Quote:Gold could be deposited almost instantaneously in the Earth’s crust during earthquakes, say Australian researchers.
The researchers have found gold is formed when an earthquake widens a fluid-filled rock fracture, causing a drop in pressure, which in turn allows gold dissolved in the fluid to rapidly leach out.
Their study, reported in the journal Nature Geoscience, explains how the metal changes from a soluble state to concentrated deposits.
“[This process] may underpin the formation of up to 80 per cent of the world’s gold deposits,” they write.
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