Articles | Volume 10, issue 9
Methods for assessment of models
28 Sep 2017
Methods for assessment of models |  | 28 Sep 2017

Ellipsoids (v1.0): 3-D magnetic modelling of ellipsoidal bodies

Diego Takahashi and Vanderlei C. Oliveira Jr.

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Cited articles

Allmendinger, R., Cardozo, N., and Fisher, D. M.: Structural Geology Algorithms: Vectors and Tensors, Cambridge University Press, 2012.
Austin, J., Geuna, S., Clark, D., and Hillan, D.: Remanence, self-demagnetization and their ramifications for magnetic modelling of iron oxide copper-gold deposits: An example from Candelaria, Chile, J. Appl. Geophys., 109, 242–255,, 2014.
Blakely, R. J.: Potential theory in gravity and magnetic applications, Cambridge University Press, 1996.
Chang, H.: Fields external to open-structure magnetic devices represented by ellipsoid or spheroid, British Journal of Applied Physics, 12, 160–163,, 1961.
Clark, D.: Self-Demagnetisation in Practice: the Osborne Cu-Au Deposit, Preview (Magazine of the Australian Society of Exploration Geophysicists), 31–36, 2000.
Short summary
Ellipsoids are the only bodies for which the self-demagnetization can be treated analytically. This property is useful for modelling compact orebodies having high susceptibility. We present a review of the magnetic modelling of ellipsoids, propose a way of determining the isotropic susceptibility above which the self-demagnetization must be considered, and discuss the ambiguity between confocal ellipsoids, as well as provide a set of routines to model the magnetic field produced by ellipsoids.