Late cretaceous granitoids of the Mainitsky terren (Eastern Koryak Highlands): age, geochemical features and geodynamics

New U-Pb geochronological and geochemical data for granitoids of the Mainitsky terrane of the Koryak folded region are presented. It is shown that granitoids cut the folded-thrust structures of the Mainitsky terrane, which include ophiolites of the Late Paleozoic – Late Mesozoic and volcanogenic-siliceous-terrigenous deposits of the Middle Jurassic – the Turonian. Granitoids correspond to low-alkaline quartz diorites and I-type granodiorites, are part of the Late Cretaceous volcanic-plutonic association and indicate their formation in a convergent margin. The U-Pb ages of zircons are 82–90 million years.