Osisko Metals Incorporated (TSX: OM | OTCQX: OMZNF) has released an updated Mineral Resource Estimate for its Gaspé Copper Project in eastern Québec, significantly expanding the scale of one of North America’s largest undeveloped copper projects following an extensive 118,000m drill campaign completed in 2025.
The updated base‑case, pit‑constrained estimate outlines Measured and Indicated resources of 1.83Bt at 0.27% copper (0.32% CuEq), containing approximately 10.8Blb (4.88Mt) of copper, along with 673Mlb of molybdenum and 93Moz of silver. This represents a 119% increase in contained copper metal compared with the previous Indicated Resource released in November 2024.
In addition, the project now hosts Inferred resources of 239Mt at 0.41% copper (0.46% CuEq), equating to a further 2.2Blb (0.98Mt) of contained copper, plus 83Mlb of molybdenum and 14Moz of silver. Osisko said the higher‑grade Inferred material sits largely to the south of the main deposit, providing clear growth and upgrade potential.
Robert Wares, CEO of Osisko Metals, commented, “We are very proud to announce this updated mineral resource estimate for Gaspé Copper. The 2025 drill program successfully converted and expanded the 2024 MRE to the Measured and Indicated categories and added new, higher‑grade Inferred resources to the south.”
Wares said Osisko will commence a 50,000m drill program later this month, aimed at upgrading remaining Inferred resources to the Indicated category and expanding the system toward the southwest in the direction of the former Needle Mountain open pit. A separate Deep Porphyry Exploration (DPEX) drill program is scheduled to begin in May to test the depth potential of the Porphyry Mountain area, with the goal of defining an Inferred resource for inclusion in a future MRE update.
Osisko also highlighted the potential to convert currently categorised in‑pit waste into additional mineralised material with further drilling around Needle Mountain.
Wares added that Gaspé Copper displays the characteristics of a “potential generational mine”, citing its scale, by‑product credits, established infrastructure and location in one of the world’s most stable mining jurisdictions. He noted the project could play a key role in Québec’s strategy to supply critical minerals needed for advanced technologies and global decarbonisation efforts.
With multiple drill programs planned for 2026, Osisko believes the Gaspé Copper Project remains well positioned for further growth, conversion and long‑term development.
To learn more about this, please visit https://osiskometals.com/
For more articles like this, please visit https://www.theassay.com/
