# Positive Metallurgical Results from Initial Testwork with Dundee Sustainable Technologies

Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/positive-metallurgical-results-from-initial-testwork-with-dundee-sustainable-tec--67d6318b-29c9-41e7-99ca-cbf73f7c6fe1

Original source: https://money.tmx.com/en/quote/FVL/news/5212298572725016/positive-metallurgical-results-from-initial-testwork-with-dundee-sustainable-tec

Publisher: tmx

Original announcement: 2025-12-16T11:00:00.000Z

Analysis by Minestarters Atlas

Atlas analysis published: Unknown date

Atlas analysis updated: Unknown date

- Company: Freegold Ventures Limited

- Ticker: FVL

- Exchange: TSX

- Region: Alaska

- Primary commodity: Gold

- Secondary commodities: Arsenic, Sulfur

- Document categories: Metallurgy, Resource update

- Extracted: 2026-08-21 03:51:19 UTC

Narrative sentiment: 0.80 · Bullish

## Minestarters Atlas summary

Freegold Ventures reported successful laboratory-scale metallurgical testwork using the GlassLock Process on Golden Summit sulphide concentrate. The process reduced arsenic from 7.34% to 0.17% and upgraded gold concentrate grade to 24.7 g/t Au without measurable gold loss.

Reasoning: The GlassLock process successfully addressed a major penalty element \(arsenic\) while upgrading gold concentrate grade, significantly de-risking the project's metallurgical profile for the upcoming PFS.

- Positive factor: Significant arsenic reduction \(98%\)

- Positive factor: Gold concentrate grade upgrade to 24.7 g/t

- Positive factor: No measurable gold loss during GlassLock process

- Positive factor: Produces stable, non-toxic arsenic byproduct

- Negative factor: Testing is currently at laboratory scale

Facts used in scoring: 5

## Classification and evidence

**High Recovery**

Polarity: positive

Definition: Recovery at or above the exceptional band for the commodity and processing route.

Why it applies: Three oxidation processes tested prior to GlassLock showed recoveries exceeding 90%.

Evidence · text

> The three oxidation processes tested prior to the GlassLock Process™, have all shown recoveries exceeding 90%.

**QP/CP Signed**

Polarity: positive

Definition: 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: Alvin Jackson, P.Geo., has approved the scientific and technical disclosure.

Evidence · text

> The Qualified Person for this release is Alvin Jackson , P.Geo.

**Inferred Resource**

Polarity: negative

Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.

Why it applies: The resource includes a significant 11.9 million ounce inferred component.

Evidence · text

> 11.9 million ounces at 1.04 g/t Au \(inferred\)

## Extracted facts

Stored fact records: 5. Some facts used in scoring do not have a stored record.

## Metallurgical Results (5)

### locked-cycle flotation

[Link to this fact](https://atlas-staging.minestarters.com/news/positive-metallurgical-results-from-initial-testwork-with-dundee-sustainable-tec--67d6318b-29c9-41e7-99ca-cbf73f7c6fe1#fact-metallurgical-facts-0)

gold

#### Identity

- Commodity: gold
- Ticker: FVL

#### Test Work

- Program Status: preliminary
- Test Type: locked-cycle flotation
- Processing Route: GlassLock Process™
- Sample: gold-bearing sulphide concentrate from locked-cycle flotation testwork

#### Recovery

- Recovery: 100 %
- Recovery Basis: actual\_test
- Conc. Grade: 24.7
- Conc. Grade Unit: g/t Au

#### Lab

- Laboratory: Dundee Sustainable Technologies

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2025-12-16T00:00:00.000Z

Reasoning: High-grade concentrate achieved with zero reported gold loss during the arsenic removal process.

- Positive factor: Concentrate grade upgrade of 47%

- Positive factor: No measurable gold loss

Evidence · text

> The gold grade of the concentrate increased by 47%, reaching 24.7g/t Au, with no measurable gold loss during the GlassLock Process™

### locked-cycle flotation

[Link to this fact](https://atlas-staging.minestarters.com/news/positive-metallurgical-results-from-initial-testwork-with-dundee-sustainable-tec--67d6318b-29c9-41e7-99ca-cbf73f7c6fe1#fact-metallurgical-facts-1)

arsenic

#### Identity

- Commodity: arsenic
- Ticker: FVL

#### Test Work

- Program Status: preliminary
- Test Type: locked-cycle flotation
- Processing Route: GlassLock Process™
- Sample: gold-bearing sulphide concentrate from locked-cycle flotation testwork

#### Recovery

- Head Grade: 7.34
- Head Grade Unit: %
- Conc. Grade: 0.17
- Conc. Grade Unit: %

#### Lab

- Laboratory: Dundee Sustainable Technologies

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2025-12-16T00:00:00.000Z

Reasoning: Massive reduction in penalty element arsenic, bringing it well below typical smelter thresholds.

- Positive factor: 98% reduction in arsenic content

Evidence · text

> Arsenic content was significantly lowered from 7.34% to 0.17%, representing a reduction of over 98%.

### locked-cycle flotation

[Link to this fact](https://atlas-staging.minestarters.com/news/positive-metallurgical-results-from-initial-testwork-with-dundee-sustainable-tec--67d6318b-29c9-41e7-99ca-cbf73f7c6fe1#fact-metallurgical-facts-2)

sulfur

#### Identity

- Commodity: sulfur
- Ticker: FVL

#### Test Work

- Program Status: preliminary
- Test Type: locked-cycle flotation
- Processing Route: GlassLock Process™
- Sample: gold-bearing sulphide concentrate from locked-cycle flotation testwork

#### Recovery

- Head Grade: 28.8
- Head Grade Unit: %
- Conc. Grade: 20.8
- Conc. Grade Unit: %

#### Lab

- Laboratory: Dundee Sustainable Technologies

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2025-12-16T00:00:00.000Z

Reasoning: Reduction in sulphur levels contributes to concentrate quality.

- Positive factor: 39% reduction in sulphide sulphur

Evidence · text

> Sulphide sulphur levels decreased from 28.8% to 20.8%, a 39% reduction.

### Fact 4

[Link to this fact](https://atlas-staging.minestarters.com/news/positive-metallurgical-results-from-initial-testwork-with-dundee-sustainable-tec--67d6318b-29c9-41e7-99ca-cbf73f7c6fe1#fact-metallurgical-facts-3)

gold

#### Identity

- Commodity: gold
- Ticker: FVL

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2025-12-16T00:00:00.000Z

Reasoning: Baseline indicated resource from July 2025 MRE.

Evidence · text

> 17.2 million ounces at 1.24 g/t Au \(indicated\)

### Fact 5

[Link to this fact](https://atlas-staging.minestarters.com/news/positive-metallurgical-results-from-initial-testwork-with-dundee-sustainable-tec--67d6318b-29c9-41e7-99ca-cbf73f7c6fe1#fact-metallurgical-facts-4)

gold

#### Identity

- Commodity: gold
- Ticker: FVL

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2025-12-16T00:00:00.000Z

Reasoning: Baseline inferred resource from July 2025 MRE.

Evidence · text

> 11.9 million ounces at 1.04 g/t Au \(inferred\)

## 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.