Cosigo Resources Announces Results of Conglomerate Layer Bulk Sample for Gravity Concentration Tests
Original announcement by tmx on
- Company
- Cosigo Resources Ltd.
- Ticker
- CSG
- Exchange
- TSX
- Region
- Colombia
- Primary commodity
- Gold
- Secondary commodities
- None reported
- Document categories
- Metallurgy
- Extracted
- 2026-08-23 06:32:23 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Cosigo Resources reported results from Knelson gravity concentration tests on a 60kg bulk sample from the Chicken Coop conglomerate at the Taraira project. The sample had a very low weighted average gold grade of 0.03 g/t Au, with testing showing significant gold distribution across tails and concentrates.
Reasoning: The bulk sample testing on the Chicken Coop conglomerate yielded a very low weighted average head grade of 0.03 g/t Au. While gravity separation was tested, the gold is largely lost to the Knelson tails (35.2% of total Au) and the pan tails (which actually had a higher grade than the concentrate) suggest complex liberation or poor recovery efficiency.
Positive factors
- Gravity concentration demonstrated potential to recover gold into pan tails
Negative factors
- Very low head grade (0.03 g/t Au)
- High gold loss in Knelson tails
- Pan concentrate grade is low for gravity recovery
Facts used in scoring: 3
Classification and evidence
Bench Scale Onlynegative
Only preliminary bench tests completed — no locked-cycle or pilot work.
Why it applies: The testing was conducted on a 60kg composite sample using a 20kg Knelson test, which is bench-scale work.
Evidence · text
“Knelson gravity testing was conducted on a composite 60kg sample”
Gravity Routeneutral
Gravity separation forms a material part of the flowsheet.
Why it applies: The release explicitly describes Knelson gravity testing.
Evidence · text
“Knelson gravity testing was conducted”
Extracted facts
Stored fact records: 3. Some facts used in scoring do not have a stored record.
Metallurgical Results (3)
gravitygoldRecovery: 6.9 %Head Grade: 0.03Head Grade Unit: g/tView all detailsHide details
Identity
- Commodity
- gold
- Ticker
- CSG
Test Work
- Program Status
- preliminary
- Test Type
- gravity
- Processing Route
- gravity
- Sample
- 20kg Knelson gravity test - Pan Concentrate
Recovery
- Recovery
- 6.9 %
- Recovery Basis
- actual_test
- Head Grade
- 0.03
- Head Grade Unit
- g/t
- Conc. Grade
- 5.21
- Conc. Grade Unit
- g/t
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-04-07T00:00:00.000Z
Reasoning: The pan concentrate grade of 5.21 g/t Au is relatively low for a gravity concentrate.
Negative factors
- Low concentrate grade
Evidence · text
“Pan Concentrate weighing 11.2g... and assayed 5.21g/t Au, containing 6.9% of the Au in the sample.”
gravitygoldRecovery: 58 %Head Grade: 0.03Head Grade Unit: g/tView all detailsHide details
Identity
- Commodity
- gold
- Ticker
- CSG
Test Work
- Program Status
- preliminary
- Test Type
- gravity
- Processing Route
- gravity
- Sample
- 20kg Knelson gravity test - Pan Tails
Recovery
- Recovery
- 58 %
- Recovery Basis
- actual_test
- Head Grade
- 0.03
- Head Grade Unit
- g/t
- Conc. Grade
- 10.2
- Conc. Grade Unit
- g/t
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-04-07T00:00:00.000Z
Reasoning: The pan tails contained the majority of the gold (58%) at a higher grade than the concentrate.
Positive factors
- High grade in pan tails
Evidence · text
“Pan Tails were 48.1g... and assayed 10.2g/t Au, containing 58.0% of the Au in the sample.”
gravitygoldRecovery: 35.2 %Head Grade: 0.03Head Grade Unit: g/tView all detailsHide details
Identity
- Commodity
- gold
- Ticker
- CSG
Test Work
- Program Status
- preliminary
- Test Type
- gravity
- Processing Route
- gravity
- Sample
- 20kg Knelson gravity test - Knelson Tails
Recovery
- Recovery
- 35.2 %
- Recovery Basis
- actual_test
- Head Grade
- 0.03
- Head Grade Unit
- g/t
- Conc. Grade
- 0.02
- Conc. Grade Unit
- g/t
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-04-07T00:00:00.000Z
Reasoning: 35.2% of the gold in the sample was lost to the Knelson tails.
Negative factors
- High gold loss to tails
Evidence · text
“Knelson Tails were 19.9993kg... and assayed 0.02g/t Au representing 35.2% of the Au in the sample.”
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.