International Journal of Engineering & Technology IJET-IJENS Vol:13 No:01
A Soil Gas Radon Survey to Determine Fault at Southern Part of Rajabasa Geothermal Field, Lampung Indonesia
Nandi Haerudin, Wahyudi, Suprajitno Munadi, Wiwit Suryanto
A soil gas survey for radon was carry out at the southern part of Rajabasa geothermal field, Lampung Indonesia. Survey area included 5.25 km2 and choosed 56 measurement point that was range 250 – 350 m spacing distance. The Radon concentration was measured by Scintrex Radon detector RDA 200. The result of radon soil gas survey performed high radon concentration in the three manifestations wich was included survey area; those are 123 cpm in Gunung Botak hot spring, 145 cpm Kunjir fumarole and 76 cpm Bulakan (Cugung) fumarole. Three manifestation connected by two fault that were the fist went from Gunung Botak tended west-southwest to east-northeast direction through Kunjir and the other went from south-southwest to north-northeast accros the fist line to Bulakan fumarole.