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UID:

Format: 1 online resource (373 p.)

ISBN: 1-4832-7501-9

Series Statement: Methods in Geochemistry and Geophysics ; 3

Content: Methods in Geochemistry and Geophysics, 3: Mining Geophysics focuses on the geophysical methods of ore prospecting, including radioactivity, collection of geophysical data, and field measurements. The manuscript first highlights the role of geophysics in ore prospecting and the general aspects of collection and presentation of geophysical data. Discussions focus on classification of geophysical methods, radioactivity, collection of preliminary information, field measurement, and isoanomaly curves. The text then surveys magnetic and self-potential methods, as well as the general magnetic proper

Note: "With 128 illustrations and 11 tables"--T.p. verso. , Front Cover; Mining Geophysics; Copyright Page; Dedication; Preface; Table of Contents; CHAPTER 1. The Role of Geophysics in Ore Prospecting; CHAPTER 2. General Aspects of the Collection and Presentation of Geophysical Data; CLASSIFICATION OF GEOPHYSICAL METHODS; RADIOACTIVITY; COLLECTION OF PRELIMINARY INFORMATION; TRIAL SURVEYS; STAKING AN AREA; FIELD MEASUREMENTS; GEOPHYSICAL MAPS; ISOANOMALY CURVES; INTERPRETATION; CHAPTER 3. Magnetic Methods; INTRODUCTION; RECALLING SOME FUNDAMENTAL CONCEPTS; INDUCED AND PERMANENT MAGNETISM; GENERAL MAGNETIC PROPERTIES OF ROCKS; SUSCEPTIBILITIES OF ROCKS , PERMANENT MAGNETIZATION (REMANENCE) OF ROCKSMEASUREMENT OF SUSCEPTIBILITY AND REMANENCE; THE GEOMAGNETIC FIELD; MAGNETOMETERS; THE ZERO LEVEL; AN OREBODY AS A MAGNET; INTERPRETATION OF MAGNETIC ANOMALIES; A SIMPLE EXAMPLE OF A MAGNETIC SURVEY (U-DAL, CENTRAL SWEDEN); MAGNETIC SURVEY IN THE E-O OREFIELD (CENTRAL SWEDEN); TRANSVERSE MAGNETIZATION; A SIMPLE GEOMETRICAL CONSTRUCTION FOR DETERMINING THE POSITION OF AN ORE SHEET; MAGNETIC EFFECTS OF BROAD ZONES; THE GREENSTONE AREA OF LOOS (SWEDEN); VECTOR MEASUREMENTS; EXAMPLE OF VECTOR MEASUREMENTS; BOREHOLE MEASUREMENTS , NOTE ON REVERSE MAGNETIC ANOMALIESCHAPTER 4. The Self-Potential Method; INTRODUCTION; ORIGIN OF SELF-POTENTIALS; MEASUREMENT OF SELF-POTENTIALS; FIELD PROCEDURE; EXAMPLES OF SP SURVEYS; CHAPTER 5. Electromagnetic Methods; INTRODUCTION; GEOMETRY OF THE ELECTROMAGNETIC FIELD; THE TILT-ANGLE METHOD; AMPLITUDE AND PHASE; THE PHASE ANGLE AND THE VECTOR DIAGRAM; REAL AND IMAGINARY COMPONENTS; MEASUREMENT OF THE REAL AND IMAGINARY COMPONENTS; CLASSIFICATION OF ELECTROMAGNETIC METHODS; FIXED-SOURCE METHODS; LOOP LAYOUTS; MOVING SOURCE-RECEIVER METHODS; EXAMPLES OF MOVING SOURCE-RECEIVER SURVEYS , USE OF TWO FREQUENCIES IN ELECTROMAGNETIC PROSPECTINGDEPTH PENETRATION OF ELECTROMAGNETIC METHODS; AFMAG; CHAPTER 6. Electrical Methods; INTRODUCTION; RESISTIVITY; RESISTIVITY OF ROCKS AND MINERALS; APPARATUS; COMMUTATION OF CURRENT; EQUIPOTENTIAL METHOD; EARTH-RESISTIVITY METHODS; APPARENT RESISTIVITY; ELECTRODE CONFIGURATIONS IN RESISTIVITY METHODS; ELECTRIC DRILLING; ELECTRIC MAPPING; MAPPING BY LINEAR CURRENT ELECTRODES (THEORY); FIELD EXAMPLES OF LINE-ELECTRODE MAPPING; THE "MISE-À-LA-MASSE" METHOD; RESISTIVITY MEASUREMENTS IN BOREHOLES; CHAPTER 7. Induced Polarization Methods , INTRODUCTIONORIGIN OF INDUCED POLARIZATION; THE CONDENSER MODEL; EFFECT OF ALTERNATING CURRENT; TIME-DOMAIN AND FREQUENCY-DOMAIN IP METHODS; MEASURES OF THE IP EFFECT; POLARIZABILITY OF MINERALS AND ROCKS; TWO EXAMPLES OF IP SURVEYS; CHAPTER 8. Gravity Methods; INTRODUCTION; SCOPE OF THE GRAVITY METHOD IN ORE PROSPECTING; SOME DIFFICULTIES; ABSOLUTE AND RELATIVE GRAVITY MEASUREMENTS; GRAVIMETERS; FIELD PROCEDURE; CORRECTIONS TO GRAVIMETER OBSERVATIONS; THE BOUGUER ANOMALY; DENSITY DETERMINATION; INTERPRETATION OF GRAVITY ANOMALIES; KEY VARIABLES OF GRAVITY INTERPRETATION , GRAVITY PROFILES ACROSS SIMPLE STRUCTURES , English

