Positive Metallurgical Results from Initial Testwork with Dundee Sustainable Technologies

Original announcement by tmx on

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

Analysis by Minestarters Atlas

Minestarters Atlas analysis

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 factors

  • Significant arsenic reduction (98%)
  • Gold concentrate grade upgrade to 24.7 g/t
  • No measurable gold loss during GlassLock process
  • Produces stable, non-toxic arsenic byproduct

Negative factors

  • Testing is currently at laboratory scale

Facts used in scoring: 5

Atlas analysis — Freegold Ventures Limited: Positive Metallurgical Results from Initial Testwork with Dundee Sustainable Technologies. 100% recovery

Classification and evidence

High Recoverypositive

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 Signedpositive

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 Resourcenegative

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 flotationgoldRecovery: 100 %View all details
Link to this fact

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 factors

  • Concentrate grade upgrade of 47%
  • 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 flotationarsenicHead Grade: 7.34Head Grade Unit: %View all details
Link to this fact

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 factors

  • 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 flotationsulfurHead Grade: 28.8Head Grade Unit: %View all details
Link to this fact

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 factors

  • 39% reduction in sulphide sulphur

Evidence · text

“Sulphide sulphur levels decreased from 28.8% to 20.8%, a 39% reduction.”
Fact 4goldView all details
Link to this fact

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 5goldView all details
Link to this fact

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.