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Whole-project rollup at the latest vintage per category: printed project-level rows are preferred, and mining areas are summed (tonnes-weighted grade) only where the issuer prints no project-level row. Per-area and per-source detail in the Current R&R table below.
| Category | Tonnes (Mt) | Grade (g/t Au) | Contained (Moz Au) | As at |
|---|---|---|---|---|
| Measured | 2.20 Mt | 5.08 g/t | 0.36 Moz | 01 Dec 2025 |
| Indicated | 1.86 Mt | 4.54 g/t | 0.27 Moz | 01 Dec 2025 |
| Inferred | 0.40 Mt | 4.04 g/t | 0.05 Moz | 01 Dec 2025 |
| Total Resources | 2.52 Mt | 4.68 g/t | 0.38 Moz | 01 Dec 2025 |
| Proved | 1.05 Mt | 5.06 g/t | 0.17 Moz | 01 Dec 2025 |
| Probable | 0.88 Mt | 4.61 g/t | 0.13 Moz | 01 Dec 2025 |
| Total Reserves | 1.93 Mt | 4.87 g/t | 0.30 Moz | 01 Dec 2025 |
Sub-category rows are as disclosed (no Reserves-treatment netting); the Total rows honour the Resources treatment and Inferred-policy toggles, so components may not sum to the Total.
Dotted tonnes/grade are derived under the active Resources treatment: tonnes are netted of (or grossed by) the reserve tonnage alongside contained, and grade is re-derived as netted contained ÷ netted tonnes — not the published figures.
Percentile of this project's current total Resource among covered peers (P100 = largest / highest grade). Basis and Inferred toggles apply.
| Category | Tonnes (Mt) | Au | As at | Source | Provenance | |
|---|---|---|---|---|---|---|
| Grade (g/t Au) | Contained (Moz Au) | |||||
| Measured | 2.20 Mt | 5.08 g/t | 0.36 Moz | 01 Dec 2025 | Table 3 – Copperstone Mineral Resource estimate, effective December 1, 2025Unverified | |
notes (5)Source: Minera Alamos Announces Positive Pre-Feasibility Study for the Copperstone Gold Project in Arizona · published 27 May 2026 Ref: Table 3 – Copperstone Mineral Resource estimate, effective December 1, 2025
QA notes:
|
| Indicated | 1.86 Mt | 4.54 g/t | 0.27 Moz | 01 Dec 2025 | Table 3 – Copperstone Mineral Resource estimate, effective December 1, 2025Unverified | notes (5)Source: Minera Alamos Announces Positive Pre-Feasibility Study for the Copperstone Gold Project in Arizona · published 27 May 2026 Ref: Table 3 – Copperstone Mineral Resource estimate, effective December 1, 2025
QA notes:
|
| Inferred | 0.40 Mt | 4.04 g/t | 0.05 Moz | 01 Dec 2025 | Table 3 – Copperstone Mineral Resource estimate, effective December 1, 2025Unverified | notes (5)Source: Minera Alamos Announces Positive Pre-Feasibility Study for the Copperstone Gold Project in Arizona · published 27 May 2026 Ref: Table 3 – Copperstone Mineral Resource estimate, effective December 1, 2025
QA notes:
|
| Total Resources | 2.52 Mt | 4.68 g/t | 0.38 Moz | 01 Dec 2025 | derived from 3 rows | — |
| Category | Tonnes (Mt) | Au | As at | Source | Provenance | |
|---|---|---|---|---|---|---|
| Grade (g/t Au) | Contained (Moz Au) | |||||
| Proved | 1.05 Mt | 5.06 g/t | 0.17 Moz | 01 Dec 2025 | Table 4 – Copperstone Mineral Reserve estimate, effective December 1, 2025Unverified | notes (4)Source: Minera Alamos Announces Positive Pre-Feasibility Study for the Copperstone Gold Project in Arizona · published 27 May 2026 Ref: Table 4 – Copperstone Mineral Reserve estimate, effective December 1, 2025
QA notes:
|
| Probable | 0.88 Mt | 4.61 g/t | 0.13 Moz | 01 Dec 2025 | Table 4 – Copperstone Mineral Reserve estimate, effective December 1, 2025Unverified | notes (4)Source: Minera Alamos Announces Positive Pre-Feasibility Study for the Copperstone Gold Project in Arizona · published 27 May 2026 Ref: Table 4 – Copperstone Mineral Reserve estimate, effective December 1, 2025 |
| Total Reserves | 1.93 Mt | 4.87 g/t | 0.30 Moz | 01 Dec 2025 | Table 4 – Copperstone Mineral Reserve estimate, effective December 1, 2025Unverified | notes (4)Source: Minera Alamos Announces Positive Pre-Feasibility Study for the Copperstone Gold Project in Arizona · published 27 May 2026 Ref: Table 4 – Copperstone Mineral Reserve estimate, effective December 1, 2025 |
Dotted Total-row tonnes/grade are derived under the active Resources treatment: tonnes netted of (or grossed by) the reserve tonnage alongside contained, grade re-derived as netted contained ÷ netted tonnes — not the published figures.