A METHOD OF DENSITY DETERMINATION FOR GRAVITY CORRECTION

A Bouguer anomaly value B is evaluated from a measured gravity value. The authors first consider a smoothed profile of Bouguer anomaly which would be virtually obtained by dividing the area of interest into a series of meshes of equal size. Results suggest that a larger mesh size is associated with a lower estimate of density. A reduction of mesh size, on the other hand, may lead to a threshold mesh size at which Bouguer anomaly profile loses any correlation in each mesh with the corresponding topographic prolife as the former is considered to be much smoother than the latter. The threshold mesh size and the true density may be obtained by plotting an estimated density as a function of mesh size.