Поступила в редакцию 25 марта 2019 г. The 190 Pt-4 He age of the isoferroplatinum from andesitic uid-explosive breccias ( uidolites, a new type of platinum-bearing rocks) of the Poperechnoye deposit (Malyi Khingan, Russia) estimated as 125 ± 21 Ma correlates well with the peak magmatic activity in the Bureya massif and East Asia caused by upwelling of slab-window asthenosphere in a transform continental margin setting following the cessation of subduction of the Izanagi Plate under the composite Jiamusi-Bureya-Khanka terrane in Jurassic times.