Major U.S. Copper-Gold Deposit Moves Toward Dedicated Listing
Undeveloped copper deposits of scale inside the United States are rare. Finding the combination of grade, size, and domestic jurisdiction that makes an asset genuinely strategic is even scarcer. Today, one explorer announced it is consolidating its position around one of the country’s most significant undeveloped porphyry systems.
Cambria Gold Mines Inc. (TSX Venture: CAMB)(OTCID: AOTVF) announced the completion of additional claim staking at its Mt. Margaret copper-gold porphyry deposit near Randle, Washington. Approximately 7 km2 of new unpatented lode claims now surround the company's existing patented federal claims, significantly expanding the controlled footprint. Parallel to the expansion, the company announced its intention to spin out Mt. Margaret into a new U.S.-focused listed entity in the near future.
The deposit features a substantial exploration history, including 105 diamond drill holes totalling 20,729m drilled by Duval Corporation between 1971 and 1980. This work produced a historical resource estimate of 577M tonnes grading 0.36% Cu, 0.24 g/t Au, 0.011% Mo, and 1.58 g/t Ag.
A 2010 infill program by the company’s predecessor produced some consistent results, highlighted by 496.0m at 0.459% Cu, 500m at 0.337% Cu, and 343.85m at 0.507% Cu. These wide, near-surface intercepts often ended in mineralization more than 400m below surface, confirming that the system remains open at depth.
The timing of the spin-out is driven by a shift in U.S. domestic policy. The government is actively prioritizing domestic critical mineral supply, with copper identified as a primary requirement for grid infrastructure, EV manufacturing, and defense systems. A large, near-surface porphyry deposit in Washington State, supported by active federal engagement, represents a strategic asset class that is attracting attention in 2026.
CAMB is trading at C$1.77, up 23% today.
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