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Published Wednesday in Nature Communications, the study details a new method for locating lithium in supervolcanic lake deposits. Currently, most of the silvery-white metal comes from pegmatite deposits in Australia and brine deposits in high-altitude salt flats in Chile.
Supervolcanoes can produce massive eruptions of hundreds to thousands of cubic kilometers of magma. As the enormous loss of magma causes the roof of the chamber to collapse following eruption, they appear as huge holes in the ground, known as calderas Cheap Men's Nike Air VaporMax 2.0 Casual White UK , rather than the cone-like shape typically associated with volcanoes.
The hole often fills with water to form a lake. Over tens of thousands of years, rainfall and hot springs leach out lithium from the volcanic deposits. The lithium accumulates, along with sediments, in the caldera lake, where it becomes concentrated in a clay called hectorite. Such supervolcanoes pose little risk of eruption because they are ancient.
To identify which supervolcanoes offer the best sources of lithium, researchers led by Gail Mahood Cheap Nike VaporMax Moc Flyknit Women's Triple Black UK , a professor of geological sciences at Stanford University's School of Earth, Energy & Environmental Sciences, measured the original concentration of lithium in the magma, because it is very difficult to measure directly the volatile element that easily shifts from solid to liquid to vapor.
To reach tiny bits of magma trapped in crystals during growth within the magma chamber, the researchers sliced through the host crystals to expose preserved magma blebs, which are 10 to 100 microns in diameter Cheap Men's Nike Air Max 270 Be True Multicolor UK , then analyzed them with the Sensitive