Tier One Silver Commences Phase 2 Drilling at High-Grade Curibaya Project in Peru

Original announcement by tmx on

Company
Tier One Silver Inc.
Ticker
TSLV
Exchange
TSX
Region
Peru
Primary commodity
Silver
Secondary commodities
Gold, Copper
Document categories
Drill results, Other
Extracted
2026-09-17 03:04:56 UTC

Analysis by Minestarters Atlas

Minestarters Atlas analysis

Summary

Tier One Silver has commenced Phase 2 diamond drilling at its Curibaya epithermal silver-gold-copper project in Peru. The program targets the undrilled Cambaya 1 corridor, aiming to test high-grade mineralization identified through previous surface channel sampling.

Reasoning: The company is commencing a new drilling phase targeting high-grade silver-gold mineralization identified via surface sampling. While no new drill assays are provided, the program targets high-potential undrilled areas.

Positive factors

  • Commencement of Phase 2 drilling targeting high-grade zones
  • Targeting undrilled high-level portion of the epithermal system
  • High-grade historical channel samples provide strong targets

Negative factors

  • No new assay results from current drilling yet

Facts used in scoring: 18

Classification and evidence

Step-Out Extensionpositive

Mineralization extended beyond the previously known limit.

Why it applies: Phase 2 targets the Cambaya 1 corridor, an undrilled portion of the system 250m above Phase 1 areas.

Evidence · text

“The Phase 2 program will focus on the Cambaya 1 corridor, an undrilled, high-level portion of the epithermal system located more than 250 metres above the areas tested in Phase 1.”

QA/QC Disclosedpositive

Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).

Why it applies: Release details QA/QC protocols including standards, blanks, and duplicates for both channel and drill samples.

Evidence · text

“QA/QC programs for channel samples using internal standard and blank samples; field and lab duplicates indicate good overall accuracy and precision.”

Apparent Width Onlynegative

Interval given as downhole width with no true width or drill orientation — apparent width may overstate true thickness.

Why it applies: True widths are explicitly stated as unknown due to orientation uncertainty.

Evidence · text

“True widths of mineralization are unknown due to the unknown mineralized zones orientation.”

Extracted facts

Stored fact records: 18. Some facts used in scoring do not have a stored record.

Drill Results (18)

Fact 1Curibaya · silverGrade: 243Grade Unit: g/tIntercept: 20 mView all details
Link to this fact

Identity

Project
Curibaya
Commodity
silver
Region
peru
Reported Region
peru
Ticker
TSLV

Geometry

Grade
243
Grade Unit
g/t
Intercept
20 m

Classification

Sample Type
surface

Location

Location
Cambaya 1 corridor
Loc. Source
document

QA/QC

QA/QC Disclosed
Yes
QP Signed
Yes

Review

Needs Review
No
Interp. Status
scored
Historical
No

Dates

Event date
2026-02-18T00:00:00.000Z

Reasoning: High-grade silver channel sample used as a target.

Positive factors

  • Very high grade silver intercept

Evidence · text

“channel samples 55 and 80 which returned 20 metres (m) of 243 grams per tonne (g/t) silver (Ag)”

Tags used in scoring

QA/QC Disclosedpositive

Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).

Why it applies: qaqc_disclosed is 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 2Curibaya · goldGrade: 0.71Grade Unit: g/tIntercept: 20 mView all details
Link to this fact

Identity

Project
Curibaya
Commodity
gold
Region
peru
Reported Region
peru
Ticker
TSLV

Geometry

Grade
0.71
Grade Unit
g/t
Intercept
20 m

Classification

Sample Type
surface

Location

Location
Cambaya 1 corridor
Loc. Source
document

QA/QC

QA/QC Disclosed
Yes
QP Signed
Yes

Review

Needs Review
No
Interp. Status
scored
Historical
No

Dates

Event date
2026-02-18T00:00:00.000Z

Reasoning: Gold grade associated with high-grade silver channel sample.

