Methods in Palaeomagnetism
Proceedings of the NATO Advanced Study Institute on Palaeomagnetic Methods, Held in the Physics Department of the University of Newcastle upon Tyne, April 1-10, 1964
Published on 22. October 2013
628 pages
978-1-4832-7499-7 (ISBN)
Description
Methods in Paleomagnetism covers the proceedings of the NATO Advanced Study Institute on Paleomagnetic Methods, held in the Physics Department of the University of Newcastle upon Tyne on April 1-10, 1964. The book focuses on apparatus and techniques used in paleomagnetism and rock magnetism. The selection first offers information on sampling techniques in the field and measurement of natural remanent magnetization. Discussions focus on ballistic and spinner magnetometers; paleomagnetic sampling with a portable coring drill; portable apparatus for collecting small oriented cores; and portable field-sampling equipment. The book also takes a look at procedures to test the stability of magnetization, as well as physical properties of demagnetization; thermal demagnetization by the continuous method; and apparatus for thermal demagnetization by the progressive method. The text ponders on measurement of isotropic and anisotropic susceptibility and magnetic measurements in applied fields. Topics include preliminary account of a refined technique for magnetic susceptibility anisotropy measurement of rocks; errors in anisotropy measurements with the torsion balance; and measurement of the anisotropy of the susceptibility with an astatic magnetometer. The selection is a valuable reference for readers interested in paleomagnetism.
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Content
PrefaceList of ContributorsChapter 1. Sampling Techniques in the Field Notes on Rock Sampling for Paleomagnetic Research The Collection and Orientation of Rock Samples The Use of the Sun Compass Methods of Sample Collection and Orientation for Archeomagnetism Paleomagnetic Sampling with a Portable Coring Drill Advantages of Field Drilling of Samples for Paleomagnetic Studies Portable Apparatus for Collecting Small Oriented Cores Portable Field-Sampling Equipment A Large Sampling DrillChapter 2. Measurement of Natural Remanent Magnetization Section I. Astatic Magnetometers The Design and Construction of Astatic Magnetometers The Astatic Magnetometers at Newcastle upon Tyne The Astatic Magnetometers at De Bilt The Dominion Observatory Astatic Magnetometer The Astatic Magnetometers Constructed in Paris The Astatic Magnetometer at the Sedgwick Museum, Cambridge Two Astatic Magnetometers with Variable Sensitivity Recent Improvements Carried Out on Astatic Magnetometers An Automatic Astatic Magnetometer Preliminary Evaluation of a New Resonance Magnetometer The Resonance Magnetometer Section II. Ballistic and Spinner Magnetometers Principles of The Ballistic Magnetometer for the Measurements of Remanence Design of Spinner Magnetometers The Spinner Magnetometer at Salisbury The Spinner Magnetometer at Newcastle upon Tyne A Spinner Magnetometer for Igneous Rocks Design of a Transistorized Portable Air-Turbine Spinner Magnetometer A "Big Sample" Spinner Magnetometer Calibration of the Spinner Magnetometer Section III. Fluxgate Magnetometers Measurement of N.R.M. with Fluxgate Unit Measurement of Natural Remanent Magnetization at the Outcrop Section Iv. Principles of Measurement The Magnetization of Rock Samples Methods of Measurement with the Astatic Magnetometer Shape and Size of Weakly Magnetized Rock Specimens Analysis of Spinner Magnetometer OperationChapter 3. Procedures to Test the Stability of Magnetization Field Tests for Stability Physical Principles of Demagnetization The A.C. Demagnetization Technique Computations of the Behavior of Two- and Three-Axis Rotation Systems A 500 C/Sec Alternating Field Demagnetizing Apparatus Analysis of Alternating Field Demagnetization Equipment A.C. Demagnetization of Rocks: Analysis of Results Thermal Demagnetization by the Continuous Method Apparatus for Thermal Demagnetization by the Progressive Method Thermal Demagnetization Apparatus at Paris A "Big Sample" Spinner Magnetometer and Demagnetizing Oven Chemical DemagnetizationChapter 4. Presentation and Analysis of Data Statistics of a Spherical Distribution Distortion Patterns of Projections and Simple Methods of Constructing Oblique Cases Statistical Discussion of Magnetization of Rock Samples Analysis of Paleomagnetic Data On Estimating Secular Variation From Paleomagnetic DataChapter 5. Measurement of Isotropic and Anisotropic Susceptibility The Anisotropy of Magnetization of Rocks Measurement of Initial Susceptibility with the Astatic Magnetometer The Measurement of Anisotropy of the Susceptibility with an Astatic Magnetometer An Instrument for the Measurement of Isotropic Initial Susceptibility of Rock Samples An Anisotropy Meter Torsion-Balance Method of Measuring Anisotropic Susceptibility Errors in Anisotropy Measurements with the Torsion Balance Use of the Spinner Magnetometer for Anisotropy Measurements The A.C. Bridge Method Preliminary Account of a Refined Technique for Magnetic Susceptibility Anisotropy Measurement of Rocks Anisotropy Measurements with a Translation InductometerChapter 6.
