Arizona Mine Produces 99.999% Pure Copper for U.S. Data Centers - Without Smelters or Refineries
Blog post descripGunnison Copper's Johnson Camp Mine, backed by Rio Tinto and now supplying Amazon Web Services, is producing ultra-pure domestic copper using a bioleaching method that bypasses traditional industrial processing at a moment when U.S. data centers face a critical copper supply crunch.tion.
DURMUS EFE KOCH
5/21/20263 min read
Every AI data center built in the United States requires approximately 50,000 pounds of copper for electrical cables, transformer windings, printed circuit boards, and processor heat sinks. Every F-35 fighter jet requires 900 pounds. Every Tomahawk cruise missile requires 15. The United States imports nearly half of its copper, and a projected global shortfall of 300,000 tons is approaching. Against this backdrop, a small mining company in Arizona has demonstrated a way to produce exceptionally pure copper domestically, without the smelters and refineries that traditional mining requires.
The Johnson Camp Mine and Nuton Bioleaching Technology
Gunnison Copper Corp., listed on the Toronto Stock Exchange (TSX: GCU) and the OTCQB market (GCUMF), operates the Johnson Camp Mine in Cochise County, Arizona. The mine uses a technology developed by Nuton LLC, a venture of mining giant Rio Tinto, called bioleaching a process in which naturally occurring microorganisms are used to extract copper from ore that would otherwise be considered waste. The extracted copper is then refined onsite through a solvent extraction and electrowinning (SX/EW) process, producing copper cathode directly at the mine gate.
The result is copper of exceptional purity: 99.999% pure cathode. Unlike conventional copper mining, which requires ore to pass through concentrators, smelters, and refineries a supply chain that spans continents and takes months Gunnison's process compresses that chain to a single site. The company reports that Nuton technology uses substantially less water and generates lower carbon emissions than conventional methods, while also recovering value from material previously classified as waste.
Rio Tinto, Amazon Web Services, and the Data Center Supply Chain
In January 2026, Gunnison Copper announced that Rio Tinto had entered a strategic collaboration with Amazon Web Services (AWS) under which AWS would become Nuton Technology's first customer. AWS will use the first Nuton copper produced at Johnson Camp in components of its U.S. data centers, while providing cloud-based data and analytics support to accelerate the optimization of Nuton's bioleaching process at the mine.
The announcement sent Gunnison's OTCQB-listed shares up 8.4% on the day of publication. The company subsequently released an updated Preliminary Economic Assessment (PEA) for its broader Gunnison Project a large-scale open-pit mine approximately two kilometers south of Johnson Camp which showed an after-tax net present value of approximately $2.0 billion at a base copper price of $4.60 per pound, with a 22.5% internal rate of return and a payback period of 3.9 years. The company also eliminated $15 million in secured debt during Q1 2026, reaching a debt-free position.
Strategic and Geopolitical Context
Gunnison's Gunnison Project is explicitly positioned to supply U.S. energy, data center, manufacturing, and defense supply chains. The company has received backing from the Defense Innovation Bridge Consortium (DIBC), a Pentagon-affiliated body focused on securing domestic critical mineral supply chains. This positioning is significant given the broader geopolitical context: the U.S. imports nearly half of its refined copper, and a 15% tariff on copper imports is scheduled to take effect in January 2027 under existing trade policy. A global supply shortfall of 300,000 tons is projected to compound these pressures.
References
Gunnison Copper Corp. (2026, January 15). Gunnison Copper announces that Rio Tinto and Amazon Web Services collaborate to bring low-carbon Nuton copper from Gunnison's Johnson Camp Mine to U.S. data centers [Press release]. https://www.gunnisoncopper.com/news/news-2026/gunnison-copper-announces-that-rio-tinto-and-amazon-web-serv2026-01-15-030502
Gunnison Copper Corp. (2026, May 20). Gunnison Copper reports first quarter 2026 financial and operational results [Press release]. https://www.stocktitan.net/news/GCUMF/gunnison-copper-reports-first-quarter-2026-financial-and-operational-wvlp5v8eemy3.html
Proactive Investors. (2026, January 15). Gunnison Copper to supply copper for AWS data centers under Rio Tinto collaboration. https://www.proactiveinvestors.com/companies/news/1085707/gunnison-copper-to-supply-copper-for-aws-data-centers-under-rio-tinto-collaboration-1085707.html
Note: The social media post (exliqmedia) referenced in this article was produced on behalf of Gunnison Copper Corp. and sponsored by the company via Cashu Group.
This article is not financial advice.
