On the challenging gabbro in the intrusions of the peridotite-pyroxenite-gabbronorite formation by the example of the geological structure of the Fedorova tundra top intrusion

The typical area with widespread rocks of the "gabbro" mineral association (Pl+Amp) within the Fedorova Tundra intrusive has been studied. It has been shown that "gabbro" is a result of autometamorphic reworking of rocks with the three-mineral gabbronoritic association - Pl+Opx+Cpx.