VKA: VIKINGS GRAVITY SEPARATION PRODUCES 69.3% WO3 CONCENTRATE
Original announcement by asx on
- Company
- Viking Mines Limited
- Ticker
- VKA
- Exchange
- ASX
- Region
- Nevada, USA
- Primary commodity
- Tungsten
- Secondary commodities
- None reported
- Document categories
- Metallurgy
- Extracted
- 2026-10-01 00:12:42 UTC
Analysis by Minestarters Atlas
Atlas analysis published:
Minestarters Atlas analysis
Summary
Viking Mines has completed gravity separation testwork on three additional metallurgical samples from the Linka Tungsten Project, demonstrating repeatable results. Notably, the Conquest sample produced a 69.3% WO3 concentrate from a low-grade 0.76% WO3 feed. Flotation optimisation on gravity tails is ongoing, with initial combined recovery of 73.1% achieved on the Linka Stockpile sample.
Reasoning: The testwork demonstrates consistent and repeatable gravity separation producing high-grade concentrates (>50% WO3) across different samples, with promising initial flotation results on the stockpile sample.
Positive factors
- Repeatable gravity separation response across multiple samples
- High-grade concentrate (69.3% WO3) achieved from low-grade feed (0.76% WO3)
- Combined gravity plus flotation recovery increasing to 73.1% on stockpile sample
- High-value product potential with tungsten prices at US$244,000/t WO3
Negative factors
- Samples are loose surface material and representativeness of in-situ mineralisation is not established
- Combined concentrate grade for stockpile flotation is currently below 50% WO3 target
Facts used in scoring: 5
Classification and evidence
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: The testwork involves gravity separation followed by flotation (mill route).
Evidence · text
“Flotation testwork on the gravity tails is ongoing”
Bench Scale Onlynegative
Only preliminary bench tests completed — no locked-cycle or pilot work.
Why it applies: The results are from metallurgical samples (loose rocks) processed in a laboratory setting, not a pilot plant.
Evidence · text
“Gravity separation testwork has now been completed on three additional metallurgical samples”
Gravity Routeneutral
Gravity separation forms a material part of the flowsheet.
Why it applies: the document describes a gravity route ("gravity")
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: 5. Some facts used in scoring do not have a stored record.
Metallurgical Results (5)
gravityLinka Tungsten Project · tungstenRecovery: 43.8 %Head Grade: 0.76Head Grade Unit: % WO3View all detailsHide details
Identity
- Project
- Linka Tungsten Project
- Commodity
- tungsten
- Region
- usa_nv
- Reported Region
- Nevada, USA
- Ticker
- VKA
Test Work
- Program Status
- detailed
- Test Type
- gravity
- Sample
- Conquest (LKMET0003) gravity concentrate
Recovery
- Recovery
- 43.8 %
- Recovery Basis
- actual_test
- Head Grade
- 0.76
- Head Grade Unit
- % WO3
- Conc. Grade
- 69.3
- Conc. Grade Unit
- % WO3
Lab
- Laboratory
- Base Met Labs (BML)
- Consultant
- Independent Metallurgical Operations (IMO)
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-30T00:00:00.000Z
Reasoning: 69.3% WO3 concentrate from 0.76% WO3 head grade is a strong result for gravity separation.
Positive factors
- High grade concentrate from low grade feed
Evidence · text
“Conquest sample (LKMET0003) delivered both higher grade and recovery into a gravity concentrate... at 69.3% WO3 and 43.8% recovery, from the lowest-grade sample tested (head grade of 0.76% WO3)”
Tags used in scoring
Gravity Routeneutral
Gravity separation forms a material part of the flowsheet.
Why it applies: processing_route matches the gravity signal
gravityLinka Tungsten Project · tungstenRecovery: 46.8 %Head Grade: 0.99Head Grade Unit: % WO3View all detailsHide details
Identity
- Project
- Linka Tungsten Project
- Commodity
- tungsten
- Region
- usa_nv
- Reported Region
- Nevada, USA
- Ticker
- VKA
Test Work
- Program Status
- detailed
- Test Type
- gravity
- Sample
- Linka Stockpile (LKMET0001) gravity concentrate
Recovery
- Recovery
- 46.8 %
- Recovery Basis
- actual_test
- Head Grade
- 0.99
- Head Grade Unit
- % WO3
- Conc. Grade
- 55.8
- Conc. Grade Unit
- % WO3
Lab
- Laboratory
- Base Met Labs (BML)
- Consultant
- Independent Metallurgical Operations (IMO)
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-30T00:00:00.000Z
Reasoning: Achieved the highest gravity recovery (46.8%) among the tested samples.
