Abstract: There are two kinds of gold-deposit formations within Caledonian foldsystem in the southwest of Siberian platform:a. Gold-sulfide-quartz forma tion; b. Gold-skarn forma tion. They are formed in geodynamic tectonic surroundings of ancient island arc, usually occured in the zone of ophiolitic formation and related with proto -plutonic granitoid rocks in genesis. Associated elements of the ore, Cu, Pb and Zn, are 10-20 times as much as that of wall rocks. As, Sb, Mo, W, Bi and Te etc. may act as indicator for industrial orebody.