ABSTRACT: Basement metamorphiç rocks in the- Yeşilyurt area are ol Paleozoic age- and consist mainly of mica schist, gneiss and granitic gneiss» Finviatile oetlimieiitary` rocks of Neogene age .`range from, anmature to very immature` and the sandstones are primarily littiie arkose to arkose which are derived from the adjacent matamorptiic complex, -`Sandstone and. conglomerate` were deposited, in an alluvial fan-braided diver environment. One heavy mineral association lias been recognized in Miocene sands from the Yeşilyurt area. Detailed optical .and x-ray diffraction studies revealed that heavy minerals` were derived from the nearby low -grade metainorphic basement. Because no- magmatic, with the exception of metamorphosed granite named here as granitic gneiss, and sedimentary rock types older than, the Miocene sediments are identified In or close to the -study area, the main source of the heavy minerals is from purely metainorphic terrains,,. Thus, the heavy minerals` assemblage typical of metamorphie rocks, seen here is hoped to be an important guide for Meffl.ölica.tî.oıı of unknown source rocks