Silver and Sulfur eH-pH diagram
Modified from Faure, G., 1991, Principles and Applications of Inorganic Geochemistry, 626 p. MacMillan, New York.
This is his figure 22.4A, constructed for a system containing Total Sulfur = 10-3 mol/L at 25 degrees C and 1 atm.

A hot springs system at higher temperature and different concentrations of sulfur and Ag would look different!
The dominant speci es are indicated for each area. The dotted lines represent the lines of equla concentration for S species, and the solid lines for Ag species