Syenite-pegmatites of Pryazovie with zirconium-rear-earth mineralization

摘要

The preliminary results of investigation of rock-forming and accessory minerals from syenite-pegmatites of Pryazovie region are adduced in this article. It was determined that britolite and zircon are the main mineral bearers of rear metals.According to the data of mineral crystallochemistry, morphology, distribution and the results of investigations of the mineral-forming matter in inclusions. It is anticipated that syenite-pegmatites origin was closely connected with magmatic differentiation of syenite melt and with subsequent melt decomposition to fluorine-chlorine-carbonate and silicate parts.