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Have earthquakes been secretly producing gold all this time?
Posted on September 5, 2024, 4:40 PM
Have you ever wondered where gold nuggets come from? In a 2024 study, researchers explored how earthquakes may help create them.
Earthquakes may be the reason behind the formation of gold nuggets, according to a new study published in the journal Nature Geosciences.
Scientists have long suspected that gold comes from hot fluids that flow through cracks in the Earth's crust, with quartz veins serving as a primary host, but the low concentration of gold in these fluids makes it difficult to explain the presence of large gold nuggets.
The research team, led by geologist Dr Chris Voysey, tested a theory related to piezoelectricity, also known as the ability of quartz to generate an electric charge when subjected to pressure, as happens during an earthquake.
The team simulated earthquake conditions in the lab, and found under a microscope that stressed quartz could electrochemically deposit gold on its surface.
“The results were astonishing,” said study co-author Professor Andy Tomkins from Monash University’s School of Earth, Atmosphere and Environment in a statement.
“The electrochemically stressed quartz not only deposited gold on its surface, but also formed and aggregated gold nanoparticles. Surprisingly, the gold had a tendency to deposit on existing gold grains rather than forming new grains.”
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