Chesapeake Announces Proprietary Heap Oxidation Technology Updates
Original announcement by newsfile on
- Company
- Chesapeake Gold Corp.
- Ticker
- CKG
- Exchange
- Unavailable
- Region
- Durango, Mexico
- Primary commodity
- Gold
- Secondary commodities
- Silver
- Document categories
- Metallurgy, Resource update
- Extracted
- 2026-09-22 10:05:13 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Chesapeake Gold Corp. reported progress in its Phase III metallurgical variability testing for the Metates project in Mexico. The results show improved gold and silver recoveries achieved in significantly shorter oxidation times (90 days vs 180-240 days) and highlight the potential for further recovery gains using HPGR technology.
Reasoning: The announcement reports significant metallurgical progress in Phase III testing, specifically demonstrating improved recoveries for gold and silver within much shorter oxidation cycles, alongside promising HPGR results.
Positive factors
- Improved gold and silver recoveries in reduced oxidation time
- HPGR testwork shows significant recovery uplift
- Massive Intrusive domain reacts well to new procedures
- Silver recoveries doubled compared to Phase I
Facts used in scoring: 8
Classification and evidence
High Recoverypositive
Recovery at or above the exceptional band for the commodity and processing route.
Why it applies: Gold and silver recoveries in the Massive Intrusive domain reached 70% and 61% respectively in a 90-day heap oxidation test.
Evidence · text
“precious metal recoveries achieving 70% for gold and 61% for silver over the shortened 90-day oxidation phase”
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: The technology involves heap oxidation following crushing/HPGR processes.
Evidence · text
“proprietary heap oxidation technology”
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: Dr. Art Ibrado is named as the independent qualified person responsible for the metallurgical technical information.
Evidence · text
“Dr. Art Ibrado, P.E., of Fort Lowell Consulting PLLC, is the independent, qualified person responsible for the scientific and metallurgical technical information”
Heap Leach Routeneutral
Processing via heap leach — lower CAPEX and OPEX, lower recovery expected.
Why it applies: the document describes a heap_leach route ("heap leach")
Multi-Domain Testedpositive
Variability across ore domains (oxide, transition, fresh) has been addressed.
Why it applies: 3 distinct composites were tested
Extracted facts
Stored fact records: 8. Some facts used in scoring do not have a stored record.
Resource Estimates (2)
indicatedMetates · silverTonnes: 921200000Grade: 14.3Grade Unit: g/tContained Metal: 423.2Contained Unit: mozView all detailsHide details
Identity
- Project
- Metates
- Commodity
- silver
- Region
- mexico
- Reported Region
- Durango, Mexico
- Ticker
- CKG
Resource scope
- Estimate type
- resource
- Reporting standards
- ni_43_101
- Resource group id
- resource:95dec82c474300ae3e7e
Resource Data
- Category
- indicated
- Tonnes
- 921200000
- Grade
- 14.3
- Grade Unit
- g/t
- Contained Metal
- 423.2
- Contained Unit
- moz
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-22T00:00:00.000Z
Reasoning: Baseline resource disclosure provided for context.
Evidence · text
“423.2 million ounces of silver at 14.3 g/t within 921.2 million tonnes in the Measured and Indicated Mineral Resource category”
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
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
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
inferredMetates · silverTonnes: 139500000Grade: 13.2Grade Unit: g/tContained Metal: 59Contained Unit: mozView all detailsHide details
Identity
- Project
- Metates
- Commodity
- silver
- Region
- mexico
- Reported Region
- Durango, Mexico
- Ticker
- CKG
Resource scope
- Estimate type
- resource
- Reporting standards
- ni_43_101
- Resource group id
- resource:9527b886e31d5bbfaae1
Resource Data
- Category
- inferred
- Tonnes
- 139500000
- Grade
- 13.2
- Grade Unit
- g/t
- Contained Metal
- 59
- Contained Unit
- moz
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-22T00:00:00.000Z
Reasoning: Baseline resource disclosure provided for context.
Evidence · text
“59.0 million ounces of silver at 13.2 g/t within 139.5 million tonnes in the Inferred Mineral Resource category”
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
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
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 (6)
heap oxidationMetates · goldRecovery: 70 %View all detailsHide details
Identity
- Project
- Metates
- Commodity
- gold
- Region
- mexico
- Reported Region
- Durango, Mexico
- Ticker
- CKG
Test Work
- Program Status
- detailed
- Test Type
- heap oxidation
- Sample
- Massive Intrusive domain
Recovery
- Recovery
- 70 %
- Recovery Basis
- actual_test
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-22T00:00:00.000Z
Reasoning: High recovery achieved in a much shorter timeframe than previous phases.
