A union representing workers at Lumina Copper's Caserones mine in Chile said on Thursday that contract negotiations with the company had failed, paving the way for a potential strike.
Yttrium is just one a host critical minerals on the list of Chinese imports targeted for the next escalation of the simmering trade war between the two countries.
Paulson & Co has threatened to replace Detour's board if it does not successfully explore strategic alternatives, including a sale, and look for a new chief executive.
The London Metal Exchange has asked companies that assess prices of battery-grade lithium to submit proposals to supply a reference for the cash-settled contracts it plans to launch next year.