Key facts
- The strike at Centinela mine ended after workers ratified a new contract.
- More than 700 members of the Distrito Centinela and Minera Esperanza unions participated in the strike.
- Workers sought equal benefits regardless of their union affiliation.
- The mine produced 240,400 metric tons of copper in 2025.
Workers from two unions at Antofagasta's Centinela copper mine in Chile ratified a new collective bargaining contract on Sunday, ending a strike that began on October 7. The agreement was approved by 94.49% of participating workers. The strike involved more than 700 members of the Distrito Centinela and Minera Esperanza unions, who had sought equal benefits for all workers. The parties returned to negotiations on Tuesday to resolve the dispute, with three workers having undertaken a hunger strike to pressure a resolution. Antofagasta stated on Wednesday that production levels had been maintained without negative impact. The mine produced 240,400 metric tons of copper in 2025.