Company: RTNTF
Filing Date: 2025-02-20
Form Type: 20-F
Source: 0001628280-25-006642
Chunk: 446

Company: RIO TINTO LTD
Filing Date: 2025-02-20
Form: 20-F
Chunk 446
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 protections. |     | HistoryMount Tom Price began operations in 1966, followed by Paraburdooin 1974. During the 1990s, Channar (1990), Brockman 2 (1992),Marandoo (1994) and Yandicoogina (1998) achieved first ore.Nammuldi achieved first ore in 2006 followed by Brockman 4 (2010),Western Turner Syncline (2011) and Silvergrass (2017). The latestaddition to the network of Hamersley Iron mines, Gudai-Darri, hadfirst ore railed in December 2021, and commissioned its primarycrusher in the second quarter of 2022.Property description/type of mineAll mines operated by Rio Tinto within the property are open pitmines. The mining method employed uses conventional surfacemining, whereby shovels and loaders are used to load drilled andblasted material into trucks for removal to waste dumps andstockpiles or feed to process plants. In addition to mining activities,Rio Tinto conducts both exploration and development drilling acrossthe property.This Property is considered a production stage property forSK-1300 reporting purposes.Type of mineralisationBrockman 2, Brockman 4, Channar, Gudai-Darri, Tom Price,Paraburdoo and Western Turner Syncline: mineralisation occurs ashaematite/goethite within the banded iron formation of the BrockmanFormation. Detrital deposits also occur at these sites. At Brockman 2,Brockman 4, Tom Price and Western Turner Syncline, somegoethite/haematite within the banded iron formation of the MarraMamba Formation also occurs.Marandoo, Nammuldi and Silvergrass: mineralisation occurs as goethite/haematite within the banded iron formation of the Marra MambaFormation. Some detrital mineralisation also occurs.Yandicoogina: goethite mineralisation occurs as pisolite ores withinthe paleo-channel of a channel iron formation.Processing plants and other available facilitiesAt Brockman 2, Brockman 4, the Nammuldi dry plant and Gudai-Darri,dry crushing and screening is used to produce lump and fines iron oreproducts. Ore from the Silvergrass and Nammuldi mines is blendedand processed through a wet scrubbing and screening plant, ahead ofdesliming