INVERSION OF GRAVITY ANOMAY TO COMPUTE 3D GEOMETRY OF DENSITY INTERFACE

Abstract

In this dissertation work Parker—O!denberg iterative method has been used to produce the3D geometry of a horizontal density interface from gridded gravity anomaly. This procedure is based on a relationship between the Fourier transform of the gravity anomaly and the sum of the Fourier transform of the interface topography. Given the mean depth of the density interface and the density contrast between the two media, the 3D geometry of the interface is iteratively calculated. A high-cut filter in the frequency domain has been incorporated to enhance the convergence in the iterative process. The Parker-Oldenberg technique is capable of taking large data sets. The inversion of a gravity anomaly over Pannonian basin of central Europe and Brittany (France) has been presented as case study to compute the Moho depth as practical examples.