Typomorphic features of placer gold of the Sololi River basin (northeast of the Siberian platform)

Mineralogical features of placer gold and gold-sulfide ore occurrences the Sololi river basin from uplift Olenek arch have been studied. According to typomorphic indicators, two types are distinguished. The first type is a tabular lumpy shape, often with mineral indentation imprints. inner structure represented by granulation, recrystallization, high-grade intergranular veins, shells typical intermediate reservoirs. This characterized high fineness. sources this were gold-bearing reservoirs Permian Riphean widely developed in studied area. second includes subrounded poorly rounded gold, hooked, tabular, crystalline angular-lumpy shapes pitted-bumpy or flat surface, as well large growths quartz. fineness varies low very high. Its primary probably quartz veins genetically related metamorphic rocks Eekit series Precambrian rhyolites. Ore occurrence formed Late clastic during processes Mesozoic tectonomagmatic activation considered an additional source feeding. Establishment indicators low–temperature hydrothermal parageneses, such mercury cinnabar barite, suggests shallow low-temperature formation conditions occurrence.