Abstract
A computer program for the generation of mineral-stability diagrams in terms of log ( Σ SO 4 Σ H 2 S ) vs pH or T is presented. Simple modifications of the program to produce log fO 2 vs pH or T diagrams also are documented. Such diagrams are useful particularly in the geochemical interpretation of hydrothermal sulfide ore deposits. Plotting of other geochemical parameters such as log fS 2, mole fractions of aqueous sulfur species, sulfur isotopic compositions, and metal complex solubilities also is possible utilizing the mineral-stability diagram as a base. Both line-printer and digital-plotter methods are explained.
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