Natural Electromagnetic Fields In Pure And Applied Geophysics - Roy Kalyan Kumar | Libro Springer 02/2021 - HOEPLI.it


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roy kalyan kumar - natural electromagnetic fields in pure and applied geophysics

Natural Electromagnetic Fields in Pure and Applied Geophysics




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Dettagli

Genere:Libro
Lingua: Inglese
Editore:

Springer

Pubblicazione: 02/2021
Edizione: 1st ed. 2020





Trama

This research monograph presents all the branches of geophysics based on natural electromagnetic fields and their associated subjects. Meant for postgraduate and research level courses, it includes research guidance and collection of magnetotelluric data in some parts of Eastern India and their qualitative and quantitative interpretation. Specific topics highlighted include (i) Electrotellurics, (ii) Magnetotellurics, (iii) Geomagnetic Depth Sounding and Magnetometer Array Studies, (iv) Audio Frequency Magnetotellurics and Magnetic Methods, (v) Marine Magnetotelluric and Marine Controlled Source Electromagnetic Methods, (vi) Electrical Conductivity of Rocks and Minerals and (vii) Mathematical Modelling and Some Topics on Inversion needed for Interpretation of Geoelectrical Data.




Sommario

Chapter 1. General Introduction
1.1 Introduction
1.2 Preliminaries on Electromagnetic Waves and Their Application in Geophysical Investigation
1.3 Geomagnetic Field
1.3.1 Magnetic Field of Internal Origin
1.3.1.1 Dipole Field of Internal Origin
1.3.1.2 Nondipole Field of Internal Origin
1.3.1.3 Inclination and Declination of the Magnetic Field
1.3.2 Nondipole Time Varying Magnetic Field of External Origin
1.4 Solar Radiation
1.5 Solar Energy
1.6 Sun Spot Cycle
1.7 Solar Quiet Day (Sa) Variations
1.8 L. Variations
1.9 Equatorial Electrojet (EEJ) and Polar Electrojet (PEJ)
1.10 Solar Flare Effects (SFE)
1.11 Magnetic Storms and Substorms
1.12 D, Dst, Ds Variations
1.13 Bay Type Variations
1.14 Interaction Between the Sun and the Earth
1.15 Magnetosphere
1.16 Cosmic Rays
1.17 Van Allen Radiation Belt
1.18 Ionosphere
1.19 Ring Current
1.20 Magnetotail
1.21 Geomagnetic Field Variations
1.22 Classifications and Causes of the Different Pulsations and Micropulsations
1.22.1 Classification by Jacobs and Sinno (1960)
1.22.2 Classification by Madam Troitskaya (1962)
1.22.3 Classification by Benioff (1960)
1.22.4 Classification by Tepley and Wentworth (1962)
1.22.5 Classification by Vladimirov and Kleimenova (1962)
1.23 High Frequency Natural Electromagnetic Signals, Sferics
1.24 Earth's Natural Electromagnetic Fields as a Subject
1.24.1 Electrotelluric Method (T)
1.24.2 Magnetotelluric Methods (MT)
1.24.3 Geomagnetic Depth Sounding (GDS)
1.24.4 Magnetometer Array Studies (MA)
1.24.5 Magnetovariational Sounding (MVS)
1.24.6 Audiofrequency Magnetotelluric Method (AMT)
1.24.7 Sea Floor Magnetotelluric Method (SFMT)
1.24.8 Marine Magnetotellurics (MMT)
1.24.9 Audiofrequency Magnetic Method (AFMAG)
1.25 Controlled Sources
1.25.1 Controlled Source Audiofrequency Magnetotellurics (CSAMT)
1.25.2 Controlled Source Marine Electromagnetics (CSEM)
1.25.3 Long Offset Electromagnetic Transient (LOTEM)
1.25.4 Radio Magnetotellurics (RMT)
1.26 Coverage of This Book
1.27 References

Chapter 2. Electrical Conduction Through Rocks
2.1 Introduction
2.2 Electrical Conductivity
2.2.1 Expression of Electrical Conductivity for an Homogeneous and Isotropic Medium due to a Point Source of Current
2.2.2 Specific Resistivity or Conductivity
2.2.3 Ohm's Law
2.3 Electrical Permittivity and Displacement Current
2.3.1 Dielectric Constant
2.3.2 Electric Displacement and Displacement Vector D
2.3.3 Tensor Electrical Permittivity 
2.4 Magnetic Induction and Magnetic Permeability
2.4.1 Magnetic Induction
2.4.2 Magnetic Permeability
2.5 Principal Methods of Electrical Conduction
2.5.1 Electronic Conduction (Conduction Through Metals)
2.5.2 Conduction of Current Through Semiconductors
2.5.3 Conduction of Current Through Solid Electrolytes
2.5.4 Conduction of Current Through Electrical Displacement
2.5.5 Electrolytic or Ionic Conduction
2.6 Factors Which Control the Electrical Conductivity of the Earth
2.6.1 Porosity of Rocks
2.6.2 Conductivity of Pore Fluids
2.6.3 Size and Shape of Pore Spaces
2.6.4 Conductivity of Mineral Inclusions
2.6.5 Size and Shape of Mineral Grains
2.6.6 Temperature
2.6.7 Frequency of Excitation Current
2.6.8 Ductility and Degree of Partial Melt in Rocks
2.6.9 Electrical Conductivity of Different Types of Rocks
2.6.10 Chemical Activity and Oxygen Fugacity
2.6.11 Dependence of Electrical Conductivity on Pressure
2.6.12 Dependence of Electrical Conductivity on Volatiles
2.6.13 Major Geological Zones of Weaknesses
2.7 Piejoelectric Effect
2.8 Hall Effect
2.9 Maxwells Geoelectrical Conductivity Model
2.9.1 Soft Rock
2.9.2 Hard Rock
2.9.3 Ellipsoidal Grains
2.9.4 Alternating Current Conduction
2.10 Resisitivities of Metallic Rocks and Minerals
2.11 Semiconducting Minerals
2.12 Order of Electrical Conductivity of Some Common Metallic Ores
2.13 Some Common Geological Good and Bad Conductors
2.14 References

