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UDC (553.775:553.411):(553.21/.24+550.42) SULPHATE-CHLORIDE HIGH-TEMPERATURE FLUIDS WITH PARTICIPATION OF GOLD AND RARE ELEMENTS (EXPERIMENTAL DATA)
Experiments are carried out within the bounds of the magmagene process model during the deposits formation with participation of sulphate-sulphide-chloride fluids. Specific volumes (ρ, cm3/g) of fluids with composition of 2 m Na2SO4–H2O and 2 m Na2SO4–0,5 m NaCl–H2O in the range of 300–450 °C, 100–700 bars with measurement of their homogenization parameters (Tgom, Pgom) are experimentally determined. These fluids are studied for an influence of pressure on solubility changes of gold and synthesized Fe, Cu, Mo sulfides at P = 230–550 bars and temperature 376 °С. Effects of the obvious reduction of sulfides solubility and, on the contrary, the increase of Au solubility with pressure rise from 230 to 550 bars are ascertained for the first time.
Key words: sulphate-chloride fluids, above-critical conditions, migrational ability, ore components.
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