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

Resolution Copper Donates $285,000 to United Food Bank

Resolution Copper has donated $285,000 to Mesa-based United Food Bank to support the nonprofit’s mission and work in the Copper Corridor, tribal communities, and in the East Valley. The multi-year agreement through December 2028 comes at a critical time when there is record demand for food among all populations, including seniors and working families.

Can Recycling Alone Meet Copper Demand? Let’s Talk Facts

Copper is one of those materials most people never think about until they really need it. It’s inside your phone. Your laptop. Hospital equipment. Power grids. Electric vehicles. Even renewable energy systems.

From Geology Roots to Modern Mining: Ginger’s Journey

For Ginger, mining isn’t just a career. It is a way to honor her father’s passion for geology and the Arizona landscape he loved. More than 30 years ago, her dad, a hydrogeologist, moved the family to Arizona drawn to the region’s geology, water systems, and the potential beneath the surface. He passed away 20 years ago, but his curiosity stayed with her. “Working at the Resolution Copper project would have been a dream job for him,” she says. “Every time I go underground, I think of him. It feels like I’m walking the path he never got to take.”

Building Stronger Communities Together: December 2025

At Resolution Copper, our mission is to responsibly develop one of the world’s largest copper resources while creating lasting benefits for the communities around us. That means investing in education, supporting local economies, and partnering on initiatives that improve quality of life. Community engagement is not an add-on to our work. It is central to who we are and how we operate.

Volunteering: Making Every Hour Count

126 employees. 1,650 hours. One community. That’s what impact looks like in the Copper Triangle. This year, our team showed up for food banks, flood cleanups, classrooms, and local events. They gave time, care, and heart. And it mattered.

2025 Year-End Review: Progress, Partnership, and Purpose

As 2025 comes to a close, Resolution Copper reflects on a year defined by progress, collaboration, and a shared commitment to doing things the right way. From major operational milestones underground to meaningful investments in local communities, this year marked another important step forward in responsibly advancing one of the most significant copper projects in the United States.

Breaking Ground for WMAT Youth Courts

On November 14, we joined the White Mountain Apache Tribe to celebrate the start of a project that came straight from community voices. WMAT leaders asked for more spaces where kids could safely play outside. We listened. Together we built a plan to rehabilitate three basketball courts. One in East Fork and two in Cibecue.

2025 Supplier Awards: The Partners Behind Every Shift

Once a year, we bring those stories into one room. Our Supplier Award Lunch is where we say thank you. Since 2019, this event has celebrated suppliers and community partners who live our values of care, courage, and curiosity. In 2025, we recognized six partners who quietly make a big difference for our teams, our project, and the Copper Triangle.

Resolution Copper Donates $10,000 to Support Superior Families This Holiday Season

As families across Arizona prepare for the Thanksgiving and Christmas holidays, Resolution Copper is proud to support the Superior Food Bank with an additional $10,000 gift to help keep shelves stocked and ensure Superior residents have access to essential food and supplies during this time of year.