Chapter 3. Signal Processing
3.1 Introduction
3.2 Selection of Block Size
3.3 Manual Editing of Time Series
3.4 Moving Average Algorithm
3.5 Trend Elimination
3.6 Fourier Series
3.7 Complex Fourier Series
3.8 Fourier Series for Discrete Time Period Signal
3.9 Integral Transforms
3.10 Fourier Transforms
3.11 Sinc Function
3.12 Two Dimensional Fourier Transform
3.13 Aperiodic Function and Fourier Integral
3.14 Discrete Fourier Transform
3.15 Fast Fourier Transform
3.16 Dirac Delta Function
3.17 Shanons Sampling Theorem
3.18 Linear Filter
3.19 Pulse Response of a Linear Filter
3.20 Convolution
3.21 Z. Transform
3.22 Filters and Windows
3.23 Cross Correlation and Autocorrelation
3.23.1 Cross Correlation
3.23.2 Autocorrelation
3.23.3 Properties of Auto and Cross Correlation
3.24 Autopower and Cross Power Spectrum
3.24.1 Energy Density Spectrum of a Periodic Signal
3.24.2 Power Density Spectrum of a Periodic Signal
3.24.3 Auto Power Spectra
3.24.4 Cross Power Spectra
3.25 Noise
3.26 Robust Processing
3.26.1 Introduction
3.26.2 Outliers
3.26.3 Breakdown Point
3.26.4 Median
3.26.5 Norm
3.26.6 Nongaussian Distribution
3.26.7 Seigel's Repeated Median Estimator
3.26.8 M-Estimator
3.26.9 Field Results
3.27 References

Chapter 4. Electrotellurics
4.1 Introduction
4.2 Basics of Electrotellurics
4.3 Comparison of Electrotelluric and Magnetotelluric Frequencies
4.4 Nature of Telluric Field
4.5 Electrotelluric Method
4.6 Potential Measuring Probes
4.6.1 Electrode Potential
4.6.2 Non Polarisable Electrodes
4.7 Field Recording
4.8 Relative Ellipse
4.8.1 Interconnection Between Base and Mobile Station Vectors
4.8.2 Time Domain Analysis
4.8.3 Electrotelluric Data Analysis
4.9 Triangle Method
4.10 Polygon Method
4.11 Discussion
4.12 Amplitude Ratio Method
4.13 Album of Theoretical Electrotelluric Profile Curves
4.13.1 Telluric Field over a Vertical Fault
4.13.2 Telluric Field over a Basement Asymmetric Anticlinal Structure
4.13.3 Telluric Field over Horst Type of Structure
4.13.4 Telluric Field over a Graben Type of Structure
4.13.5 Telluric Field and its Gradient over a Step Fault
4.14 Analytical Continuation of Telluric Field Data
4.15 Absolute Ellipse Method
4.15.1 Absolute Ellipses
4.15.2 Field Plotting of Absolute Ellipse
4.15.3 Model Tank Experiment for Generation of Absolute Ellipse
4.15.4 Model Tank Generated Absolute Ellipse and the Variation of the Ellipse Parameter due to Simulated Geological Inho




Autore

Kalyan Kumar Roy helds  M.Sc and Ph.D from the Department of Geology and Geophysics , Indian Institute of Technology, Kharagpur, West Bengal, India. In 1966,he joined as a faculty member in the same department. In 1975 Dr. Roy was offered post doctorate fellowship  of the National Research Council of Canada,  by the Department of Environment , Ottawa, Canada for a period of one year. He returned from Canada  and joined the same department as a faculty member. He retired as a Professor of Geophysics in the year 2002 after 36 years of service. He then served as an Emeritus Scientist in the Department of Geological Sciences, Jadavpur University, Kolkata from 2003 to 2009 and as an Adjunct Professor at IIT,Kharagpur from 2010 to 2011. He was a Guest Professor of the Department of Applied Geology, Dibrugarh University , Assam from 2013 to 2015. He joined as a Visiting Professor in the Department of Earth Sciences, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal, India  in 2011 and continued upto 2019. He has published 77 papers, one single authorship book, one edited volume of multi authorship book  and contributed in several multi aurhored books.

Dr.Roy was selected as a fellow of the National Academy of Science and fellows and life members of all the important Earth Science Societies of India. He is a life member of the Society of Petroleum Geophysicists based in Houston Texas, USA and Dehradun, Uttarakhand,I ndia. He attended many international conferences organized by I.U.G.G. (International Union of Geodesy and Geophysics),I.G.C.(International Geological Congress) and Electromagnetic workshops.








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Altre Informazioni

ISBN:

9783030380991

Condizione: Nuovo
Collana: Springer Geophysics
Dimensioni: 235 x 155 mm Ø 1060 gr
Formato: Brossura
Illustration Notes:290 Illustrations, black and white
Pagine Arabe: 605
Pagine Romane: xxvi





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