Positive factors

  • Co-occurring gold in high-grade silver zone

Evidence · text

“20 metres (m) of 243 grams per tonne (g/t) silver (Ag) and 0.71 g/t gold (Au)”

Tags used in scoring

QA/QC Disclosedpositive

Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).

Why it applies: qaqc_disclosed is 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 3Curibaya · silverGrade: 667Grade Unit: g/tIntercept: 7 mView all details
Link to this fact

Identity

Project
Curibaya
Commodity
silver
Region
peru
Reported Region
peru
Ticker
TSLV

Geometry

Grade
667
Grade Unit
g/t
Intercept
7 m

Classification

Sample Type
surface

Location

Location
Cambaya 1 corridor
Loc. Source
document

QA/QC

QA/QC Disclosed
Yes
QP Signed
Yes

Review

Needs Review
No
Interp. Status
scored
Historical
No

Dates

Event date
2026-02-18T00:00:00.000Z

Reasoning: Exceptionally high grade silver sub-interval.

Positive factors

  • Bonanza grade silver

Evidence · text

“including 7 m of 667 g/t Ag”

Tags used in scoring

QA/QC Disclosedpositive

Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).

Why it applies: qaqc_disclosed is 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 4Curibaya · goldGrade: 1.48Grade Unit: g/tIntercept: 7 mView all details
Link to this fact

Identity

Project
Curibaya
Commodity
gold
Region
peru
Reported Region
peru
Ticker
TSLV

Geometry

Grade
1.48
Grade Unit
g/t
Intercept
7 m

Classification

Sample Type
surface

Location

Location
Cambaya 1 corridor
Loc. Source
document

QA/QC

QA/QC Disclosed
Yes
QP Signed
Yes

Review

Needs Review
No
Interp. Status
scored
Historical
No

Dates

Event date
2026-02-18T00:00:00.000Z

Reasoning: Gold grade in high-grade silver sub-interval.

Evidence · text

“7 m of 667 g/t Ag and 1.48 g/t Au”

Tags used in scoring

QA/QC Disclosedpositive

Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).

Why it applies: qaqc_disclosed is 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 5Curibaya · silverGrade: 408Grade Unit: g/tIntercept: 4.5 mView all details
Link to this fact

Identity

Project
Curibaya
Commodity
silver
Region
peru
Reported Region
peru
Ticker
TSLV

Geometry

Grade
408
Grade Unit
g/t
Intercept
4.5 m

Classification

Sample Type
surface

Location

Location
Cambaya 1 corridor
Loc. Source
document

QA/QC

QA/QC Disclosed
Yes
QP Signed
Yes

Review

Needs Review
No
Interp. Status
scored
Historical
No

Dates

Event date
2026-02-18T00:00:00.000Z

Reasoning: High grade silver sub-interval.

Positive factors

  • High grade silver

Evidence · text

“4.5 m of 408 g/t Ag”

Tags used in scoring

QA/QC Disclosedpositive

Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).

Why it applies: qaqc_disclosed is 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 6Curibaya · goldGrade: 1.48Grade Unit: g/tIntercept: 4.5 mView all details
Link to this fact

Identity

Project
Curibaya
Commodity
gold
Region
peru
Reported Region
peru
Ticker
TSLV

Geometry

Grade
1.48
Grade Unit
g/t
Intercept
4.5 m

Classification

Sample Type
surface

Location

Location
Cambaya 1 corridor
Loc. Source
document

QA/QC

QA/QC Disclosed
Yes
QP Signed
Yes

Review

Needs Review
No
Interp. Status
scored
Historical
No

Dates

Event date
2026-02-18T00:00:00.000Z

Reasoning: Gold grade in high-grade silver sub-interval.

Evidence · text

“4.5 m of 408 g/t Ag and 1.48 g/t Au”

Tags used in scoring

QA/QC Disclosedpositive

Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).

