Mine / resource · Argentina

Cauchari (Rio Tinto)

DevelopmentNot yet verifiedAs 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
Rio TintoRIO100%Cauchari (Rio Tinto)Mine / resource

Attributable capacity

Listed ownerStakekt LCE/yr
Rio Tinto RIO100%≈25

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 / resourceCauchari (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%).

Change history

Approved changes with their source · As of 25 Oct 2026
DateFieldChangeSource
25 Oct 2026Notesnew: Added to Li3atlas: Cauchari (Rio Tinto)

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