Experimental Study of the Transport of Chalcophile Metals in Gaseous Hydrogen Sulfide

摘要

Large amounts of experimental data have become available for the vapor transport of metals. Until recently, it has been considered to be of little geological significance owing to the low vapor pressures of major ore minerals. However, experimental studies have shown that a number of gaseous components, such as H2O vapor, gaseous H2S, and HC1 significantly enhance the solubility of poorly volatile compounds in the vapor phase [1-4]. Theoretically, this phenomenon is described as interaction between a poorly volatile component and vapor solution (solvation). The accumulation of experimental data will enable us to determine the thermodynamic properties of solvated species that are needed to construct quantitative physicochemical models of mineral deposits. The differences in the vapor transport of various metals can explain the metallogenic signatures of epithermal ore deposits and causes and trends for vertical geochemical zonation. These models are of great importance for predicting the depth of mineralization and erosion level [5].