TY JOUR TI Specifics of the distribution of rare-earth and rare elements in the weathering crusts of the Nem and Zhezhimparma uplands at the Southern Timan KW Southern Timan KW Dzhezhim suite KW weathering crust KW rare earth and trace elements JO Vestnik of geosciences AU Grakova, O.V. AU Popvasev, K.S. PY 2025 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"