The Yavu gold-silver project is located in Yavu District, Sivas Province, Turkey (Figure 1). This project area is covered by three mining licenses owned by OGM Mineral Corporation (Figure 2). The project is approximately 450 kilometres east of Ankara, the capital city of Turkey, and 50 kilometres west of Sivas, one of the most important mineral provinces of Turkey. Yavu gold-silver mineralization has been described for the first time.
The host rocks are formed the schist and gneiss of the Akdağmadeni metamorphics and volcanic series. Ore minerals observed include gold, silver, chalcopyrite, pyrite, arsenopyrite, malachite, azurite. Precious metals such as gold and silver enrichments are located along the fractures in metamorphic rocks and volcanic series in the quartz veins and veinlets that cut the metamorphic rocks as disseminated, stockwork and fault crack filling. The host rock alteration is composed of kaolinization and strong silicification. OGM Mineral Company initially identified three primary orogenic deposit zones in target zones within a broad 6.2 by 6.0 kilometre area as a conclusion of gold-silver general geochemistry. The three target zones are Yavu, Killik and Kücükakören area are named. However, the projects are collectively named Yavu Gold-Silver Project. The surface expression of the veins and silicified zones range from 0.5 to over 85 meters in thickness, and 50 to 200 meters in length. The host rocks included some textural characteristics of the orogenic-mesothermal and low sulphidation epithermal type deposit. In conclusion of some geochemical analysis, all host rocks show grades of gold between 0.37 ppm and 11.3 ppm@3m., and silver grades between 0.05 ppm and 117.5 ppm @5m. The system has characteristics of orogenic-mesothermal formation and low sulphidation epithermal processes for the genesis of the gold-silver and base metal mineralization.