Gravity Analysis for Geothermal Reconnaissance in Costa Rica

Two geothermal fields in Costa Rica were investigated by gravity surveys in an attempt to delineate their subsurface structures. The surveys improve the understanding of the relation between the geothermal systems and subsurface structure. The gravity data are analyzed using integrated gradient interpretation techniques such as the Horizontal Gradient (HG) and Euler Deconvolution methods. With these techniques, many faults are detected and compared with those found in the surface geology. The results of this study lead to a better understanding of the geothermal system in the study area and may aid in future geothermal exploration.