Omai Gold Reports Positive Metallurgical Testwork at its Omai Project with Gold Recoveries from 93% to 95%
Original announcement by tmx on
- Company
- Omai Gold Mines Corp.
- Ticker
- OMG
- Exchange
- TSX
- Region
- Guyana
- Primary commodity
- Gold
- Secondary commodities
- Copper, Lead, Zinc
- Document categories
- Resource update, Metallurgy
- Extracted
- 2026-09-18 14:49:04 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Omai Gold has reported successful Phase 1 metallurgical testwork at its Omai Project in Guyana, demonstrating gold recoveries between 93% and 95%. The results show clean mineralogy and rapid leach kinetics, supporting the upcoming Preliminary Economic Assessment (PEA).
Reasoning: The metallurgical results show high gold recoveries and clean mineralogy, which significantly de-risks the upcoming PEA for the Omai project.
Positive factors
- High gold recoveries (up to 95%)
- Clean mineralogy with no deleterious organic carbon or antimony
- Rapid leach kinetics
- SGS accredited laboratory used
- Supports upcoming PEA
Negative factors
- Testing limited to bottle roll/batch scale
Facts used in scoring: 7
Classification and evidence
High Recoverypositive
Recovery at or above the exceptional band for the commodity and processing route.
Why it applies: Gold recoveries reached 95% which is in the exceptional/strong band for gold CIL/mill routes.
Evidence · text
“95% Au extraction at 3.2 g/t Au”
Free Millingpositive
Simple, clean ore amenable to standard processing without oxidation.
Why it applies: Mineralogy is described as clean with no organic carbon or deleterious components.
Evidence · text
“Both Wenot and Gilt deposit mineralogies are clean with no deleterious components (no organic carbon, tellurides, or antimony)”
QA/QC Disclosedpositive · Story-specific tag
Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).
Why it applies: Release mentions correlation between exploration drill core assays and metallurgical head grades as a QA/QC component.
Evidence · text
“As a component of QA/QC for metallurgical test work, each composite sample was assayed and compared with the calculated weighted grade from exploration drill program sampling.”
Bench Scale Onlynegative
Only preliminary bench tests completed — no locked-cycle or pilot work.
Why it applies: The testwork was conducted using standard bottle roll leach tests.
Evidence · text
“The objective of this Phase 1 metallurgical testwork was to determine the amenability of the Wenot and Gilt gold deposits to a standard bottle roll leach and CIL circuit.”
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")
Multi-Domain Testedpositive
Variability across ore domains (oxide, transition, fresh) has been addressed.
Why it applies: 2 distinct composites were tested
Extracted facts
Stored fact records: 7. Some facts used in scoring do not have a stored record.
Resource Estimates (4)
indicatedOmai Gold Project · goldTonnes: 28400000Grade: 1.59Grade Unit: g/tContained Metal: 1453000Contained Unit: ozHistorical resultNeeds review: historical_restatementView all detailsHide details
Identity
- Project
- Omai Gold Project
- Commodity
- gold
- Region
- guyana
- Reported Region
- Guyana
- Ticker
- OMG
Resource scope
- Estimate type
- resource
- Effective date
- 2026-04-14T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Resource group id
- resource:e076c171a0acbeb6cf14
- Deposit or zone
- Wenot
- Mining method
- open_pit
- Material type
- fresh
- Ownership percent
- 100 %
Resource Data
- Category
- indicated
- Tonnes
- 28400000
- Grade
- 1.59
- Grade Unit
- g/t
- Contained Metal
- 1453000
- Contained Unit
- oz
Prior Estimate
- Resource Date
- 2026-04-14
Review
- Needs Review
- Yes
- Review Reason
- historical_restatement
- Historical
- Yes
Dates
- Event date
- 2026-06-22T00:00:00.000Z
Reasoning: The Wenot Indicated resource grew by nearly 50% in ounces.
