Gravity data, regional – residual separation

Abstract

The separation of regional and residual components from the observed Bouguer gravity (and magnetic) anomaly has remained a subject of debate over the past six to seven decades. Starting from simple graphical to model-based estimation of regional, both in space and frequency domain, the expected uniqueness has not been achieved. This is due to human judgment and mathematical as well as geological assumptions. With this backdrop, a new concept based on finite element theory is described that performs as good as or often better than the existing techniques both in frequency and space domains. This has been demonstrated with two examples. FEA technique is not site specific and can be universally used.