## The Geoelectrical Methods in Geophysical ExplorationHardbound. This volume deals with electrical methods as used in applied geophysics. There are 14 chapters. The first four chapters comprise a handbook of information needed in applied electrical geophysics. The next three chapters deal with three standard techniques: Direct Current (DC), Magnetotelluric (MT) and Controlled-Source Electromagnetic (EM) methods. Chapters 8 - 11 develop important aspects of the subject which are common to all three standard techniques. These common aspects include ambiguity and insensitivity, data acquisition, modeling and simulation, and interpretation. Chapters 12 and 13 cover experience with electrical methods in the solution of a wide variety of practical problems. |

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### Contents

ELECTRICAL METHODS IN GEOPHYSICS | 1 |

GENERAL CONCEPTS OF ELECTROMAGNETIC HELD | 29 |

PROPERTIES OF ROCKS AND MINERALS | 79 |

Copyright | |

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### Common terms and phrases

amplitude apparent resistivity axis behavior coil computed conductive zone conductor consider coordinates coth current density current dipole current flow defined depth determined dielectric dipole source direct current distance earth correction factor effect electric field electric sounding electrical conductivity electrical methods electromagnetic field electromagnetic induction electromagnetic sounding error exploration expression field components Frechet derivative frequency function geoelectric structure Geophysics halfspace Hankel transform horizontal impedance induced polarization induction integral interpretation inverse ionosphere kilometers layered earth correction linear located loop magnetic field magnetic permeability magnetotelluric magnetotelluric sounding Maxwell's equations measured medium meters minerals normal observed obtained ohm-meters parameters permafrost permittivity perturbation phase plane potential problem ratio region rock Schlumberger sheet shown in Fig signal solution sounding curve space spectrum sphere SUBROUTINE Substituting eq survey TDEM thickness transform transmitter uniform earth values vector vertical component voltage wave number zero