Radon Gas Variations in Soil Gas on Ilgın Active Fault Zone, Konya, Turkey

Soil gas radon concentrations have been studied in an active fault zone of Ilgın, Konya, Turkey. At this seismically active fault zone 20 km long, 3-5 km width in the study area there are two faults and a graben in between them. The maximum radon and thoron concentrations are 32601 Bq/m3 and 17628 Bq/m3 , while the minimum values are 170 Bq/m3 and 103 Bq/m3 respectively. At 15 sampling points for radon the obtained values are higher than the average values. There has been a clear visibility of both 222Rn radon and 220Rn thoron anomalies in the area. The 222Rn and 220Rn have no positive or negative correlation at sampling points in the field.