Additional Edition: ISBN 1-322-29260-4

Additional Edition: ISBN 1-4832-3030-9

Language: English

UID:

Format: X, 275 S. : , Ill., graph. Darst.

Edition: 3. ed.

ISBN: 0-412-15140-5 , 0-412-15810-8

Series Statement: Science paperbacks 153

Language: English

Subjects: Geography

Keywords: Geophysik ; Methode ; Angewandte Geophysik

UID:

Format: XIX, 395 S. : Ill., graph. Darst.

Edition: 2. rev. and up-dated ed.

ISBN: 0444410775

Series Statement: Methods in geochemistry and geophysics 3

Note: MAB0014.001: G 6793

In: Methods in geochemistry and geophysics

UID:

Format: 1 Online-Ressource (X, 402 p. 5 illus)

Edition: Fourth edition

ISBN: 9789400941137

Content: Anyone who compares the present thoroughly revised and enlarged edition of this book with the three previous ones, the first of which was published in 1962, may well ask whether the principles of applied geophysics have become more numerous during the last 25 years or so. Such is not the case and the much larger size of the present edition is due to the principles' having been explained in greater detail than heretofore. There are major and minor alterations, additions and emendations, too numerous to be listed here, throughout the book but I would like to draw attention specifically to some of them. The chapter on seismic methods is now far more extensive than before and so are also the chapters on electric and electromagnetic methods. There is also a separate chapter on well logging in oil fields giving the essential ideas. Considering the virtual plethora of available books on seismic methods and on well logging I have not thought it necessary to extend these chapters further. This has enabled me to keep the book to a reasonable length and at the same time retain its fairly comprehensive character. Other features of the present edition are solved examples in the text and the problems at the end of all principal chapters. Answers and hints to the latter are given at the end of the book

Additional Edition: Erscheint auch als Druck-Ausgabe ISBN 9780412283307

Language: English

Subjects: Geography

Keywords: Geophysik ; Methode ; Angewandte Geophysik

DOI: 10.1007/978-94-009-4113-7

URL: Volltext  (URL des Erstveröffentlichers)

UID:

Format: 1 Online-Ressource (X, 276 p)

