Geothermal Play Types along the East Africa Rift System: Examples from Ethiopia, Kenya and Tanzania

Based on geophysical, geological and geochemical investigations carried out in the last decade, we reviewed three major geothermal plays that well represent different structural, volcanological hydrogeological realms can be encountered East African Rift System (EARS). Alalobeda (Ethiopia) Menengai (Kenya) are examples of typical Eastern Branch EARS. The former is a fault-leakage-controlled play located graben structure. heat source likely deep-seated, widespread magmatism, associated with lithosphere thinning regionally affects this area. reservoir temperature water-dominated system ranges from 185 to 225 °C. classified as convection-dominated magmatic type. could intrusion beneath caldera. A shallow, liquid-dominated (with temperatures 150–190 °C) an intermediate-deep reservoir, hosting steam liquid 230–340 °C), were detected. Kilambo-Ilwalilo (Tanzania) example Western It half-graben realm where regional fault controls ascending groundwater flow. Reservoir about 110–140 °C, provided by thinning. results study provide helpful guidelines for future studies resources rift.