# AT4: Antimony and Silver Results Support Mine-to-Metal Strategy

Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554

Original source: https://www.asx.com.au/asx/v2/statistics/displayAnnouncement.do?display=pdf&idsId=03152574

Publisher: asx

Original announcement: 2026-10-14T21:14:00.000Z

Analysis by Minestarters Atlas

Atlas analysis published: 2026-10-14T22:37:46.128Z

Atlas analysis updated: 2026-10-14T22:37:46.128Z

- Company: AMERICAN TUNGSTEN & ANTIMONY LTD

- Ticker: AT4

- Exchange: ASX

- Region: Unavailable

- Primary commodity: Antimony

- Secondary commodities: Silver

- Document categories: Drill results, Metallurgy

- Extracted: 2026-10-14 22:37:46 UTC

Narrative sentiment: 0.80 · Bullish

## Minestarters Atlas summary

American Tungsten & Antimony Ltd \(AT4\) announced high-grade antimony drill results from its Antimony Canyon Project in Utah and bonanza silver rock chip results from the White Spar Project in Arizona. The drilling at Little Emma confirmed a second high-grade antimony pod, including an intercept of 0.36m at 68.1% Sb. The company also reported silver grades up to 665 g/t Ag from White Spar rock chip samples, prompting an assessment for a dedicated silver recovery circuit at its Del Sol Refinery, which previously produced 99.8% pure antimony ingot.

Reasoning: The announcement reports very high-grade antimony drill results and bonanza silver rock chip results, which significantly strengthen the company's mine-to-metal strategy and open new revenue potential. While drilling QA/QC is good, rock chip sampling has limitations and true widths are not confirmed, and deleterious elements are present.

- Positive factor: High-grade antimony intercept \(68.1% Sb\)

- Positive factor: Bonanza silver grades \(665 g/t Ag\)

- Positive factor: Confirmation of mine-to-metal strategy viability

- Positive factor: Potential for new silver revenue stream

- Positive factor: QA/QC disclosed for drilling

- Positive factor: Compositing parameters disclosed for drilling

- Positive factor: Step-out drilling extends mineralization

- Negative factor: True widths not confirmed for drill intercepts

- Negative factor: Rock chip samples are selective and not representative

- Negative factor: QA/QC limitations for rock chip samples \(no company CRMs/blanks/duplicates, unmeasured sampling precision\)

- Negative factor: Deleterious elements \(As, Hg, Tl, Mo, Pb, Ba, Sr, Cd\) present in both projects

- Negative factor: Metallurgical results are historical, not new testwork

Low confidence — this extraction should be reviewed alongside the original source.

Facts used in scoring: 26

## Classification and evidence

**Bonanza Intercept**

Polarity: positive

Definition: Exceptionally high-grade zone, well above the deposit-type norm.

Why it applies: The intercept of 0.36m at 68.1% Sb is exceptionally high-grade for antimony.

Evidence · table

> 0.36m @ 68.10% Sb

Context: 0.36

**Apparent Width Only**

Polarity: negative

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

Why it applies: Intercepts are reported as down-hole lengths and true widths are not confirmed for the drill results.

Evidence · text

> Intercepts are reported as down-hole lengths. True widths not confirmed.

**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 release states that certified reference standards and blanks were inserted at a 1:20 rate for the Antimony Canyon drilling.

Evidence · text

> QA/QC: certified reference standards and blanks at 1:20 rate.

**Compositing Transparent**

Polarity: positive

Definition: Cut-off grade and internal dilution rules are clearly stated for reported intervals.

Why it applies: The drill intercepts are reported at a nominal cut-off of 0.1% Sb with a maximum of approximately 3m internal dilution.

Evidence · text

> All intercepts reported at a nominal cut-off of 0.1% Sb with a maximum of approximately 3m internal dilution.

**Step-Out Extension**

Polarity: positive

Definition: Mineralization extended beyond the previously known limit.

