Abstract: Avcıpınarı sulfide mineralization occurs in the Eocene volcanics which include the basaltic andesites and luffs. The mineralization shows breccia -filling structure and the wall rock is altered tuffs. Mineral paragenesis of this mineralization is py rite (Pyrite I,II and III), marcasite, bravoite, chalcopyrite. sphalerite, galena, fahlore (termantite and goldfieldite), covellite - bornite, malachite -azurite, barite, gypsium and gel - silica. The predominant minerals are idiomorphic pyrite (Pyrite I) forming chemical zoning withbravoite and melnikovil - pyrite (Pyrite HI) wliich shows typical colloform and concentric textures.The wall - rocks, mineral paragensis. structure - texture features and chemcial analysis of the mineralization imply thai the mineralization occurred at the lowest temperature conditions of the hydrothermal process and Ni - Co content in bravoites is derivedfrom the ultramafic rocks.