New data on the metallogeny of the unique gulin klinopyroxenite-dunite massif (northern Siberia, Russia)

The paper summarizes original information on the metallogeny of the Gulin klinopyroxenite-dunite massif, the largest in the world, located within the Maimecha-Kotui province in northern Siberia. The unique feature of associated gold-platinum placers is determined by discovered mineral parageneses of platinum group elements (PGE) as well as by considerable predicted resources of noble metals, osmium among them, comparable only with the commercial Witwatersrand deposits (RSA). Two different magmatic complexes constitute the heterogeneous Gulin massif: (1) Gulin klinopyroxenite-dunite and (2) Maimecha-Kotui ijolite-carbonatite complexes, both with characteristic rock association and metallogenic specialization. Originally discovered polycomponent solid solutions, based on platinum and refractory PGE, reflect the specific geodynamic conditions of the formation and generation of the ultramafic rocks. Solid-ductile emplacement of mantle ultramafic diapir is suggested in the frame of a fluid-restit model.