N.V. Shatova, S.V. Seregin (VSEGEI)

NEW DATA ON GEOCHRONOLOGICAL AGE OF INTRUSIVE ROCKS OF THE NAMYNDYKAN AND VICTORINSKY COMPLEXES IN THE SOUTHERN OMOLON MASSIF (MAGADAN REGION, THE RUSSIAN FAR EAST)

The article provides new geochronological and isotope-geochemical data, which make it possible to identify two groups of intrusive rocks in the southern Omolon Massif and to clarify their geodynamic position. The petrological-geochemical and isotope-geochronological aspects of the evolution of magmas are discussed. Based on the study, the age of the Namyndykan Complex was corrected, and the age of the Victorinsky complex was confirmed as Late Cretaceous.
Keywords: geodynamic regimes, Omolon Massif, U-Pb dating, Q-57-XXVII, Okhotsk-Chukchi volcanic belt, geochemical features.