Abstract: In Attepe, the ore is found within the Cambrien Limestones. Structural control has played an important role in theemplacement of the ore body. The ore has replaced the limestone in a faulted syncline.Primary ore mineral is siderite with lesser amount of hematite. Siderite has almost totaly altered to geothite and limonite,except in few places. Due to this alteration, grade of the ore has increased and impurities have been washed out.The ore minerals, transported in hydrothermal fluids, replaced the limestone. Locally the ore minerals filled the fault zones.The source of the ore bearing fluids is thought to be a deep seated intrusion, which is expressed as a domal structure on the surface.The ore bearing fluids reached the surface by NNE-SSW trending faults.During the exploration activities, 4900 m diamond drill holes have been made, and reserves are estimated as 34 million tonsof iron with a grade 58.44 % Fe, 2.94 % SiO2 and 0.55 % Al2O3.