Geochemistry of rare elements in zircon from granites of the Kuzpuayu massif (the Subpolar Urals)

Abstract

Many questions of the genesis of igneous rocks, hydrothermal-metasomatic processes, ore formation processes can be solved by studying accessory minerals containing rare earths. One of the most informative accessory minerals is zircon, which during growth records all the changes occurring in the mineral formation environment in its composition, structure and morphology. The analysis of the contents of rare elements in zircons from the granite of the Kuzpuayu massif revealed the absence of a number of elements. The deficiency of Tb, Ho, Tm indicates the formation of the studied granites at high temperature and the active role of oxygen. Normalization of TR contents by McDonough and Sun chondrite for zircon revealed a gradual accumulation of these elements during the entire period of formation of the Kuzpuayu granites