TY JOUR TI Petrophysical grouping of schist rocks of the Nerkayu complex (the Nether-Polar Urals) KW schists KW composition KW physical properties KW density KW magnetic susceptibility KW Nerkayu complex KW Nether-Polar Urals JO Vestnik of geosciences AU Ponomareva, T.A. AU Kushmanova, E.V. PY 2025 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"