SOIL GAS RADON MEASUREMENTS AS A TOOL TO IDENTIFY PERMEABLE ZONES AT LAS PAILAS GEOTHERMAL AREA, COSTA RICA

Abstract

Soil gas radon measurements were performed at Las Pailas geothermal area using a real time electronic radon detector (Durridge Model Rad 7). The statistical analysis of the 259 collected data shows at least four populations, with background values measured below 140 pCi/l. Some of the anomalies are located in the intersection of structures or between them, suggesting permeable zones associated with those features.