Deep beneath submarine volcanoes, a natural process akin to a 'gold kitchen' is enriching Earth's crust with precious metals. Researchers studying volcanic glass from the Kermadec island arc north of New Zealand discovered that water-rich mantle repeatedly melts under subduction zones, concentrating gold in rising magma.

The intense melting breaks down sulfur-rich minerals that typically trap gold, allowing it to be released into the melt and eventually deposited on Earth's surface. This process highlights how geological activity can significantly influence metal distribution beneath the seafloor.

Understanding these mechanisms could provide valuable insights for future mineral exploration efforts, particularly in regions where subduction zones are active, such as around New Zealand.