Excelsior Mining Corp.
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- Excelsior Mining Corp., now renamed Gunnison Copper Corp. as of November 2024, is a mineral exploration, development, and copper production company headquartered in Phoenix, Arizona. Founded in 2005, the company owns and operates key copper assets in Cochise County, Arizona, including the Gunnison Copper Project, the historic Johnson Camp Mine, and a portfolio of exploration projects such as the Peabody Sill and the Strong and Harris deposits. Its core operations focus on copper mining and production, leveraging advanced technologies for copper extraction and processing. The Gunnison Copper Project hosts copper oxide and sulfide mineralization with associated molybdenum, while the Johnson Camp Mine operates as a copper heap leach facility with an integrated solvent extraction and electrowinning (SX/EW) plant capable of producing 25 million pounds of copper cathode annually. Recent major company developments include the completion of all necessary permits to restart operations at the Johnson Camp Mine with construction commenced in 2024 and first copper production anticipated in the first half of 2025. Gunnison Copper is collaborating with Nuton LLC, a Rio Tinto technology venture, which is funding the project’s Stage 2 operational activities involving the deployment of Nuton's proprietary copper heap leaching technologies. Nuton has committed $5 million and will cover all associated costs for this phase, aiming to demonstrate the technology at an industrial scale over a five-year period. The company’s business operations are centered on copper production through in-situ recovery (ISR) methods and heap leaching using advanced hydrometallurgical processes. The Gunnison project features a solvent extraction/electrowinning (SX/EW) plant and an acid plant designed to recover copper from copper-laden solutions pumped from injection and recovery wells. This approach enables the company to efficiently produce copper cathodes with minimized environmental impact while focusing on resource expansion through exploration within its large land holdings in the Arizona copper porphyry belt. Gunnison Copper Corp. primarily operates within the minerals and mining industry segment in the United States, targeting industrial and commercial copper markets. The company remains in the development and early production phases as it advances copper extraction at its key assets, positioning itself for increased copper output through technological innovation and strategic partnerships in the rapidly evolving copper sector. It has not generated significant revenues historically but is poised to commence commercial production and scale output in the near term. Overall, Gunnison Copper Corp. represents a growing copper mining and production enterprise with a focus on innovative leaching technologies and strategic alliances, operating primarily in Arizona with plans for sustained development and production expansion in line with global copper demand growth. This description integrates the company's core products and services, recent corporate changes including its name change and partnership with Rio Tinto Nuton, and operational details relevant to investors or financial data users.
Gunnison Copper Announces Preliminary Economic Assessment of Open Pit Mining at its Flagship Gunnison Project in Arizona's Copper Belt
Excelsior Mining Announces Name Change to Gunnison Copper
Excelsior Mining Announces Dismissal of Purported Class Action Lawsuit
Excelsior Mining Receives Final Permit Required to Restart the Johnson Camp Mine
Excelsior Mining Signs Letter of Intent with Cochise College for Local Workforce Development Partnership
Excelsior Mining Provides Update on Johnson Camp Mine Construction in SE Arizona
Excelsior Mining Announces Hudbay Executive Craig Hallworth to Become Chief Financial Officer
Excelsior Mining Announces AGM Results
Excelsior Mining Announces Receipt of US$5 Million Payment Under Terms of Option Agreement with Nuton, a Rio Tinto Venture
Excelsior Mining Announces Option Agreement with Nuton, a Rio Tinto Venture Proceeds to Stage 2
Excelsior Mining Announces Closing of US$5,500,000 Financing
Excelsior Mining Announces Extension of Nebari Loan and US$5,500,000 Financing
Excelsior Mining Provides Update on Mining Activities at Gunnison and JCM Copper Projects
Excelsior Mining Announces Assay Results from JCM Stage 1 Drilling with Nuton, a Rio Tinto Venture
Excelsior Mining Announces Assay Results from JCM Stage 1 Drilling with Nuton, a Rio Tinto Venture
Excelsior Mining Announces Johnson Camp Stage 1 Drilling with Nuton, a Rio Tinto Venture
Excelsior Mining Announces Option Agreement with Nuton, a Rio Tinto Venture
Excelsior Mining to Present a Live-Video Webinar to Highlight the Newly Released Johnson Camp Mine PEA
Excelsior Mining Provides Update on Gunnison Copper Project, Johnson Camp Mine and Exploration Properties
Excelsior Mining Announces AGM Results