N.V. SHATOVA, А.V. МOLCHANOV, А.V. ТЕREKHOV, V.V. SHATOV, O.V. PETROV, S.A. SERGEEV, EH.M. PRASOLOV (VSEGEI), G.P. DVORNIK (IGG UB RAS), V.I. LEONTEV (VSEGEI, SPMU)

Ryabinovoe copper-gold-porphyry deposit (Southern Yakutia): geology, noble gases isotope systematics and isotopic (U-Pb, Rb-Sr, Re-Os) dating of wallrock alteration and ore-forming processes

In the Ryabinovoe copper-gold-porphyry deposit, the ore mineralization is belonging to multi-stage metasomatism fields, which were formed in two stages. In the first, pre-ore stage, high-temperature potassium-sodium metasomatites – aegirine feldspathites – were appeared whereas gumbeites – in the second, low/medium-temperature stage as a both – carbonate-sericite-muscovite-orthoclase and quartz-carbonate-barite-adular varieties. The results of isotopic investigations (U-Pb, Rb-Sr, Re-Os, ⁴⁰Ar/³⁶Ar, ³He/⁴He, ²⁰Ne) of the above-mentioned metasomatites and ore mineralization are discussed in the paper.
Keywords: isotopic geochemistry of noble gases, geochronology, wallrock alteration, ore-forming processes, Ryabinovoe Cu-Au-porphyry deposit, Southern Yakutia.