Capstone Mining is focused on generating strong cash flows in all price environments with our multi-asset portfolio of mines and projects. We are on target towards sustainable 200 million pounds copper production by 2022.

Exploration Excellence

Our exploration team has delivered net asset value creation through the drill bit. Major league results at multiple Capstone assets, both previously and currently owned, has proven the team’s exploration excellence. The Exploration page outlines our current brownfield and greenfield focus areas.


Pinto Valley has successfully demonstrated positive economics by applying a novel patented catalytic technology to existing dump leach. The plan is to increase copper cathode production to 300-350 million pounds from residual and high-grade waste over the next two decades, generating strong cash flow from the mine’s underutilized SX-EW plant, which is currently operating at only 20% capacity.

Pinto Valley intends to significantly expand leaching activity, targeting approximately 280 to 300 million tonnes of historic leach stockpile and 175 to 185 million tonnes of high-grade waste already scheduled for removal over the remaining 19 years of mine life. Potential to increase the mill cut-off grade to bolster copper concentrate production, thereby increasing the tonnage of high-grade waste available for leaching, will be studied during H2 2020. An updated NI 43-101 Technical Report was filed in June, 2021.

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Consolidated Mineral Reserves & Resources

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Technical Reports

Pinto Valley

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