Lynas has secured the Caldeira heavy rare earth deposit in Brazil at a 68.4 percent premium, the latest evidence that supply-chain anxiety is already driving factory-level decisions, not just speculation. Recovery at Caldeira proved technically viable in the definitive feasibility study — 71 percent average recovery of magnetic rare earth oxides — and improved to about 80 percent in the most recent pilot-plant results.
The product at the mine site is a mixed rare earth carbonate; separation — the hard downstream step — would run through Lynas’s LAMP facility in Malaysia, an existing non-Chinese pathway. Caldeira is an ionic-clay deposit, the geology that produces the heavy rare earths (dysprosium, terbium) most exposed to China’s still-active April 2025 controls and the November 10 truce expiry.
The premium is the market’s verdict on the calendar: Western structural independence from Chinese rare earths is estimated at five to seven years out, and the January 1, 2027 U.S. defense procurement ban on Chinese-origin magnets lands 52 days after the truce expires. Brazil’s October 25 runoff adds a political overlay — the winner sets the regulatory posture over the country’s mineral assets.