The Platinum-Bearing Belt (PBB) of the Urals is a giant chain of big massifs represented at more than 90 % by primarily magmatic mafic-ultramafic rocks, comprising two main discrete complexes: the earlier, layered, composed of dunite-clinopyroxenite-gabbro (DCG) rocks and the later, mostly of gabbro-norite (GN) composition. It is supposed that the first complex originated in the Vendian time, within an oceanic lithosphere of the Paleo-Asian ocean, under the influence of a vast superplume, and the second - in the Silurian, in a supra-subductional zone of the Tagil island arc.