Gravity Variations across Nakaporon Fault in Korosi Geothermal Prospect Field

Abstract

Study of the alignment of faults is important since faults play a major role in mineral, petroleum, geothermal and hydrogeological distribution. In this study, gravity survey in the target region was conducted by the use of Sodin gravity meter to detect variations in density of the rocks across Nakaporon fault in Korosi geothermal prospect field. A total of 68 gravity stations were surveyed across Nakaporon fault. Data was processed to remove all other effects not related to the subsurface density changes.  Using surfer software, a grid and contour map was created and then sliced to obtain three gravity profiles that were oriented across the anomaly. From the three profiles, it was established that eastern side had high gravity and displaced upward while the western side had lower gravity and displaced downward forming a normal fault that ran in the NNE direction.