возраст гранитов, геохимия, Уральский ороген, тиманская активность, континентальный рифтогенез, age of granites, geochemistry, Uralian orogen, Timanian activity, continental rifting, Engineering geology. Rock mechanics. Soil mechanics. Underground construction, TA703-712

This is represents the results of dating of the Nikolsky granite massif (by Ar-Ar and Rb-Sr methods) situated within the Ufaley block which is the complicate heterogeneous structure in the accretion zone between the Uralian orogen and the East European platform in the Sout-Middle Urals region. The age of granites ranges from 570 to 30 Ma and corresponds to a final stages of the Timanian tectonic-thermal activity fixing by the granite generation and metamorphic events in the Cis-Polar, Polar and Southern Urals. The setting of the age of the Nickolsky granite extends our imaginations about the scale of the Vend-Cambrian events on the western slope of the Urals, and intrusion of such granites, probably, was connected with movements on preexisting faults which were formed during an ancient continental rifting stage.