ZONATION OF PHLOGOPITE OF CARBONATITE-PEGMATITES OF THE BULDYM DEPOSIT OF THE VISHNEVYE MOUNTAINS (SOUTH URALS)

Abstract

In a plate 19 cm in size from the columnar crystal of phlogopite Buldym deposit in the Southern Urals, we studied the composition of alternating greenish-brown, yellowish-brown and darker brown areas by electron-probe microanalysis. Dark growth zones of phlogopite are more titaniferous and ferruginous (which is typical of the mica group, annite–phlogopite). The composition of different zones of the studied phlogopite is close to the composition of the micas, the most frequently observed in the carbonatites. Phlogopite contains rare micro-inclusions of calcite, dolomite, apatite, feldspar, magnetite, zircon and pyrochlore.

Keywords

• phlogopite
• zones growth
• carbonatite
• buldym deposit
• southern urals