The relative error formula of the Cagniard resistivity was calculated so as to know the influence of the the location of the antenna laid in CSAMT on the Cagniard resistivity, which was based on the wave zone of the electromagnetic fields in the homogeneous half-space ground caused by the horizontal electric dipole source. In the case of given parameter, three models of the antenna deviations, i.e., horizontal deviation, vertical deviation and comprehensive deviation, were built, and the characteristics of the influence of each model on Cagniard resistivity were discussed. The maximum relative errors of these models on Cagniard resistivity are 170%, 7% and 190% respectively. In addition, the influence of the antenna horizontal deviation of the antenna on Cagniard resistivity is more obvious than that of the vertical deviation.
杨建军, 钟仁. CSAMT中磁探头摆放位置对卡尼亚视电阻率的影响[J]. 物探与化探, 2013, 37(3): 521-523.
YANG Jian-jun, ZHONG Ren. THE INFLUENCE OF THE LOCATION OF THE ANTENNA LAID IN CSAMT ON CAGNIARD RESISTIVITY. Geophysical and Geochemical Exploration, 2013, 37(3): 521-523.
[1] Goldstein M A.Magnetotellurie experiments employing an artificial dipole source[M].Ph D thesis University of Toronto, Toronto,Ontario,Canada,1971.[2] 张国鸿,李仁和.可控源音频大地电磁法深部找矿实验效果[J].物探与化探,2010,34(1).[3] 詹少全,钱美平,冯戋戋.CSAMT全区视电阻率电场正演迭代拟合近场校正方法[J].物探与化探,2011,35(5).[4] 许广春.CSAMT法在实际应用中的若干问题[J].物探与化探,2011,35(6).[5] 石昆法.可控源音频大地电磁法理论与应用[M].北京:科学出版社,1999.