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Electromagnetic Sounding of the Earth's Interior - 1st Edition - ISBN: 9780444529381, 9780080466866

Electromagnetic Sounding of the Earth's Interior, Volume 40

1st Edition

Author: Viacheslav Spichak
Editor: Viacheslav Spichak
Hardcover ISBN: 9780444529381
eBook ISBN: 9780080466866
Imprint: Elsevier Science
Published Date: 14th November 2006
Page Count: 404
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Table of Contents

Preface

Part 1 EM sounding methods

  1. Global 3-D EM induction in the solid Earth and the oceans (A. Kuvshinov) 1.1. Forward problem formulation

    1. Basic 3-D Earth conductivity model
    1. Ocean effect in Sq variations
    1. Ocean effect of geomagnetic storms
    1. Magnetic fields due to ocean tides
    1. Magnetic fields due to ocean circulation
    1. Mapping conductivity anomalies in the Earth's mantle from space
    1. Conclusions
  2. Magnetovariational method in deep geoelectrics (M. Berdichevsky, V. Dmitriev, N. Golubtsova, N. Mershchikova, and P. Pushkarev)

    1. Introduction
    1. On integrated interpretation of MV and MT data
    1. Model experiments
    1. MV-MT study of the cascadian subduction zone (EMSLAB experiment)
  3. Shallow investigations by TEM-FAST technique: methodology and examples (P. Barsukov, E. Fainberg, E. Khabensky)

    1. Introduction
    1. Advantages of TEM in shallow depth studies
    1. On the TEM-FAST technology
    1. Transformation of E(t) data into ¡(h)
    1. One-dimensional inversion and TEM-FAST's resolution
    1. Joint inversion of TEM and DC soundings
    1. Side effects in TEM sounding
  4. 7.1. Superparamagnetic effect in TEM

  5. 7.2. Effect of induced polarization

  6. 7.3. Antenna polarization effect (APE)

  7. Seismoelectric methods of Earth study (B. Svetov)

    1. Seismoelectric effect (SE) of the first kind
    1. Seismoelectric effect of the second kind: historical outline and elements of theory
    1. Physical interpretation of seismoelectric phenomena
    1. Modeling of seismoelectric fields
    1. Laboratory studies of seismoelectric effects on rock samples
    1. Experimental field and borehole seismoelectric studies

Part 2 Forward modeling and inversion techniques 5. 3-D EM forward modeling using balance technique (V. Spichak) 5.1. Modern approaches to the forward problem solution 5.1.1. Methods of integral equations 5.1.2. Methods of differential equations 5.1.3. Mixed approaches 5.1.4. Analog (physical) modeling approaches 5.2. Balance method of EM fields computation in models with arbitrary conductivity distribution 5.2.1. Statement of the problem 5.2.2. Calculation of the electric field 5.2.3. Calculation of the magnetic field 5.2.4. Controlling the accuracy of the results 5.3. Method of the EM field computation in axially symmetric media 5.3.1. Problem statement 5.3.2. Basic equations 5.3.3. Boundary conditions 5.3.4. Discrete equations and their numerical solution 5.3.5. Code testing

  1. 3-D EM forward modeling using integral equations (D. Avdeev)

    1. Introduction
    1. Volume integral equation method
  2. 2.1. Traditional IE method

  3. 2.2. Modified iterative dissipative method

    1. Model examples
  4. 3.1. Induction logging problem

  5. 3.2. Airborne EM example

    1. Conclusion
  6. Inverse problems in modern magnetotellurics (V. Dmitriev, M. Berdichevsky)

    1. Three features of multi-dimensional inverse problem
  7. 1.1. Normal background

  8. 1.2. On detailness of multi-dimensional inversion

  9. 1.3. On redundancy of observation data

    1. Three questions of Hadamard
  10. 2.1. On the existence of a solution to the inverse problem

  11. 2.2. On the uniqueness of the solution to the inverse problem

  12. 2.3. On the instability of the inverse problem

    1. Magnetotelluric and magnetovariational inversions in the light of Tikhonov's theory of ill-posed problems
  13. 3.1. Conditionally well-posed formulation of inverse problem

