Meridian Smelter Tests Deliver High Quality Blister Copper from Cabaçal Copper Concentrates
Original announcement by tmx on
- Company
- Meridian Mining plc
- Ticker
- MNO
- Exchange
- TSX
- Region
- Mato Grosso, Brazil
- Primary commodity
- Copper
- Secondary commodities
- Gold, Silver
- Document categories
- Metallurgy
- Extracted
- 2026-09-16 10:26:29 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Meridian Mining has successfully completed laboratory-scale smelting and converting tests on Cabaçal copper concentrates, producing high-purity blister copper (98.9% Cu). The resulting blister copper also contains significant gold (95.2 g/t) and silver (387.6 g/t) credits with impurity levels that outperform industry averages.
Reasoning: Laboratory-scale smelting tests successfully produced high-purity blister copper with significant gold and silver credits, confirming the marketability of the Cabaçal concentrates.
Positive factors
- High purity blister copper (98.9% Cu)
- Significant precious metal credits (95.2 g/t Au, 387.6 g/t Ag)
- Low impurity levels outperforming industry average
- Demonstrated efficient conversion of concentrates
Facts used in scoring: 3
Classification and evidence
High Recoverypositive
Recovery at or above the exceptional band for the commodity and processing route.
Why it applies: The release notes high recoveries of copper, gold, and silver in the smelting stage.
Evidence · text
“The associated high recoveries of copper, and gold and silver in the smelting stage”
Free Millingpositive
Simple, clean ore amenable to standard processing without oxidation.
Why it applies: The blister copper produced shows high purity and efficient conversion, suggesting clean mineralogy.
Evidence · text
“Cabaçal's low impurity Cu + Au-Ag sulphides exhibit superior smelting performance”
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: the document describes a flotation route ("flotation")
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: 3. Some facts used in scoring do not have a stored record.
Metallurgical Results (3)
smelting and convertingCabaçal · copperHead Grade: 98.9Head Grade Unit: %View all detailsHide details
Identity
- Project
- Cabaçal
- Commodity
- copper
- Region
- brazil
- Reported Region
- Mato Grosso, Brazil
- Ticker
- MNO
Test Work
- Program Status
- detailed
- Test Type
- smelting and converting
- Processing Route
- laboratory-scale smelting and converting
- Sample
- Cabaçal blister copper
Recovery
- Recovery Basis
- unspecified
- Head Grade
- 98.9
- Head Grade Unit
- %
- Conc. Grade
- 98.9
- Conc. Grade Unit
- %
Lab
- Laboratory
- Kingston Process Metallurgy (KPM)
- Consultant
- Flowsheets Metallurgical Consulting Inc.
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-30T00:00:00.000Z
Reasoning: High purity blister copper produced from concentrate.
Positive factors
- 98.9% purity
Evidence · text
“produced high-quality blister copper grading 98.9 % Cu”
smelting and convertingCabaçal · goldHead Grade: 95.2Head Grade Unit: g/tView all detailsHide details
Identity
- Project
- Cabaçal
- Commodity
- gold
- Region
- brazil
- Reported Region
- Mato Grosso, Brazil
- Ticker
- MNO
Test Work
- Program Status
- detailed
- Test Type
- smelting and converting
- Processing Route
- laboratory-scale smelting and converting
- Sample
- Cabaçal blister copper
Recovery
- Recovery Basis
- unspecified
- Head Grade
- 95.2
- Head Grade Unit
- g/t
- Conc. Grade
- 95.2
- Conc. Grade Unit
- g/t
Lab
- Laboratory
- Kingston Process Metallurgy (KPM)
- Consultant
- Flowsheets Metallurgical Consulting Inc.
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-30T00:00:00.000Z
Reasoning: High gold grade in the produced blister copper.
Positive factors
- Significant gold credits in blister copper
Evidence · text
“95.2 g/t Au”
smelting and convertingCabaçal · silverHead Grade: 387.6Head Grade Unit: g/tView all detailsHide details
Identity
- Project
- Cabaçal
- Commodity
- silver
- Region
- brazil
- Reported Region
- Mato Grosso, Brazil
- Ticker
- MNO
Test Work
- Program Status
- detailed
- Test Type
- smelting and converting
- Processing Route
- laboratory-scale smelting and converting
- Sample
- Cabaçal blister copper
Recovery
- Recovery Basis
- unspecified
- Head Grade
- 387.6
- Head Grade Unit
- g/t
- Conc. Grade
- 387.6
- Conc. Grade Unit
- g/t
Lab
- Laboratory
- Kingston Process Metallurgy (KPM)
- Consultant
- Flowsheets Metallurgical Consulting Inc.
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-30T00:00:00.000Z
Reasoning: High silver grade in the produced blister copper.
Positive factors
- Significant silver credits in blister copper
Evidence · text
“387.6 g/t Ag”
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.