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
- 2026-09-12 04:46:38 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Freegold Ventures reported successful metallurgical testwork using the GlassLock Process™ on Golden Summit concentrate, achieving a 98% reduction in arsenic content and a 47% increase in gold concentrate grade. The results support the development of a saleable, direct-to-smelter concentrate and will inform the upcoming Pre-Feasibility Study.
Reasoning: The GlassLock Process™ successfully addressed high arsenic levels (7.34% to 0.17%) while upgrading gold concentrate grade, significantly de-risking the project's metallurgical flowsheet for the upcoming PFS.
Positive factors
- Significant arsenic reduction (98%)
- Gold concentrate grade upgrade (47%)
- High recovery (>90%) for oxidation processes
- Produces stable, non-toxic arsenic byproduct
Negative factors
- Testing performed on a small 1kg sample
Facts used in scoring: 5
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%.”
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: The document references the July 2025 MRE and discusses upcoming revisions based on 2025/2026 drilling.
Evidence · text
“The data from the 2025 and early 2026 drilling programs will be used to revise the mineral resource estimate (MRE) published in July 2025”
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: the document describes a mill_cil route ("CIL")
Gravity Routeneutral
Gravity separation forms a material part of the flowsheet.
Why it applies: the document describes a gravity route ("gravity")
Single Domain Onlynegative
Testing limited to one composite or domain — representativeness not established.
Why it applies: only one composite was tested
Extracted facts
Stored fact records: 5. Some facts used in scoring do not have a stored record.
Resource Estimates (2)
indicatedGolden Summit Project · goldTonnes: 34150000000Grade: 1.24Grade Unit: g/tContained Metal: 13600000Contained Unit: ozHistorical resultNeeds review: historical_restatementView all detailsHide details
Identity
- Project
- Golden Summit Project
- Commodity
- gold
- Region
- usa_ak
- Reported Region
- Alaska
- Ticker
- FVL
Resource scope
- Estimate type
- resource
- Resource group id
- resource:fbabe1d0f24a582c05ec
Resource Data
- Category
- indicated
- Tonnes
- 34150000000
- Grade
- 1.24
- Grade Unit
- g/t
- Contained Metal
- 13600000
- Contained Unit
- oz
- Cutoff Grade
- 0.5
- Cutoff Unit
- g/t
Review
- Needs Review
- Yes
- Review Reason
- historical_restatement
- Historical
- Yes
- Historical Source Date
- 2025-07-01T00:00:00.000Z
Dates
- Event date
- 2025-12-16T00:00:00.000Z
Reasoning: Historical resource stated for comparison.
Evidence · text
“indicated 17.2 million ounces at 1.24 g/t Au (indicated)”
Tags used in scoring
Indicated Resourcepositive
Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.
Why it applies: category is "indicated"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
PFS-Supportingneutral
Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component.
Why it applies: the release names the study this estimate supports
DFS-Supportingneutral
Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence.
Why it applies: the release names the study this estimate supports
inferredGolden Summit Project · goldTonnes: 23750000000Grade: 1.04Grade Unit: g/tContained Metal: 7700000Contained Unit: ozHistorical resultNeeds review: historical_restatementView all detailsHide details
Identity
- Project
- Golden Summit Project
- Commodity
- gold
- Region
- usa_ak
- Reported Region
- Alaska
- Ticker
- FVL
Resource scope
- Estimate type
- resource
- Resource group id
- resource:9076d88c96188dcae162
Resource Data
- Category
- inferred
- Tonnes
- 23750000000
- Grade
- 1.04
- Grade Unit
- g/t
- Contained Metal
- 7700000
- Contained Unit
- oz
- Cutoff Grade
- 0.5
- Cutoff Unit
- g/t
Review
- Needs Review
- Yes
- Review Reason
- historical_restatement
- Historical
- Yes
- Historical Source Date
- 2025-07-01T00:00:00.000Z
Dates
- Event date
- 2025-12-16T00:00:00.000Z
Reasoning: Historical resource stated for comparison.
Evidence · text
“11.9 million ounces at 1.04 g/t Au (inferred)”
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
PFS-Supportingneutral
Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component.
Why it applies: the release names the study this estimate supports
DFS-Supportingneutral
Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence.
Why it applies: the release names the study this estimate supports
Metallurgical Results (3)
locked-cycle flotationGolden Summit Project · goldRecovery: 90 %View all detailsHide details
Identity
- Project
- Golden Summit Project
- Commodity
- gold
- Region
- usa_ak
- Reported Region
- Alaska
- 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 at BaseMet Labs
Recovery
- Recovery
- 90 %
- Conc. Grade
- 24.7
- Conc. Grade Unit
- g/t Au
Lab
- Laboratory
- Dundee Sustainable Technologies
- Consultant
- Dundee Sustainable Technologies
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-12-16T00:00:00.000Z
Reasoning: High-grade concentrate achieved with no measurable gold loss during the arsenic removal process.
Positive factors
- Concentrate grade increased by 47%
- No measurable gold loss reported
Evidence · text
“The gold grade of the concentrate increased by 47%, reaching 24.7g/t Au, with no measurable gold loss”
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
Byproduct Commodityneutral
The tested commodity is a byproduct rather than the primary economic driver.
Why it applies: the release describes a byproduct credit
locked-cycle flotationGolden Summit Project · arsenicHead Grade: 7.34Head Grade Unit: %View all detailsHide details
Identity
- Project
- Golden Summit Project
- Commodity
- arsenic
- Region
- usa_ak
- Reported Region
- Alaska
- 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 at BaseMet Labs
Recovery
- Head Grade
- 7.34
- Head Grade Unit
- %
- Conc. Grade
- 0.17
- Conc. Grade Unit
- %
Lab
- Laboratory
- Dundee Sustainable Technologies
- Consultant
- Dundee Sustainable Technologies
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-12-16T00:00:00.000Z
Reasoning: Successful removal of high arsenic levels to a level suitable for direct-to-smelter sale.
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%”
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
Byproduct Commodityneutral
The tested commodity is a byproduct rather than the primary economic driver.
Why it applies: the release describes a byproduct credit
locked-cycle flotationGolden Summit Project · sulfurHead Grade: 28.8Head Grade Unit: %View all detailsHide details
Identity
- Project
- Golden Summit Project
- Commodity
- sulfur
- Region
- usa_ak
- Reported Region
- Alaska
- 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 at BaseMet Labs
Recovery
- Head Grade
- 28.8
- Head Grade Unit
- %
- Conc. Grade
- 20.8
- Conc. Grade Unit
- %
Lab
- Laboratory
- Dundee Sustainable Technologies
- Consultant
- 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”
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
Byproduct Commodityneutral
The tested commodity is a byproduct rather than the primary economic driver.
Why it applies: the release describes a byproduct credit
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.