Magnetic and gravity anomalies of a triaxial ellipsoid

Abstract

The theoretical background, a computational algorithm and an HP41CX calculator program for forward modelling of magnetic and gravity anomalies due to ellipsoidal bodies are presented, including gravity effects of prolate and oblate ellipsoids of revolution and two-dimensional elliptic cylinders. The ellipsoid is particularly useful for modelling strongly magnetic, compact orebodies, because of the flexibility and appropriateness of the geometric form and, in particular, because ellipsoids are the only bodies for which self-demagnetization can be treated exactly and analytically. Remanence, anisotropic susceptibility and self-demagnetization are all included in the analysis.