Problems of Dating the Au–Pd Mineralization of the Chudnoye Deposit (the Subpolar Urals)

Ages of minerals of the Chudnoe deposit ores established by the isotope geochronology methods do not allow one to correctly estimate the time of formation of Au–Pd mineralization due to the lack of reliable signs of their syngenicity with gold. Based on linking isotope geochronological data with the history of the geological development of the Subpolar Urals and the entire complex of endogenous and exogenous processes that determined the features of its geological structure and minerageny, the Early Paleozoic mineralization age has been substantiated. The similar age of the metarhyolites hosting the mineralization suggests not only spatial, but also paragenetic relations between the ore mineralization and felsic volcanites. When studying the mineral composition and structural and textural features of ores, one should take into account the imposition of post-ore processes, especially the most powerful metamorphism manifested in the Subpolar Urals with the peak in the Upper Paleozoic (∼250 Ma).