Marathon Copper-Palladium Project Feasibility Study: C$1.07B NPV, 28% IRR
Generation Mining Limited's Marathon Copper-Palladium Project in Northwestern Ontario, Canada has a Feasibility Study outlining an after-tax NPV of C$1.07B, an after-tax IRR of 28%, and initial capital of C$992M. The proposed mine plan runs 13 years.
Generation Mining Limited's Marathon Copper-Palladium Project has reported Feasibility Study results for the copper, palladium project in Northwestern Ontario, Canada. The study headlines an after-tax net present value of C$1.07B at a 6% discount rate. It reflects Generation Mining Limited's (GENM.TO) latest disclosed economics for the asset.
Economics. The after-tax NPV is C$1.07B using a 6% discount rate. After-tax IRR is 28%. Initial capital expenditure is estimated at C$992M, with life-of-mine sustaining capital of C$565M. The study models a payback period of 1.9 years. All-in sustaining costs are pegged at 781 USD/PdEq oz. Economics are based on FS: US$1,525/oz Pd, US$4.00/lb Cu, US$950/oz Pt, US$2,000/oz Au, US$24/oz Ag; FX USD1:CAD1.35. Spot (May 12, 2026): Cu $6.49/lb, Ag $83.64/oz, Au $4,678/oz, Pt $2,116/oz, Pd $1,489/oz; FX USD1:CAD1.37.
Production and mine plan. The project envisions an open-pit operation. Life of mine is 13 years. The open-pit strip ratio is 2.8.
These figures are extracted from Generation Mining Limited's technical disclosures and reflect the most recent Feasibility Study on file. Compare this project against other developers and producers in our project economics database, and always verify the numbers against the original technical report before making any investment decision.
Reserves & Resources
| Category | Tonnage | Grade | Contained |
|---|---|---|---|
| Proven | 115.5 Mt | 0.66 g/t Pd, 0.22% Cu, 0.20 g/t Pt, 0.07 g/t Au, 1.7 g/t Ag | 2,434 koz Pd, 549 M lbs Cu, 754 koz Pt, 264 koz Au, 6,242 koz Ag |
| Probable | 12.7 Mt | 0.47 g/t Pd, 0.20% Cu, 0.15 g/t Pt, 0.06 g/t Au, 1.6 g/t Ag | 193 koz Pd, 56 M lbs Cu, 61 koz Pt, 26 koz Au, 635 koz Ag |
| Proven & Probable | 128.3 Mt | 0.64 g/t Pd, 0.21% Cu, 0.20 g/t Pt, 0.07 g/t Au, 1.7 g/t Ag | 2,627 koz Pd, 605 M lbs Cu, 815 koz Pt, 291 koz Au, 6,877 koz Ag |
| Category | Tonnage | Grade | Contained |
|---|---|---|---|
| Measured | 164.0 Mt | 0.56 g/t Pd, 0.20% Cu, 0.18 g/t Pt, 0.07 g/t Au, 1.7 g/t Ag | 2,973 koz Pd, 712 M lbs Cu, 970 koz Pt, 358 koz Au, 9,089 koz Ag |
| Indicated | 80.1 Mt | 0.41 g/t Pd, 0.21% Cu, 0.13 g/t Pt, 0.06 g/t Au, 1.5 g/t Ag | 1,066 koz Pd, 379 M lbs Cu, 339 koz Pt, 152 koz Au, 3,814 koz Ag |
| Measured & Indicated | 244.1 Mt | 0.51 g/t Pd, 0.20% Cu, 0.17 g/t Pt, 0.06 g/t Au, 1.6 g/t Ag | 4,039 koz Pd, 1,091 M lbs Cu, 1,309 koz Pt, 510 koz Au, 12,903 koz Ag |
| Inferred | 29.8 Mt | 0.39 g/t Pd, 0.22% Cu, 0.10 g/t Pt, 0.05 g/t Au, 1.4 g/t Ag | 370 koz Pd, 147 M lbs Cu, 94 koz Pt, 44 koz Au, 1,374 koz Ag |
Our Analysis
The 28% after-tax IRR lands in the lower half of our tracked peer set but clears the practical financing hurdle for a single-asset junior developer by a wide margin. The 6% discount rate is unusually low, which inflates the C$1.07B NPV—a more typical rate would compress that figure materially. The NPV-to-market-cap ratio of roughly 4.9x is the central tension: it could signal the market has not yet priced in the project’s potential, or it could reflect skepticism about financing, permitting, or execution risk for a junior developer in a remote Ontario setting.
Initial capex of C$992M is 93% of NPV, a moderately capital-intensive profile that creates meaningful funding risk given the company’s small market cap. The 1.9-year payback is fast, which helps offset that risk, but the 13-year mine life is short for a copper-palladium asset, limiting long-term cash flow visibility. The single most important watch-item is the financing gap: raising nearly C$1B against a modest equity base will likely require significant dilution or a partner, and the jurisdiction—while mining-friendly—does not eliminate that hurdle.
Our take, benchmarked against the project economics in the Mining Stocks database. Figures are estimates drawn from company technical reports — not investment advice; always verify against the source filing.