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
- Extracted
- 2026-09-22 10:33:47 UTC
Analysis by Minestarters Atlas
Atlas analysis published:
Minestarters Atlas analysis
Summary
Chesapeake Gold Corp. reported progress in its proprietary heap oxidation technology at the Metates project, achieving improved gold and silver recoveries in significantly shorter oxidation times. The update also highlights the potential for further recovery increases using High Pressure Grinding Roll (HPGR) technology.
Reasoning: Significant metallurgical advances in oxidation time and recovery rates for both gold and silver, plus promising HPGR results, directly impact project economics.
Positive factors
- Improved gold and silver recoveries
- Reduced oxidation time (90 days vs 180/240 days)
- HPGR crushing shows significant recovery uplift
- Third-party interest in technology
Negative factors
- Contingent on San Vicente 3 concession recovery
Facts used in scoring: 6
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 (70% and 61%) are strong for heap oxidation.
Evidence · text
“precious metal recoveries achieving 70% for gold and 61% for silver”
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: The report discusses HPGR crushing and direct cyanidation as part of the optimization phase.
Evidence · text
“direct cyanidation of the HPGR-crushed material showed marked improvement”
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: 6. Some facts used in scoring do not have a stored record.
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
- Processing Route
- heap oxidation
- Sample
- Massive Intrusive domain, 90-day oxidation phase
Recovery
- Recovery
- 70 %
- Recovery Basis
- actual_test
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-22T00:00:00.000Z
Reasoning: 70% gold recovery achieved in only 90 days is a strong result for heap oxidation.
Positive factors
- High recovery in reduced 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
- Processing Route
- heap oxidation
- Sample
- Massive Intrusive domain, 90-day oxidation phase
Recovery
- Recovery
- 61 %
- Recovery Basis
- actual_test
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-22T00:00:00.000Z
Reasoning: 61% silver recovery in 90 days represents a significant improvement over previous phases.
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
- Processing Route
- heap oxidation
- Sample
- Intrusive Breccia domain, 180-day oxidation phase
Recovery
- Recovery
- 57 %
- Recovery Basis
- actual_test
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-22T00:00:00.000Z
Reasoning: 57% gold recovery in the Breccia domain shows significant improvement over prior testing.
Positive factors
- Recovery 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: 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
- Processing Route
- heap oxidation
- Sample
- Intrusive Breccia domain, 180-day oxidation phase
Recovery
- Recovery
- 60 %
- Recovery Basis
- actual_test
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-22T00:00:00.000Z
Reasoning: 60% silver recovery in the Breccia domain shows significant improvement over prior testing.
Positive factors
- Recovery 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
- Processing Route
- direct cyanidation
- Sample
- HPGR-crushed material, direct cyanidation
Recovery
- Recovery
- 47 %
- Recovery Basis
- actual_test
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-22T00:00:00.000Z
Reasoning: HPGR crushing shows a marked improvement in gold recovery prior to oxidation.
Positive factors
- 16% increase in gold recovery vs 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
- Processing Route
- direct cyanidation
- Sample
- HPGR-crushed material, direct cyanidation
Recovery
- Recovery
- 65 %
- Recovery Basis
- actual_test
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-09-22T00:00:00.000Z
Reasoning: HPGR crushing shows a marked improvement in silver recovery prior to oxidation.
Positive factors
- 23% increase in silver recovery vs 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.