Lara Exploration Announces Filing of the Preliminary Economic Assessment for its Planalto Copper-Gold Project in Brazil
Original announcement by tmx on
- Company
- Lara Exploration Ltd.
- Ticker
- LRA
- Exchange
- TSX
- Region
- Brazil
- Primary commodity
- Copper
- Secondary commodities
- Gold
- Document categories
- Metallurgy, Other
- Extracted
- 2026-09-12 11:28:45 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Lara Exploration has filed a Preliminary Economic Assessment (PEA) for its Planalto Copper-Gold Project in Brazil. The study indicates an 18-year mine life with estimated production of 560 kt of copper and 111 koz of gold, supported by an after-tax NPV of US$378 million.
Reasoning: The filing of a PEA for a copper-gold project with strong economic indicators (NPV/IRR) and high recoveries is a major project milestone, though it remains at a high-risk scoping stage.
Positive factors
- Strong NPV of US$378M and 21% IRR
- Excellent infrastructure and power access
- High copper recovery of 91%
- Low strip ratio of 2:1
Negative factors
- Includes Inferred Mineral Resources which are speculative
- Study is at the scoping stage (PEA)
- Sensitivity to metal prices
- Potential for metallurgical improvements needed
Facts used in scoring: 2
Classification and evidence
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: The project utilizes a crush-grind-flotation processing plant.
Evidence · text
“Industry standard crush - grind - flotation processing plant”
Bench Scale Onlynegative
Only preliminary bench tests completed — no locked-cycle or pilot work.
Why it applies: The study is a PEA at the scoping stage, implying preliminary metallurgical results.
Evidence · text
“The technical and cost estimates are at the scoping stage”
Single Domain Onlynegative
Testing limited to one composite or domain — representativeness not established.
Why it applies: only one composite was tested
Extracted facts
Stored fact records: 2. Some facts used in scoring do not have a stored record.
Metallurgical Results (2)
flotationPlanalto Copper-Gold Project · copperRecovery: 91 %View all detailsHide details
Identity
- Project
- Planalto Copper-Gold Project
- Commodity
- copper
- Region
- brazil
- Reported Region
- Brazil
- Ticker
- LRA
Test Work
- Program Status
- scoping
- Test Type
- flotation
- Processing Route
- crush - grind - flotation
- Sample
- Planalto Project PEA production estimate
Recovery
- Recovery
- 91 %
- Recovery Basis
- actual_test
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-11-17T00:00:00.000Z
Reasoning: High copper recovery reported for the flotation circuit.
Positive factors
- 91% recovery is strong for flotation
Evidence · text
“recovering 91% copper”
Tags used in scoring
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: processing_route matches the flotation signal
flotationPlanalto Copper-Gold Project · goldRecovery: 51 %View all detailsHide details
Identity
- Project
- Planalto Copper-Gold Project
- Commodity
- gold
- Region
- brazil
- Reported Region
- Brazil
- Ticker
- LRA
Test Work
- Program Status
- scoping
- Test Type
- flotation
- Processing Route
- crush - grind - flotation
- Sample
- Planalto Project PEA production estimate
Recovery
- Recovery
- 51 %
- Recovery Basis
- actual_test
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-11-17T00:00:00.000Z
Reasoning: Gold recovery of 51% is modest for a flotation circuit.
Negative factors
- 51% gold recovery is relatively low
Evidence · text
“recovering 91% copper and 51% gold”
Tags used in scoring
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: processing_route matches the flotation signal
Low Recoverynegative
Recovery below the weak band for the commodity and processing route.
Why it applies: 51% is below the weak band (80%)
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.