Deposit in 19-million-year old caldera could dwarf sources in Bolivia, Chile and Australia
A lithium find in the McDermitt Caldera region on the border between US states of Oregon and Nevada has excited media attentions with the promise of lithium deposits exceeding those in Bolivia, which make up nearly a quarter of the world's resources.
The recent paper said estimates suggested there could be between 20 to 40 million tonnes of lithium contained within sediments of the whole McDermitt caldera, with the maximum likely amount set at 120 million tonnes buried in the collapsed volcano crater. "Even if this estimation is high due to variations in sediment thickness and/or lithium grade, the lithium inventory contained in McDermitt Caldera sediments would still be on par with, if not considerably larger than, the 10.2 million of Li inventory estimated to be contained in brines beneath the Salar de Uyuni in Bolivia previously considered the largest Li deposit on Earth," the paper said.
McDermitt Caldera sits on Oregon's southern border with Nevada. It is about 28 miles long north–south and 22 miles wide east–west at an elevation of around 6,816 feet or 2,078 meters and is likely to be the oldest of a sequence of calderas formed by the Yellowstone hotspot. Indigenous American groups including the
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