Gravimagnetic Anomaly Formulae for Triangulated Homogeneous Polyhedra

E023 Gravimagnetic Anomaly Formulae for Triangulated Homogeneous Polyhedra H. Holstein* (University of Wales Aberystwyth) E. Sherratt (University of Wales Aberystwyth) & C. Anastasiades (University of Wales Aberystwyth) SUMMARY Approximation of a homogeneous target by a polyhedron is useful in gravity and magnetics modelling since shape approximation can be arbitrarily close while retaining a closed form solution for the anomaly. Shape approximation by triangular facets is particularly versatile allowing individual vertices to be moved without compromising facet planarity. We show that triangular facets in fact allow a more efficient implementation and enhance the numerical stability of anomaly formulae compared to their