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Capstone Copper|Chile|Mantos Blancos|Copper|Mining|Silver
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capstone-copper|chile|mantos-blancos|copper|mining|silver

Capstone inks three-year wage deal with unions at Mantos Blancos amid expansion plans

Capstone copper piles

Capstone copper piles

22nd June 2026

By: Marleny Arnoldi

Online News Editor

     

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TSX- and ASX-listed Capstone Copper has signed a new three-year collective bargaining agreement with both unions at the Mantos Blancos copper and silver mine, in Chile.

Following successful negotiation of agreements that support Capstone's employees and the long-term sustainability of the operation, Mantos Blancos will continue to focus on safe and responsible mining which brings great benefits to the workforce and surrounding communities, the company says in a statement. 

Mantos Blancos currently employs about 1 106 people, with 92% of them stemming from the local communities in the Antofagasta region of Chile.

The total workforce at Mantos Blancos is about 2 928 people when including the operation's 1 822 contractors.

Meanwhile, Capstone also recently submitted an environmental application for the Mantos Blancos Phase II project. The project represents the mine's next phase of growth and supports the long-term operational continuity of the mine in Antofagasta.

The Phase II expansion contemplates increasing the sulphide concentrator plant's throughput capacity to at least 27 000 t/d of ore - from the current design throughput capacity of 20 000 t/d of ore.

The expansion considers new equipment for concentrate filtration, thickening and filtering of tailings, as well as upgrades to existing process operations.

Mantos Blancos Phase II also envisions the construction of a new in-pit tailings storage facility beyond 2030.

The submission of the full environmental impact assessment permit application for the expansion project is expected to be followed by the release of a prefeasibility study outlining further project details during the third quarter.

After receiving all environmental approvals and sectoral permits, Capstone plans to start with this expanded production between 2030 and 2031.

 

Edited by Creamer Media Reporter

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