Mr. Daniel Sampieri reports

CAPSTONE COPPER REPORTS TEMPORARY PRODUCTION INTERRUPTION AT MANTOVERDE OPERATION

Sulphide copper production is temporarily impacted due to a motor failure in the ball mill at Capstone Copper Corp.'s Mantoverde mine in Chile.

On Aug. 24, the Mantoverde site experienced a failure of one of its two ball mill electrical drive motors. Over the next few days, the team on site replaced the damaged motor with the spare to return to full capacity. However, on Aug. 30, the site experienced a failure of the second ball mill drive motor. Without an additional spare on site, this has resulted in a period of impacted production at Mantoverde.

The company estimates repairs to the ball mill motor will take approximately four weeks. During this period, it expects that Mantoverde will continue to operate at approximately half-capacity through bypassing the ball mill, an operating mode for which the circuit is configured and that the team has executed previously. An opportunity exists to further mitigate the effects of the interruption by rescheduling plant maintenance that had been planned for later in September to coincide with the ball mill downtime. Its team will continue to identify and execute mitigation plans, investigate the root cause of the motor failure, and advance a replacement and repair strategy to return to full capacity.

At this time, based on an estimated four-week repair schedule while the company continues to operate at half capacity during that period, it expects production to be impacted by 3,000 to 4,000 tonnes of copper in concentrate at Mantoverde. Capstone plans to provide further updates in due course.

About Capstone Copper Corp.

Capstone Copper is an Americas-focused copper mining company headquartered in Vancouver, Canada. It owns and operates the Pinto Valley copper mine located in Arizona, United States, the Cozamin copper-silver mine located in Zacatecas, Mexico, the Mantos Blancos copper-silver mine located in the Antofagasta region, Chile, and 70 per cent of the Mantoverde copper-gold mine, located in the Atacama region, Chile. In addition, it owns the fully permitted Santo Domingo copper-iron-gold project, located approximately 30 kilometres northeast of Mantoverde in the Atacama region, Chile, as well as a portfolio of exploration properties in the Americas.

Capstone Copper's strategy is to unlock transformational copper production growth while executing on cost and operational improvements through innovation, optimization, and safe and responsible production throughout its portfolio of assets. It focuses on profitability and disciplined capital allocation to surface stakeholder value. It is committed to creating a positive impact in the lives of people and local communities, while delivering compelling returns to investors by responsibly producing copper to meet the world's growing needs.

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