3D magnetic inversion for total magnetization in areas with complicated remanence
Peter G. Lelièvre, Douglas W. Oldenburg, Nigel Phillips
Abstract
Peter G. Lelièvre, Douglas W. Oldenburg, Nigel Phillips
Abstract
Inversion of magnetic data is complicated by the presence of remanent magnetization. To tackle this problem we design a methodology for inverting magnetic data for subsurface magnetization, as opposed to magnetic susceptibility. Our approach contains flexibility to obtain different types of magnetization models and the inversion routine is appropriate for use on data that contains the response of material exhibiting remanence. The magnetization is split into one component parallel (or anti-parallel), and two components perpendicular, to the Earth's field. Finding a vector magnetization greatly increases non-uniqueness but additional information, such as bounding the parallel component of the magnetization, can help produce useful results.
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Inversion of magnetic data is complicated by the presence of remanent magnetization. To tackle this problem we design a methodology for inverting magnetic data for subsurface magnetization, as opposed to magnetic susceptibility. Our approach contains flexibility to obtain different types of magnetization models and the inversion routine is appropriate for use on data that contains the response of material exhibiting remanence. The magnetization is split into one component parallel (or anti-parallel), and two components perpendicular, to the Earth's field. Finding a vector magnetization greatly increases non-uniqueness but additional information, such as bounding the parallel component of the magnetization, can help produce useful results.
Key concepts: Remanence, Magnetization, Stoner–Wohlfarth model, Single domain, Inversion (geology), Condensed matter physics, Magnetic domain, Demagnetizing field