Edition: Third Edition

ISBN: 9789400958142

Content: The welcome accorded to the first two editions of this book has been most encouraging. The object of the third edition continues to be to give a brief but "fairly comprehensive survey of the methods of applied geophysics including some of the modern interpretation techniques. The general approach and plan of the previous editions are preserved, but in bringing the book up to date some changes have been made to which I would like to draw the reader's special attention. SI units are strictly adhered to except in six illustrative figures reproduced from older literature and left intact to save some extensive redraughting. Following the recommendation of the International Union of Geodesy and Geophysics, the magnetic field measured in geophysical work is labelled here as flux density (tesla). Consequently, the symbols H, Z and T commonly used in geomagnetic work should stand for flux density. In the Max wellian theory of electromagnetism the symbol H stands, by convention, for a magnetizing force (A m -1) and a discerning reader will at once sense a source of confusion. This source of confusion is avoided in the present edition by B , B and B instead of H, Z and T. The employing the symbols b z t latter ~et is employed for the corresponding magnetizing forces of the earth's field. I hope this notation will gain general acceptance because it so easily dispenses with an ambiguity that otherwise tends to lead to unnecessary confusion of units and dimensions in geomagnetism

Additional Edition: Erscheint auch als Druck-Ausgabe ISBN 9780412158100

Language: English

Subjects: Geography

Keywords: Geophysik ; Methode ; Angewandte Geophysik

DOI: 10.1007/978-94-009-5814-2

URL: Volltext  (URL des Erstveröffentlichers)

UID:

Format: 20 S. , Ill.

Series Statement: Abstracts of Uppsala dissertations in science 64

Note: Uppsala, Diss., 29.01.1966 (Auszug)

Language: English

UID:

Format: 1 online resource (373 p.)

ISBN: 1-4832-7501-9

Series Statement: Methods in Geochemistry and Geophysics ; 3

Content: Methods in Geochemistry and Geophysics, 3: Mining Geophysics focuses on the geophysical methods of ore prospecting, including radioactivity, collection of geophysical data, and field measurements. The manuscript first highlights the role of geophysics in ore prospecting and the general aspects of collection and presentation of geophysical data. Discussions focus on classification of geophysical methods, radioactivity, collection of preliminary information, field measurement, and isoanomaly curves. The text then surveys magnetic and self-potential methods, as well as the general magnetic proper

