Why the Geochemical Diversity of CO2-Bearing Groundwaters in Crystalline Massifs Occurs

The diversity of geochemical types of CO2-bearing waters in crystalline massifs of similar mineralogical and petrogra- phic composition in water–rock systems is due to the influence of the following physicochemical parameters: chloride type - mainly high Rock/Water mass ratio (R/W); carbonate type - joint action of low Rock/Water mass ratio (R/W) and high CO2 partial pressure (PCO2); sulfate type - joint action of high Rock/Water mass ratio (R/W), CO2 partial pressure (PCO2), and temperature.