# VKA: VIKINGS GRAVITY SEPARATION PRODUCES 69.3% WO3 CONCENTRATE

Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/vka-vikings-gravity-separation-produces-69-3-wo3-concentrate--f43def48-7929-467c-95b5-b957fe600ae8

Original source: https://www.asx.com.au/asx/v2/statistics/displayAnnouncement.do?display=pdf&idsId=03147121

Publisher: asx

Original announcement: 2026-09-30T23:47:00.000Z

Analysis by Minestarters Atlas

Atlas analysis published: 2026-10-01T00:12:42.227Z

Atlas analysis updated: 2026-10-01T00:12:42.227Z

- 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

Narrative sentiment: 0.80 · Bullish

## Minestarters Atlas 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 factor: Repeatable gravity separation response across multiple samples

- Positive factor: High-grade concentrate \(69.3% WO3\) achieved from low-grade feed \(0.76% WO3\)

- Positive factor: Combined gravity plus flotation recovery increasing to 73.1% on stockpile sample

- Positive factor: High-value product potential with tungsten prices at US$244,000/t WO3

- Negative factor: Samples are loose surface material and representativeness of in-situ mineralisation is not established

- Negative factor: Combined concentrate grade for stockpile flotation is currently below 50% WO3 target

Facts used in scoring: 5

## Classification and evidence

**Mill Route**

Polarity: neutral

Definition: 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 Only**

Polarity: negative

Definition: 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 Route**

Polarity: neutral

Definition: Gravity separation forms a material part of the flowsheet.

Why it applies: the document describes a gravity route \("gravity"\)

**Multi-Domain Tested**

Polarity: positive

Definition: 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)

### gravity

[Link to this fact](https://atlas-staging.minestarters.com/news/vka-vikings-gravity-separation-produces-69-3-wo3-concentrate--f43def48-7929-467c-95b5-b957fe600ae8#fact-metallurgical-facts-0)

Linka Tungsten Project · tungsten

#### 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 factor: 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 Route**

Polarity: neutral

Definition: Gravity separation forms a material part of the flowsheet.

Why it applies: processing\_route matches the gravity signal

### gravity

[Link to this fact](https://atlas-staging.minestarters.com/news/vka-vikings-gravity-separation-produces-69-3-wo3-concentrate--f43def48-7929-467c-95b5-b957fe600ae8#fact-metallurgical-facts-1)

Linka Tungsten Project · tungsten

#### 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 factor: 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 Route**

Polarity: neutral

Definition: Gravity separation forms a material part of the flowsheet.

Why it applies: processing\_route matches the gravity signal

### gravity

[Link to this fact](https://atlas-staging.minestarters.com/news/vka-vikings-gravity-separation-produces-69-3-wo3-concentrate--f43def48-7929-467c-95b5-b957fe600ae8#fact-metallurgical-facts-2)

Linka Tungsten Project · tungsten

#### 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 factor: 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 Route**

Polarity: neutral

Definition: Gravity separation forms a material part of the flowsheet.

Why it applies: processing\_route matches the gravity signal

### gravity + flotation

[Link to this fact](https://atlas-staging.minestarters.com/news/vka-vikings-gravity-separation-produces-69-3-wo3-concentrate--f43def48-7929-467c-95b5-b957fe600ae8#fact-metallurgical-facts-3)

Linka Tungsten Project · tungsten

#### 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 factor: Significant increase in combined recovery to 73.1%

- Negative factor: 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 Route**

Polarity: neutral

Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\).

Why it applies: processing\_route matches the flotation signal

**Gravity Route**

Polarity: neutral

Definition: Gravity separation forms a material part of the flowsheet.

Why it applies: processing\_route matches the gravity signal

### gravity

[Link to this fact](https://atlas-staging.minestarters.com/news/vka-vikings-gravity-separation-produces-69-3-wo3-concentrate--f43def48-7929-467c-95b5-b957fe600ae8#fact-metallurgical-facts-4)

Linka Tungsten Project · tungsten

Historical result

Needs review: historical\_restatement

#### 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 Route**

Polarity: neutral

Definition: 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.