Metamorphic Conditions and Raman Spectroscopic Carbonaceous Material Thermometry of Host Schists of Olympiada and Eldorado Gold Deposits (Yenisey Ridge, Russia)

Metamorphic processes play a key role in forming orogenic gold deposits. In this paper, we present new evidence that host schists of the two largest deposits Yenisey ridge (Russia) Olympiada and Eldorado underwent single stage metamorphism contrast to surrounding blocks. This is moderate thermal gradient belongs Barrovian type, which typical for collisional event time range 800–850 Ma. The Ar/Ar age data presented paper review magmatic metamorphic events ore-forming indicate most productive (gold-sulfide-quartz) correlates well with regional type. indicates can have crucial ridge. Carbonaceous material thermometry wide obtained temperatures around 90–150 °C mean temperature each sample. highest are close peak estimated by garnet-biotite thermometry.