Radon studies for extending Los Azufres geothermal energy field in Mexico

Los Azufres is a 98 MW producing geothermal energy field situated in the Me xican volcanic belt at the west part of the country. Recently, hydrothermal activity and geochemical analysis of geothermal fluids from the north part of the geothermal field gave indications of a possible geothermal-producti on area, similar to the already producing field. In order to investigate the activity of geological structures,which are con sidered the means of geothermal fluids transporters, radon mapping was carr ied out using sets of 240 LR-115 detectors in the area of interest. Radon v alues higher than 10 kBq m(-3) were considered anomalous and indicative of geothermal anomalies.