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Paleoproterozoic magmatism is associated with one of the three major peaks (spurts) of increased continental crust production (Dobretsov, Buslov, 2011). It gave rise to many unique ore deposits (Bushveld, Witwatersrand, etc.) In Russia, it is represented by the large North Transbaikalian metallogenic province at the southern margin of the Siberian Craton. Unique copper (Udokan,> 25 Mt Cu), vanadium and titanium (Chiney), tantalum and niobium (Katugin) and other (PGM, silver, gold, uranium etc.) ore deposits are clustered here. During the Late Paleoproterozoic times, rift basins of the Akitkan Belt and the Kodar–Udokan zone in the southern part of the Siberian Craton were gradually filled with volcanicsedimentary and sedimentary deposits. Paleoproterozoic magmatic rocks of the Udokan–Chiney region are represented by large granitoid massifs of the Kodar Complex (Kodar, Kemen etc.) and ultramafic–mafic massifs of the Chiney Complex (Chiney, Luktur, MyLove, Verkhniy Sakukan etc.) Mafic massifs were emplaced in a setting of postcollisional extension after the completion of collision and accretion events responsible for the assemblage of the Siberian Craton (Gladkochub et al., 2012).