COMPOSITION AND GEOCHRONOLOGY OF MESOZOIC MAGMATISM IN THE CENTRAL PART OF THE EVOTINSKY ORE DISTRICT (ALDANO-STANOVOY SHIELD)

The paper presents the results of comprehensive petro-geochemical and geochronological studies of Mesozoic igneous rocks of the Evotinsky ore district, which is geographically part of the central part of the Aldan-Stanovoy shield. When interpreting the values of the petro-geochemical composition of the rocks, it was concluded that all magmatic formations belong to the high-potassium calc-alkaline and shoshonite-latite petrochemical series, as well as the duality of the petro-geochemical compositions due to the presence of both mantle and crustal sources, or most likely mixed mantle-crustal genesis. For the first time, using the SHRIMP-II method, the period of formation of igneous rocks of the Evotinsky ore district was identified using zircons - 122-114 Ma corresponding to the Early Cretaceous (Aptian).