Company: RTNTF
Filing Date: 2025-02-20
Form Type: 20-F
Source: 0001628280-25-006642
Chunk: 526

Company: RIO TINTO LTD
Filing Date: 2025-02-20
Form: 20-F
Chunk 526
---
 strategies as well as investment programs for the modernisation of the mining unit. Additional information can be found in Section 7 of the Escondida Technical Report Summary filed as exhibit 96.2 to the 2022 Form 20-F .

| Annual Report on Form 20-F 2024 | 349 | riotinto.com |

Additional information | US Disclosure Oyu Tolgoi Property Overview The Oyu Tolgoi property, which contains the Oyu Tolgoi project is located in the South Gobi region of Mongolia, approximately 645km by road south of the capital, Ulaanbaatar. Oyu Tolgoi is being developed by Oyu Tolgoi LLC and consists of a series of deposits containing copper, gold, and silver. Oyu Tolgoi consists of an open pit copper-gold mine and concentrator facilities and an underground block cave mine and related infrastructure. The Oyu Tolgoi copper-gold porphyry deposits are distributed along a 12km north-northeast striking corridor. From north to south, the deposits comprise Hugo North, Hugo South, Oyut, and Heruga. The Oyut deposit is currently mined as an open pit using a conventional drill, blast, load, and haul method. The Hugo North deposit is currently being developed as an underground mine. Rio Tinto holds a 66% interest in Oyu Tolgoi LLC following the purchase of Turquoise Hill Resources Ltd (TRQ) in 2022. The remaining 34% interest is held by the Government of Mongolia through Erdenes Oyu Tolgoi LLC. Oyu Tolgoi is centred at approximately latitude 43°00’45”N, longitude 106°51’15”E. For SEC reporting purposes Oyu Tolgoi is considered a production stage property. In addition to mining activities, Oyu Tolgoi conducts both exploration and development activities across the property. The location of the operations is shown in the location map and is centred around Latitude 43° 00' N, Longitude 106° 52'' E. History The existence of copper in the Oyu Tolgoi area has been recognised since the Bronze Age, but contemporary exploration for Mineral Resources did not begin until the 1980s, when a joint Mongolian and Russian geochemical survey team identified a molybdenum anomaly. In September 1996, geologists from the Magma Copper Company identified a porphyry copper leached cap over what is