Mining Method

The most viable way to recover the ore body is by a well-established underground mining method called block caving. Block caving is safe, environmentally sound, and cost-effective for mining a large, deep orebody.

In block caving, a large section of ore is initially undercut by drilling and blasting, causing it to collapse under its weight. The blasted ore breaks apart and falls into a series of pre-constructed funnels and access tunnels to form ore extraction drawpoints. From the drawpoints, ore will pass through a series of handling systems to an initial crushing circuit underground before transferring to the above surface Concentrator Complex.

Concentrating

In the second step of the production process, we convert the ore from a low-grade material into a concentrate of high-grade copper inside the Concentrator Complex.

The technique all begins with a wet grinding process that turns the crushed ore into a slurry and transports it to flotation cells. When mixed with water, reagents, and air, the copper minerals produce a bubbly froth. The bubbles with copper are skimmed and filtered to produce copper concentrate.

The concentrate, which contains about 29-31% copper, will then be sent to customers for further processing.

Smelting and Refining

When the concentrate leaves our facility, it will complete the smelting and refining phases to separate the copper from other metals. The final result is a 99.999% pure copper cathode, which is an essential raw material for the processing industry. Copper originating from 7,000 ft below the surface will eventually find its way into electrical wiring, electronics, power generation and transmission, automotive applications, and antimicrobial medical products.

Our Work

One Shift, One Team: A Big Win at 10 Shaft

At Resolution Copper, success isn’t just measured in tons moved or hours logged. It’s in how we show up for each other, work together, and take pride in doing things the right way.

Celebrating Indigenous Youth at NABI 2025

Resolution Copper was proud to return as Presenting Sponsor of the 2025 Native American Basketball Invitational (NABI) — and this year was the biggest one yet. With 204 Native American basketball teams representing over 160 Tribal Nations and competing in more than 500 games, NABI 2025 brought together young Indigenous athletes from across the U.S. for a week of competition, connection, and community.

Cultural Commitments: Preserving What Matters Most

At Resolution Copper, we believe cultural stewardship begins with listening. For more than a decade, we’ve built relationships with Native American Tribes and local communities whose deep ties to the land shape how we move forward. This work isn’t finished, it’s ongoing. And it’s built on respect, collaboration, and trust.

Smarter Stewardship: Setting a New Standard for Land and Water Use

At Resolution Copper, mining is only part of the story. We are equally committed to protecting the land and water that sustain our operations and our communities.

Local Support for Resolution Copper: How Mining Is Building Opportunities

Mining is deeply rooted in Arizona’s Copper Triangle—and it’s driving the region’s next chapter. Local leaders across Superior, Miami, and Kearny are voicing their strong support for the Resolution Copper project.

Powering Economic Growth in Arizona

When people talk about Arizona’s economic future, Resolution Copper is part of that conversation. This project isn’t just about mining. It’s about building opportunities. It’s about putting Arizona’s people, resources, and innovation to work in a way that delivers real, lasting impact.

Resolution Copper welcomes the republication of the Final Environmental Impact Statement (FEIS)

Resolution Copper welcomes today’s republication of the Final Environmental Impact Statement (FEIS) by the U.S. Forest Service (USFS)—a positive step forward for the project. This republication allows the USFS to advance the congressionally mandated land exchange, enabling future underground mine development and placing thousands of acres of land into permanent conservation.

From Apprentice to Mentor: Powering the Future

At Resolution Copper, we’re not just building a mine. We’re investing in people and lifelong careers. Carlos’ mining journey started just a few miles from where he works today. A 2006 graduate of Superior High School, he grew up watching the legacy of mining shape his hometown. He didn’t wait long to jump in by 2007, he was underground, working on Shaft #9 with Cementation.

Statement attributable to Vicky Peacey, General Manager, Resolution Copper

We are pleased that the Ninth Circuit’s decision will stand. The Resolution Copper mine is vital to securing America’s energy future, infrastructure needs, and national defense with a domestic supply of copper and other critical minerals.