Copper Mining News in Colorado

Metallic Minerals Corp.
Metallic Minerals Corp.
MMG
Colorado

Metallic Minerals' La Plata Project Selected for U.S. DOE Genesis Mission AI Research Initiative Award Funding

Metallic Minerals' La Plata project has been selected as one of two initial test systems for the U.S. Department of Energy's Genesis Mission AI research initiative. The project, AGAPEX, aims to develop next-generation AI tools for critical minerals exploration using La Plata's extensive geological database. This collaboration provides the company with access to national-scale computing resources and validates the project's strategic importance.

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Metallic Minerals Corp.
Metallic Minerals Corp.
MMG
Colorado, USA

Newmont Exercises Participation Rights to Purchase Additional Shares of Metallic Minerals

Metallic Minerals Corp. has completed a $902,916 non-brokered private placement with Newmont Corporation to fund exploration at the La Plata project. The company also announced an updated 2026 NI 43-101 Mineral Resource Estimate for La Plata, which now includes platinum, palladium, and gold, expanding the Inferred resource to 181.4 Mt at 0.36% CuEq.

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Viscount Mining Corp.
Viscount Mining Corp.
VML
Colorado

Viscount Mining Corp. Advances High-Potential Passiflora Discovery with Strategic Airborne Survey Contract with Rosor Exploration in Silver Cliff, Colorado

Viscount Mining Corp. has contracted Rosor Exploration for a high-resolution airborne EM and magnetic survey at its Silver Cliff Project in Colorado. The company also highlighted recent discovery drilling at the Passiflora target, which intersected 843.9 metres of continuous gold-copper mineralization averaging 0.214% CuEq.

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Metallic Minerals Corp.
Metallic Minerals Corp.
MMG
Colorado, USA

Metallic Minerals Announces Filing of NI 43-101 Technical Report for the La Plata Project Mineral Resource Estimate, Colorado, USA

Metallic Minerals has filed an NI 43-101 technical report for the La Plata Project in Colorado, featuring an updated Mineral Resource Estimate. The Inferred resource has expanded to 181.4 Mt at 0.36% CuEq, now incorporating platinum, palladium, and gold for the first time.

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Metallic Minerals Corp.
Metallic Minerals Corp.
MMG
Colorado
Metallurgical Results

Metallic Minerals Reports Successful Electrochemical Recovery of 99.9% Pure Copper Metal from La Plata Sulphide Mineralization

Metallic Minerals Corp. has demonstrated a proof-of-concept electrochemical oxidative leaching process that recovers 99.9% pure copper from La Plata sulphide material at ambient temperatures. The process achieves approximately 70% copper recovery and naturally partitions silver, gold, PGEs, and REEs into a solid residue for potential secondary recovery.

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Metallic Minerals Corp.
Metallic Minerals Corp.
MMG
Colorado
Resource Estimate

Metallic Minerals Expands La Plata Copper-Silver Inferred Resource by 23% and Adds Platinum, Palladium and Gold

Metallic Minerals has updated its La Plata project's Allard deposit Inferred Resource, expanding tonnage by 23% to 181.4 Mt. The update includes the addition of platinum, palladium, and gold, resulting in a total copper-equivalent grade of 0.36% CuEq.

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Solitario Resources Corp.
Solitario Resources Corp.
SLR
Colorado

Solitario Adds Bright Angel Gold - Copper Project, Further Diversifying Its Property Portfolio

Solitario Resources Corp. has acquired the Bright Angel gold-copper project in Colorado. Initial surface reconnaissance sampling has returned high-grade copper and gold intercepts, including a sample with 8.45% Cu and 0.67 g/t Au.

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Viscount Mining Corp.
Viscount Mining Corp.
VML
Colorado

Viscount Strengthens Gold-Copper Porphyry Model at Passiflora as Multiple Exploration Datasets Align

Viscount Mining reports that integrated soil geochemistry, MT geophysics, and mapping data strengthen the gold-copper porphyry model at the Passiflora target. The company has defined a 2026 drill plan targeting both shallow breccia pipes and a deep conductive anomaly.

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Viscount Mining Corp.
Viscount Mining Corp.
VML
Colorado
Drill Results

Viscount Mining's Passiflora Discovery Drill Hole Intersects Robust Copper-Gold Porphyry System Over Entire 843.9 Metre Interval

Viscount Mining announced a pivotal early-stage discovery at its Passiflora porphyry target in Colorado, with the first deep drill hole intersecting 843.9 metres of continuous copper-gold mineralization averaging 0.214% CuEq. This intercept includes multiple higher-grade zones and confirms a robust copper-gold porphyry system within a large geophysical anomaly. The results are considered exceptional for early-stage exploration, with the system remaining open in all directions and at depth.

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Metallic Minerals Corp.
Metallic Minerals Corp.
MMG
southwest Colorado, USA

Metallic Minerals Announces Follow Up Exploration Results at its La Plata Project Including New Targets and High-Grade Rock Samples

Metallic Minerals announced positive surface rock sample results from its La Plata project in southwest Colorado, USA, identifying new priority targets and advancing existing ones to drill-ready status. The exploration program returned significant high-grade results, including samples up to 6.68% Cu Eq, 7.38% Cu, and 426 g/t Ag. The company also highlighted an upcoming updated mineral resource estimate for La Plata, incorporating recent drilling and expanded precious metal analyses.

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