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Chapter 1 Principles of Dual Frequency Induced Polarization Method 1.1 Introduction 1.2 Physical and Chemical Interpretation of IP Phenomenon 1.3 IP Characteristics of Various Ores and Rocks 1.4 Frequency Characteristics and Measurements of Induced Polarization 1.5 IP Characteristics of Rocks(Ores) in Frequency Domain & Affecting Factors Chapter 2 Equivalence Principles and Parameters in Induced Polarization Measurements 2.1 Macroscopic Approaches for Studying IP and LTI System 2.2 Equivalence Principles of Induced Polarization 2.3 Measuring Parameters in Frequency Domain IP Methods Chapter 3 Measurement Methods and Characteristics of DFIP 3.1 Measuring Plan of DFIP 3.2 Waveforms of Dual Frequency Currents 3.3 Anomaly in DFIP 3.4 Anti-Interference Ability of DFIP 3.5 Characteristics of DFIP Chapter 4 DFIP Instrumentation 4.1 Parameters and Performance Characteristics of DFIP Instruments 4.2 Work Principles of SQ-3C Portable IP Instrument 4.3 The Structure of DFIP Instruments 4.4 Maintenance and Service Chapter 5 Removal and Utilization of Electromagnetic Induction Coupling in IP Measurements 5.1 Classification of EM Induction Couplings 5.2 Capacitance Coupling and Its Representation in IP Measurements 5.3 EM Coupling and Its Time Characteristics in IP Measurements 5.4 Principles of Wave-chop Decoupling and Selection of Wave-chop Width 5.5 Wave Chopping Effects on DF Wave Distortion and EM Decoupling 5.6 Direct, Simultaneous and Respective Extractions of IP and EM Effects Chapter 6 Special Performance of Nonlinear Effect in Dual Frequency Spectrum Induced Polarization 6.1 Electrochemical Mechanism of Nonlinear Effect of IP Effect 6.2 Equivalent Circuit at Interface Between Mineral and Solution 6.3 Overpotential Response of Equivalent Circuit 6.4 Theoretical Calculations and Model Experimental Results of IP Frequency Spectrum Curves of Cathode and Anode 6.5 Nonlinear Effect of DFIP Frequency Spectrum Chapter 7 Spatial Distribution Characteristics of DFIP Anomaly 7.1 Surface Polarization Field of a Buried Sphere in a Homogeneous Alternating Current Field 7.2 IP Anomaly of a Sphere with Impregnated Spherical Shell in a Homogeneous Electric Field 7.3 Vein Ore Body in a Homogeneous Alternating Electric Field 7.4 A Surface-Polarized Spherical Body in a Point-Source Field 7.5 IP Field of a Surface Polarized Infinitely Long Cylinder 7.6 Experimental Dipole Profiling Curves of Several IP Bodies with Regular Shapes 7.7 Comparison of Several Profiling Arrays 7.8 Anomaly Characteristics of IP Sounding Chapter 8 Field Working 8.1 Electrode Arrays 8.2 Selection of Frequency Pairs 8.3 Power Supply System 8.4 Measurement Circuit 8.5 Electrode Effects and EM Couplings in IP Measurements 8.6 Interference in IP Measurement and Its Elimination