Why it applies: Drilling at Little Emma has advanced the geological understanding of the Antimony Canyon stibnite system extending to the northeast of the historical open pit workings.

Evidence · text

> Drilling at Little Emma has advanced the geological understanding of the Antimony Canyon stibnite system extending to the northeast of the historical open pit workings

**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: For White Spar rock chip samples, no Company certified reference material, blank or duplicate was submitted, and sampling precision is unmeasured.

Evidence · text

> LIMITATION: all quality control in this batch was laboratory-inserted; no Company certified reference material, blank or duplicate was submitted within the sample stream. Neither laboratory standard certifies Sb or Ag at the levels reported. No field duplicates were submitted and sampling precision is unmeasured.

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: Antimony Canyon samples show elevated arsenic, mercury, thallium, and molybdenum. White Spar samples show elevated lead, barium, strontium, mercury, and cadmium.

Evidence · text

> Pathfinder element signatures flanking the pod record elevated arsenic \(1,618 ppm\), mercury \(11.7 ppm\), thallium \(100 ppm laboratory upper detection limit\), and molybdenum \(53.8 ppm\)

**Pilot Scale Complete**

Polarity: positive

Definition: Pilot or demonstration plant testing completed under continuous operation.

Why it applies: Del Sol recently produced 99.8% purity antimony ingot from White Spar material, demonstrating the processing pathway.

Evidence · text

> Del Sol recently producing 99.8% purity antimony ingot from White Spar material, exceeding Regulus II specifications.

**Stale Data Re-release**

Polarity: negative

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

Why it applies: Previously reported high-grade intercepts at Antimony Canyon \(ACO2622026 and ACP26DD010\) are re-stated for context.

Evidence · text

> Latest drilling builds on previously reported high-grade intercepts at Antimony Canyon, including: o 10.37m @ 3.98% Sb from 3.35m including 4.57m @ 8.56% Sb from 6.71m \(ACO2622026\)2 o 11.03m @ 3.1% Sb from 25.91m including 2.62m @12.54% Sb from 29.2m \(ACP26DD010\)3

**Single Domain Only**

Polarity: negative

Definition: Testing limited to one composite or domain — representativeness not established.

Why it applies: only one composite was tested

## Extracted facts

Stored fact records: 26. Some facts used in scoring do not have a stored record.

## Drill Results (25)

### ACP26DD023

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-0)

Antimony Canyon · antimony

Historical result

Needs review: historical\_restatement

#### Identity

- Hole ID: ACP26DD023
- Project: Antimony Canyon
- Commodity: antimony
- Region: usa\_ut
- Reported Region: usa\_ut
- Ticker: AT4

#### Geometry

- Grade: 18.23
- Grade Unit: %
- Intercept: 1.49 m
- From: 28.35 m
- To: 29.84 m
- Hole Depth: 54.86 m
- Intercept Depth: 28.35 m

#### Classification

- Deposit Type: other
- Program: exploration
- Sample Type: drill
- Group ID: ACP26DD023:28.35-29.84
- Mining Method: underground

#### Location

- Easting: 420819.839
- Northing: 4216636.241
- CRS: WGS84, UTM Zone 12N
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: American Assay Laboratories, Sparks, Nevada
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: standards, blanks

#### Deleterious

- Deleterious Flag: Yes
- Deleterious Elements: arsenic, mercury, thallium, molybdenum

#### Compositing

- Cutoff Grade: 0.1
- Cutoff Unit: % Sb
- Dilution Disclosed: Yes
- Max Dilution: 3 m

#### Review

- Needs Review: Yes
- Review Reason: historical\_restatement
- Interp. Status: scored
- Historical: Yes

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a very high-grade antimony intercept from new drilling, contributing to the understanding of the deposit, though true width is not confirmed and deleterious elements are noted.

