讨论北祁连山石居里沟富铜矿床成矿特征 ,通过分析认为 :成矿环境为中奥陶世弧后扩张脊 ;容矿岩石为蛇绿岩套上部火山岩或火山—沉积岩系 ;矿体赋存部位受海底裂隙系统的控制 ;含矿热液起源于海水与玄武岩在高温下的反应 ,成矿金属元素主要来自火山岩 ,矿化剂硫来自二者。 This paper discusses the mineralization characteristics of the Shurizigou copper-rich ore deposit in the North Qilian Mountains. According to the analysis, it is concluded that the metallogenic environment is the Middle Ordovician back arc extension ridge, the ore-hosting rocks are ophiolitic upper volcanic rocks or volcano-sedimentary rocks, The deposit site is controlled by the seabed fracture system. The ore-bearing hydrothermal fluids originate from the reaction between seawater and basalt at high temperature. The metallogenic elements mainly come from volcanic rocks and the mineralized sulfur comes from both.