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UDC (553.41:553.491):551.72(470.55/.58) NOBLE METAL SPECIALIZATION OF THE LOWER AND MIDDLE RIPHEAN TERRIGENOUS ROCKS OF THE BASHKIR ANTICLINORIUM (SOUTH URALS)
A. V. Maslov, S. G. Kovalev
The Bashkir anticlinorium constituted by the upper Precambrian sedimentary and volcanogenicsedimentary formations subdivided into Burzyanian, Yurmatian and Karatausky (standard subdivisions of Riphean) and the Asha group (Vendian) is one of the largest structures of the western South Urals slope. The first data on the noble metal (Au, Pt, Pd, Ru, Rh and Ir) specialization both background terrigenous rocks of the Lower and Middle Riphean (Mesoproterozoic) of the Bashkir anticlinorium and their even-aged sedimentary formations confined to linear tectonic zones and undergone a local dynamothermal metamorphism of greenschist facies are considered. Result of the studies revealed genetic differences in the noble metal specialization of background terrigenous deposits and terrigenous rocks from linear tectonic zones.
Key words: Bashkir anticlinorium, Lower Riphean, Middle Riphean, PGE, Au, terrigenous rocks, linear tectonic zones.
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