- Positive factor: High-grade antimony intercept

- Positive factor: Step-out extension

- Positive factor: QA/QC disclosed

- Positive factor: Compositing transparent

- Negative factor: Apparent width only

- Negative factor: Deleterious elements present

Evidence · table

> 18.23

Context: 1.49

#### Tags used in scoring

**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: qaqc\_disclosed is true

**Compositing Transparent**

Polarity: positive

Definition: Cut-off grade and internal dilution rules are clearly stated for reported intervals.

Why it applies: cutoff\_grade and internal dilution are both stated

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: deleterious\_flag is true

### ACP26DD023

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-1)

Antimony Canyon · antimony

#### Identity

- Hole ID: ACP26DD023
- Project: Antimony Canyon
- Commodity: antimony
- Region: usa\_ut
- Reported Region: usa\_ut
- Ticker: AT4

#### Geometry

- Grade: 33.95
- Grade Unit: %
- Intercept: 0.79 m
- From: 29.05 m
- To: 29.84 m
- Hole Depth: 54.86 m
- Intercept Depth: 28.35 m

#### Classification

- Deposit Type: other
- Program: exploration
- Sample Type: drill
- Group ID: ACP26DD023:29.05-29.84
- Mining Method: underground

#### Location

- Easting: 420819.839
- Northing: 4216636.241
- CRS: WGS84, UTM Zone 12N
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: American Assay Laboratories, Sparks, Nevada
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: standards, blanks

#### Deleterious

- Deleterious Flag: Yes
- Deleterious Elements: arsenic, mercury, thallium, molybdenum

#### Compositing

- Cutoff Grade: 0.1
- Cutoff Unit: % Sb
- Dilution Disclosed: Yes
- Max Dilution: 3 m

#### Review

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

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is an exceptionally high-grade antimony sub-interval, confirming a significant mineralized pod, though true width is not confirmed and deleterious elements are noted.

- Positive factor: Bonanza intercept

- Positive factor: High-grade antimony intercept

- Positive factor: Step-out extension

- Positive factor: QA/QC disclosed

- Positive factor: Compositing transparent

- Negative factor: Apparent width only

- Negative factor: Deleterious elements present

Evidence · table

> 33.95

Context: 0.79

#### Tags used in scoring

**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: qaqc\_disclosed is true

**Compositing Transparent**

Polarity: positive

Definition: Cut-off grade and internal dilution rules are clearly stated for reported intervals.

Why it applies: cutoff\_grade and internal dilution are both stated

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: deleterious\_flag is true

### ACP26DD023

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-2)

Antimony Canyon · antimony

#### Identity

- Hole ID: ACP26DD023
- Project: Antimony Canyon
- Commodity: antimony
- Region: usa\_ut
- Reported Region: usa\_ut
- Ticker: AT4

#### Geometry

- Grade: 68.1
- Grade Unit: %
- Intercept: 0.36 m
- From: 29.05 m
- To: 29.41 m
- Hole Depth: 54.86 m
- Intercept Depth: 28.35 m

#### Classification

- Deposit Type: other
- Program: exploration
- Sample Type: drill
- Group ID: ACP26DD023:29.05-29.41
- Mining Method: underground

#### Location

- Easting: 420819.839
- Northing: 4216636.241
- CRS: WGS84, UTM Zone 12N
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: American Assay Laboratories, Sparks, Nevada
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: standards, blanks

#### Deleterious

- Deleterious Flag: Yes
- Deleterious Elements: arsenic, mercury, thallium, molybdenum

#### Compositing

- Cutoff Grade: 0.1
- Cutoff Unit: % Sb
- Dilution Disclosed: Yes
- Max Dilution: 3 m

#### Review

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

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is an exceptionally high-grade antimony sub-interval, representing near-pure massive stibnite and confirming a significant mineralized pod, though true width is not confirmed and deleterious elements are noted.

- Positive factor: Bonanza intercept

- Positive factor: High-grade antimony intercept

- Positive factor: Step-out extension

- Positive factor: QA/QC disclosed

- Positive factor: Compositing transparent

- Negative factor: Apparent width only

- Negative factor: Deleterious elements present

Evidence · table

> 68.10

Context: 0.36

#### Tags used in scoring

**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: qaqc\_disclosed is true

**Compositing Transparent**

Polarity: positive

Definition: Cut-off grade and internal dilution rules are clearly stated for reported intervals.

