Thermodynamic model identifies how gold reaches Earth's surface

[hunter]

A research team including a University of Michigan scientist has discovered a new gold-sulfur complex that helps researchers understand how gold deposits are formed.

Gold in ore deposits associated with volcanoes around the Pacific Ring of Fire originates in Earth's mantle and is transported by magma to its surface. But how that gold is brought to the surface has been a subject of debate. Now, the research team has used numerical modeling to reveal the specific conditions that lead to the enrichment of gold in magmas that rise from the Earth's mantle to its surface.

Specifically, the model reveals the importance of a gold-trisulfur complex whose existence has been vigorously debated, according to Adam Simon, U-M professor of Earth and environmental sciences and co-author of the study.

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https://phys.org/news/2024-12-thermodynamic-gold-earth-surface.html

I find the chemistry and geology here fascinating. At the same time I'm hoping it doesn't lead to any new insights about where gold might be found. Gold mining is a very dirty business.