Syn- and post-orogenic Cu mineralization in the northern Xinjiang Paleozoic accretionary and collisional orogenic belt in northwestern China is of great economic interest. About 40 Cu-bearing deposits have been discov...
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Syn- and post-orogenic Cu mineralization in the northern Xinjiang Paleozoic accretionary and collisional orogenic belt in northwestern China is of great economic interest. About 40 Cu-bearing deposits have been discovered in the area,making it one of the most important metallogenic belts in *** to their host rocks,these deposits can be classified into four principal types:(1) volcanic-hosted massive sulfide Cu-Pb-Zn deposits;(2) porphyry Cu-Mo-(Au) deposits;(3) magmatic Cu-Ni sulfide deposits;and(4) Cu-Mo-Au-Ag skarn ***,the development of these Upper Paleozoic deposits was closely associated with subduction and collision of the ancient Asian Ocean between the Siberian Block and the Tarim *** important metallogenic epoch involving formation of Cu-Pb-Zn-polymetallic deposits formed during southwestern rollback and associated slab-detachment during Devonian time(400-370 Ma).In southern Altay,southwestern-direct rollback and associated slab-detachment occurred during the Devonian(400-370 Ma),in response to later collision at the accreted continetal margin[Xiao,W.J.,Windley,B.F.,Badarch,G.,Sun,S., Li,J.L.,Qin,K.Z.,Wang,Z.H.,*** accretionary and convergent tectonics of the southern Altaids:implications for the lateral growth of Central *** of the Geological Society of London 161,339-342],during which the Ashele Cu-Pb-Zn and Keketale Pb-Zn deposits *** led to the accretion of the Junggar Ocean arc system in the Middle *** the Lower to Middle Carboniferous,north-dipping subduction beneath the Dananhu arc triggered the emplacement of granitic porphyries in the Tousuquan and Dananhu island arc belt in the east Tianshan,leading to the formation of the Tuwu and yandong porphyry Cu-Mo-Au-Ag *** the Upper Carboniferous to Lower Permian,large mafic-ultramafic complexes were emplaced during closure of the ancient Tianshan Ocean,resulting in the formation of several magmatic Cu-Ni sulfide deposi
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