Note: "With 128 illustrations and 11 tables"--T.p. verso. , Front Cover; Mining Geophysics; Copyright Page; Dedication; Preface; Table of Contents; CHAPTER 1. The Role of Geophysics in Ore Prospecting; CHAPTER 2. General Aspects of the Collection and Presentation of Geophysical Data; CLASSIFICATION OF GEOPHYSICAL METHODS; RADIOACTIVITY; COLLECTION OF PRELIMINARY INFORMATION; TRIAL SURVEYS; STAKING AN AREA; FIELD MEASUREMENTS; GEOPHYSICAL MAPS; ISOANOMALY CURVES; INTERPRETATION; CHAPTER 3. Magnetic Methods; INTRODUCTION; RECALLING SOME FUNDAMENTAL CONCEPTS; INDUCED AND PERMANENT MAGNETISM; GENERAL MAGNETIC PROPERTIES OF ROCKS; SUSCEPTIBILITIES OF ROCKS , PERMANENT MAGNETIZATION (REMANENCE) OF ROCKSMEASUREMENT OF SUSCEPTIBILITY AND REMANENCE; THE GEOMAGNETIC FIELD; MAGNETOMETERS; THE ZERO LEVEL; AN OREBODY AS A MAGNET; INTERPRETATION OF MAGNETIC ANOMALIES; A SIMPLE EXAMPLE OF A MAGNETIC SURVEY (U-DAL, CENTRAL SWEDEN); MAGNETIC SURVEY IN THE E-O OREFIELD (CENTRAL SWEDEN); TRANSVERSE MAGNETIZATION; A SIMPLE GEOMETRICAL CONSTRUCTION FOR DETERMINING THE POSITION OF AN ORE SHEET; MAGNETIC EFFECTS OF BROAD ZONES; THE GREENSTONE AREA OF LOOS (SWEDEN); VECTOR MEASUREMENTS; EXAMPLE OF VECTOR MEASUREMENTS; BOREHOLE MEASUREMENTS , NOTE ON REVERSE MAGNETIC ANOMALIESCHAPTER 4. The Self-Potential Method; INTRODUCTION; ORIGIN OF SELF-POTENTIALS; MEASUREMENT OF SELF-POTENTIALS; FIELD PROCEDURE; EXAMPLES OF SP SURVEYS; CHAPTER 5. Electromagnetic Methods; INTRODUCTION; GEOMETRY OF THE ELECTROMAGNETIC FIELD; THE TILT-ANGLE METHOD; AMPLITUDE AND PHASE; THE PHASE ANGLE AND THE VECTOR DIAGRAM; REAL AND IMAGINARY COMPONENTS; MEASUREMENT OF THE REAL AND IMAGINARY COMPONENTS; CLASSIFICATION OF ELECTROMAGNETIC METHODS; FIXED-SOURCE METHODS; LOOP LAYOUTS; MOVING SOURCE-RECEIVER METHODS; EXAMPLES OF MOVING SOURCE-RECEIVER SURVEYS , USE OF TWO FREQUENCIES IN ELECTROMAGNETIC PROSPECTINGDEPTH PENETRATION OF ELECTROMAGNETIC METHODS; AFMAG; CHAPTER 6. Electrical Methods; INTRODUCTION; RESISTIVITY; RESISTIVITY OF ROCKS AND MINERALS; APPARATUS; COMMUTATION OF CURRENT; EQUIPOTENTIAL METHOD; EARTH-RESISTIVITY METHODS; APPARENT RESISTIVITY; ELECTRODE CONFIGURATIONS IN RESISTIVITY METHODS; ELECTRIC DRILLING; ELECTRIC MAPPING; MAPPING BY LINEAR CURRENT ELECTRODES (THEORY); FIELD EXAMPLES OF LINE-ELECTRODE MAPPING; THE "MISE-À-LA-MASSE" METHOD; RESISTIVITY MEASUREMENTS IN