Positive factors
- Significant tonnage and grade increase
Evidence · text
“Wenot Indicated MRE increased 49.8% to 1,453,000 ounces ("oz") of gold with an average grade of 1.59 g/t Au, contained in 28.4 million tonnes ("Mt")”
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 Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
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: qp_signed is true
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
PEA-Supportingneutral
Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.
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
inferredOmai Gold Project · goldTonnes: 92400000Grade: 1.35Grade Unit: g/tContained Metal: 3999000Contained Unit: ozHistorical resultNeeds review: historical_restatementView all detailsHide details
Identity
- Project
- Omai Gold Project
- Commodity
- gold
- Region
- guyana
- Reported Region
- Guyana
- Ticker
- OMG
Resource scope
- Estimate type
- resource
- Effective date
- 2026-04-14T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Resource group id
- resource:beee98892d41d0f90b4c
- Deposit or zone
- Wenot
- Mining method
- open_pit
- Material type
- fresh
- Ownership percent
- 100 %
Resource Data
- Category
- inferred
- Tonnes
- 92400000
- Grade
- 1.35
- Grade Unit
- g/t
- Contained Metal
- 3999000
- Contained Unit
- oz
Prior Estimate
- Resource Date
- 2026-04-14
Review
- Needs Review
- Yes
- Review Reason
- historical_restatement
- Historical
- Yes
Dates
- Event date
- 2026-06-22T00:00:00.000Z
Reasoning: Wenot Inferred resource increased by 7.6%.
Positive factors
- Significant increase in inferred ounces
Evidence · text
“Wenot Inferred MRE increased 7.6% to 3,999,000 oz grading 1.35 g/t Au, contained in 92.4 Mt”
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 Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
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: qp_signed is true
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
PEA-Supportingneutral
Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.
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
inferredOmai Gold Project · goldTonnes: 14200000Grade: 3.22Grade Unit: g/tContained Metal: 1465000Contained Unit: ozHistorical resultNeeds review: historical_restatementView all detailsHide details
Identity
- Project
- Omai Gold Project
- Commodity
- gold
- Region
- guyana
- Reported Region
- Guyana
- Ticker
- OMG
Resource scope
- Estimate type
- resource
- Effective date
- 2026-04-14T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Resource group id
- resource:ca3a616513da189180b1
- Deposit or zone
- Gilt
- Mining method
- underground
- Material type
- fresh
- Ownership percent
- 100 %
Resource Data
- Category
- inferred
- Tonnes
- 14200000
- Grade
- 3.22
- Grade Unit
- g/t
- Contained Metal
- 1465000
- Contained Unit
- oz
Prior Estimate
- Resource Date
- 2026-04-14
Review
- Needs Review
- Yes
- Review Reason
- historical_restatement
- Historical
- Yes
Dates
- Event date
- 2026-06-22T00:00:00.000Z
Reasoning: Gilt Inferred resource increased by 120%.
Positive factors
- Massive increase in inferred ounces
Evidence · text
“Gilt's Inferred MRE increased 120% to 1,465,000 oz averaging 3.22 g/t Au (in 14.2 Mt)”
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 Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
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: qp_signed is true
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
PEA-Supportingneutral
Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.
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
indicatedOmai Gold Project · goldTonnes: 9700000Grade: 3.33Grade Unit: g/tContained Metal: 1042000Contained Unit: ozView all detailsHide details
Identity
- Project
- Omai Gold Project
- Commodity
- gold
- Region
- guyana
- Reported Region
- Guyana
- Ticker
- OMG
Resource scope
- Estimate type
- resource
- Effective date
- 2026-04-14T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Resource group id
- resource:0905c7b210145dfc897e
- Deposit or zone
- Gilt
- Mining method
- underground
- Material type
- fresh
- Ownership percent
- 100 %
Resource Data
- Category
- indicated
- Tonnes
- 9700000
- Grade
- 3.33
- Grade Unit
- g/t
- Contained Metal
- 1042000
- Contained Unit
- oz
Prior Estimate
- Resource Date
- 2026-04-14
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-06-22T00:00:00.000Z
Reasoning: Gilt Indicated resource decreased by 9.5%.
