Geophysics Department, Faculty of Science, Cairo University, Giza, Egypt.

ABSTRACT

In this paper, we have used the window curves method to simultaneously determine the shape factor and the depth of a buried structure from third moving average residual gravity anomalies. The method involves using a relationship between the shape factor and the depth to the source, and a combination of windowed observations. This method can be applied not only to “true residuals” but also to the Bouguer gravity data consisting of the combined effect of a residual component due to a purely local structure and a regional component represented by a deep-seated structure. The method is applied to theoretical data with and without random errors and tested on a known field example from the U.S.A. In all cases, the shape and depth solutions obtained are in good agreement with the actual ones.

Keywords: gravity interpretation; third moving average method; window curves.