Lithium Argentina Expands Cauchari-Olaroz Resource Estimate; Supports Stage 2 Development Plan
Original announcement by tmx on
- Company
- Lithium Argentina AG
- Ticker
- LAR
- Exchange
- TSX
- Region
- Jujuy Province, Argentina
- Primary commodity
- Lithium
- Secondary commodities
- None reported
- Document categories
- Resource update, Production
- Extracted
- 2026-08-25 18:48:56 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Lithium Argentina has released an updated mineral resource and reserve estimate for the Cauchari-Olaroz project, headlined by a 42% increase in M&I LCE tonnage to 28.1 Mt. The update incorporates new drilling and a basin-wide hydrological model, supporting the company's Stage 2 expansion targets.
Reasoning: The update shows massive scale expansion in the Measured and Inferred categories, significantly de-risking the Stage 2 development plan despite a minor grade dilution.
Positive factors
- Significant M&I tonnage growth (42%)
- Massive Measured resource expansion
- Inferred resource doubling
- Supports Stage 2 expansion plans
Negative factors
- Slight grade decline in M&I and Measured categories
- Total P&P reserves decreased due to production depletion and capacity alignment
Facts used in scoring: 5
Classification and evidence
Tonnage Growthpositive
Significant tonnage increase (≥15%) vs prior estimate with grade maintained or improved.
Why it applies: M&I LCE tonnage increased by 42% compared to the 2019 estimate.
Evidence · text
“Increased Measured and Indicated (“M&I”) resource estimate by 42% to 28.1 Mt of LCE”
QP/CP Signedpositive
Qualified Person (QP) or Competent Person (CP) named and signed off — a member of a recognized professional association (e.g., AusIMM, SME, AIG, P.Geo) with relevant experience.
Why it applies: Mark King, PhD. PGeo, FGC is named as the independent Qualified Person.
Evidence · text
“The independent Qualified Person for the 2026 Mineral Resource Estimate is Mark King, PhD. PGeo, FGC.”
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: A lithium grade cutoff of 300 mg/L is explicitly stated.
Evidence · text
“A lithium grade cutoff of 300 mg/L is used to define the Mineral Resource Estimates”
Extracted facts
Stored fact records: 5. Some facts used in scoring do not have a stored record.
Resource Estimates (5)
measuredlithiumTonnes: 16844844Grade: 557Grade Unit: mg/LContained Metal: 3164540Contained Unit: tonnesView all detailsHide details
Identity
- Commodity
- lithium
- Ticker
- LAR
Resource Data
- Category
- measured
- Tonnes
- 16844844
- Grade
- 557
- Grade Unit
- mg/L
- Contained Metal
- 3164540
- Contained Unit
- tonnes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-03-11T00:00:00.000Z
Reasoning: Measured LCE tonnage grew from 3.6 Mt to 16.8 Mt.
Positive factors
- Massive tonnage increase in Measured category
Negative factors
- Slight grade decline vs 2019
Evidence · table
“557”
Context: 5.89E+ 09
indicatedlithiumTonnes: 11299172Grade: 571Grade Unit: mg/LContained Metal: 2122708Contained Unit: tonnesView all detailsHide details
Identity
- Commodity
- lithium
- Ticker
- LAR
Resource Data
- Category
- indicated
- Tonnes
- 11299172
- Grade
- 571
- Grade Unit
- mg/L
- Contained Metal
- 2122708
- Contained Unit
- tonnes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-03-11T00:00:00.000Z
Reasoning: Indicated LCE tonnage decreased from 16.3 Mt to 11.3 Mt.
Negative factors
- Tonnage decline in Indicated category
Evidence · table
“571”
Context: 3.82E+ 09
inferredlithiumTonnes: 9614004Grade: 567Grade Unit: mg/LContained Metal: 1806125Contained Unit: tonnesView all detailsHide details
Identity
- Commodity
- lithium
- Ticker
- LAR
Resource Data
- Category
- inferred
- Tonnes
- 9614004
- Grade
- 567
- Grade Unit
- mg/L
- Contained Metal
- 1806125
- Contained Unit
- tonnes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-03-11T00:00:00.000Z
Reasoning: Inferred LCE tonnage increased from 4.7 Mt to 9.6 Mt.
Positive factors
- Significant Inferred tonnage growth
Evidence · table
“567”
Context: 3.24E+ 09
provenlithiumTonnes: 400000Grade: 588Grade Unit: mg/LContained Metal: 75315Contained Unit: tonnesView all detailsHide details
Identity
- Commodity
- lithium
- Ticker
- LAR
Resource Data
- Category
- proven
- Tonnes
- 400000
- Grade
- 588
- Grade Unit
- mg/L
- Contained Metal
- 75315
- Contained Unit
- tonnes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-03-11T00:00:00.000Z
Reasoning: Proven reserves increased due to longer period assigned to production.
Positive factors
- Proven reserves increased by ~45% vs 2019
Evidence · table
“588”
Context: 227,782,565
probablelithiumTonnes: 1000000Grade: 572Grade Unit: mg/LContained Metal: 190463Contained Unit: tonnesView all detailsHide details
Identity
- Commodity
- lithium
- Ticker
- LAR
Resource Data
- Category
- probable
- Tonnes
- 1000000
- Grade
- 572
- Grade Unit
- mg/L
- Contained Metal
- 190463
- Contained Unit
- tonnes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-03-11T00:00:00.000Z
Reasoning: Total reserves decreased as the model was updated to align with Stage 1 capacity.
Negative factors
- Total P&P reserves decreased vs 2019
Evidence · table
“572”
Context: 526,320,091
How Atlas produces this analysis
Minestarters Atlas uses automated extraction to summarize mining announcements, identify reported measurements, and classify supporting evidence. Sentiment reflects the extracted narrative and classification rules; it is an interpretation, not a reported measurement. Evidence quotes and context are provided where available. Missing data, low-confidence results, and review flags indicate limitations. Check the original publisher announcement before relying on an interpretation.