Positive factors
- Significant reduction in oxidation time
Evidence · text
“precious metal recoveries achieving 70% for gold and 61% for silver over the shortened 90-day oxidation phase”
Tags used in scoring
Low Recoverynegative
Recovery below the weak band for the commodity and processing route.
Why it applies: 70% is below the weak band (80%)
heap oxidationMetates · silverRecovery: 61 %View all detailsHide details
Identity
- Project
- Metates
- Commodity
- silver
- Region
- mexico
- Reported Region
- Durango, Mexico
- Ticker
- CKG
Test Work
- Program Status
- detailed
- Test Type
- heap oxidation
- Sample
- Massive Intrusive domain
Recovery
- Recovery
- 61 %
- Recovery Basis
- actual_test
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-22T00:00:00.000Z
Reasoning: Strong silver recovery in a shortened cycle.
Positive factors
- Silver recoveries doubled compared to Phase I
Evidence · text
“precious metal recoveries achieving 70% for gold and 61% for silver over the shortened 90-day oxidation phase”
Tags used in scoring
Low Recoverynegative
Recovery below the weak band for the commodity and processing route.
Why it applies: 61% is below the weak band (75%)
heap oxidationMetates · goldRecovery: 57 %View all detailsHide details
Identity
- Project
- Metates
- Commodity
- gold
- Region
- mexico
- Reported Region
- Durango, Mexico
- Ticker
- CKG
Test Work
- Program Status
- detailed
- Test Type
- heap oxidation
- Sample
- Intrusive Breccia domain
Recovery
- Recovery
- 57 %
- Recovery Basis
- actual_test
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-22T00:00:00.000Z
Reasoning: Improved performance over previous phases for this domain.
Positive factors
- Recoveries increased compared to Phase I
Evidence · text
“precious metal recoveries increasing to 57% for gold and 60% for silver over a similar 180-day oxidation phase”
Tags used in scoring
Low Recoverynegative
Recovery below the weak band for the commodity and processing route.
Why it applies: 57% is below the weak band (80%)
heap oxidationMetates · silverRecovery: 60 %View all detailsHide details
Identity
- Project
- Metates
- Commodity
- silver
- Region
- mexico
- Reported Region
- Durango, Mexico
- Ticker
- CKG
Test Work
- Program Status
- detailed
- Test Type
- heap oxidation
- Sample
- Intrusive Breccia domain
Recovery
- Recovery
- 60 %
- Recovery Basis
- actual_test
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-22T00:00:00.000Z
Reasoning: Significant improvement in silver recovery for the breccia domain.
Positive factors
- Recoveries nearly doubled compared to Phase I
Evidence · text
“precious metal recoveries increasing to 57% for gold and 60% for silver over a similar 180-day oxidation phase”
Tags used in scoring
Low Recoverynegative
Recovery below the weak band for the commodity and processing route.
Why it applies: 60% is below the weak band (75%)
direct cyanidationMetates · goldRecovery: 47 %View all detailsHide details
Identity
- Project
- Metates
- Commodity
- gold
- Region
- mexico
- Reported Region
- Durango, Mexico
- Ticker
- CKG
Test Work
- Program Status
- detailed
- Test Type
- direct cyanidation
- Sample
- HPGR-crushed material
Recovery
- Recovery
- 47 %
- Recovery Basis
- actual_test
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-22T00:00:00.000Z
Reasoning: HPGR shows clear potential to increase baseline recoveries.
Positive factors
- Marked improvement over conventional crushing
Evidence · text
“direct cyanidation of the HPGR-crushed material showed marked improvement over conventional crushing, with gold and silver recoveries increasing by 16% and 23% to 47% and 65%, respectively”
Tags used in scoring
Low Recoverynegative
Recovery below the weak band for the commodity and processing route.
Why it applies: 47% is below the weak band (80%)
direct cyanidationMetates · silverRecovery: 65 %View all detailsHide details
Identity
- Project
- Metates
- Commodity
- silver
- Region
- mexico
- Reported Region
- Durango, Mexico
- Ticker
- CKG
Test Work
- Program Status
- detailed
- Test Type
- direct cyanidation
- Sample
- HPGR-crushed material
Recovery
- Recovery
- 65 %
- Recovery Basis
- actual_test
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-22T00:00:00.000Z
Reasoning: Significant silver recovery uplift with HPGR.
Positive factors
- Marked improvement over conventional crushing
Evidence · text
“direct cyanidation of the HPGR-crushed material showed marked improvement over conventional crushing, with gold and silver recoveries increasing by 16% and 23% to 47% and 65%, respectively”
Tags used in scoring
Low Recoverynegative
Recovery below the weak band for the commodity and processing route.
Why it applies: 65% is below the weak band (75%)
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.