How do gold nuggets form? Earthquakes may be the key
by Robin George Andrews

National Geographic    Translate This Article
2 September 2024

On 2 September 2024 National Geographic reported: Much of the world's gold is mined from natural veins of quartz, a glassy mineral that streaks through large chunks of Earth's squashed-up crust. But the geologic process that put gold nuggets there in the first place was a mystery. Now, a new study published today in Nature Geoscience has come up with a convincing, and surprising, answer: electricity, and earthquakes -- lots of them. Global Good News service views this news as a sign of rising positivity in the field of science, documenting the growth of life-supporting, evolutionary trends.

Those nuggets owe their existence to the strange electrical properties of common quartz. When squished or jiggled, the mineral generates electricity. That drags gold particles out of fluid in Earth's crust. The particles crystallize out as grains of gold -- and, over time, with enough electrical stimulation, those grains bloom into nuggets.

'If you shake quartz, it makes electricity. If you make electricity, gold comes out,' says Christopher Voisey, a geologist at Monash University in Australia and the lead author of the new paper. Earthquakes are the most likely natural source of that shaking, and the team's lab experiments show that earthquakes can make gold nuggets.

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