Abstract
The article provides a novel detailed petrographic, petrochemical and mineralogical description of the Talatshinskoye-2 slab stone deposit. Fergusonite was found in the rocks of the Uraltau anticlinorium for the first time. The correlation of the studied object with other deposits of slab stone was carried out. An increased content of alkalis was revealed, which is an atypical characteristic for shales of the eastern flank of the Uraltau anticlinorium. The contents of niobium and yttrium directly indicate that the protolith belongs to acidic alkaline formations. The first manifestations of rare-metal-rare-earth Y-Nb-Ta-mineralization were found in shales of the Uraltau anticlinorium. Based on a set of features, including petrochemical, geochemical, and mineralogical, it was concluded that subalkaline granitoids served as the protolith for the rocks of the deposit.
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