ABSTRACT
Hamedan (Faghireh) antimony deposit is located in the west of Iran relating to Alvand Granitoids. The mineralization occurs as a series of veins. Thickness of the veins is variable and reaches up to 1 m. The veins are emplaced along high angle faults. These faults were ways for migration of ore forming fluids. Mineralization is constituted of stibnite, pyrite, realgar and orpiment with quartz as a gangue. The veins are of the open-space-filling type with zones of brecciation. Monzogranites which formed the most part of Alvand Pluton are the host of the veins. Monzogranites consist of quartz, oligoclase, orthoclase, biotite and subordinate muscovite. The veins have average contents of 30% antimony, 0.8 ppm gold and 500 ppm arsenic. According to geochemical studies there are anomalies of Sb, Au, As, Ag, Hg, Sn, Ni, Co and Cr in the host rocks. Spider diagrams show a gentle decrease from La to Lu for host rocks and veins, and have some similarities but any comparing between them needs more evidences.
