NOBLE METALLIZATION OF THE GULE INTRUSION (Siberian Platform)

Under consideration is noble metallization of placers of the aquifers draining the Gule intrusion of ultrabasic and alkaline rocks and carbonatites. More than 15 platinum group minerals and gold are established with optical and X-ray methods. Of them, the major minerals are intermetallides of Os-Ir-Ru composition and native gold. Insignificant impurities are PGE sulfides, arsenides, antimonides, and tellurides. Principal conclusions are made about the conditions of the primary noble metallization in the region. In its geology, geochemistry and mineralogy, this metalIization is comparable with the Alpine-type deposits recognized by L. J. Cabri. To elucidate geochemical features of this mineralization more comprehensively, it is necessary to study distribution of PGE and gold in rocks of a multiphase intrusion.