An improved Naudy-based technique for estimating depth from magnetic profiles

Abstract

Techniques for automatic determination of the depths of sources from magnetic profiles represent fast and inexpensive interpretation tools. The automatic technique proposed by Naudy is widely used. This technique requires accurate locations of the centers of anomalies in order to obtain reliable final estimation of the depths. In the proposed improvement in the Naudy technique, the total magnetic fields on the profiles are split into horizontal and vertical components. It is demonstrated that this procedure leads to accurate locations of the centers of anomalies. Final estimates of the depths are less ambiguous and agree well with data obtained from drilling. Application of the Naudy technique to vertical gradient data is discussed.