TY JOUR TI Monazite of alkaline ore metasomatites of the Lower Mezen ore field (Middle Timan): Th-U-Pb-data KW monazite KW Th-U-Pb-method KW Middle Timan JO Vestnik of geosciences AU Udoratina, O.V. AU Viryus, A.A. AU Kozyreva, I.V. PY 2023 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"