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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 (% Cu) | Contained (Mt Cu) | As at |
|---|---|---|---|---|
| Measured | 291.40 Mt | 0.63% | 1.84 Mt Cu | 31 Dec 2025 |
| Indicated | 1,001.80 Mt | 0.56% | 5.61 Mt Cu | 31 Dec 2025 |
| M&I = Measured + Indicated (overlaps both) | 1,293.20 Mt | 0.57% | 7.37 Mt Cu | 31 Dec 2025 |
| Inferred | 1,215.90 Mt | 0.47% | 5.71 Mt Cu | 31 Dec 2025 |
| Total Resources | 2,509.10 Mt | 0.52% | 13.16 Mt Cu | 31 Dec 2025 |
| Proved | — | — | — | — |
| Probable | — | — | — | — |
| Total Reserves | — | — | — | — |
M&I is the issuer's printed Measured + Indicated subtotal — it overlaps the Measured and Indicated rows and is never added alongside them; the Total rows and every rollup already exclude it.
| Category | Tonnes (Mt) | Grade (% Ni) | Contained (Mt Ni) | As at |
|---|---|---|---|---|
| Measured | 291.40 Mt | 0.20% | 0.58 Mt Ni | 31 Dec 2025 |
| Indicated | 1,001.80 Mt | 0.18% | 1.80 Mt Ni | 31 Dec 2025 |
| M&I = Measured + Indicated (overlaps both) | 1,293.20 Mt | 0.18% | 2.33 Mt Ni | 31 Dec 2025 |
| Inferred | 1,215.90 Mt | 0.16% | 1.95 Mt Ni | 31 Dec 2025 |
| Total Resources |
Percentile of this project's current total Resource among covered peers (P100 = largest / highest grade). Basis and Inferred toggles apply.
| Area | Category | Tonnes (Mt) | Cu | Ni | As at | Source | Provenance | ||
|---|---|---|---|---|---|---|---|---|---|
| Grade (% Cu) | Contained (Mt Cu) | Grade (% Ni) | Contained (Mt Ni) | ||||||
| Total | Measured | 291.40 Mt | 0.63% | 1.84 Mt Cu | 0.20% | 0.58 Mt Ni | 31 Dec 2025 | 258Unverified | |
| 0.17% |
| 4.33 Mt Ni |
| 31 Dec 2025 |
| Proved | — | — | — | — |
| Probable | — | — | — | — |
| Total Reserves | — | — | — | — |
M&I is the issuer's printed Measured + Indicated subtotal — it overlaps the Measured and Indicated rows and is never added alongside them; the Total rows and every rollup already exclude it.
notes (5)Source: Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%) · published 26 Mar 2026 Ref: 258
QA notes:
|
| Total | Indicated | 1,001.80 Mt | 0.56% | 5.61 Mt Cu | 0.18% | 1.80 Mt Ni | 31 Dec 2025 | 258Unverified | notes (3)Source: Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%) · published 26 Mar 2026 Ref: 258
|
| Total | M&I = Measured + Indicated (overlaps both) | 1,293.20 Mt | 0.57% | 7.37 Mt Cu | 0.18% | 2.33 Mt Ni | 31 Dec 2025 | 258Unverified | notes (3)Source: Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%) · published 26 Mar 2026 Ref: 258
|
| Total | Inferred | 1,215.90 Mt | 0.47% | 5.71 Mt Cu | 0.16% | 1.95 Mt Ni | 31 Dec 2025 | 258Unverified | notes (3)Source: Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%) · published 26 Mar 2026 Ref: 258
QA notes:
|
| Total | Total Resources | 2,509.10 Mt | 0.52% | 13.16 Mt Cu | 0.17% | 4.33 Mt Ni | 31 Dec 2025 | Unverified | — |
| Birch Lake | Indicated | 90.40 Mt | 0.52% | 0.47 Mt Cu | 0.16% | 0.14 Mt Ni | 31 Dec 2025 | 258Unverified | notes (3)Source: Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%) · published 26 Mar 2026 Ref: 258
|
| Birch Lake | M&I = Measured + Indicated (overlaps both) | 90.40 Mt | 0.52% | 0.47 Mt Cu | 0.16% | 0.14 Mt Ni | 31 Dec 2025 | 258Unverified | notes (3)Source: Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%) · published 26 Mar 2026 Ref: 258
|
| Birch Lake | Inferred | 217.00 Mt | 0.46% | 1.00 Mt Cu | 0.15% | 0.33 Mt Ni | 31 Dec 2025 | 258Unverified | notes (3)Source: Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%) · published 26 Mar 2026 Ref: 258
QA notes:
|
| Maturi | Measured | 291.40 Mt | 0.63% | 1.84 Mt Cu | 0.20% | 0.58 Mt Ni | 31 Dec 2025 | 258Unverified | notes (5)Source: Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%) · published 26 Mar 2026 Ref: 258
QA notes:
|
| Maturi | Indicated | 818.30 Mt | 0.57% | 4.66 Mt Cu | 0.18% | 1.47 Mt Ni | 31 Dec 2025 | 258Unverified | notes (3)Source: Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%) · published 26 Mar 2026 Ref: 258
|
| Maturi | M&I = Measured + Indicated (overlaps both) | 1,109.70 Mt | 0.59% | 6.55 Mt Cu | 0.19% | 2.11 Mt Ni | 31 Dec 2025 | 258Unverified | notes (3)Source: Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%) · published 26 Mar 2026 Ref: 258
|
| Maturi | Inferred | 534.10 Mt | 0.50% | 2.67 Mt Cu | 0.16% | 0.85 Mt Ni | 31 Dec 2025 | 258Unverified | notes (3)Source: Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%) · published 26 Mar 2026 Ref: 258
QA notes:
|
| Maturi South West | Indicated | 93.10 Mt | 0.48% | 0.45 Mt Cu | 0.17% | 0.16 Mt Ni | 31 Dec 2025 | 258Unverified | notes (3)Source: Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%) · published 26 Mar 2026 Ref: 258
|
| Maturi South West | M&I = Measured + Indicated (overlaps both) | 93.10 Mt | 0.48% | 0.45 Mt Cu | 0.17% | 0.16 Mt Ni | 31 Dec 2025 | 258Unverified | notes (3)Source: Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%) · published 26 Mar 2026 Ref: 258
|
| Maturi South West | Inferred | 29.30 Mt | 0.43% | 0.13 Mt Cu | 0.15% | 0.04 Mt Ni | 31 Dec 2025 | 258Unverified | notes (3)Source: Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%) · published 26 Mar 2026 Ref: 258
QA notes:
|
| Spruce Road | Inferred | 435.50 Mt | 0.43% | 1.87 Mt Cu | 0.16% | 0.70 Mt Ni | 31 Dec 2025 | 258Unverified | notes (3)Source: Antofagasta plc - Annual Report and Financial Statements 2025, incl. Ore Reserves and Mineral Resources as at 31 Dec 2025 (subsidiaries 100% basis; Zaldivar 50%) · published 26 Mar 2026 Ref: 258
QA notes:
|
Rows are hierarchical, not additive — do not sum a column across rows. Whole-project rows (Area “Total”) already contain the indented named-area rows beneath them, and an issuer's printed per-deposit total can itself contain other listed areas. “M&I” is the issuer's printed Measured + Indicated subtotal: it overlaps the Measured and Indicated rows and is never added alongside them. All derived totals and rollups on this site already exclude the overlapping rows.