Contango Silver & Gold Inc.
For the period ended Sep 22, 2026. Filed Sep 22, 2026.
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Sep 22, 2026 · Filed Sep 22, 2026
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EX-99.3 · Density Assignment
Density Assignment
Bulk-density measurements were obtained from intact drill-core specimens using the Archimedes water-immersion method. Core was weighed in air and submerged in water; density was calculated from the mass in air divided by the difference between the air and submerged masses. The reported BULK_DENS and SG_FIELD values were used in the statistical review, with recalculated densities retained as a quality-control check where both mass measurements were available. Numerically, g/cm³ and t/m³ are equivalent.
The reviewed populations support validation but do not automatically represent the volume-weighted density of the final mineralized domains. Historical and current counts overlap and are not additive. Changes in count are not identified as new measurements without reconciliation of sample identifiers, dates and domain membership. Table 11-5 summarizes the screened density measurements, supporting drill holes, screened mean densities and resource density assignments for each deposit.
Table 11-5. Density measurement support and resource assignments
| Deposit | Screened measurements | Supporting holes | Screened mean (t/m³) | Resource density (t/m³) |
|---|---|---|---|---|
| Homestake Main | 926 | 48 | 2.759 | 2.77 |
| Homestake Silver | 2612 | 51 | 2.751 | 2.77 |
| South Reef | 77 | 14 | 2.970 | 3.01 |
| Wolf | 31 | 15 | 2.898 | 2.90 |
| Kitsol | 33 | 11 | 2.890 | 3.00 |
| Torbrit | 389 | 72 | 3.337 | 3.10 |
| Dolly Varden | 156 | 22 | 2.977 | 3.00 |
| North Star | 0 | – | – | 3.00² |
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