Company: RTNTF
Filing Date: 2025-02-20
Form Type: 20-F
Source: 0001628280-25-006642
Chunk: 442

Company: RIO TINTO LTD
Filing Date: 2025-02-20
Form: 20-F
Chunk 442
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4 |         |              |      | Rio Tintointerest |
| Total brinevolume                                                     |   Grade | Lithiummetal |  LCE |                                Total brinevolume |   Grade | Lithiummetal |  LCE |                   |
| Mm3                                                                   | mg/L Li |           Mt |   Mt |                                              Mm3 | mg/L Li |           Mt |   Mt |                 % |
| 4,167                                                                 |     425 |         1.77 | 9.39 |                                            1,148 |     374 |         0.43 | 2.29 |             100.0 |

Diavik With the pending closure of Diavik, the majority of Mineral Resources have been downgraded to non-Resources. Rincon Mineral Resources were reported for the first time in 2024. A JORC Table 1 in support of this was released to the market on 4 December 2024 and can be viewed can be viewed at riotinto.com/resourcesandreserves .

| Annual Report on Form 20-F 2024 | 300 | riotinto.com |

Production, Mineral Reserves, Mineral Resources and operations | Mineral Resources Mineral Resources and Mineral Reserves governance and internal controls Rio Tinto has well-established governance processes and internal controls to support the generation and publication of Mineral Resources and Mineral Reserves, including a series of business unit and product group structures and processes independent of operational reporting. Audit & Risk Committee The Audit & Risk Committee’s remit includes the governance of Mineral Resources and Mineral Reserves. This includes an annual review of Mineral Resources and Mineral Reserves at a Group level, as well as a review of findings and progress from the Group Internal Audit program. Ore Reserves Steering Committee The Ore Reserves Steering Committee (ORSC), chaired by the Chief Technical Officer, Development & Technology, meets at least quarterly. The ORSC comprises senior representatives across our technical, financial, governance and business groups, and oversees the appointment of Qualified Persons nominated by the business units; reviews Exploration Results, Mineral Resources or Mineral Reserves releases prior to public reporting; and oversees the development of the Group Mineral Resources and Mineral Reserves standards and guidance. Orebody Knowledge Centre of Excellence The Orebody Knowledge Centre of Excellence contains a dedicated Orebody Knowledge Technical Assurance team. Orebody Knowledge Technical Assurance, in conjunction with the ORSC, is the guardian and author of Group Mineral Resources and Mineral Reserves standards and guidance, and is responsible for the governance and compilation of Group