Butajira geothermal prospect is located in Central Main Ethiopian Rift nearby Westernrnescarpment associated with SDZFZ and geographically bounded between UTM 427000-rn437000E, 882000-891000 N with area coverage of 90 Km2. This is among 23 geothermalrnprospects in Ethiopia which has undergone limited geological and geothermal investigations.rnThe main objective of the study is to assess the existence of promising geothermal systemrncomponents at the Butajira geothermal prospect through investigating the geology andrnsurface geothermal manifestations. To achieve the desired objectives various methodologiesrnwere adopted including review of secondary data, geological field observation, Petrographicrnstudy, and XRD geochemical analysis. As a result, geological and geothermal mapping wasrncarried out at the scale of 1:50,000, promising sites were identified and a preliminaryrnconceptual model was presented to related identified geothermal play type.rnThe main lithological units encompassed in the area are Basaltic Scoria, Basaltic lava flow,rnunwelded Tuff, welded Ignimbrite, Phreatomagmatic deposits comprising rock fragments ofrntrachyte and Diorite as well as alluvial and reworked pyroclastic deposits. Cinder cones,rnCrater Lake, faults, lineaments, fractures, and joints were noticed with general faultrnorientation NNE-SSW, and NE-SW which dip 600-650 SE. Surface geothermalrnmanifestations such as hot spring, mud pool, altered ground, and hot drill well andrnAbandoned well sites were identified. They prominent distributed in the south-west andrnapparently aligned in NE-SW direction around Ashute and Gerbi Ber villages, suggestingrnthey are manifested along fault planes and at their intersection point. Moreover, high degreernof hydrothermal alterations is vigorous predominantly associated with those structures. Thernrecognized mineral assemblage consists of Titanite, Actinolite, Chlorite, Rutile, Albite,rnAdularia, Biotite, Calcite, Quartz, Stishovite, Cristoblite, Trydimite, and, Sulfur.rnA preliminary geothermal conceptual model has been developed which resemble convectiverndominated geothermal play type and consistence with CV1b: Extinct Magmatic Play Type.rnThis accommodates surface manifestations and geological structures and elucidates thernexpected geothermal system components like heat source, reservoir, recharge and dischargernarea, and an impermeable cap rock. Regarding to the local heat source anomaly thatrnexpressed by numerous surface manifestations two possible scenarios could be put forwardrnrelated to the intrusive body. The first one is a series of mantle-derived basaltic dykernintrusions emplaced at shallow depths. The second one is a series of elongate andrninterconnected basaltic sills or magma chambers related to dyke intrusions emplaced beneathrnthe young basaltic scoria cones and lava flows. Alteration minerals and fluid geothermometerrnestimate suggests that the expected reservoir temperature lies between 1500C-2000Crnindicating sufficient heat-generating capability and warrant further exploration work to assessrntheir suitability for energy generation. The source of permeability of the system hasrnapparently related with tectonic structures while impermeable layer found in upper 1kmrndepth resulted from hydrothermal alterations. Hence, two promising areas were identified tornexecute next exploration phase on Ashute and Gerbi Ber villages.