Why it applies: cutoff\_grade and internal dilution are both stated

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: deleterious\_flag is true

### ACP26DD027

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-3)

Antimony Canyon · antimony

#### Identity

- Hole ID: ACP26DD027
- Project: Antimony Canyon
- Commodity: antimony
- Region: usa\_ut
- Reported Region: usa\_ut
- Ticker: AT4

#### Geometry

- Grade: 0.63
- Grade Unit: %
- Intercept: 7.32 m
- From: 3.96 m
- To: 11.28 m
- Hole Depth: 54.86 m
- Intercept Depth: 3.96 m

#### Classification

- Deposit Type: other
- Program: exploration
- Sample Type: drill
- Group ID: ACP26DD027:3.96-11.28
- Mining Method: open\_pit

#### Location

- Easting: 420888.212
- Northing: 4216804.353
- CRS: WGS84, UTM Zone 12N
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: American Assay Laboratories, Sparks, Nevada
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: standards, blanks

#### Deleterious

- Deleterious Flag: Yes
- Deleterious Elements: arsenic, mercury, thallium, molybdenum

#### Compositing

- Cutoff Grade: 0.1
- Cutoff Unit: % Sb
- Dilution Disclosed: Yes
- Max Dilution: 3 m

#### Review

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

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a moderate-grade antimony intercept from new drilling, extending the mineralized system, though true width is not confirmed and deleterious elements are noted.

- Positive factor: Step-out extension

- Positive factor: QA/QC disclosed

- Positive factor: Compositing transparent

- Negative factor: Apparent width only

- Negative factor: Deleterious elements present

Evidence · table

> 0.63

Context: 7.32

#### Tags used in scoring

**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: qaqc\_disclosed is true

**Compositing Transparent**

Polarity: positive

Definition: Cut-off grade and internal dilution rules are clearly stated for reported intervals.

Why it applies: cutoff\_grade and internal dilution are both stated

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: deleterious\_flag is true

### ACP26DD027

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-4)

Antimony Canyon · antimony

#### Identity

- Hole ID: ACP26DD027
- Project: Antimony Canyon
- Commodity: antimony
- Region: usa\_ut
- Reported Region: usa\_ut
- Ticker: AT4

#### Geometry

- Grade: 1.96
- Grade Unit: %
- Intercept: 1.22 m
- From: 8.53 m
- To: 9.75 m
- Hole Depth: 54.86 m
- Intercept Depth: 3.96 m

#### Classification

- Deposit Type: other
- Program: exploration
- Sample Type: drill
- Group ID: ACP26DD027:8.53-9.75
- Mining Method: open\_pit

#### Location

- Easting: 420888.212
- Northing: 4216804.353
- CRS: WGS84, UTM Zone 12N
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: American Assay Laboratories, Sparks, Nevada
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: standards, blanks

#### Deleterious

- Deleterious Flag: Yes
- Deleterious Elements: arsenic, mercury, thallium, molybdenum

#### Compositing

- Cutoff Grade: 0.1
- Cutoff Unit: % Sb
- Dilution Disclosed: Yes
- Max Dilution: 3 m

#### Review

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

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a high-grade antimony sub-interval from new drilling, extending the mineralized system, though true width is not confirmed and deleterious elements are noted.

- Positive factor: High-grade antimony intercept

- Positive factor: Step-out extension

- Positive factor: QA/QC disclosed

- Positive factor: Compositing transparent

- Negative factor: Apparent width only

- Negative factor: Deleterious elements present

Evidence · table

> 1.96

Context: 1.22

#### Tags used in scoring

**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: qaqc\_disclosed is true

**Compositing Transparent**

Polarity: positive

Definition: Cut-off grade and internal dilution rules are clearly stated for reported intervals.