Why it applies: qaqc_disclosed is 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 7Curibaya · silverGrade: 1768Grade Unit: g/tIntercept: 1 mView all details
Link to this fact

Identity

Project
Curibaya
Commodity
silver
Region
peru
Reported Region
peru
Ticker
TSLV

Geometry

Grade
1768
Grade Unit
g/t
Intercept
1 m

Classification

Sample Type
surface

Location

Location
Cambaya 1 corridor
Loc. Source
document

QA/QC

QA/QC Disclosed
Yes
QP Signed
Yes

Review

Needs Review
No
Interp. Status
scored
Historical
No

Dates

Event date
2026-02-18T00:00:00.000Z

Reasoning: Extremely high grade silver sub-interval.

Positive factors

  • Bonanza Intercept

Evidence · text

“including 1 m of 1,768 g/t Ag”

Tags used in scoring

QA/QC Disclosedpositive

Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).

Why it applies: qaqc_disclosed is 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 8Curibaya · goldGrade: 6.33Grade Unit: g/tIntercept: 1 mView all details
Link to this fact

Identity

Project
Curibaya
Commodity
gold
Region
peru
Reported Region
peru
Ticker
TSLV

Geometry

Grade
6.33
Grade Unit
g/t
Intercept
1 m

Classification

Sample Type
surface

Location

Location
Cambaya 1 corridor
Loc. Source
document

QA/QC

QA/QC Disclosed
Yes
QP Signed
Yes

Review

Needs Review
No
Interp. Status
scored
Historical
No

Dates

Event date
2026-02-18T00:00:00.000Z

Reasoning: High grade gold in silver sub-interval.

Positive factors

  • High grade gold

Evidence · text

“1 m of 1,768 g/t Ag and 6.33 g/t Au”

Tags used in scoring

QA/QC Disclosedpositive

Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).

Why it applies: qaqc_disclosed is 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 9Curibaya · silverGrade: 232Grade Unit: g/tIntercept: 11 mHistorical resultNeeds review: historical_restatementView all details
Link to this fact

Identity

Project
Curibaya
Commodity
silver
Region
peru
Reported Region
peru
Ticker
TSLV

Geometry

Grade
232
Grade Unit
g/t
Intercept
11 m

Classification

Sample Type
surface

Location

Location
Cambaya 1 corridor
Loc. Source
document

QA/QC

QA/QC Disclosed
Yes
QP Signed
Yes

Review

Needs Review
Yes
Review Reason
historical_restatement
Interp. Status
scored
Historical
Yes
Historical Source Date
2021-10-14T00:00:00.000Z

Dates

Event date
2026-02-18T00:00:00.000Z

Reasoning: High grade silver channel sample.

Evidence · text

“Platform 2 to test under channel sample 34 which returned 11 m of 232 g/t Ag”

Tags used in scoring

QA/QC Disclosedpositive

Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).

Why it applies: qaqc_disclosed is 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 10Curibaya · goldGrade: 1.61Grade Unit: g/tIntercept: 11 mHistorical resultNeeds review: historical_restatementView all details
Link to this fact

Identity

Project
Curibaya
Commodity
gold
Region
peru
Reported Region
peru
Ticker
TSLV

Geometry

Grade
1.61
Grade Unit
g/t
Intercept
11 m

Classification

Sample Type
surface

Location

Location
Cambaya 1 corridor
Loc. Source
document

QA/QC

QA/QC Disclosed
Yes
QP Signed
Yes

Review

Needs Review
Yes
Review Reason
historical_restatement
Interp. Status
scored
Historical
Yes
Historical Source Date
2021-10-14T00:00:00.000Z

Dates

Event date
2026-02-18T00:00:00.000Z

Reasoning: Gold grade in silver channel sample.

Evidence · text

“11 m of 232 g/t Ag and 1.61 g/t Au”

Tags used in scoring

QA/QC Disclosedpositive

Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).

Why it applies: qaqc_disclosed is 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 11Curibaya · silverGrade: 1660Grade Unit: g/tIntercept: 1 mHistorical resultNeeds review: historical_restatementView all details
Link to this fact

Identity

Project
Curibaya
Commodity
silver
Region
peru
Reported Region
peru
Ticker
TSLV

Geometry

Grade
1660
Grade Unit
g/t
Intercept
1 m

Classification

Sample Type
surface

Location

Location
Cambaya 1 corridor
Loc. Source
document

QA/QC

QA/QC Disclosed
Yes
QP Signed
Yes

Review

Needs Review
Yes
Review Reason
historical_restatement
Interp. Status
scored
Historical
Yes
Historical Source Date
2021-10-14T00:00:00.000Z

Dates

Event date
2026-02-18T00:00:00.000Z

Reasoning: Extremely high grade silver sub-interval.

