The setup
An Argentina-focused junior lithium explorer held eleven claim blocks across the northern Puna, totalling approximately 220,000 hectares. The portfolio had been assembled over three years of staking activity and included a mix of salar, salar-adjacent, and sedimentary targets.
The operational problem was capital sequencing. The company's 2026 drill budget stretched to roughly 2–3 of the eleven blocks, but the internal prospectivity ranking among the eleven was qualitative and contested. Three blocks had strong champions inside the team. Two had reasonable-but-unexcited support. Six had essentially no opinion either way because they were unscored.
The company engaged Inside Earth to run a portfolio-scale pre-drill screen and return an evidence-based ranking for all eleven blocks.
The approach
We scoped a single integrated engagement covering the full 220,000-hectare portfolio. Each block was mapped with the same methodology — multi-spectral acquisition, signature classification against our lithium-brine and lithium-sedimentary signature libraries, and NMR-based concentration indication. Where publicly-available assay data or prior surface-sampling existed, it was used as regional calibration.
The deliverable was a per-block concentration heatmap plus an overall ranking table with indicated lithium concentration bands (<200 mg/L, 200–500 mg/L, 500–1,000 mg/L, >1,000 mg/L) per sub-area.
The result
The ranking materially changed the company's priority order:
- One of the three "champion" blocks dropped to 6th on the new ranking — the indicated concentrations were in the 200–500 mg/L band across most of the block, rather than the >500 mg/L band the team had hoped for.
- One of the six unscored blocks rose to 2nd on the ranking — indicated concentrations reached the >1,000 mg/L band in a central fairway covering roughly a third of the block.
- The company's existing DLE pilot, already sited on the top-ranked block, was indicated to be approximately 1,100 metres from a higher-concentration interval within the same claim.
On the strength of the screen, the company re-sequenced its 2026 drill program to focus on the new #1 and #2 blocks, deferred the deprioritized champion block, and initiated an amendment to the DLE pilot siting to relocate it ~1.1 km to the higher-concentration interval.
What happened next
The first two drill programs under the revised plan went into the field in late 2026 (at the time of writing, Q1 2026 actuals are not yet available). Initial assay results are expected mid-2026 and will be disclosed via the company's standard public reporting channels.
What this case illustrates
This engagement is an example of the portfolio-scale screening pattern described in Lithium exploration in 2026. The operational impact is not individual-well precision — it's capital sequencing across a portfolio too large to drill-evaluate in any reasonable timeframe.
For a junior explorer with a multi-year timeline and finite drill capital, the difference between drilling the right block first and drilling the third-best block first is usually the difference between delivering a maiden resource on schedule and slipping 18–24 months.
Identifying details
This case study is based on a real Inside Earth engagement. Operator identity, exact claim geometry, and financial details have been anonymized per NDA. Order-of-magnitude numbers reflect the engagement; exact figures vary within the stated ranges.