36Cl Age Study for Deep Geothermal Water of Guanzhong Basin

There are abundant geothermal water resources in the deep of Guanzhong Basin, whose origin and renewable ability has been the focus of academic circles. Previous research results of the environmental isotope hydrogeochemistry showed that there was small amount residual sedimentary water formed in the geological time in the deep geothermal water of study area, which was directly related to the sustainable development and utilization of geothermal resources. So this paper uses Cl-36 to study the age of deep groundwater. The results of Cl-36 age show that the biggest age of deep groundwater of Guanzhong Basin is 988.69 similar to 1123.98ka. Geothermal water with different tectonic units, different closed condition and different genetic types has different Cl-36 age.