NEW DATA ABOUT THE CHEMICAL COMPOSITION AND AGE OF THE KOZLINOGORSK COMPLEX (SOUTHERN URALS)
The alkaline rocks of the Kozlinogorsk complex have the unclear geochemi-cal features. They are slightly closed to ancient within-plate complexes of the western slope of the Urals and to the Ordovician syenites of the Ilmeno-Vishnevogorsk complex. Some features notes to their connection with the oceanic stage. This complex is situated in the conjunction zone between the Urals and the East European Craton, we suppose the complicate genesis and the mixing mantle-crust source during their generation. New datings (Ar-Ar age about 457 M.a. and U-Pb (zircons) age about 450 m.a) allow to mapping that alkaline rock complex as the Upper Ordovician.