Marathon Copper-Palladium Mine Feasibility Study: C$1.07B NPV, 28% IRR
Generation Mining Limited's Marathon Copper-Palladium Mine 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 mine plan runs 13 years at about 42 Mlbs Cu per year.
Generation Mining Limited's Marathon Copper-Palladium Mine 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/oz PdEq. 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.
Production and mine plan. The project envisions an open-pit operation. Life of mine is 13 years. Average annual production is approximately 42 Mlbs Cu. The open-pit strip ratio is 2.8.
Resources and ownership. The company holds a 100% interest in the project. Royalties and streams: C$240 Million Wheaton Precious Metals Stream.
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 Mlbs 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 Mlbs 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 Mlbs 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 Mlbs 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 Mlbs 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 Mlbs 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 Mlbs Cu, 94 koz Pt, 44 koz Au, 1,374 koz Ag |
Our Analysis
The 28% after-tax IRR places this project in the lower half of our tracked peer set, but it clears the practical financing hurdle for a single-asset junior developer by a comfortable margin. The 6% discount rate is low for a Canadian base-metals project, which flatters the C$1.07B NPV; a more typical rate would compress that figure meaningfully. The NPV-to-market-cap ratio of roughly 5.4x is wide: it could signal that the market has not yet priced in the project’s potential, or that investors are discounting financing, permitting, or execution risk in a single-asset structure.
Initial capex at 93% of NPV is moderately capital-intensive, and at C$992M it is large relative to the company’s market cap, creating clear dilution or funding risk for a developer. The 1.9-year payback is fast, which helps mitigate that risk. Northwestern Ontario is a mining-friendly jurisdiction, but the project’s reliance on a 13-year mine life and multiple by-product credits (Pd, Pt, Au, Ag) adds complexity. The single most important risk is financing: securing C$992M in initial capex for a junior with a market cap well below that figure will require significant equity dilution or a strategic partner.
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.