Fitzroy Minerals Reports Copper Recoveries of up to 82.6% from Mini-Column Testing, with Preliminary Larger-Scale Results Trending Higher, at the Buen Retiro Copper Project, Chile
Original announcement by orestocks on
- Company
- Fitzroy Minerals Inc.
- Ticker
- FTZ.V
- Exchange
- Unavailable
- Region
- Chile
- Primary commodity
- Copper
- Secondary commodities
- None reported
- Document categories
- Metallurgy
- Extracted
- 2026-09-23 12:08:23 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Fitzroy Minerals announced positive initial metallurgical test results from its Buen Retiro Copper Project in Chile, with mini-column heap leach recoveries reaching up to 82.6% for mixed material after 21 days, alongside low-to-moderate acid consumption. Preliminary 1-metre column tests are trending higher, projecting recoveries up to 95% for mixed material after 70 days. The company also noted favorable rock hardness and abrasiveness, which should positively impact crushing costs, and plans to incorporate these results into a PFS for Q2 2027.
Reasoning: Fitzroy Minerals reported strong initial metallurgical test results for its Buen Retiro Copper Project, with mini-column recoveries up to 82.6% and preliminary 1-metre column results trending even higher. The low acid consumption and favorable rock characteristics are positive indicators for the planned heap leach operation, significantly de-risking the project. While 1-metre column results are still preliminary, the overall outlook is very positive.
Positive factors
- High copper recoveries achieved in mini-column tests, exceeding expectations for heap leaching.
- Preliminary larger-scale 1-metre column tests are trending higher, indicating further recovery improvement.
- Low-to-moderate net acid consumption, which is favorable for operating costs.
- Excellent test reproducibility confirmed by duplicate mini-column tests.
- Favorable rock hardness (soft) and medium-to-moderate abrasiveness, suggesting lower crushing costs.
- Identification of chloride addition as an opportunity to optimize recovery and acid consumption.
- Comprehensive test program designed with multiple stages (mini-columns, 1-metre, 3-metre columns) to de-risk the project.
Negative factors
- 1-metre column results are still preliminary and metallurgical balances are not yet closed.
- Low-grade oxide unit showed higher specific acid consumption, potentially limiting leach time extension benefits for this unit.
Facts used in scoring: 10
Classification and evidence
Heap Leach Routeneutral
Processing via heap leach — lower CAPEX and OPEX, lower recovery expected.
Why it applies: the document describes a heap_leach route ("heap leach")
Multi-Domain Testedpositive
Variability across ore domains (oxide, transition, fresh) has been addressed.
Why it applies: 3 distinct composites were tested
Extracted facts
Stored fact records: 10. Some facts used in scoring do not have a stored record.
Metallurgical Results (10)
mini-columnBuen Retiro Copper Project · copperRecovery: 71.8 %Head Grade: 0.95Head Grade Unit: %View all detailsHide details
Identity
- Project
- Buen Retiro Copper Project
- Commodity
- copper
- Region
- chile
- Reported Region
- Chile
- Ticker
- FTZ.V
Test Work
- Program Status
- preliminary
- Test Type
- mini-column
- Processing Route
- heap leach
- Sample
- High-grade oxide
- Leach Time
- 504 hours
Recovery
- Recovery
- 71.8 %
- Recovery Basis
- actual_test
- Head Grade
- 0.95
- Head Grade Unit
- %
Reagents
- Reagent Notes
- Net specific acid consumption: 4.9 kg H₂SO₄/kg Cu recovered
Lab
- Laboratory
- SGS Laboratories
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-23T00:00:00.000Z
Reasoning: 71.8% copper recovery for high-grade oxide material in mini-column tests is a strong result for heap leaching, supported by low acid consumption and good reproducibility.
Positive factors
- High recovery for oxide material via heap leach.
- Low specific acid consumption.
- Test reproducibility confirmed by duplicates.
Evidence · table
“71.8”
Context: High-grade oxide
Tags used in scoring
Heap Leach Routeneutral
Processing via heap leach — lower CAPEX and OPEX, lower recovery expected.
