MAPING OF GRAVITY FIELD OF LIBYA BY USING UPWARD CONTINUATION METHOD

Abstract

The new Technology of the space age (satellite gravimetry missions) in last two decades has shown the efficacy measurements at the space to produce a global and regional map of earth's gravity field in more accuracy and details to improve our knowledge of gravity field. Modeling of gravity data is used extensively in both geology and exploration geophysics to illustrate the geometry and interference between the sediment and bed rock. Various methods are to illustrate the bed rock topography, and one of those methods, which will describe and be used in the present paper, is called upward continuation. This method is used in exploration geophysics to estimate the value of potential (gravity) field. The principal of this method is based on removing the residual gravity anomaly which in reality shows the local effect of bedrock gravity on the observed gravity. It should be noted that some software like Surfer 19 are used in this paper, but the main program is written in Fortran 90. In order to show the capability of the program, real data from Satellite Gravity is used, to present calculation results wherever possible to geophysical map display.