PERMO-TRIASSIC MINERALIZATION IN ASIA AND ITS RELATION TO PLUME MAGMATISM
A.S. Borisenko, V.I. Sotnikov, A.E. Izokh, G.V. Polyakov, and A.A. Obolensky
United Institute of Geology, Geophysics and Mineralogy, Siberian Branch of the RAS,
3 prosp. Akad. Koptyuga, Novosibirsk, 630090, Russia
Keywords: Metallogeny of areas of plume influence, age boundaries, Siberian and Tarim mantle plumes
Pages: 170-186
Subsection: PETROLOGY, GEOCHEMISTRY, AND ORE FORMATION
Abstract
A specific complex of different types of mineralization (early Cu-Ni-Pt and Ni-Co-As and late Hg, Au-Hg, and porphyry Cu-Mo) has been revealed in the areas of influence of the Siberian and Tarim mantle plumes. In some regions, Mo-W, Sn-W, Ag-Sb, hydrothermal Fe-skarn, Fe-Ti (apatite), REE-Ta-Nb-carbonatite, and other types of mineralization have been found. The central parts of the areas host large Cu-Ni-Pt deposits, whereas the peripheries are made up of Ni-Co-As, Hg, Au-Hg, and Cu-Mo ores. In some ore districts, the largest commercial deposits are confined to rift structures or deep-fault zones. Formation of large ore deposits was determined by the spatial co-occurrence of plume magmatism and within-plate rifting and the active mantle-crust interaction.
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