Some aspects in inversion of potential field data: a damped approximate inverse approach

Abstract

The mathematical details and underlying principles for the damped approximate inversion technique are briefly discussed. The damping factors and relative threshold are optimally selected so that a maximum of useful information is utilised in retrieving the model parameters. This technique is tested for synthetically generated data across a two-dimensional hexagonal body for the initial parameters off by — 10% to 25% of the true parameters, number of corners and mixed variants. The degree of uniqueness in resolving the parameters is studied from the resolution matrix, eigenvalues, damping factors and V-matrix. Two field examples, a Bouguer gravity anomaly profile from the Banovce basin and a total intensity magnetic anomaly profile from the Bijawar basin, demonstrate the effectiveness of the scheme.