Geologicheskii Vestnik

The Balbuk monzonite massif, localized in the serpentinite mélange of the Main Ural Fault, hosts quartz-vein gold deposits. The genesis of these deposits is poorly understood. This article presents the results of fluid inclusions study in white vein quartz intersecting monzonites in an exploration trench near the village of Starobalbukovo. It was established that a narrow, stable range of salinity (7.4–9.7 wt.% NaCl-eq.) and homogenization temperatures (234–265 °C) of fluid inclusions indicates a single magmatic source of mineral-forming fluid and is consistent with typical vein gold deposits. Measured eutectic temperatures of –23 to –35 °C indicate the presence of MgCl₂–NaCl–H₂O salts in the fluid.

Balbuk massif, gold mineralization, quartz veins, fluid inclusions

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