Abstract
Mo-Cu and Au-Ag-Pb-Zn ore occurrences of the Verkhne-Myaundzhinsky ore cluster were studied, that located among Jurassic terrigenous complexes of the Inyali-Debin turbidite terrane of the Yana-Kolyma orogenic belt. The Speshnoye Mo-Cu ore occurrence is represented by a sulfide-quartz stockwork and is hosted by porphyry-like quartz syenites with an U-Pb age of 84 Ma; the Spyashchee Au-Ag-Pb-Zn ore occurrence represents a series of carbonate-quartz veins and mineralized zones in Jurassic sedimentary rocks. The geochemical spectrum of the stockwork mineralization is Mo-Au-Ag-Co-Cu-(As, W), while that of the vein-veinlet one is Pb-Ag-Sb-Au-As-Zn-Bi. The Verkhne-Myaundzhinsky ore cluster of the Central segment of the Yana-Kolyma orogenic belt represents a porphyry-epithermal ore-magmatic system formed by a hypabyssal stock of syenite-monzonite composition, by a sulfide-quartz stockwork with Mo-Cu mineralization, and by subepithermal vein-veinlet Au-Ag-Pb-Zn mineralizati Its age corresponds to the age of the second stage of formati of the Okhotsk-Chukotka volcano-plutonic belt.
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