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Cauchari (Rio Tinto) Development Not yet verified As of 25 Oct 2026
Owner Rio Tinto 100% (via South American Salars: Advantage Lithium 75%, La Frontera 25%, both 100% Rio Tinto); ex-Arcadium / Allkem Listed via RIO Product Brine Deposit type Brine Capacity Planning stage: potential 25 kt LCE/yr processing facility, 30-year life; Mineral Resource 6.0 Mt LCE, Ore Reserve 1.1 Mt LCE (30 Jun 2025, 100%) ≈ 25 kt LCE/yr (planned) Location -23.65°, -66.77° Southern Subbasin (Salar de Cauchari) of the Olaroz-Cauchari Salar complex, Jujuy. Distinct from cauchari-olaroz (Minera Exar: Ganfeng / Lithium Argentina) and from Rio's own olaroz (Sales de Jujuy). Location = planned NW-sector (Archibarca fan) wellfield and industrial area, from proposed well coor
Ownership structure Effective economic interest of listed owners · As of 25 Oct 2026
Attributable capacity Structure: Rio Tinto 100% (via South American Salars: Advantage Lithium 75%, La Frontera 25%, both 100% Rio Tinto); ex-Arcadium / Allkem.
Value chain Owners, buyers and the refineries on Li3atlas they feed · As of 25 Oct 2026 → Mine / resource Cauchari (Rio Tinto)Planning stage: potential 25 kt LCE/yr processing facility, 30-year life; Mineral Resource 6.0 Mt LCE, Ore Reserve 1.1 Mt LCE (30 Jun 2025, 100%)
Country risk · Argentina Policy risk: Medium As of 24 Oct 2026 Royalty Provincial royalty capped at 3% at the mine mouth; Catamarca and Salta have legislated up to 5% RIGI investment regime covers lithium and cuts the effective tax rate (Fundar model for a Salta project: 42.8% to 30.4%). source
Change history Approved changes with their source · As of 25 Oct 2026 All (1)
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