The formation conditions of the Bodorono gold deposit, Sakha (Yakutia)

Kardashevskaia V. N., Anisimova G. S., Badanina E. V., Bocharov V. N., Ponomareva N. I.

Zapiski RMO (Proceedings of the Russian Mineralogical Society). 2020. V. 149. N 3. P. 96-110

https://doi.org/10.31857/S0869605520030028

Language: Russian

Abstract

In the present paper we consider the formation conditions of the Bodorono gold deposit that is located in South Yakutia. There are three mineral assemblages in metamorphic rocks associated with gold ores: (1) pyrite-pyrrhotite-quartz, (2) gold-galena-sphalerite-quartz (goldpolymetallic), and (3) gold-tellur-bismuth-quartz. According to the research of fluid inclusions in quartz, formation conditions of the gold-polymetallic assemblage were 270–300 °C and 0.8–1 kbar wherein participated gases consisted of CO₂ (68%) and CH₄ (32%). When the gold-tellurium-bismuth-quartz assemblage was formed, mineral formation conditions corresponded to 145–200 °C and 0.4–0.6 kbar wherein participated gases composed of CO₂ (95%), N₂ (3%), CH₄ (2%).

Keywords: gold deposit, quartz, fluid inclusions, mineral formation conditions