Abstract: The Yincan copper deposit located in an island arc belt which stretches from the north slope of South Mountains, Hexi corridor to Lenglong Mountain on North Qilian Orogen. A set of bimodal volcanic sedimentary formation distributed in the mining area. The ore-bodies occurred in the quartz keratophyre with obvious vertical mineralization zoning, the copper orebodies occurred at the top, and the zinc orebodies occurred at the bottom. The ore in this study was a pyrite-type polymetallic ore. The mineralization was directly or indirectly associated with volcanic activities, the deposit was a typical volcanic hosted massive sulfide type and formed in early Paleozoic on North Qilian Orogen.