TY JOUR TI Grothite from schists of the Irtysh Shear Zone (East Kazakhstan) KW grothite KW schists KW metamorphism KW Eastern Kazakhstan KW Irtysh Shear Zone JO Vestnik of geosciences AU Nastavko, E.V. AU Fedosyuk, G.A. AU Zmeev, B.Y. PY 2025 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"