Negative factors
- Indicated resource tonnage/ounces decreased
Evidence · text
“Gilt's ... Indicated MRE decreased by 9.5% to 1,042,000 oz averaging 3.33 g/t Au (in 9.7 Mt)”
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 Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
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: qp_signed is true
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
PEA-Supportingneutral
Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.
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)
bottle rollOmai Gold Project · goldRecovery: 93 %Head Grade: 1Head Grade Unit: g/tView all detailsHide details
Identity
- Project
- Omai Gold Project
- Commodity
- gold
- Region
- guyana
- Reported Region
- Guyana
- Ticker
- OMG
Test Work
- Program Status
- preliminary
- Test Type
- bottle roll
- Processing Route
- bottle roll leach and CIL circuit
- Sample
- Wenot deposit composite samples (61 samples)
- Grind P80
- 75 µm
Recovery
- Recovery
- 93 %
- Recovery Basis
- actual_test
- Head Grade
- 1
- Head Grade Unit
- g/t
Lab
- Laboratory
- SGS (Canada)
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-06-22T00:00:00.000Z
Reasoning: 93% recovery at 1.0 g/t is a strong result for a preliminary bottle roll test.
Positive factors
- High recovery at low head grade
Evidence · text
“93% gold ("Au") extraction at 1.0 g/t Au”
Tags used in scoring
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: processing_route matches the mill_cil signal
bottle rollOmai Gold Project · goldRecovery: 95 %Head Grade: 3.2Head Grade Unit: g/tView all detailsHide details
Identity
- Project
- Omai Gold Project
- Commodity
- gold
- Region
- guyana
- Reported Region
- Guyana
- Ticker
- OMG
Test Work
- Program Status
- preliminary
- Test Type
- bottle roll
- Processing Route
- bottle roll leach and CIL circuit
- Sample
- Wenot deposit composite samples (61 samples)
- Grind P80
- 75 µm
Recovery
- Recovery
- 95 %
- Recovery Basis
- actual_test
- Head Grade
- 3.2
- Head Grade Unit
- g/t
Lab
- Laboratory
- SGS (Canada)
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-06-22T00:00:00.000Z
Reasoning: 95% recovery at 3.2 g/t is an excellent result.
Positive factors
- High recovery at higher head grade
Evidence · text
“95% Au extraction at 3.2 g/t Au”
Tags used in scoring
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: processing_route matches the mill_cil signal
High Recoverypositive
Recovery at or above the exceptional band for the commodity and processing route.
Why it applies: 95% is at or above the exceptional band (95%)
bottle rollOmai Gold Project · goldRecovery: 95 %Head Grade: 3.2Head Grade Unit: g/tView all detailsHide details
Identity
- Project
- Omai Gold Project
- Commodity
- gold
- Region
- guyana
- Reported Region
- Guyana
- Ticker
- OMG
Test Work
- Program Status
- preliminary
- Test Type
- bottle roll
- Processing Route
- bottle roll leach and CIL circuit
- Sample
- Gilt deposit composite samples (11 samples)
- Grind P80
- 75 µm
Recovery
- Recovery
- 95 %
- Recovery Basis
- actual_test
- Head Grade
- 3.2
- Head Grade Unit
- g/t
Lab
- Laboratory
- SGS (Canada)
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-06-22T00:00:00.000Z
Reasoning: The maximum recovery reported was 95%.
Positive factors
- High recovery
Evidence · text
“95% Au extraction at 3.2 g/t Au”
Tags used in scoring
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: processing_route matches the mill_cil signal
High Recoverypositive
Recovery at or above the exceptional band for the commodity and processing route.
Why it applies: 95% is at or above the exceptional band (95%)
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.