Capstone Copper Advances Mantos Blancos Expansion with Phase II Permit Submission
Event summary
- Capstone Copper submitted the Mantos Blancos Phase II Project for environmental impact assessment on June 19, 2026.
- The expansion aims to increase sulphide concentrator plant throughput to 27,000 tonnes per day from 20,000 tpd.
- Project includes new equipment for concentrate filtration, tailings management, and a new in-pit storage facility beyond 2030.
- Pre-feasibility study expected in Q3 2026, with production expansion targeted for 2030-2031.
- Mantos Blancos is located in the Antofagasta region of Chile.
The big picture
Capstone's Phase II expansion positions Mantos Blancos for long-term production growth amid increasing global demand for copper. The project reflects broader industry trends toward larger-scale, more efficient mining operations with stronger environmental management systems. Success will depend on navigating Chile's regulatory environment and maintaining operational discipline during the multi-year expansion.
What we're watching
- Regulatory Timelines
- Whether the environmental approval process will meet Capstone's projected schedule for Phase II.
- Capital Allocation
- How Capstone will balance investment in Mantos Blancos expansion against other growth projects.
- Operational Integration
- The pace at which new tailings management systems will be integrated into existing operations.