BHP Group and the No. 2 Supervisors and Staff Union are in the final day of government-mediated talks at Escondida, the world's largest copper mine. A strike could begin as early as October 14 if they fail to agree on a new contract.
BHP has made an improved offer. The union said it addressed some of its demands but that significant differences remain. It is seeking a greater share of profits amid near-record copper prices and called the company's proposed signing bonus of roughly $25,500 per worker below market.
A strike by the union's more than 1,000 members would add to supply concerns in an already tight market.