SPECTRAL-ANALYSIS OF GRAVITY-ANOMALIES CAUSED BY SLAB-LIKE STRUCTURES- A HARTLEY TRANSFORM TECHNIQUE

The spectral analysis of gravity anomalies due to slab like structures with linearly varying density using the Hartley transform, a real val ued replacement for the well known complex Fourier transform which is conventionally used in such an analysis, is presented. Being a real va lued function, it has specific advantages in terms of computation time , memory and interpretation compared to its progenitor, the Fourier tr ansform. The method is illustrated with a theoretical example and fiel d example from across the mid-oceanic ridge, i.e. ninety east ridge co rresponding to latitude 5 degrees N and 5 degrees N and longitude 80 d egrees E and 120 degrees E. The results of both the theoretical and pr actical examples agree well with those of the other conventional metho ds. (C) 1998 Elsevier Science B.V.