Why it applies: processing_route matches the heap_leach signal
mini-columnBuen Retiro Copper Project · copperRecovery: 59.9 %Head Grade: 0.35Head Grade Unit: %View all detailsHide details
Identity
- Project
- Buen Retiro Copper Project
- Commodity
- copper
- Region
- chile
- Reported Region
- Chile
- Ticker
- FTZ.V
Test Work
- Program Status
- preliminary
- Test Type
- mini-column
- Processing Route
- heap leach
- Sample
- Low-grade oxide
- Leach Time
- 504 hours
Recovery
- Recovery
- 59.9 %
- Recovery Basis
- actual_test
- Head Grade
- 0.35
- Head Grade Unit
- %
Reagents
- Reagent Notes
- Net specific acid consumption: 11.2 kg H₂SO₄/kg Cu recovered
Lab
- Laboratory
- SGS Laboratories
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-23T00:00:00.000Z
Reasoning: 59.9% copper recovery for low-grade oxide material in mini-column tests is a good result for heap leaching, though specific acid consumption is higher than other units.
Positive factors
- Good recovery for low-grade oxide material via heap leach.
- Test reproducibility confirmed by duplicates.
Negative factors
- Higher specific acid consumption compared to other units, potentially limiting leach time extension benefits.
Evidence · table
“59.9”
Context: Low-grade oxide
Tags used in scoring
Heap Leach Routeneutral
Processing via heap leach — lower CAPEX and OPEX, lower recovery expected.
Why it applies: processing_route matches the heap_leach signal
mini-columnBuen Retiro Copper Project · copperRecovery: 82.6 %Head Grade: 1.24Head Grade Unit: %View all detailsHide details
Identity
- Project
- Buen Retiro Copper Project
- Commodity
- copper
- Region
- chile
- Reported Region
- Chile
- Ticker
- FTZ.V
Test Work
- Program Status
- preliminary
- Test Type
- mini-column
- Processing Route
- heap leach
- Sample
- Mixed
- Leach Time
- 504 hours
Recovery
- Recovery
- 82.6 %
- Recovery Basis
- actual_test
- Head Grade
- 1.24
- Head Grade Unit
- %
Reagents
- Reagent Notes
- Net specific acid consumption: 3.4 kg H₂SO₄/kg Cu recovered
Lab
- Laboratory
- SGS Laboratories
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-23T00:00:00.000Z
Reasoning: 82.6% copper recovery for mixed material in mini-column tests is an exceptional result for heap leaching, achieved with very low acid consumption, indicating strong economic potential.
Positive factors
- Exceptional recovery for mixed material via heap leach.
- Very low specific acid consumption.
- Highest recovery achieved among the tested units.
Evidence · table
“82.6”
Context: Mixed
Tags used in scoring
Heap Leach Routeneutral
Processing via heap leach — lower CAPEX and OPEX, lower recovery expected.
Why it applies: processing_route matches the heap_leach signal
High Recoverypositive
Recovery at or above the exceptional band for the commodity and processing route.
Why it applies: 82.6% is at or above the exceptional band (80%)
mini-columnBuen Retiro Copper Project · copperRecovery: 71.78 %Head Grade: 0.95Head Grade Unit: %View all detailsHide details
Identity
- Project
- Buen Retiro Copper Project
- Commodity
- copper
- Region
- chile
- Reported Region
- Chile
- Ticker
- FTZ.V
Test Work
- Program Status
- preliminary
- Test Type
- mini-column
- Processing Route
- heap leach
- Sample
- High-grade oxide (duplicate)
- Leach Time
- 504 hours
Recovery
- Recovery
- 71.78 %
- Recovery Basis
- actual_test
- Head Grade
- 0.95
- Head Grade Unit
- %
Lab
- Laboratory
- SGS Laboratories
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-23T00:00:00.000Z
Reasoning: 71.78% copper recovery for high-grade oxide material in a duplicate mini-column test confirms the reproducibility of the strong initial results.
Positive factors
- High recovery for oxide material via heap leach.
