TY JOUR TI U/Pb age and sources of detrital zircon from Upper Riphaean sandstones of the Nemskaya Upland (South Timan) KW Upper Riphaean KW Dzhezhim Formation KW South Timan KW zircon KW U-Pb dating JO Proceedings of the Komi Science Centre of the Ural Division of the Russian Academy of Sciences AU Grakova, O.V. AU Nikulova, N.Y. AU Khubanov, V.B. PY 2024 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"