Positive factors
- Highest gravity recovery of the four samples
Evidence · text
“Linka Stockpile (LKMET0001): 55.8% WO3 concentrate at 46.8% recovery from a 0.99% WO3 head grade, the highest gravity recovery of the four samples.”
Tags used in scoring
Gravity Routeneutral
Gravity separation forms a material part of the flowsheet.
Why it applies: processing_route matches the gravity signal
gravityLinka Tungsten Project · tungstenRecovery: 42.5 %Head Grade: 0.91Head Grade Unit: % WO3View all detailsHide details
Identity
- Project
- Linka Tungsten Project
- Commodity
- tungsten
- Region
- usa_nv
- Reported Region
- Nevada, USA
- Ticker
- VKA
Test Work
- Program Status
- detailed
- Test Type
- gravity
- Sample
- Hillside (LKMET0002) gravity concentrate
Recovery
- Recovery
- 42.5 %
- Recovery Basis
- actual_test
- Head Grade
- 0.91
- Head Grade Unit
- % WO3
- Conc. Grade
- 53.9
- Conc. Grade Unit
- % WO3
Lab
- Laboratory
- Base Met Labs (BML)
- Consultant
- Independent Metallurgical Operations (IMO)
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-30T00:00:00.000Z
Reasoning: Standard gravity separation result meeting the >50% WO3 target.
Positive factors
- Concentrate grade above 50% target
Evidence · text
“Hillside (LKMET0002): 53.9% WO3 concentrate at 42.5% recovery from a 0.91% WO3 head grade.”
Tags used in scoring
Gravity Routeneutral
Gravity separation forms a material part of the flowsheet.
Why it applies: processing_route matches the gravity signal
gravity + flotationLinka Tungsten Project · tungstenRecovery: 73.1 %Head Grade: 0.99Head Grade Unit: % WO3View all detailsHide details
Identity
- Project
- Linka Tungsten Project
- Commodity
- tungsten
- Region
- usa_nv
- Reported Region
- Nevada, USA
- Ticker
- VKA
Test Work
- Program Status
- detailed
- Test Type
- gravity + flotation
- Processing Route
- flotation
- Sample
- Linka Stockpile (LKMET0001) combined gravity plus flotation
Recovery
- Recovery
- 73.1 %
- Recovery Basis
- actual_test
- Head Grade
- 0.99
- Head Grade Unit
- % WO3
- Conc. Grade
- 44.7
- Conc. Grade Unit
- % WO3
Lab
- Laboratory
- Base Met Labs (BML)
- Consultant
- Independent Metallurgical Operations (IMO)
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-30T00:00:00.000Z
Reasoning: Strong recovery improvement, though concentrate grade needs further optimisation to meet targets.
Positive factors
- Significant increase in combined recovery to 73.1%
Negative factors
- Combined concentrate grade (44.7%) is below the 50% WO3 target
Evidence · text
“returning a combined concentrate of 44.7% WO3 at 73.1% recovery (Table 1). This first pass has lifted recovery from 46.8% for the gravity stage alone to 73.1%, whilst the combined concentrate grade is currently below the 50% WO3 target.”
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
Gravity Routeneutral
Gravity separation forms a material part of the flowsheet.
Why it applies: processing_route matches the gravity signal
gravityLinka Tungsten Project · tungstenRecovery: 42.7 %Head Grade: 1.28Head Grade Unit: % WO3Historical resultNeeds review: historical_restatementView all detailsHide details
Identity
- Project
- Linka Tungsten Project
- Commodity
- tungsten
- Region
- usa_nv
- Reported Region
- Nevada, USA
- Ticker
- VKA
Test Work
- Program Status
- detailed
- Test Type
- gravity
- Sample
- Linka Pit (LKMET0004) gravity concentrate (historical)
Recovery
- Recovery
- 42.7 %
- Recovery Basis
- actual_test
- Head Grade
- 1.28
- Head Grade Unit
- % WO3
- Conc. Grade
- 66.6
- Conc. Grade Unit
- % WO3
Lab
- Laboratory
- Base Met Labs (BML)
- Consultant
- Independent Metallurgical Operations (IMO)
Review
- Needs Review
- Yes
- Review Reason
- historical_restatement
- Historical
- Yes
- Historical Source Date
- 2026-05-28T00:00:00.000Z
Dates
- Event date
- 2026-09-30T00:00:00.000Z
Reasoning: Historical baseline result used for comparison.
Evidence · text
“66.6% WO3 at 42.7% recovery”
Tags used in scoring
Gravity Routeneutral
Gravity separation forms a material part of the flowsheet.
Why it applies: processing_route matches the gravity signal
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.