- Confirms reproducibility of test results.
Evidence · table
“71.78”
Context: High-grade oxide
Tags used in scoring
Heap Leach Routeneutral
Processing via heap leach — lower CAPEX and OPEX, lower recovery expected.
Why it applies: processing_route matches the heap_leach signal
mini-columnBuen Retiro Copper Project · copperRecovery: 71.91 %Head Grade: 0.95Head Grade Unit: %View all detailsHide details
Identity
- Project
- Buen Retiro Copper Project
- Commodity
- copper
- Region
- chile
- Reported Region
- Chile
- Ticker
- FTZ.V
Test Work
- Program Status
- preliminary
- Test Type
- mini-column
- Processing Route
- heap leach
- Sample
- High-grade oxide (duplicate)
- Leach Time
- 504 hours
Recovery
- Recovery
- 71.91 %
- Recovery Basis
- actual_test
- Head Grade
- 0.95
- Head Grade Unit
- %
Lab
- Laboratory
- SGS Laboratories
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-23T00:00:00.000Z
Reasoning: 71.91% copper recovery for high-grade oxide material in a duplicate mini-column test further confirms the reproducibility of the strong initial results.
Positive factors
- High recovery for oxide material via heap leach.
- Confirms reproducibility of test results.
Evidence · table
“71.91”
Context: 71.78
Tags used in scoring
Heap Leach Routeneutral
Processing via heap leach — lower CAPEX and OPEX, lower recovery expected.
Why it applies: processing_route matches the heap_leach signal
mini-columnBuen Retiro Copper Project · copperRecovery: 60.34 %Head Grade: 0.35Head Grade Unit: %View all detailsHide details
Identity
- Project
- Buen Retiro Copper Project
- Commodity
- copper
- Region
- chile
- Reported Region
- Chile
- Ticker
- FTZ.V
Test Work
- Program Status
- preliminary
- Test Type
- mini-column
- Processing Route
- heap leach
- Sample
- Low-grade oxide (duplicate)
- Leach Time
- 504 hours
Recovery
- Recovery
- 60.34 %
- Recovery Basis
- actual_test
- Head Grade
- 0.35
- Head Grade Unit
- %
Lab
- Laboratory
- SGS Laboratories
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-23T00:00:00.000Z
Reasoning: 60.34% copper recovery for low-grade oxide material in a duplicate mini-column test confirms the reproducibility of the good initial results.
Positive factors
- Good recovery for low-grade oxide material via heap leach.
- Confirms reproducibility of test results.
Evidence · table
“60.34”
Context: Low-grade oxide
Tags used in scoring
Heap Leach Routeneutral
Processing via heap leach — lower CAPEX and OPEX, lower recovery expected.
Why it applies: processing_route matches the heap_leach signal
mini-columnBuen Retiro Copper Project · copperRecovery: 59.4 %Head Grade: 0.35Head Grade Unit: %View all detailsHide details
Identity
- Project
- Buen Retiro Copper Project
- Commodity
- copper
- Region
- chile
- Reported Region
- Chile
- Ticker
- FTZ.V
Test Work
- Program Status
- preliminary
- Test Type
- mini-column
- Processing Route
- heap leach
- Sample
- Low-grade oxide (duplicate)
- Leach Time
- 504 hours
Recovery
- Recovery
- 59.4 %
- Recovery Basis
- actual_test
- Head Grade
- 0.35
- Head Grade Unit
- %
Lab
- Laboratory
- SGS Laboratories
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-23T00:00:00.000Z
Reasoning: 59.40% copper recovery for low-grade oxide material in a duplicate mini-column test further confirms the reproducibility of the good initial results.
Positive factors
- Good recovery for low-grade oxide material via heap leach.
- Confirms reproducibility of test results.
Evidence · table
“59.40”
Context: 60.34
Tags used in scoring
Heap Leach Routeneutral
Processing via heap leach — lower CAPEX and OPEX, lower recovery expected.
