Company: RTNTF
Filing Date: 2025-02-20
Form Type: 20-F
Source: 0001628280-25-006642
Chunk: 461

Company: RIO TINTO LTD
Filing Date: 2025-02-20
Form: 20-F
Chunk 461
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, Rio Tintoand First Quantum Minerals announced the completion of atransaction that will work to unlock the development of theLa Granja project. Under the terms of the transaction,First Quantum Minerals acquired a 55% interest in theproject and became the project operator, assuming all keypermit obligations. |     | Property description/type of mineLa Granja is currently undergoing technical studies andengagement with host communities, local and nationalgovernments focused on development of a potential open pitmining operation.This Property is considered an exploration stage property forSK-1300 reporting purposes.Type of mineralisationPorphyry copper and associated skarn deposits, with highgrade breccias with minor silver, and molybdenum.Processing plants and other available facilitiesLa Granja comprises an exploration camp and water treatmentinfrastructure.Power sourceCurrently powered by diesel generators. An upgraded powersupply is required for development of the asset. |

| Annual Report on Form 20-F 2024 | 310 | riotinto.com |

Production, Mineral Reserves, Mineral Resources and operations | Mines and production facilities

Group mines as at 31 December 2024 Minerals Production properties

| PropertyRio Tinto Borates –BoronOwnership100% Rio TintoOperatorRio TintoLocationBoron, California, US                                                                                   |     | Access and infrastructureRoad and rail.Title/lease/acreageLand holdings include 13,493 acres (owned, including mineralrights) for the mining operation, plant infrastructure and tailingsstorage facility.Key permit conditionsBoron operations currently have all State and Federalenvironmental and operational permits in place to continue themining and processing operation. Regular updates to permitsare ongoing.HistoryDeposit discovered in 1906, underground mining operationsbegan in 1925, 3 underground mining operations wereconsolidated and the mining method switched to open pitmining in 1956. Assets were acquired by Rio Tinto in 1967.                                                                 |     | Property description/type of mineOpen pit.This Property is considered a production stage property forSK-1300 reporting purposes.Type of mineralisationSedimentary sequence of tincal and kernite containinginterbedded claystone enveloped by facies consisting of ulexiteand colemanite bearing claystone, and barren claystone.Processing plants and other available facilitiesBoron operations consists of the open pit mine, an ore crushingand conveying system, 2 process plants (Primary Process andBoric Acid Plant), shipping facility and tailings storage facilities.Power sourceOn-site co-generation