General Discussion on Metallogenitic Tectonic Setting of Beishan Mountain, Northwestern China

Beishan mountain area can be devided by Hongliuhe-Niuquanzi-Xichangjing ophiolite belt into two parts: Xingxingxia-Mingshui-Hanshan micro-plant and Dunhuang micro-plant.In Ordovician ocean basin and back-arc basin,volcano-sedimentary type copper-zinc minerals can be formed; in passive continental margin,lead-zinc minerals are hosted in volcano-sediment rock system.Silurian-Devonian island-arc volcanic formation may be hosted in rock full of porphyry copper deposits.The volcano-sedimentary type iron minerals may occur in Carbon iferous-Permian continental rift sedimentary formation,porphyry copper deposits and copper-nickel deposits of basic rock type.The palaeocontinun t crustmelting type granite mass is metallogenetic matrix of W,Sn,rare metal deposits.