STM: Exploration drilling restarts at El Palmar

Original announcement by asx on

Company
Sunstone Metals Limited
Ticker
STM
Exchange
ASX
Region
Northern Ecuador
Primary commodity
Gold
Secondary commodities
Copper
Document categories
Other, Drill results
Extracted
2026-10-06 22:17:33 UTC

Analysis by Minestarters Atlas

Atlas analysis published:

Minestarters Atlas analysis

Summary

Sunstone Metals has restarted exploration drilling at the El Palmar gold-copper project in northern Ecuador. Two drill rigs have been mobilised to test deep porphyry targets (T3) and magnetic anomalies (T1) to expand the existing mineral resource and exploration target.

Reasoning: The announcement signals the commencement of a new drilling campaign to test significant exploration targets, which is a positive operational milestone for an explorer.

Positive factors

  • Restart of exploration drilling at El Palmar
  • Mobilisation of two drill rigs
  • Testing high-conviction deep porphyry targets

Facts used in scoring: 4

Classification and evidence

Nearology Playneutral · Story-specific tag

Value premise rests on proximity to a known deposit rather than own results.

Why it applies: The project is positioned adjacent to the world-class Cascabel and Llurimagua copper projects.

Evidence · text

“The El Palmar and nearby Verde Chico concessions sit adjacent to the Toachi Fault system in northern Ecuador, which hosts the world-class 3Bt Cascabel Copper Project”

Extracted facts

Stored fact records: 4. Some facts used in scoring do not have a stored record.

Drill Results (4)

EPDD026El Palmar · goldGrade: 0.4Grade Unit: g/tIntercept: 190 mHistorical resultNeeds review: historical_restatementView all details
Link to this fact

Identity

Hole ID
EPDD026
Project
El Palmar
Commodity
gold
Region
ecuador
Reported Region
ecuador
Ticker
STM

Geometry

Grade
0.4
Grade Unit
g/t
Intercept
190 m
From
1171 m
To
1361 m
Intercept Depth
1171 m

Classification

Sample Type
drill
Group ID
EPDD026:1171-1361

QA/QC

QA/QC Methods
standards

Review

Needs Review
Yes
Review Reason
historical_restatement
Interp. Status
scored
Historical
Yes
Historical Source Date
2023-06-20T00:00:00.000Z

Dates

Event date
2026-10-06T00:00:00.000Z

Reasoning: Historical intercept reported as part of geological context.

Positive factors

  • Intersected porphyry Au-Cu mineralisation

Evidence · text

“EPDD026: 190m @ 0.40g/t Au, 0.11% Cu, 0.58g/t AuEq6 from 1,171m down-hole”

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

Stale Data Re-releasenegative

Historical results re-announced with no new assays or reinterpretation — low genuine novelty.

Why it applies: the fact restates a prior release

Nearology Playneutral

Value premise rests on proximity to a known deposit rather than own results.

Why it applies: proximity is offered as the value premise: "It is uncertain if further exploration will result in the estimation of a Resource • The El Palmar and nearby Verde Chic"

EPDD026El Palmar · copperGrade: 0.11Grade Unit: %Intercept: 190 mHistorical resultNeeds review: historical_restatementView all details
Link to this fact

Identity

Hole ID
EPDD026
Project
El Palmar
Commodity
copper
Region
ecuador
Reported Region
ecuador
Ticker
STM

Geometry

Grade
0.11
Grade Unit
%
Intercept
190 m
From
1171 m
To
1361 m
Intercept Depth
1171 m

Classification

Sample Type
drill
Group ID
EPDD026:1171-1361

QA/QC

QA/QC Methods
standards

Review

Needs Review
Yes
Review Reason
historical_restatement
Interp. Status
scored
Historical
Yes
Historical Source Date
2023-06-20T00:00:00.000Z

Dates

Event date
2026-10-06T00:00:00.000Z

Reasoning: Historical intercept reported as part of geological context.

Positive factors

  • Intersected porphyry Au-Cu mineralisation

Evidence · text

“EPDD026: 190m @ 0.40g/t Au, 0.11% Cu, 0.58g/t AuEq6 from 1,171m down-hole”

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

Stale Data Re-releasenegative

Historical results re-announced with no new assays or reinterpretation — low genuine novelty.

Why it applies: the fact restates a prior release

Nearology Playneutral

Value premise rests on proximity to a known deposit rather than own results.

Why it applies: proximity is offered as the value premise: "It is uncertain if further exploration will result in the estimation of a Resource • The El Palmar and nearby Verde Chic"

EPDD028El Palmar · goldGrade: 0.37Grade Unit: g/tIntercept: 251 mHistorical resultNeeds review: historical_restatementView all details
Link to this fact

Identity

Hole ID
EPDD028
Project
El Palmar
Commodity
gold
Region
ecuador
Reported Region
ecuador
Ticker
STM

Geometry

Grade
0.37
Grade Unit
g/t
Intercept
251 m
From
936 m
To
1187 m
Intercept Depth
936 m

Classification

Sample Type
drill
Group ID
EPDD028:936-1187

QA/QC

QA/QC Methods
standards

Review

Needs Review
Yes
Review Reason
historical_restatement
Interp. Status
scored
Historical
Yes
Historical Source Date
2023-09-11T00:00:00.000Z

Dates

Event date
2026-10-06T00:00:00.000Z

Reasoning: Historical intercept reported as part of geological context.

Positive factors

  • Intersected porphyry Au-Cu mineralisation

Evidence · text

“EPDD028: 251m @ 0.37g/t Au, 0.12% Cu, 0.56g/t AuEq6 from 936m down-hole”

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

Stale Data Re-releasenegative

Historical results re-announced with no new assays or reinterpretation — low genuine novelty.

Why it applies: the fact restates a prior release

Nearology Playneutral

Value premise rests on proximity to a known deposit rather than own results.

Why it applies: proximity is offered as the value premise: "It is uncertain if further exploration will result in the estimation of a Resource • The El Palmar and nearby Verde Chic"

EPDD028El Palmar · copperGrade: 0.12Grade Unit: %Intercept: 251 mHistorical resultNeeds review: historical_restatementView all details
Link to this fact

Identity

Hole ID
EPDD028
Project
El Palmar
Commodity
copper
Region
ecuador
Reported Region
ecuador
Ticker
STM

Geometry

Grade
0.12
Grade Unit
%
Intercept
251 m
From
936 m
To
1187 m
Intercept Depth
936 m

Classification

Sample Type
drill
Group ID
EPDD028:936-1187

QA/QC

QA/QC Methods
standards

Review

Needs Review
Yes
Review Reason
historical_restatement
Interp. Status
scored
Historical
Yes
Historical Source Date
2023-09-11T00:00:00.000Z

Dates

Event date
2026-10-06T00:00:00.000Z

Reasoning: Historical intercept reported as part of geological context.

Positive factors

  • Intersected porphyry Au-Cu mineralisation

Evidence · text

“EPDD028: 251m @ 0.37g/t Au, 0.12% Cu, 0.56g/t AuEq6 from 936m down-hole”

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

Stale Data Re-releasenegative

Historical results re-announced with no new assays or reinterpretation — low genuine novelty.

Why it applies: the fact restates a prior release

Nearology Playneutral

Value premise rests on proximity to a known deposit rather than own results.

Why it applies: proximity is offered as the value premise: "It is uncertain if further exploration will result in the estimation of a Resource • The El Palmar and nearby Verde Chic"

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.