Surface Hydrothermal Alteration in the Tulu Moye Area, Lakes District Rift, Ethiopia

Abstract

Tulu Moye Geothermal Prospect is located in the Ethiopian Rift Valley, which is part of the Great African Rift system. Tulu Moye area is characterized by silicic centers and basalt lava flows ranging in age from Pleistocene to Historic times. It is affected by NNE-SSW trending faults, which is intersected y transverse NNW -SSE faults. The surface hydrothermal manifestations are mainly warm and hot teaming grounds with an extensive area of altered ground. The XRD analyses suggest the mineral assemblages of kaolinite, tlidimyte which correspond temperature less than 100