Diorites of the Dioritoviy massif (Polar Urals): geochronological and isotope-geochemical data

For the first time, the Lu-Hf isotope system of zircons from rocks of the Dioritoviy massif has been characterized and the results of U-Pb (SIMS) dating and the micro-elemental composition of zircons from this massif have been examined in detail. By the petro-geochemical and isotope-geochemical data, diorites of the massif have been found to be formed in the Early and Middle Devonian (Emsian-Eifelian) time in the island-arc geodynamic conditions of a juvenile mantle (almost coeval with diorites) protolith, as indicated by ɛHf(t) positive values and TDM(2) model age.