  14. 3.2. Optimization method

  15. 3.3. Regularization method

  16. Joint robust inversion of magnetotelluric and magnetovariational data (Iv.M. Varentsov)

    1. Adaptive parametrization of a geoelectric model
  17. 1.1. A background structure and windows to scan anomalies

  18. 1.2. A priori model structure and constrains

  19. 1.3. Window with correlated resistivities of inversion cells

  20. 1.4. Window with finite functions

    1. Inverted and modelling data
    1. Inversion as a minimization problem
  21. 3.1. Minimizing functional

  22. 3.2. Robust misfit metric

  23. 3.3. Cycles of Tikhonov's minimization

  24. 3.4. Newtonian minimization techniques

  25. 3.5. Solution of linear newtonian system and choice of scalar newtonian step

  26. 3.6. Multi-level adaptive stabilization

  27. 3.7. Post-inversion analysis

    1. Study of inversion algorithms using synthetic data sets
  28. 4.1. Comparison of three model parameterization schemes in 2-D inversion

  29. 4.2. 2-D inversion with numerous finite functions

  30. 4.3. 3-D inversion example

  31. 4.4. Resolution of a system of local conductors using the CR-parameterization

  32. 4.5. Reduction of strong data noise and static shift

    1. Conclusions
  33. Artificial neural network inversion of EM data (V. Spichak) 9.1. Backpropagation technique

    1. Creation of teaching and testing data pools
    1. Effect of the EM data transformations on the quality of the parameters' recognition
  34. 3.1. Types of the activation function at hidden and output layers

  35. 3.2. Number of the neurons in a hidden layer

  36. 3.3. Effect of an extra hidden layer

  37. 3.4. Threshold level

    1. Effect of the input data type
    1. Effect of the volume and structure of the training data pool
    2. 5.1. Effect of size
    3. 5.2. Effect of structure
    1. Extrapolation ability of ANN
    1. Noise treatment
    1. Case history: ANN reconstruction of the Minou fault parameters
  38. 8.1. Geological and geophysical setting

  39. 8.2. CSAMT data acquisition and processing

  40. 8.3. 3-D imaging Minou fault zone using 1-D and 2-D inversion

  41. 8.4. ANN reconstruction of the Minou geoelectrical structure

  42. 8.5. Discussion and conclusions

Part 3 Data processing, analysis and interpretation
10. Arrays of simultaneous electromagnetic soundings: design, data processing and analysis (Iv. M. Varentsov) 10.1. Simultaneous systems for natural EM fields observation 10.2 Multi-site schemes for estimation of transfer operators 10.3. Temporal stability of transfer operators 10.4. Methods for the analysis and interpretation of simultaneous EM data 10.5. Conclusions 11. Magnetotelluric field transformations and their application in interpretation (V. Spichak)

11.1. Linear relations between MT field components 11.2. Point transforms of MT data 11.2.1. Impedance transforms 11.2.2 Apparent resistivity type transforms 11.2.3. Induction and perturbation vectors 11.3. Examples of the use of MT field point transforms for the interpretation 11.3.1. Dimensionality indicators 11.3.2. Local and regional anomalies 11.3.3. Constructing resistivity images in the absence of prior information 11.4. Integral transforms 11.4.1. Division of the MT field into parts 11.4.2. Transformation of the field components into each other 11.4.3. Synthesis of synchronous MT field from impedances and induction vectors

  1. Modeling of magnetotelluric fields in 3-D media (V. Spichak)

    1. A feasibility study of MT method application in hydrocarbon exploration
  2. 1.1. Statement of the problem

  3. 1.2. Numerical modeling

    1. Testing hypotheses of the geoelectric structure of the Transcaucasian region from magnetotelluric data
  4. 2.1. Geological and geophysical characteristics of the region

  5. 2.2. Alternative conductivity models

  6. 2.3. Numerical modeling of magnetotelluric fields

  7. 2.4. Conclusions

    1. MT imaging internal structure of volcanoes
  8. 3.1. Simplified model of the volcano

  9. 3.2. Synthetic MT pseudosections

  10. 3.3. Methodology of interpretation of the MT data measured over the relief surface

    1. Simulation of MT monitoring of the magma chamber conductivity
  11. 4.1. Geoelectric model of a central type volcano

  12. 4.2. Detection of the magma chamber by MT data

  13. 4.3. Estimation of MT data resoling power with respect to the conductivity variations in the magma chamber

