Rockhaven Announces Improved Metallurgical Test Work Results on its Klaza Project, Yukon
Original announcement by tmx on
- Company
- Rockhaven Resources Ltd.
- Ticker
- RK
- Exchange
- TSX
- Region
- Yukon
- Primary commodity
- Gold
- Secondary commodities
- Silver, Lead, Zinc, Arsenic
- Document categories
- Metallurgy
- Extracted
- 2026-08-26 07:02:04 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Rockhaven has announced improved metallurgical test work results for the Klaza Project, demonstrating that a conventional flotation flowsheet can produce three marketable concentrates (lead, zinc, and arsenopyrite). This optimized approach eliminates the need for costly on-site pressure oxidation and includes successful dense media separation (DMS) pre-concentration results that could reduce operating costs and tailings management requirements.
Reasoning: The results demonstrate a significant de-risking of the project by replacing expensive on-site hydrometallurgy with a simpler, conventional flotation flowsheet and adding a high-efficiency pre-concentration step.
Positive factors
- Elimination of on-site pressure oxidation (POX) reduces CAPEX/OPEX
- High recoveries achieved via conventional flotation
- DMS pre-concentration offers significant cost and tailings benefits
- Three marketable concentrates identified
Negative factors
- Arsenic-rich concentrate attracts penalties/fees
Facts used in scoring: 7
Classification and evidence
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: The results describe flotation and DMS processing routes.
Evidence · text
“conventional flotation”
Refractory Orenegative
Ore requires oxidation/pressure treatment before recovery — a processing and recovery risk.
Why it applies: The release explicitly mentions refractory gold and the need for arsenopyrite concentrate to manage it.
Evidence · text
“Refractory Gold Flotation”
High Recoverypositive
Recovery at or above the exceptional band for the commodity and processing route.
Why it applies: DMS recoveries for gold are exceptionally high (up to 99%).
Evidence · table
“99.0”
Context: 32
Extracted facts
Stored fact records: 7. Some facts used in scoring do not have a stored record.
Metallurgical Results (7)
Fact 1goldRecovery: 32 %View all detailsHide details
Identity
- Commodity
- gold
- Ticker
- RK
Test Work
- Sample
- MC-1 Lead concentrate
Recovery
- Recovery
- 32 %
- Recovery Basis
- actual_test
- Conc. Grade
- 210
- Conc. Grade Unit
- g/t
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2024-05-06T00:00:00.000Z
Reasoning: High-grade gold in lead concentrate.
Evidence · table
“210”
Context: 0.9
Fact 2silverRecovery: 57 %View all detailsHide details
Identity
- Commodity
- silver
- Ticker
- RK
Test Work
- Sample
- MC-1 Lead concentrate
Recovery
- Recovery
- 57 %
- Recovery Basis
- actual_test
- Conc. Grade
- 4997
- Conc. Grade Unit
- g/t
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2024-05-06T00:00:00.000Z
Reasoning: High silver credits in lead concentrate.
Evidence · table
“4,997”
Context: 0.9
Fact 3leadRecovery: 83 %View all detailsHide details
Identity
- Commodity
- lead
- Ticker
- RK
Test Work
- Sample
- MC-1 Lead concentrate
Recovery
- Recovery
- 83 %
- Recovery Basis
- actual_test
- Conc. Grade
- 61.6
- Conc. Grade Unit
- %
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2024-05-06T00:00:00.000Z
Reasoning: Strong lead grade in concentrate.
Evidence · table
“61.6”
Context: 0.9
Fact 4goldRecovery: 44 %View all detailsHide details
Identity
- Commodity
- gold
- Ticker
- RK
Test Work
- Sample
- MC-1 Arsenopyrite concentrate
Recovery
- Recovery
- 44 %
- Recovery Basis
- actual_test
- Conc. Grade
- 112
- Conc. Grade Unit
- g/t
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2024-05-06T00:00:00.000Z
Reasoning: High grade gold in arsenopyrite concentrate, though arsenic content is a penalty factor.
Positive factors
- High grade concentrate
Negative factors
- Arsenic penalties
Evidence · table
“112”
Context: 2.2
Fact 5goldRecovery: 99 %Head Grade: 7.9Head Grade Unit: g/tView all detailsHide details
Identity
- Commodity
- gold
- Ticker
- RK
Test Work
- Sample
- Western BRX DMS
Recovery
- Recovery
- 99 %
- Recovery Basis
- actual_test
- Head Grade
- 7.9
- Head Grade Unit
- g/t
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2024-05-06T00:00:00.000Z
Reasoning: Very high gold recovery via DMS.
Positive factors
- Exceptional recovery
Evidence · table
“99.0”
Context: 32
Fact 6goldRecovery: 97.7 %Head Grade: 5Head Grade Unit: g/tView all detailsHide details
Identity
- Commodity
- gold
- Ticker
- RK
Test Work
- Sample
- Central Klaza DMS
Recovery
- Recovery
- 97.7 %
- Recovery Basis
- actual_test
- Head Grade
- 5
- Head Grade Unit
- g/t
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2024-05-06T00:00:00.000Z
Reasoning: Strong gold recovery via DMS.
Positive factors
- Strong recovery
Evidence · table
“97.7”
Context: 38
Fact 7goldRecovery: 78.9 %Head Grade: 1.7Head Grade Unit: g/tView all detailsHide details
Identity
- Commodity
- gold
- Ticker
- RK
Test Work
- Sample
- Western Klaza DMS
Recovery
- Recovery
- 78.9 %
- Recovery Basis
- actual_test
- Head Grade
- 1.7
- Head Grade Unit
- g/t
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2024-05-06T00:00:00.000Z
Reasoning: Moderate gold recovery in Western Klaza zone.
Negative factors
- Lower recovery compared to other zones
Evidence · table
“78.9”
Context: 11
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.