Petrochemistry of the Yarot massif granites (Subpolar Urals): new data

The paper presents the results of silicate analysis of the Yarot granites massif (Subpolar Urals). During the study, the chemical composition of the rock was considered in detail; the contents of the main petrogenic components (SiO2, K2O, Na2O) made it possible to determine it as a potassiumsodium type leucogranite with signs of high potassium formation. The marker in the form of ratios of oxides of the major alkaline metals showed that the initial substrate for the formation of rocks of the Yarot massif was magmatice P d aobtain information not only about the features of the parent melts, but also about the geodynamic conditions of the formation of the Yarot massif. Indicator relationships (La/Lu, Eu/Eu*, Th/U, Nb/Ta, Y/Nb) and normalization by chondrite and plagiogranite MOR showed that the rocks in question were formed from TR enriched melts belonging to a deep crustal type source. Classification diagram of J. A. Pierce and D. Papu confirmed L. V. Makhlaev's findings, according to which Yarot rocks are intraplate granites.