# Guanajuato Silver completes tunnel linking San Ignacio and Bolanitos mines

Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/guanajuato-silver-completes-tunnel-linking-san-ignacio-and-bolanitos-mines--92570b2e-6816-4dbf-b20e-a27776e56276

Original source: https://www.mining-technology.com/news/guanajuato-tunnel-linking-san-ignacio-bolanitos/

Publisher: miningtechnology

Original announcement: 2026-10-09T17:46:15.841Z

Analysis by Minestarters Atlas

Atlas analysis published: 2026-10-09T18:16:49.962Z

Atlas analysis updated: 2026-10-13T04:03:22.980Z

- Company: Guanajuato Silver

- Ticker: Unavailable

- Exchange: Unavailable

- Region: central Mexico

- Primary commodity: Silver

- Secondary commodities: Gold

- Document categories: Drill results, Other

- Extracted: 2026-10-09 18:16:50 UTC

Narrative sentiment: 0.60 · Bullish

## Minestarters Atlas summary

Guanajuato Silver has completed a 267m-long underground production ramp connecting the San Ignacio and Bolanitos mines in central Mexico. The new tunnel is expected to improve haulage efficiency and ventilation, while sampling during construction intersected the Cecilia vein system with gold and silver grades.

Reasoning: Completion of a strategic underground ramp connecting two mines, with incidental high-grade sampling from intersected veins.

- Positive factor: infrastructure completion

- Positive factor: improved haulage efficiency

- Positive factor: mineralisation intersected during construction

Facts used in scoring: 4

## Classification and evidence

**QA/QC Disclosed**

Polarity: positive

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

Why it applies: The document mentions sampling yielded results above cut-off grades, implying assaying, but does not explicitly detail QA/QC protocols or lab certification.

Evidence · text

> Sampling across these newly accessed veins yielded results above cut-off grades

## Extracted facts

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

## Drill Results (4)

### Cecilia \#4

[Link to this fact](https://atlas-staging.minestarters.com/news/guanajuato-silver-completes-tunnel-linking-san-ignacio-and-bolanitos-mines--92570b2e-6816-4dbf-b20e-a27776e56276#fact-drill-facts-0)

Bolanitos · gold

#### Identity

- Hole ID: Cecilia \#4
- Project: Bolanitos
- Commodity: gold
- Region: mexico
- Reported Region: mexico

#### Geometry

- Grade: 6.02
- Grade Unit: g/t
- Intercept: 3.25 m

#### Classification

- Sample Type: drill
- Group ID: Cecilia \#4:0.0-3.25

#### QA/QC

- QA/QC Methods: standards

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-10-09T00:00:00.000Z

Reasoning: 6.02 g/t gold over 3.25m is a strong intercept for an epithermal/vein system.

- Positive factor: strong gold grade

Evidence · text

> 3.25m at 6.02 grams per tonne \(g/t\) gold

#### Tags used in scoring

**No QA/QC Disclosure**

Polarity: negative

Definition: 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 Undisclosed**

Polarity: negative

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

Why it applies: no cutoff\_grade was stated

### Cecilia \#4

[Link to this fact](https://atlas-staging.minestarters.com/news/guanajuato-silver-completes-tunnel-linking-san-ignacio-and-bolanitos-mines--92570b2e-6816-4dbf-b20e-a27776e56276#fact-drill-facts-1)

Bolanitos · silver

#### Identity

- Hole ID: Cecilia \#4
- Project: Bolanitos
- Commodity: silver
- Region: mexico
- Reported Region: mexico

#### Geometry

- Grade: 145
- Grade Unit: g/t
- Intercept: 3.25 m

#### Classification

- Sample Type: drill
- Group ID: Cecilia \#4:0.0-3.25

#### QA/QC

- QA/QC Methods: standards

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-10-09T00:00:00.000Z

Reasoning: 145 g/t silver accompanies strong gold grades in the Cecilia \#4 intercept.

- Positive factor: significant silver grade

Evidence · text

> 145g/t silver on Cecilia \#4

#### Tags used in scoring

**No QA/QC Disclosure**

Polarity: negative

Definition: 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 Undisclosed**

Polarity: negative

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

Why it applies: no cutoff\_grade was stated

### Cecilia \#3

[Link to this fact](https://atlas-staging.minestarters.com/news/guanajuato-silver-completes-tunnel-linking-san-ignacio-and-bolanitos-mines--92570b2e-6816-4dbf-b20e-a27776e56276#fact-drill-facts-2)

Bolanitos · gold

#### Identity

- Hole ID: Cecilia \#3
- Project: Bolanitos
- Commodity: gold
- Region: mexico
- Reported Region: mexico

#### Geometry

- Grade: 2.68
- Grade Unit: g/t
- Intercept: 1.3 m

#### Classification

- Sample Type: drill
- Group ID: Cecilia \#3:0.0-1.3

#### QA/QC

- QA/QC Methods: standards

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-10-09T00:00:00.000Z

Reasoning: 2.68 g/t gold is moderate, but the 1.3m width is relatively narrow.

- Positive factor: above cut-off

- Negative factor: narrow interval

Evidence · text

> 1.3m at 2.68g/t gold

#### Tags used in scoring

**No QA/QC Disclosure**

Polarity: negative

Definition: 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 Undisclosed**

Polarity: negative

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

Why it applies: no cutoff\_grade was stated

### Cecilia \#3

[Link to this fact](https://atlas-staging.minestarters.com/news/guanajuato-silver-completes-tunnel-linking-san-ignacio-and-bolanitos-mines--92570b2e-6816-4dbf-b20e-a27776e56276#fact-drill-facts-3)

Bolanitos · silver

#### Identity

- Hole ID: Cecilia \#3
- Project: Bolanitos
- Commodity: silver
- Region: mexico
- Reported Region: mexico

#### Geometry

- Grade: 15
- Grade Unit: g/t
- Intercept: 1.3 m

#### Classification

- Sample Type: drill
- Group ID: Cecilia \#3:0.0-1.3

#### QA/QC

- QA/QC Methods: standards

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-10-09T00:00:00.000Z

Reasoning: 15 g/t silver is relatively low for a silver-gold system.

- Negative factor: low silver grade

Evidence · text

> 15g/t silver on Cecilia \#3

#### Tags used in scoring

**No QA/QC Disclosure**

Polarity: negative

Definition: 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 Undisclosed**

Polarity: negative

Definition: 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.