Why it applies: processing_route matches the heap_leach signal
1-metre columnBuen Retiro Copper Project · copperRecovery: 85 %View all detailsHide details
Identity
- Project
- Buen Retiro Copper Project
- Commodity
- copper
- Region
- chile
- Reported Region
- Chile
- Ticker
- FTZ.V
Test Work
- Program Status
- preliminary
- Test Type
- 1-metre column
- Processing Route
- heap leach
- Sample
- High-grade oxide
- Leach Time
- 1680 hours
Recovery
- Recovery
- 85 %
- Recovery Basis
- actual_test
Lab
- Laboratory
- SGS Laboratories
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-23T00:00:00.000Z
Reasoning: Preliminary 1-metre column tests project 85% copper recovery for high-grade oxide, which is a very strong result and an improvement over mini-column tests, though still awaiting final confirmation.
Positive factors
- Very high projected recovery for high-grade oxide material.
- Larger-scale test trending higher than mini-columns.
Negative factors
- Results are preliminary and metallurgical balance is not yet closed.
Evidence · text
“preliminary copper recoveries of 85% for the high-grade oxide (C1401)”
Tags used in scoring
Heap Leach Routeneutral
Processing via heap leach — lower CAPEX and OPEX, lower recovery expected.
Why it applies: processing_route matches the heap_leach signal
High Recoverypositive
Recovery at or above the exceptional band for the commodity and processing route.
Why it applies: 85% is at or above the exceptional band (80%)
1-metre columnBuen Retiro Copper Project · copperRecovery: 74 %View all detailsHide details
Identity
- Project
- Buen Retiro Copper Project
- Commodity
- copper
- Region
- chile
- Reported Region
- Chile
- Ticker
- FTZ.V
Test Work
- Program Status
- preliminary
- Test Type
- 1-metre column
- Processing Route
- heap leach
- Sample
- Low-grade oxide
- Leach Time
- 1680 hours
Recovery
- Recovery
- 74 %
- Recovery Basis
- actual_test
Lab
- Laboratory
- SGS Laboratories
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-23T00:00:00.000Z
Reasoning: Preliminary 1-metre column tests project 74% copper recovery for low-grade oxide, which is a strong result and an improvement over mini-column tests, though still awaiting final confirmation.
Positive factors
- Strong projected recovery for low-grade oxide material.
- Larger-scale test trending higher than mini-columns.
Negative factors
- Results are preliminary and metallurgical balance is not yet closed.
Evidence · text
“74% for the low-grade oxide (C1403)”
Tags used in scoring
Heap Leach Routeneutral
Processing via heap leach — lower CAPEX and OPEX, lower recovery expected.
Why it applies: processing_route matches the heap_leach signal
1-metre columnBuen Retiro Copper Project · copperRecovery: 95 %View all detailsHide details
Identity
- Project
- Buen Retiro Copper Project
- Commodity
- copper
- Region
- chile
- Reported Region
- Chile
- Ticker
- FTZ.V
Test Work
- Program Status
- preliminary
- Test Type
- 1-metre column
- Processing Route
- heap leach
- Sample
- Mixed
- Leach Time
- 1680 hours
Recovery
- Recovery
- 95 %
- Recovery Basis
- actual_test
Lab
- Laboratory
- SGS Laboratories
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-23T00:00:00.000Z
Reasoning: Preliminary 1-metre column tests project 95% copper recovery for mixed material, which is an exceptional result and a significant improvement over mini-column tests, indicating very strong economic potential, though still awaiting final confirmation.
Positive factors
- Exceptional projected recovery for mixed material.
- Significantly higher recovery than mini-column tests, indicating strong potential.
Negative factors
- Results are preliminary and metallurgical balance is not yet closed.
Evidence · text
“approximately 95% for the mixed unit (C1405)”
Tags used in scoring
Heap Leach Routeneutral
Processing via heap leach — lower CAPEX and OPEX, lower recovery expected.
Why it applies: processing_route matches the heap_leach signal
High Recoverypositive
Recovery at or above the exceptional band for the commodity and processing route.
Why it applies: 95% is at or above the exceptional 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.