Gravity anomalies are sensitive to variations in size, depth and composition of anomalous
sources. A suitable approach to detect and estimate spatial locations and depth is the Normalized Full
Gradient (NFG) method. The NFG in cross-section or maps manifest clearly the depth of the centers or top
of the anomalous bodies at certain harmonic numbers. The obtained results from synthetic data, with and
without random noise, show closed maxima on an NFG map that indicate the spatial locations of the
centers and depth of the causative bodies. Modeling studies show that the estimated depth largely depends
on the harmonic number used to calculate the NFG, which are closely related to the profile lengths and
gravity griding intervals. In this study, the NFG method is applied to Mobrun sulfide body in Canada for
estimating the depth to the top of it. The NFG closed maxima alongside the borehole data, shows that the
Mobrun ore body is located in shallow depths, about 17 meters and extended to 175 meters, approximately.