Test results show that there is a good consistency in the IP anomaly about the two detection methods measured in the same survey lines and it will provide a basis for the further studies of MIP. In the paper the basic principles,techniques, and data processing of this method（MIP） are discussed, and the results between Magnetic Induced Polarization and Electric Induced Polarization are analyzed.