BOREHOLES; CHAPTER 7. Induced Polarization Methods , INTRODUCTIONORIGIN OF INDUCED POLARIZATION; THE CONDENSER MODEL; EFFECT OF ALTERNATING CURRENT; TIME-DOMAIN AND FREQUENCY-DOMAIN IP METHODS; MEASURES OF THE IP EFFECT; POLARIZABILITY OF MINERALS AND ROCKS; TWO EXAMPLES OF IP SURVEYS; CHAPTER 8. Gravity Methods; INTRODUCTION; SCOPE OF THE GRAVITY METHOD IN ORE PROSPECTING; SOME DIFFICULTIES; ABSOLUTE AND RELATIVE GRAVITY MEASUREMENTS; GRAVIMETERS; FIELD PROCEDURE; CORRECTIONS TO GRAVIMETER OBSERVATIONS; THE BOUGUER ANOMALY; DENSITY DETERMINATION; INTERPRETATION OF GRAVITY ANOMALIES; KEY VARIABLES OF GRAVITY INTERPRETATION , GRAVITY PROFILES ACROSS SIMPLE STRUCTURES , English

Additional Edition: ISBN 1-322-29260-4

Additional Edition: ISBN 1-4832-3030-9

Language: English

UID:

Format: X, 276 p. , online resource.

Edition: 1st ed. 1979.

ISBN: 9789400958142

Content: The welcome accorded to the first two editions of this book has been most encouraging. The object of the third edition continues to be to give a brief but "fairly comprehensive survey of the methods of applied geophysics including some of the modern interpretation techniques. The general approach and plan of the previous editions are preserved, but in bringing the book up to date some changes have been made to which I would like to draw the reader's special attention. SI units are strictly adhered to except in six illustrative figures reproduced from older literature and left intact to save some extensive redraughting. Following the recommendation of the International Union of Geodesy and Geophysics, the magnetic field measured in geophysical work is labelled here as flux density (tesla). Consequently, the symbols H, Z and T commonly used in geomagnetic work should stand for flux density. In the Max­ wellian theory of electromagnetism the symbol H stands, by convention, for a magnetizing force (A m -1) and a discerning reader will at once sense a source of confusion. This source of confusion is avoided in the present edition by B , B and B instead of H, Z and T. The employing the symbols b z t latter ~et is employed for the corresponding magnetizing forces of the earth's field. I hope this notation will gain general acceptance because it so easily dispenses with an ambiguity that otherwise tends to lead to unnecessary confusion of units and dimensions in geomagnetism.

