Lithium Triangle — subsurface mapping experience.

Overview

The Lithium Triangle — the area spanning parts of Chile, Argentina, and Bolivia — holds an estimated 50–60% of the world's identified lithium resources, with the richest concentrations in the closed-basin salars of the high Andes (>3,500 m elevation) where Tertiary volcanic activity, arid climate, and limited drainage have concentrated lithium-bearing brines over geological timescales.

Across the three countries, conditions for exploration and development differ markedly. Chile has a centralized regulatory regime with strict environmental oversight and concentrated production around the Salar de Atacama. Argentina has a decentralized provincial model with multiple producing salars (Hombre Muerto, Olaroz, Rincon) and many more at various development stages. Bolivia retains state control of lithium resources, constraining commercial development.

Remote NMR mapping has been deployed across the Lithium Triangle for portfolio-scale brine concentration ranking, DLE pilot siting, and sedimentary-lithium target identification in younger basin-fill settings adjacent to the classic brine salars.

Mapping considerations

From a remote-mapping perspective, the Lithium Triangle presents both opportunities and technical challenges:

• High-contrast surface signatures. Salar surfaces are strongly reflective across visible and shortwave-infrared bands, which simplifies primary identification but complicates fine concentration discrimination through surface crust effects.
• Brine heterogeneity. Within a single salar, lithium concentration can vary 3–5× across lateral distances of a few kilometres. Portfolio-scale maps resolve this heterogeneity at the scale needed to rank DLE pilot sites.
• Sedimentary-adjacent targets are under-explored. Most historic work has concentrated on the salars themselves; sedimentary basin-fill targets adjacent to the classic brines are often commercially interesting and poorly characterized.
• High-altitude access constraints. Field crews operate at 3,500–4,500 m elevation, which adds logistical cost and time to every traditional exploration program. Remote surveys sidestep this entirely.

Typical use cases in this basin

• Portfolio-scale screening across multiple claim blocks in a single engagement
• Brine concentration ranking to prioritize drill sequence
• DLE pilot siting within known brine resources
• Sedimentary-lithium target identification adjacent to known salars
• Pre-bid acquisition diligence in claim-market transactions