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Original announcement by proactiveinvestors on

Company
Tertiary Minerals PLC
Ticker
TYM
Exchange
Unavailable
Region
Zambia
Primary commodity
Silver
Secondary commodities
Copper, Zinc
Document categories
Drill results
Extracted
2026-09-18 16:03:04 UTC

Analysis by Minestarters Atlas

Minestarters Atlas analysis

Summary

Tertiary Minerals PLC has identified a high-grade silver-copper-zinc zone at its Mushima North project in Zambia. The drilling results indicate that the mineralisation extends beyond the current Exploration Target and remains open at depth.

Reasoning: The announcement reports a significant high-grade silver-copper-zinc zone that extends beyond previous targets and remains open at depth, representing a strong exploration success.

Positive factors

  • high-grade zone identified
  • mineralisation extends beyond exploration target
  • remains open at depth

Facts used in scoring: 3

Classification and evidence

Step-Out Extensionpositive

Mineralization extended beyond the previously known limit.

Why it applies: Drilling shows mineralisation extending beyond the current Exploration Target.

Evidence · text

“mineralisation extending beyond the current Exploration Target”

Extracted facts

Stored fact records: 3. Some facts used in scoring do not have a stored record.

Drill Results (3)

Fact 1Mushima North · silverNeeds review: drill_no_hole_idView all details
Link to this fact

Identity

Project
Mushima North
Commodity
silver
Region
zambia
Reported Region
zambia
Ticker
TYM

Classification

Program
exploration
Sample Type
drill
Mining Method
unknown

Location

Location
Mushima North
Loc. Confidence
medium
Loc. Source
document

QA/QC

QP Signed
No
QA/QC Methods
standards

Deleterious

Deleterious Flag
No

Metal Equivalent

Assumptions Disclosed
No

Review

Needs Review
Yes
Review Reason
drill_no_hole_id
Interp. Status
scored
Historical
No

Dates

Event date
2026-09-18T00:00:00.000Z

Reasoning: Identification of a high-grade zone extending beyond the exploration target is a strong exploration signal.

Positive factors

  • high-grade zone
  • extends beyond target

Evidence · text

“identified a roughly 400-metre-long higher-grade silver-copper-zinc zone at its Mushima North project in Zambia”

Tags used in scoring

No QA/QC Disclosurenegative

Release does not disclose QA/QC — lab certification, CP/QP sign-off and assay protocols cannot be checked from this document.

Why it applies: qaqc_disclosed is not true

Cut-off Undisclosednegative

High-grade interval reported without stating the cut-off grade used for compositing.

Why it applies: no cutoff_grade was stated

Fact 2Mushima North · copperNeeds review: drill_no_hole_idView all details
Link to this fact

Identity

Project
Mushima North
Commodity
copper
Region
zambia
Reported Region
zambia
Ticker
TYM

Classification

Program
exploration
Sample Type
drill
Mining Method
unknown

Location

Location
Mushima North
Loc. Confidence
medium
Loc. Source
document

QA/QC

QP Signed
No
QA/QC Methods
standards

Deleterious

Deleterious Flag
No

Metal Equivalent

Assumptions Disclosed
No

Review

Needs Review
Yes
Review Reason
drill_no_hole_id
Interp. Status
scored
Historical
No

Dates

Event date
2026-09-18T00:00:00.000Z

Reasoning: Copper is part of the identified high-grade polymetallic zone.

Positive factors

  • part of high-grade zone

Evidence · text

“higher-grade silver-copper-zinc zone”

Tags used in scoring

No QA/QC Disclosurenegative

Release does not disclose QA/QC — lab certification, CP/QP sign-off and assay protocols cannot be checked from this document.

Why it applies: qaqc_disclosed is not true

Cut-off Undisclosednegative

High-grade interval reported without stating the cut-off grade used for compositing.

Why it applies: no cutoff_grade was stated

Fact 3Mushima North · zincNeeds review: drill_no_hole_idView all details
Link to this fact

Identity

Project
Mushima North
Commodity
zinc
Region
zambia
Reported Region
zambia
Ticker
TYM

Classification

Program
exploration
Sample Type
drill
Mining Method
unknown

Location

Location
Mushima North
Loc. Confidence
medium
Loc. Source
document

QA/QC

QP Signed
No
QA/QC Methods
standards

Deleterious

Deleterious Flag
No

Metal Equivalent

Assumptions Disclosed
No

Review

Needs Review
Yes
Review Reason
drill_no_hole_id
Interp. Status
scored
Historical
No

Dates

Event date
2026-09-18T00:00:00.000Z

Reasoning: Zinc is part of the identified high-grade polymetallic zone.

Positive factors

  • part of high-grade zone

Evidence · text

“higher-grade silver-copper-zinc zone”

Tags used in scoring

No QA/QC Disclosurenegative

Release does not disclose QA/QC — lab certification, CP/QP sign-off and assay protocols cannot be checked from this document.

Why it applies: qaqc_disclosed is not true

Cut-off Undisclosednegative

High-grade interval reported without stating the cut-off grade used for compositing.

Why it applies: no cutoff_grade was stated

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.