Note: 1 Introduction -- 2 Magnetic methods -- 2.1 Short history -- 2.2 The static magnetic field -- 2.3 Magnetic properties of rocks -- 2.4 The geomagnetic field -- 2.5 Instruments of magnetic surveying -- 2.6 Relative merits of ?Bh, ?BZ and ?Bt measurements -- 2.7 Field procedure -- 2.8 The interpretation of magnetic anomalies -- 2.9 Geological features -- 2.10 Anomalies of sheets and prisms -- 2.11 The Smith rules -- 2.12 Some examples of magnetic investigations -- 2.13 Measurement of susceptibility and remanence -- 3 Gravitational methods -- 3.1 Introduction -- 3.2 Gravimeters -- 3.3 Field procedure -- 3.4 Corrections to gravity observations -- 3.5 Marine gravity measurements -- 3.6 The Bouguer anomaly -- 3.7 Density determinations -- 3.8 Interpretation -- 3.9 Limitations on gravity interpretation -- 3.10 Depth determinations -- 3.11 Determination of total mass -- 3.12 Vertical derivatives of gravity -- 3.13 Illustrations of gravity surveys and interpretation -- 3.14 Note on the Eötvös torsion balance -- 3.15 Derivation of Formula (3.10c) -- 4 Electrical methods -- 4.1 Introduction -- 4.2 Self-potential -- 4.3 Earth resistivity -- 4.4 Layered earth -- 4.5 Kernel function and resistivity transform -- 4.6 Determination of layered earth parameters -- 4.7 Vertical and dipping discontinuities -- 4.8 Electrical mapping, anisotropic earth and logging -- 4.9 The resistivity of rocks and minerals -- 5 Induced polarization -- 5.1 Introduction -- 5.2 Measures of IP -- 5.3 Origin of IP -- 5.4 Electromagnetic coupling -- 5.5 Example of an IP survey -- 6 Electromagnetic continuous wave, transient-field and telluric methods -- 6.1 Introduction -- 6.2 Near and far fields -- 6.3 Phase and polarization -- 6.4 Classification of continuous wave methods -- 6.5 The Compensator or Sundberg method -- 6.6 The Turam method -- 6.7 The moving source and receiver method (tandem outfits) -- 6.8 Broadside and shoot-back techniques -- 6.9 Far-field methods -- 6.10 Theoretical approaches (continuous waves) -- 6.11 Model experiments -- 6.12 Depth penetration -- 6.13 Transient-field methods (time-domain EM) -- 6.14 Natural-field methods -- 6.15 Influence of magnetic permeability -- 6.16 Airborne measurements -- 6.17 Note on the design of electromagnetic coils -- 7 Seismic methods -- 7.1 Introduction -- 7.2 Elastic constants and waves -- 7.3 Instruments and field procedure -- 7.4 The refraction method -- 7.5 The reflection method -- 7.6 Corrections to arrival times -- 7.7 The seismic pulse -- 7.8 Filtering and geophone arrays -- 7.9 Convolution and synthetic seismograms -- 7.10 Deconvolution -- 7.11 Continuous velocity logging (CVL) -- 7.12VIBROSEIS -- 8 Radioactivity methods -- 8.1 Introduction -- 8.2 Theoretical background -- 8.3 Radioactivity of rocks -- 8.4 Radiation detectors and field procedure -- 8.5 Radon measurements -- 8.6 Radioactive density determinations -- 8.7 Airborne radioactivity measurements -- 9 Miscellaneous methods and topics -- 9.1 Borehole magnetometer -- 9.2 Gamma-ray logging -- 9.3 Neutron logging -- 9.4 Geothermal methods -- 9.5 Geochemical prospecting -- 9.6 Optimum point and line spacing -- 9.7 Position location in airborne surveying -- 9.8 Composite surveys -- Appendix 1 Magnetic potential -- Appendix 2 Transition energy in the alkali vapour magnetometer -- Appendix 3 Magnetized sphere and a magnetic dipole -- Appendix 4 Magnetic potential of a linear dipole -- Appendix 5 Magnetic anomaly of a thick sheet -- Appendix 6 Potential of a point current electrode on the surface of a horizontally-layered earth -- Appendix 7 Fourier transforms and convolution -- References.

