New data on ore geochemistry of the Rodionovskoe gold–quartz deposit, Northeast Russia

Resumo

The enrichment of gold–quartz ores from the Rodionovskoe deposit in chalcophile elements (Au, Ag, As, Sb) is established. The ores are characterized by small negative Eu anomalies and low REE contents, which are typical of magmatic fluids. Slight enrichment of ores in Bi is evidence of the possible involvement of magmatic fluid in ore formation, which may have been superimposed on early metamorphic quartz veins and veinlets. The variously oriented REE patterns also indicate the presence of another magmatic fluid source, which could be related to the post-ore granitic intrusion. These results generally confirm the metamorphic–magmatic model of the formation of the gold–quartz deposits of the Yana–Kolyma belt. Our data are of practical interest for regional metallogenic forecasts, search, and evaluation of gold deposits.