The elevated temperature is enough to drive dissolution of host rock and ion exchange reaction in the reservoir of the geothermal system that modify chemical composition of reservoir and thermal springs water to Na-Cl-SO 4-HCO3 facies from recharged Ca-Mg-HCO 3 water type.
Hitastig vatnsins hefur áhrif á efnafræðilegt samspil vatns og bergs.