40ar/39ar датирование, урал, дислокационный метаморфизм, коллизия континентальных плит, 40ar/39ar/dating, urals, dislocation metamorphism, collision of continental plates, Engineering geology. Rock mechanics. Soil mechanics. Underground construction, TA703-712

It was performedthe 40Ar/39Ar dating of the biotites from the strong deformed tonalites of Western Verkhisetsk complex in the zone of Serov-Mauk fault. It was determined that the main phase of deformations with predominantly sinistral component occurred around 315-310 Ma ago. This data supports the ideas of several uralian geologists that the continental collision process started with the overthrust dislocations and later transformed into left-lateral faults. In Early Permian time (278-276 Ma) the studied rocks undergone secondary termal influence probably caused by the dislocations with normal-fault character. The signs of these dislocations were defined in the investigated rocks.