How to measure sulfur fugacity in granites and their associated hydrothermal gold,?

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Bayan Hussien

Well,

Article Tellurium, magmatic fluids and orogenic gold: An early magma...

Article Magnetite as an indicator of granite fertility and gold mine...

Ahmed Hamdy

thank you so much prof. Bayan Hussien

Steve Johnson

I do not rhink rhe question can be answered. Crystal inclusion mineralogy on zoned minerals might point the way to relative abundance in a granite but abundance is not “fugacity”. The “activity” of an ionic species of sulfur like SO4-2 might be back calculated in a tricky way but fugacity? Best i know “Fugacity” is not amenable to direct measuremen

Thanks Dr. Steve Johnson