TY JOUR TI S-granites of the Izhma zone of the Pechora basin basement: features of composition, U-Pb and 40Ar-39Ar dating results KW Pechora basin KW Izhma zone KW basement KW granite KW zircon KW U-Pb SHRIMP-RG age KW muscovite KW 40Ar-39Ar age of muscovite JO Vestnik of geosciences AU Andreichev, V.L. AU Soboleva, A.A. AU Dovzhikova, E.G. AU Coble, M.. AU Ronkin, Y.L. AU Travin, A.V. PY 2026 IS PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"