Late Paleozoic crust accretionary of east Tianshan and metallogenic evolution, Xinjiang, NW China

Crust accretion and mineralization is the research on the frontier of economic geology. The eastern Tianshan orogenic belt is key part of the central Asia orogenic belt, its late paleozoic crust evolution has experienced subauction accretion, collision and large scale strike-slip, different stage has occurred many metal deposits. Copper-(nickel) deposits in the eastern Tianshan have been assigned to four major types according to the tectonic setting in which they formed. These are: 1) pre-accretionary late Devonian-early Carboniferous porphyry-type Cu-Mo-Au-Ag deposits: 2) early Carboniferou pre-accretionary VMS Fe-Cu-Pb-Zn massive sulfide deposits: 3) syn-to post-accretionary Late Carboniferous-Early Permian magmatic Cu-Ni-sulfide deposits: and 4) post-accretionary Late Carboniferous-Early Permian orogenic Au-Cu deposits. The geodynamics processes of these deposits is related to the crust horizontal and vertical accretions. The eastern Tianshan domain has been the one of the most important metal deposits pro