Fig. 5

a: Mean wt.% Ag values for populations of gold particles from orogenic, magmatic-hydrothermal and oxidizing chloride-hydrothermal systems. b: Mean wt.% Ag for more refined source styles of orogenic and magmatic-hydrothermal mineralization. Dotted lines indicate the mean values for Ag ranges of gold from orogenic settings and ranges of values in gold from porphyry and epithermal (0–44 wt.% Ag) systems (data from Morrison 1991). Figures in parentheses refer to the number of populations in each curve (data from Online Resources 1 and 2)