Behavior of Au, Sb, Te, As, and Bi in heterophase chloride oxidized fluids at 700°C in the pressure range of 109–124 MPa: Evidence from the study of synthetic inclusions

The heterophase state of magmagene fluids has been established for many hydrothermal deposits related to the development of oremagmatic systems of various geochemical profiles. The processes of heterogenization are most clearly reflected on the porphyry CuMoAu, SnW, some CuNiPt, Au skarn (AuCuTe type), and carbonatite deposits. The oxidized state of hydro thermal fluids corresponding to the sulfatesulfide equi librium is typical for some deposits [19]. Study of the composition of fluids in syngenetic gaseous and hydrosa line inclusions in minerals of ores from these deposits and rocks of ore bearing magmatic complexes demonstrates the contrasting distribution of metals between gaseous and hydrosaline phases of the heterophase ore forming fluid. The selective accumulation of ore elements in the composition of fluid phases with different compositions and densities (gaseous and hydrosaline) results in the appearance of gaseous and hydrosaline fluids with signif icantly different concentrations of ore elements. The dif ferent permeabilities of such fluid phases during their migration in the Earths crust results in the formation of geochemically related mineralization spatially discon nected and significantly different in the physicochemical conditions of its origin.