Porcupine operations

Mineral Resources

The Mineral Resource estimates provided below are taken from the technical report entitled, “Porcupine Complex, Ontario, Canada, Technical Report on Preliminary Economic Assessment”, with an effective date of January 13, 2025. The technical report is available on this website and at www.sedarplus.ca. The Mineral Resources listed below are not Mineral Reserves and, as such, do not have demonstrated economic viability.

Notes:

• Mineral Resources are reported in situ, using the 2014 CIM Definition Standards. Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability.
• Mineral Resources have an effective date of 3 December, 2024. The Qualified Person for the Borden, Hoyle Pond and Pamour estimates is Mr. Eric Kallio, P.Geo., an independent Qualified Person. The Qualified Person for the Dome estimate is Dr. Ryan Barnett, P.Geo., an employee of Resource Modelling Solutions.
• Mineral Resources that are considered amenable to underground mining methods at Borden are constrained within conceptual mineable shapes that use the following input parameters: gold price of US$2,000/oz Au, mining costs of US$120.08/t mined, process costs of US$18.30/t processed, general and administrative costs of US$31.58/t processed, variable metallurgical recoveries by mining zone ranging from 81.08–93.64%, refining costs of US$0.98/oz Au, dilution percentages that vary by mining zone, ranging from 18–25%, and a 4.6% royalty. Mineral Resources are reported at varying cut-off grades by mining zone, ranging from 3.3–4.2 g/t Au.
• Mineral Resources that are considered amenable to open pit mining methods at Dome are constrained within a pit shell that uses the following input parameters: gold price of US$2,000/oz Au, mining costs of US$3.85/t mined, process costs of US$18.75/t processed, general and administrative costs of US$3.86/t processed, average 91% metallurgical recovery, refining costs of US$0.94/oz Au, and pit slope angles of 45º. Mineral Resources are reported above a 0.40 g/t Au cut-off.
• Mineral Resources that are considered amenable to underground mining methods at Hoyle Pond are constrained within conceptual stope designs that use the following input parameters: gold price of US$2,000/oz Au, mining costs of US$371.55/t mined assuming longitudinal long-hole retreat methods and US$277.33/t mined assuming underhand cut-and-fill methods, process costs of US$45.01/t processed, general and administrative costs of US$47.05/t processed, average 94.3% metallurgical recovery, refining costs of US$0.98/oz Au, dilution percentages that vary by zone and mining method, ranging from 12–194%, and a royalty of 8.0%. The Mineral Resource estimate is reported at a cut-off grade of 12.3 g/t Au in the stopes assumed to be mined using longitudinal long-hole retreat methods and 6.05 g/t Au in the stopes assumed to be mined using underhand cut-and-fill.
• Mineral Resources that are considered amenable to open pit mining methods at Pamour are constrained within a pit shell that uses the following input parameters: gold price of US$2,000/oz Au, mining costs of US$5.50/t mined, process costs of US$23.70/t processed, general and administrative costs of US$10.47/t processed, average 91% metallurgical recovery, refining costs of US$0.94/oz Au, and pit slope angles of 25º in overburden and 45º in rock. Mineral Resources are reported above a 0.53 g/t Au cut-off.
• Estimates have been rounded. Grades and contained metal content are presented as weighted averages.
• The preliminary assessment is preliminary in nature and includes Inferred Mineral Resources that are considered too speculative to have the economic considerations applied to them that would enable them to be categorized as mineral reserves and there is no certainty that the preliminary economic assessment will be realized.