| Abstract |
Most thermal waters in Korea are between 25 and 30?C, dilute (200-400 mg/l TDS), and richer in sodium, bicarbonate, silicate, and fluoride than the shallow ground waters. Generally, the thermal waters are associated with Cretaceous or Jurassic granite. Heat for these thermal waters is obtained during deep circulation in the fractured granites and is not related to volcanic or tectonic activity. Isotopic data indicate that the geothermal waters originate as local meteoric water. None of the thermal waters show any oxygen shift. Temperature-chloride relations show no evidence for mixing. |