TY JOUR TI Geochemical and isotopic characteristics of paleocavities mineral filling in the Upper Devonian-Lower Carboniferous limestones on the eastern slope of the Middle Urals (vicinity of Pershino village) KW paleokarst KW phreatic speleothems KW terra rossa KW collapse breccias KW groundwater KW REE KW carbon and oxygen isotopes JO Vestnik of geosciences AU Dub, S.A. AU Mizens, G.A. AU Kuleshov, V.N. AU Petrov, O.L. PY 2022 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"