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Asymptotic Anomalies of Uniform Thin Polygonal Sheets
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 4th EAGE St.Petersburg International Conference and Exhibition on Geosciences - New Discoveries through Integration of Geosciences, May 2010, cp-156-00116
- ISBN: 978-90-73781-79-5
Abstract
Thin planar sheets are useful gravitational and magnetic models of dykes and veins, treated as two-dimensional geophysical structures on the survey scale of a 3D geological environment. We show that the thin-sheet anomaly formulae are numerically more stable than the corresponding formulae for a finitely thick poyhedral target. We also demonstrate the possibility of finding versions of the thin-sheet formulae that are absolutely stable with respect to increasing target distance to target size ratio, though this stability is obtained at the expense of extra numerical complexity.