Positive factors

  • Bonanza Intercept

Evidence · text

“including 1 m of 1,660 g/t Ag”

Tags used in scoring

QA/QC Disclosedpositive

Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).

Why it applies: qaqc_disclosed is 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 12Curibaya · goldGrade: 13.95Grade Unit: g/tIntercept: 1 mHistorical resultNeeds review: historical_restatementView all details
Link to this fact

Identity

Project
Curibaya
Commodity
gold
Region
peru
Reported Region
peru
Ticker
TSLV

Geometry

Grade
13.95
Grade Unit
g/t
Intercept
1 m

Classification

Sample Type
surface

Location

Location
Cambaya 1 corridor
Loc. Source
document

QA/QC

QA/QC Disclosed
Yes
QP Signed
Yes

Review

Needs Review
Yes
Review Reason
historical_restatement
Interp. Status
scored
Historical
Yes
Historical Source Date
2021-10-14T00:00:00.000Z

Dates

Event date
2026-02-18T00:00:00.000Z

Reasoning: High grade gold in silver sub-interval.

Positive factors

  • High grade gold

Evidence · text

“1 m of 1,660 g/t Ag and 13.95 g/t Au”

Tags used in scoring

QA/QC Disclosedpositive

Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).

Why it applies: qaqc_disclosed is 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 13Curibaya · silverGrade: 349Grade Unit: g/tIntercept: 8 mHistorical resultNeeds review: historical_restatementView all details
Link to this fact

Identity

Project
Curibaya
Commodity
silver
Region
peru
Reported Region
peru
Ticker
TSLV

Geometry

Grade
349
Grade Unit
g/t
Intercept
8 m

Classification

Sample Type
surface

Location

Location
Cambaya 1 corridor
Loc. Source
document

QA/QC

QA/QC Disclosed
Yes
QP Signed
Yes

Review

Needs Review
Yes
Review Reason
historical_restatement
Interp. Status
scored
Historical
Yes
Historical Source Date
2021-10-14T00:00:00.000Z

Dates

Event date
2026-02-18T00:00:00.000Z

Reasoning: High grade silver channel sample.

Evidence · text

“Platform 3 to test under channel sample 56 which returned 8 m of 349 g/t Ag”

Tags used in scoring

QA/QC Disclosedpositive

Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).

Why it applies: qaqc_disclosed is 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 14Curibaya · goldGrade: 0.46Grade Unit: g/tIntercept: 8 mHistorical resultNeeds review: historical_restatementView all details
Link to this fact

Identity

Project
Curibaya
Commodity
gold
Region
peru
Reported Region
peru
Ticker
TSLV

Geometry

Grade
0.46
Grade Unit
g/t
Intercept
8 m

Classification

Sample Type
surface

Location

Location
Cambaya 1 corridor
Loc. Source
document

QA/QC

QA/QC Disclosed
Yes
QP Signed
Yes

Review

Needs Review
Yes
Review Reason
historical_restatement
Interp. Status
scored
Historical
Yes
Historical Source Date
2021-10-14T00:00:00.000Z

Dates

Event date
2026-02-18T00:00:00.000Z

Reasoning: Gold grade in silver channel sample.

Evidence · text

“8 m of 349 g/t Ag and 0.46 g/t Au”

Tags used in scoring

QA/QC Disclosedpositive

Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).