In: Springer Nature eBook

Additional Edition: Printed edition: ISBN 9780412158100

Additional Edition: Printed edition: ISBN 9789400958159

Language: English

DOI: 10.1007/978-94-009-5814-2

URL: https://doi.org/10.1007/978-94-009-5814-2

UID:

Format: 1 online resource (373 p.)

ISBN: 1-4832-7501-9

Series Statement: Methods in Geochemistry and Geophysics ; 3

Content: Methods in Geochemistry and Geophysics, 3: Mining Geophysics focuses on the geophysical methods of ore prospecting, including radioactivity, collection of geophysical data, and field measurements. The manuscript first highlights the role of geophysics in ore prospecting and the general aspects of collection and presentation of geophysical data. Discussions focus on classification of geophysical methods, radioactivity, collection of preliminary information, field measurement, and isoanomaly curves. The text then surveys magnetic and self-potential methods, as well as the general magnetic proper

Note: "With 128 illustrations and 11 tables"--T.p. verso. , Front Cover; Mining Geophysics; Copyright Page; Dedication; Preface; Table of Contents; CHAPTER 1. The Role of Geophysics in Ore Prospecting; CHAPTER 2. General Aspects of the Collection and Presentation of Geophysical Data; CLASSIFICATION OF GEOPHYSICAL METHODS; RADIOACTIVITY; COLLECTION OF PRELIMINARY INFORMATION; TRIAL SURVEYS; STAKING AN AREA; FIELD MEASUREMENTS; GEOPHYSICAL MAPS; ISOANOMALY CURVES; INTERPRETATION; CHAPTER 3. Magnetic Methods; INTRODUCTION; RECALLING SOME FUNDAMENTAL CONCEPTS; INDUCED AND PERMANENT MAGNETISM; GENERAL MAGNETIC PROPERTIES OF ROCKS; SUSCEPTIBILITIES OF ROCKS , PERMANENT MAGNETIZATION (REMANENCE) OF ROCKSMEASUREMENT OF SUSCEPTIBILITY AND REMANENCE; THE GEOMAGNETIC FIELD; MAGNETOMETERS; THE ZERO LEVEL; AN OREBODY AS A MAGNET; INTERPRETATION OF MAGNETIC ANOMALIES; A SIMPLE EXAMPLE OF A MAGNETIC SURVEY (U-DAL, CENTRAL SWEDEN); MAGNETIC SURVEY IN THE E-O OREFIELD (CENTRAL SWEDEN); TRANSVERSE MAGNETIZATION; A SIMPLE GEOMETRICAL CONSTRUCTION FOR DETERMINING THE POSITION OF AN ORE SHEET; MAGNETIC EFFECTS OF BROAD ZONES; THE GREENSTONE AREA OF LOOS (SWEDEN); VECTOR MEASUREMENTS; EXAMPLE OF VECTOR MEASUREMENTS; BOREHOLE MEASUREMENTS , NOTE ON REVERSE MAGNETIC ANOMALIESCHAPTER 4. The Self-Potential Method; INTRODUCTION; ORIGIN OF SELF-POTENTIALS; MEASUREMENT OF SELF-POTENTIALS; FIELD PROCEDURE; EXAMPLES OF SP SURVEYS; CHAPTER 5. Electromagnetic Methods; INTRODUCTION; GEOMETRY OF THE ELECTROMAGNETIC FIELD; THE TILT-ANGLE METHOD; AMPLITUDE AND PHASE; THE PHASE ANGLE AND THE VECTOR DIAGRAM; REAL AND IMAGINARY COMPONENTS; MEASUREMENT OF THE REAL AND IMAGINARY COMPONENTS; CLASSIFICATION OF ELECTROMAGNETIC METHODS; FIXED-SOURCE METHODS; LOOP LAYOUTS; MOVING SOURCE-RECEIVER METHODS; EXAMPLES OF MOVING SOURCE-RECEIVER SURVEYS , USE OF TWO FREQUENCIES IN ELECTROMAGNETIC PROSPECTINGDEPTH PENETRATION OF ELECTROMAGNETIC METHODS; AFMAG; CHAPTER 6. Electrical Methods; INTRODUCTION; RESISTIVITY; RESISTIVITY OF ROCKS AND MINERALS; APPARATUS; COMMUTATION OF CURRENT; EQUIPOTENTIAL METHOD; EARTH-RESISTIVITY METHODS; APPARENT RESISTIVITY; ELECTRODE CONFIGURATIONS IN RESISTIVITY METHODS; ELECTRIC DRILLING; ELECTRIC MAPPING; MAPPING BY LINEAR CURRENT ELECTRODES (THEORY); FIELD EXAMPLES OF LINE-ELECTRODE MAPPING; THE "MISE-À-LA-MASSE" METHOD; RESISTIVITY MEASUREMENTS IN BOREHOLES; CHAPTER 7. Induced Polarization Methods , INTRODUCTIONORIGIN OF INDUCED POLARIZATION; THE CONDENSER MODEL; EFFECT OF ALTERNATING CURRENT; TIME-DOMAIN AND FREQUENCY-DOMAIN IP METHODS; MEASURES OF THE IP EFFECT; POLARIZABILITY OF MINERALS AND ROCKS; TWO EXAMPLES OF IP SURVEYS; CHAPTER 8. Gravity Methods; INTRODUCTION; SCOPE OF THE GRAVITY METHOD IN ORE PROSPECTING; SOME DIFFICULTIES; ABSOLUTE AND RELATIVE GRAVITY MEASUREMENTS; GRAVIMETERS; FIELD PROCEDURE; CORRECTIONS TO GRAVIMETER OBSERVATIONS; THE BOUGUER ANOMALY; DENSITY DETERMINATION; INTERPRETATION OF GRAVITY ANOMALIES; KEY VARIABLES OF GRAVITY INTERPRETATION , GRAVITY PROFILES ACROSS SIMPLE STRUCTURES , English

