In our research we summarized data obtained on the composition, structure, and geochemical characteristics of the granitoid plutons of the eastern part of the Krasnoleninsky arch of the East Siberian Plate and the age of rocks surrounding them. The Kamenny, Palyanovsky, North Kamenny and Vodorazdelny granite, granodiorite, and granosyenite plutons were emplaced in the interval of 297-261 Ma (Early-Late Permian) as melting products of the lower-middle crust at the postorogenic stage. The formation of granitoid massifs in the basement of the Em-Egovsky summit took place in the Late Devonian (Frasnian, Famennian). They differ greatly from the rocks of the Kamenny pluton in composition, degree of secondary alterations, and tectonization.