Petrological, Geochemical and Geochronological Features of the Formation of Jurassic Granites of the Ariadne Massif (Sikhote-Alin, Russia)

The article presents the first geochemical and geochronological data on granites of the Ariadne intrusion of ultramafic mafics, which concentrates significant resources of strategic and critically important metals. These granites with U–Pb zircon ages of 165.2 ± 1.1 and 165.5 ± 1.1 Ma are highly differentiated A2-type rocks formed as a result of melting of terrigenous rocks during the intrusion of an ultramafic–mafic OIB melt into an accretionary prism. The results confirm the hypothesis of a possible ascent of asthenospheric material from beneath the subsiding oceanic plate.