Additional Edition: ISBN 1-322-29260-4

Additional Edition: ISBN 1-4832-3030-9

Language: English

UID:

Format: X, 402 p. 5 illus. , online resource.

Edition: 1st ed. 1986.

ISBN: 9789400941137

Content: Anyone who compares the present thoroughly revised and enlarged edition of this book with the three previous ones, the first of which was published in 1962, may well ask whether the principles of applied geophysics have become more numerous during the last 25 years or so. Such is not the case and the much larger size of the present edition is due to the principles' having been explained in greater detail than heretofore. There are major and minor alterations, additions and emendations, too numerous to be listed here, throughout the book but I would like to draw attention specifically to some of them. The chapter on seismic methods is now far more extensive than before and so are also the chapters on electric and electromagnetic methods. There is also a separate chapter on well logging in oil fields giving the essential ideas. Considering the virtual plethora of available books on seismic methods and on well logging I have not thought it necessary to extend these chapters further. This has enabled me to keep the book to a reasonable length and at the same time retain its fairly comprehensive character. Other features of the present edition are solved examples in the text and the problems at the end of all principal chapters. Answers and hints to the latter are given at the end of the book.

Note: 1 Introduction -- 2 Magnetic methods -- 2.1 Short history -- 2.2 Basic concepts and units -- 2.3 Magnetic properties of rocks -- 2.4 The geomagnetic field -- 2.5 Instruments of magnetic surveying -- 2.6 Survey layout and field procedure -- 2.7 Relative merits of horizontal, vertical and total-field measurements -- 2.8 Qualitative interpretation of magnetic anomalies -- 2.9 Quantitative interpretation -- 2.10 Effect of demagnetization -- 2.11 Some examples of magnetic investigations -- Problems -- 3 Gravitational methods -- 3.1 Introduction -- 3.2 Gravitational field of the earth -- 3.3 Measurement of gravity: absolute and relative measurements -- 3.4 Gravimeters -- 3.5 Field procedure -- 3.6 Corrections to gravity observations -- 3.7 The Bouguer anomaly -- 3.8 Density determinations -- 3.9 Interpretation -- 3.10 Depth determinations -- 3.11 Some theoretical aspects of gravity interpretation -- 3.12 Determination of total anomalous mass -- 3.13 Vertical derivatives of gravity -- 3.14 Illustrations of gravity surveys and interpretation -- 3.15 Note on marine gravity measurements -- Problems -- 4 Electrical methods -- 4.1 Introduction -- 4.2 Self-potential method -- 4.3 Earth resistivity -- 4.4 Some practical aspects of resistivity work -- 4.5 Vertical electrical sounding (VES) -- 4.6 Electrical mapping -- 4.7 Anisotropic earth -- Problems -- 5 Induced polarization -- 5.1 Introduction -- 5.2 Measures of IP -- 5.3 Origin of IP -- 5.4 Electromagnetic coupling -- 5.5 Example of an IP survey -- Problems -- 6 Electromagnetic continuous wave, transient-field and telluric methods -- 6.1 Introduction -- 6.2 Electromagnetic induction -- 6.3 Elliptic polarization -- 6.4 Free-space magnetic fields of low-frequency sources -- 6.5 Near and far fields -- 6.6 Classification of artificial source, continuous wave methods -- 6.7 Near-field CW methods -- 6.8 Far-field methods -- 6.9 Interpretational aids in EM prospecting -- 6.10 Depth penetration -- 6.11 Influence of overburden conductivity -- 6.12 Transient-field methods (time-domain EM) -- 6.13 Influence of magnetic permeability -- 6.14 Controlled-source electromagnetic sounding -- 6.15 Natural-field methods -- 6.16 Airborne measurements -- 6.17 Note on the design of electromagnetic coils -- Problems -- 7 Seismic methods -- 7.1 Introduction -- 7.2 Elastic constants and waves -- 7.3 The reflection method -- 7.4 The refraction method -- Problems -- 8 Radioactivity methods -- 8.1 Introduction -- 8.2 Theoretical background -- 8.3 Radioactivity of rocks -- 8.4 Radiation detectors and field procedure -- 8.5 Radon measurements -- 8.6 Radioactive density determinations -- 8.7 Airborne radioactivity measurements -- 9 Well logging in oil fields -- 9.1 Introduction -- 9.2 Permeable zones -- 9.3Archie's law -- 9.4 Permeability-zone logs -- 9.5 Resistivity and conductivity logs -- 9.6 Porosity logs -- 9.7 Auxiliary logs and measurements -- 9.8 Basic log interpretation procedure -- 10 Miscellaneous methods and topics -- 10.1 Borehole magnetometer -- 10.2 Mise-à-la-masse method -- 10.3 Logging in crystalline rocks and coal fields -- 10.4 Geothermal methods -- 10.5 Geochemical prospecting -- 10.6 Optimum point and line spacing -- 10.7 Position location in airborne surveying -- 10.8 Composite surveys -- Appendices -- Appendix 1 The magnetic potential -- Appendix 2 Magnetized sphere and a magnetic dipole -- Appendix 3 Magnetic anomaly of a sphere -- Appendix 4 Measurement of susceptibility and remanence -- Appendix 5 Magnetic potential of a linear dipole and the anomalies of thin and thick sheets 362 Appendix 6 Demagnetization 'factors' for a rectangular parallelepiped -- Appendix 7 Electric potential -- Appendix 8 Apparent resistivities for dipole-diople configurations -- Appendix 9 Potential of a point current electrode on the surface of a horizontally-layered earth -- Appendix 10 Homogeneous, anisotropic earth (derivation of Eq. (4.73)) -- Appendix 11 Single-turn loop and other topics in electromagnetic methods -- Appendix 12 Acoustic impedance -- Appendix 13 Fourier transforms and convolution -- References -- Answers and hints.

In: Springer Nature eBook

Additional Edition: Printed edition: ISBN 9780412283307

Additional Edition: Printed edition: ISBN 9789400941144

Language: English

DOI: 10.1007/978-94-009-4113-7

URL: https://doi.org/10.1007/978-94-009-4113-7