  14. 4.4. “Guidelines” for MT monitoring electric conductivity in a magma chamber

    1. Simulation of MT monitoring the ground water salinity
  15. 5.1. Statement of the problem

  16. 5.2. Modeling of the salt water intrusion zone mapping by audio MT data

  17. Regional magnetotelluric explorations in Russia (V. Bubnov, E. Aleksanova, M. Berdichevsky, P. Pushkarev, A.Yakovlev, D.Yakovlev)

    1. Introduction
    1. Observation technology
    1. MT-data processing, analysis and interpretation
    1. Case histories:
  18. 4.1. East-European craton

  19. 4.2. Caucasus, the Urals, Siberia and North East Russia

  20. EM studies at seas and oceans (N. Palshin)

    1. Conductivity structure of sea and ocean floor
  21. 1.1. Background conductivity structure of the ocean crust and upper mantle

  22. 1.2. Principle objectives of marine EM studies

    1. Instrumentation for marine EM studies
  23. 2.1. Seafloor controlled source frequency and transient EM sounding

  24. 2.2. Measurements of variations of natural EM fields on the seafloor

    1. Some results of EM sounding in seas and oceans
  25. 3.1. Studies of gas hydrates in seabed sediments of continental slopes

  26. 3.2. Studies of buried salt dome-like structures

  27. 3.3. The Reykjanes Axial Melt Experiment: Structural Synthesis from Electromagnetics and Seismics (RAMESSES project)

  28. 3.4. Seafloor MT soundings of the Eastern-Pacific rise at 9º50'N

  29. 3.5. Mantle Electromagnetic and Tomography Experiment (MELT)

    1. Deep seafloor EM studies in the Northwestern Pacific

Description

Based on lectures given in the First Russian School-Seminar on electromagnetic soundings of the Earth held in Moscow on 15th November, 2003, this book acquaints scientists and technologists with the latest achievements in theory, techniques and practical applications of the methods of electromagnetic sounding. This three part text covers the methods considered for Earth electromagnetic sounding on a global, regional, and local scale; modern methods for solving forward and inverse problems of geoelectrics, particularily contemporary approaches to the EM data modeling and interpretation in the class of three-dimensional models; and the results of regional EM on-land and sea soundings

Key Features

  • Presents theoretical and methodological findings, as well as examples of applications of recently developed algorithms and software in solving practical problems
  • Describes the practical importance of electromagnetic data through enabling discussions on a construction of a closed technological cycle, processing, analysis and three-dimensional interpretation
  • Updates current findings in the field, especially with MT, magnetovariational and seismo-electriccal methods and the practice of 3D interpretaions

Readership

geochemists, geophysists


Details

No. of pages:
404
Language:
English
Copyright:
© Elsevier Science 2007
Published:
14th November 2006
Imprint:
Elsevier Science
Hardcover ISBN:
9780444529381
eBook ISBN:
9780080466866

Ratings and Reviews


About the Author

Viacheslav Spichak

With over 30 years’ geophysics experience, Dr. Spichak’s main research interests include joint interpretation of electromagnetic and other geophysical data, indirect estimation of the Earth’s physical properties from the ground electromagnetic data, and computational electromagnetics. Spichak has authored and edited 8 books with Elsevier, including Electromagnetic Sounding of the Earth's Interior (2015). He is the winner of the Gamburtsev award for the monograph “Magnetotelluric fields in three-dimensional models of geoelectrics” (1999) and the Schmidt medal for outstanding achievements in Geophysics (2010).

Affiliations and Expertise

Head, Lab EM Data Interpretation Methodology, Geoelectromagnetic Research Centre IPE RAS, Moscow, Russia

About the Editor

Viacheslav Spichak

With over 30 years’ geophysics experience, Dr. Spichak’s main research interests include joint interpretation of electromagnetic and other geophysical data, indirect estimation of the Earth’s physical properties from the ground electromagnetic data, and computational electromagnetics. Spichak has authored and edited 8 books with Elsevier, including Electromagnetic Sounding of the Earth's Interior (2015). He is the winner of the Gamburtsev award for the monograph “Magnetotelluric fields in three-dimensional models of geoelectrics” (1999) and the Schmidt medal for outstanding achievements in Geophysics (2010).

Affiliations and Expertise

Head, Lab EM Data Interpretation Methodology, Geoelectromagnetic Research Centre IPE RAS, Moscow, Russia