Abstract: As the copper ,and pyrite deposits of the Eastern Pontus ore province are known to be structurally controlled, structural characteristics of the sulphide veins ,and the Fe, Mn ,and Cd content ,and the distribution of theseelements in sphalerites of Southern Bulancak area (Giresun, Turkey) were investigated ,by means of detailed geologicalstudies ,and electron microskobe analysis.It is shown that lûKrieh sphalerites lie on a NW-SE trending zone while Fe, trending zone. These trends correlatewith two dominant fracture systems in the area. The low F,e-Content of the dark brown, black coloured sphaleritesshow no direct relationship between the colour ,and the iron content.