The northwestern contact of the Ilmenogorsky miaskite complex exhibits a succession of rocks from early banded meso- and melanocratic syenites to granosyenites and granites and further complex series of leucocratic syenites, carbonatites, syenitic and carbonatitic pegmatites, and, fnally, rare metal granites (as well as amazonite pegmatites). This succession is evidence of long evolution of rocks under periodical compression and opening of fractures. Various mineral facies of fenites (pyroxene, biotite, amphibole, feldspar or combined) were formed after early syenites and granites. Numerous small bodies of igneous glimmerites, melanocratic amphibole-biotite and biotite-pyrox-ene vein rocks occur in the area of the quarry.

Figures 15. Tables 1. References 4.

Key words: fenites, ontogeny, textures of aggregates, Ilmenogorsky complex.

V.A. Popov,  Institute of Mineralogy UB RAS, Miass,popov@mineralogy.ru

V.A. Muftakhov, Institute of Mineralogy UB RAS, Miass

1. Levin, V.Y. (1974) [Alkaline province of the Ilmeny– Vishnevye Mountains]. Moscow, Nauka, 223 p. (in Russian).
2. Levin V.Ya., Ronenson B.M., Samkov S.V., Levina I.A., Sergeev N.S., Kiselev A.P. (1997) [Alkaline-carbonatite complexes of the Urals]. Yekaterinburg, Uralhelicom, 274 p. (in Russian).
3. Popov V.A., Bazhenov A.G. (2009) [Structure of the northwestern contact of the Ilmenogorsky miaskite complex]. 10-e Vseross. Nauchnye chteniya pamyati ilmenskogo mineraloga V.O. Polyakova [Tenth All-Russian Scientifc Meeting in the Memory of Ilmeny Mineralogist V.O. Polyakov]. Miass, IMin UrO RAN, 23–29 (in Russian).
4. Talantsev A.S., Petrova G.A. (1991) [Formation conditions of carbonatites of the Ilmeno-Vishnevogorsky alkaline complex]. Sverdlovsk, UrO AN SSSR, 71 p. (in Russian).