Company: RTNTF
Filing Date: 2025-02-20
Form Type: 20-F
Source: 0001628280-25-006642
Chunk: 440

Company: RIO TINTO LTD
Filing Date: 2025-02-20
Form: 20-F
Chunk 440
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 | riotinto.com |

Production, Mineral Reserves, Mineral Resources and operations | Mineral Resources

|                                                               | Likely miningmethod1 | Measured Mineral Resourcesas at 31 December 2024 |          |       | Indicated Mineral Resourcesas at 31 December 2024 |          |     |
| Tonnage                                                       | Grade                |                                                  |  Tonnage | Grade |                                                   |          |     |
| Titanium dioxide feedstock2 3                                 | Mt                   |                                    % Ti minerals | % Zircon |    Mt |                                     % Ti minerals | % Zircon |     |
| QIT Madagascar Minerals (QMM) (Madagascar)                    | O/P                  |                                              356 |      4.3 |   0.2 |                                               318 |      4.0 | 0.2 |
| Richards Bay Minerals (RBM) (South Africa)                    | O/P                  |                                                — |        — |     — |                                                 7 |     12.0 | 8.0 |
| Rio Tinto Iron and Titanium (RTIT) Quebec Operations (Canada) | O/P                  |                                               19 |     82.0 |     — |                                                 9 |     81.8 |   — |
| Total titanium dioxide feedstock                              |                      |                                              375 |      8.3 |   0.2 |                                               334 |      6.2 | 8.2 |

1. Likely mining method: O/P = open pit/surface. 2. Titanium dioxide feedstock Mineral Resources are reported as dry in situ tonnes. 3. QMM and RBM Mineral Resources valuations are based on commodity prices of US$228.35/t for 53% titanium dioxide product and US$1,587.65/t for 66.5% zircon oxide, adjusted for specific products produced. RTIT Quebec Operations Mineral Resources valuations are based on a commodity price of US$228.35/t for 53% titanium dioxide product adjusted for specific products produced. These prices are sourced from TZMI.

| Annual Report on Form 20-F 2024 | 297 | riotinto.com |

Production, Mineral Reserves, Mineral Resources and operations | Mineral Resources

| Total Measured and Indicated MineralResources as at 31 December 2024 |               |          | Inferred Mineral Resourcesas at 31 December 2024 |               |          | Rio Tintointerest |
| Tonn