Why it applies: qaqc_disclosed is 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 15Curibaya · silverGrade: 2680Grade Unit: g/tIntercept: 1 mHistorical resultNeeds review: historical_restatementView all details
Link to this fact

Identity

Project
Curibaya
Commodity
silver
Region
peru
Reported Region
peru
Ticker
TSLV

Geometry

Grade
2680
Grade Unit
g/t
Intercept
1 m

Classification

Sample Type
surface

Location

Location
Cambaya 1 corridor
Loc. Source
document

QA/QC

QA/QC Disclosed
Yes
QP Signed
Yes

Review

Needs Review
Yes
Review Reason
historical_restatement
Interp. Status
scored
Historical
Yes
Historical Source Date
2021-10-14T00:00:00.000Z

Dates

Event date
2026-02-18T00:00:00.000Z

Reasoning: Extremely high grade silver sub-interval.

Positive factors

  • Bonanza Intercept

Evidence · text

“including 1 m of 2,680 g/t Ag”

Tags used in scoring

QA/QC Disclosedpositive

Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).

Why it applies: qaqc_disclosed is 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 16Curibaya · goldGrade: 3.14Grade Unit: g/tIntercept: 1 mHistorical resultNeeds review: historical_restatementView all details
Link to this fact

Identity

Project
Curibaya
Commodity
gold
Region
peru
Reported Region
peru
Ticker
TSLV

Geometry

Grade
3.14
Grade Unit
g/t
Intercept
1 m

Classification

Sample Type
surface

Location

Location
Cambaya 1 corridor
Loc. Source
document

QA/QC

QA/QC Disclosed
Yes
QP Signed
Yes

Review

Needs Review
Yes
Review Reason
historical_restatement
Interp. Status
scored
Historical
Yes
Historical Source Date
2021-10-14T00:00:00.000Z

Dates

Event date
2026-02-18T00:00:00.000Z

Reasoning: High grade gold in silver sub-interval.

Evidence · text

“1 m of 2,680 g/t Ag and 3.14 g/t Au”

Tags used in scoring

QA/QC Disclosedpositive

Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).

Why it applies: qaqc_disclosed is 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

21CUR-016Curibaya · silverGrade: 1129Grade Unit: g/tIntercept: 1.5 mHistorical resultNeeds review: historical_restatementView all details
Link to this fact

Identity

Hole ID
21CUR-016
Project
Curibaya
Commodity
silver
Region
peru
Reported Region
peru
Ticker
TSLV

Geometry

Grade
1129
Grade Unit
g/t
Intercept
1.5 m

Classification

Sample Type
drill

Location

Location
Sambalay corridor
Loc. Source
document

QA/QC

QA/QC Disclosed
Yes
QP Signed
Yes

Review

Needs Review
Yes
Review Reason
historical_restatement
Interp. Status
scored
Historical
Yes
Historical Source Date
2022-02-14T00:00:00.000Z

Dates

Event date
2026-02-18T00:00:00.000Z

Reasoning: Historical drill hole intercept used as target.

Positive factors

  • High grade silver intercept

Evidence · text

“hole 21CUR-016 that intercepted 1.5 m of 1,129 g/t Ag”

Tags used in scoring

QA/QC Disclosedpositive

Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).

Why it applies: qaqc_disclosed is 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

21CUR-016Curibaya · goldGrade: 1.04Grade Unit: g/tIntercept: 1.5 mHistorical resultNeeds review: historical_restatementView all details
Link to this fact

Identity

Hole ID
21CUR-016
Project
Curibaya
Commodity
gold
Region
peru
Reported Region
peru
Ticker
TSLV

Geometry

Grade
1.04
Grade Unit
g/t
Intercept
1.5 m

Classification

Sample Type
drill

Location

Location
Sambalay corridor
Loc. Source
document

QA/QC

QA/QC Disclosed
Yes
QP Signed
Yes

Review

Needs Review
Yes
Review Reason
historical_restatement
Interp. Status
scored
Historical
Yes
Historical Source Date
2022-02-14T00:00:00.000Z

Dates

Event date
2026-02-18T00:00:00.000Z

Reasoning: Gold grade in historical drill hole intercept.

Evidence · text

“1.5 m of 1,129 g/t Ag and 1.04 g/t Au”

Tags used in scoring

QA/QC Disclosedpositive

Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).

Why it applies: qaqc_disclosed is 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

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.