Winshear Portsoy Project – Successful Metallurgical Testwork Produces Marketable Copper and Highly Attractive Nickel Concentrates
Original announcement by globenewswire on
- Company
- Winshear Metals Corp.
- Ticker
- WINS
- Exchange
- Unavailable
- Region
- NE Scotland
- Primary commodity
- Nickel
- Secondary commodities
- Copper, Cobalt
- Document categories
- Metallurgy
- Extracted
- 2026-08-20 19:48:03 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Winshear Metals Corp. reported successful batch metallurgical testwork at the Portsoy Project in Scotland, producing marketable copper and high-grade nickel concentrates. The results demonstrate the amenability of the Rodburn Target mineralization to conventional sequential flotation.
Reasoning: First-ever metallurgical testwork on the project shows promising recovery and concentrate quality using conventional flotation.
Positive factors
- successful production of marketable concentrates
- high nickel concentrate grade
- low nickel penalty risk in copper concentrate
- QP sign-off provided
Negative factors
- batch scale testing only
- recoveries are expected ranges rather than absolute values
Facts used in scoring: 7
Classification and evidence
Bench Scale Onlynegative
Only preliminary bench tests completed — no locked-cycle or pilot work.
Why it applies: Testwork was conducted using batch tests rather than locked-cycle or pilot scale.
Evidence · text
“Based on the batch tests”
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: The objective was to determine amenability to conventional sequential flotation methods.
Evidence · text
“respond to conventional sequential flotation methods”
QP/CP Signedpositive · Story-specific tag
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: J. Patricio Varas, P.Geo. and Tony Tran, P.Eng. have read and approved the technical disclosure.
Evidence · text
“Qualified Person J. Patricio Varas, P.Geo... has read and approved all technical and scientific information”
Extracted facts
Stored fact records: 7. Some facts used in scoring do not have a stored record.
Metallurgical Results (7)
batch flotationcopperRecovery: 77.5 %Head Grade: 0.82Head Grade Unit: %View all detailsHide details
Identity
- Commodity
- copper
- Ticker
- WINS
Test Work
- Program Status
- preliminary
- Test Type
- batch flotation
- Sample
- composite sample of massive to disseminated sulphide mineralisation from drill holes completed in 2023 / 2024
Recovery
- Recovery
- 77.5 %
- Recovery Basis
- actual_test
- Head Grade
- 0.82
- Head Grade Unit
- %
Lab
- Laboratory
- Blue Coast Research Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-27T00:00:00.000Z
Reasoning: Head grade of 0.82% Cu with expected recoveries of 75-80%.
Positive factors
- marketable concentrate grade
Negative factors
- batch scale only
Evidence · text
“Head assays were 0.82% copper... copper recoveries of 75-80% and nickel of 60-65% can be expected.”
batch flotationnickelRecovery: 62.5 %Head Grade: 1.64Head Grade Unit: %View all detailsHide details
Identity
- Commodity
- nickel
- Ticker
- WINS
Test Work
- Program Status
- preliminary
- Test Type
- batch flotation
- Sample
- composite sample of massive to disseminated sulphide mineralisation from drill holes completed in 2023 / 2024
Recovery
- Recovery
- 62.5 %
- Recovery Basis
- actual_test
- Head Grade
- 1.64
- Head Grade Unit
- %
Lab
- Laboratory
- Blue Coast Research Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-27T00:00:00.000Z
Reasoning: Head grade of 1.64% Ni with expected recoveries of 60-65% and high concentrate grades.
Positive factors
- high concentrate grade
- attractive to smelters
Negative factors
- batch scale only
Evidence · text
“Head assays were... 1.64% nickel... nickel of 60-65% can be expected.”
Fact 3cobaltHead Grade: 0.11Head Grade Unit: %View all detailsHide details
Identity
- Commodity
- cobalt
- Ticker
- WINS
Test Work
- Sample
- composite sample of massive to disseminated sulphide mineralisation from drill holes completed in 2023 / 2024
Recovery
- Head Grade
- 0.11
- Head Grade Unit
- %
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-27T00:00:00.000Z
Reasoning: Head grade of 0.11% Co reported as part of the composite.
Evidence · text
“Head assays were... 0.11% cobalt.”
Fact 4nickelView all detailsHide details
Identity
- Commodity
- nickel
- Ticker
- WINS
Test Work
- Sample
- Nickel concentrate
Recovery
- Conc. Grade
- 15
- Conc. Grade Unit
- %
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-27T00:00:00.000Z
Reasoning: Produced nickel concentrate grades of 14-16%.
Positive factors
- highly attractive concentrate grade
Evidence · text
“Nickel concentrate grades of 14-16% were produced”
Fact 5cobaltView all detailsHide details
Identity
- Commodity
- cobalt
- Ticker
- WINS
Test Work
- Sample
- Nickel concentrate
Recovery
- Conc. Grade
- 1
- Conc. Grade Unit
- %
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-27T00:00:00.000Z
Reasoning: Nickel concentrate included in excess of 1% cobalt.
Evidence · text
“included in excess of 1% cobalt.”
Fact 6copperView all detailsHide details
Identity
- Commodity
- copper
- Ticker
- WINS
Test Work
- Sample
- Nickel concentrate
Recovery
- Conc. Grade
- 0.54
- Conc. Grade Unit
- %
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-27T00:00:00.000Z
Reasoning: Nickel concentrate contained 0.54% copper which would be payable.
Positive factors
- payable content
Evidence · text
“The nickel concentrate contained 0.54% copper which would be payable.”
Fact 7copperView all detailsHide details
Identity
- Commodity
- copper
- Ticker
- WINS
Test Work
- Sample
- Copper concentrate
Recovery
- Conc. Grade
- 25
- Conc. Grade Unit
- %
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-27T00:00:00.000Z
Reasoning: Copper concentrate grades of ~25% with <1% nickel content.
Positive factors
- low penalty risk
Evidence · text
“Copper concentrate grades of ~25% with <1% nickel content”
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.