This thesis presents methods for processing and interpreting magnetic gradient tensor data, new approaches to estimation of source magnetisations from analysis of magnetic anomalies, and improved geological interpretation of magnetic surveys using magnetic petrological principles and predictive magnetic exploration models. The thesis emphasises the importance of an approach that integrates an understanding of the geological processes that create and destroy magnetic minerals with extra information obtained from magnetic gradient tensor data, and with petrophysical and palaeomagnetic information, to derive better geological models and to improve exploration success.
Table of Contents1. Introduction -- 2. Utility of magnetic tensor gradiometry and properties of the magnetic gradient tensor -- 3. New methods for interpretation of magnetic vector and gradient tensor data I: Eigenvector analysis and the normalised source strength -- 4. New methods for interpretation of magnetic vector and gradient tensor data II: application to the Mount Leyshon anomaly, Queensland -- 5. Interpretation of the magnetic gradient tensor and normalized source strength applied to the Tallawang magnetite skarn deposit, New South Wales, Australia -- 6. Correction of electric and magnetic fields and gradients measured within and around an insulating sensor capsule in seawater -- 7. New approaches to dealing with remanence: magnetic moment analysis using tensor invariants and remote determination of in situ magnetisation using a static tensor gradiometer -- 8. Methods for determining remanent and total magnetisations of magnetic sources - a review -- 9. Magnetic effects of hydrothermal alteration in porphyry copper and iron-oxide copper-gold systems: a review -- 10. Conclusions.
Notes"A thesis submitted for the degree of Doctor of Philosophy".
Includes bibliographical references
Thesis by publication.
Awarding InstitutionMacquarie University
Degree TypeThesis PhD
DegreePhD, Macquarie University, Faculty of Science and Engineering, Department of Earth and Planetary Sciences
Department, Centre or SchoolDepartment of Earth and Planetary Sciences
Year of Award2014
Principal SupervisorMark Lackie
Additional Supervisor 1Richard Flood
RightsCopyright David Alan Clark 2014
Copyright disclaimer: http://mq.edu.au/library/copyright
Extent1 online resource (vi, 344 pages) illustrations