The Olkaria geothermal system in Kenya is located within the Olkaria volcanic complex in the central sector of the Kenya Rift Valley. Reykjanes, Svarstengi and Nesjavellir geothermal fields are located in southwest Iceland. These are high temperature geothermal systems with temperatures <240°C. Speciation calculations indicate that in Olkaria CO2 partial pressures range between 0.5 bar and 5 bar except in the Olkaria West sector with ...