Why it applies: cutoff\_grade and internal dilution are both stated

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: deleterious\_flag is true

### ACP26DD029

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-5)

Antimony Canyon · antimony

#### Identity

- Hole ID: ACP26DD029
- Project: Antimony Canyon
- Commodity: antimony
- Region: usa\_ut
- Reported Region: usa\_ut
- Ticker: AT4

#### Geometry

- Grade: 0.28
- Grade Unit: %
- Intercept: 7.19 m
- From: 7.62 m
- To: 14.81 m
- Hole Depth: 50.29 m
- Intercept Depth: 7.62 m

#### Classification

- Deposit Type: other
- Program: exploration
- Sample Type: drill
- Group ID: ACP26DD029:7.62-14.81
- Mining Method: open\_pit

#### Location

- Easting: 420886.754
- Northing: 4216802.867
- CRS: WGS84, UTM Zone 12N
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: American Assay Laboratories, Sparks, Nevada
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: standards, blanks

#### Deleterious

- Deleterious Flag: Yes
- Deleterious Elements: arsenic, mercury, thallium, molybdenum

#### Compositing

- Cutoff Grade: 0.1
- Cutoff Unit: % Sb
- Dilution Disclosed: Yes
- Max Dilution: 3 m

#### Review

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

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a weak-grade antimony intercept from new drilling, extending the mineralized system, though true width is not confirmed and deleterious elements are noted.

- Positive factor: Step-out extension

- Positive factor: QA/QC disclosed

- Positive factor: Compositing transparent

- Negative factor: Apparent width only

- Negative factor: Deleterious elements present

Evidence · table

> 0.28

Context: 7.19

#### Tags used in scoring

**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: qaqc\_disclosed is true

**Compositing Transparent**

Polarity: positive

Definition: Cut-off grade and internal dilution rules are clearly stated for reported intervals.

Why it applies: cutoff\_grade and internal dilution are both stated

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: deleterious\_flag is true

### ACP26DD029

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-6)

Antimony Canyon · antimony

#### Identity

- Hole ID: ACP26DD029
- Project: Antimony Canyon
- Commodity: antimony
- Region: usa\_ut
- Reported Region: usa\_ut
- Ticker: AT4

#### Geometry

- Grade: 0.86
- Grade Unit: %
- Intercept: 1.83 m
- From: 8.84 m
- To: 10.67 m
- Hole Depth: 50.29 m
- Intercept Depth: 7.62 m

#### Classification

- Deposit Type: other
- Program: exploration
- Sample Type: drill
- Group ID: ACP26DD029:8.84-10.67
- Mining Method: open\_pit

#### Location

- Easting: 420886.754
- Northing: 4216802.867
- CRS: WGS84, UTM Zone 12N
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: American Assay Laboratories, Sparks, Nevada
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: standards, blanks

#### Deleterious

- Deleterious Flag: Yes
- Deleterious Elements: arsenic, mercury, thallium, molybdenum

#### Compositing

- Cutoff Grade: 0.1
- Cutoff Unit: % Sb
- Dilution Disclosed: Yes
- Max Dilution: 3 m

#### Review

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

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a moderate-grade antimony sub-interval from new drilling, extending the mineralized system, though true width is not confirmed and deleterious elements are noted.

- Positive factor: Step-out extension

- Positive factor: QA/QC disclosed

- Positive factor: Compositing transparent

- Negative factor: Apparent width only

- Negative factor: Deleterious elements present

Evidence · table

> 0.86

Context: 1.83

#### Tags used in scoring

**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: qaqc\_disclosed is true

**Compositing Transparent**

Polarity: positive

Definition: Cut-off grade and internal dilution rules are clearly stated for reported intervals.

Why it applies: cutoff\_grade and internal dilution are both stated

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: deleterious\_flag is true

### ACP26DD016

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-7)

Antimony Canyon · antimony

#### Identity

- Hole ID: ACP26DD016
- Project: Antimony Canyon
- Commodity: antimony
- Region: usa\_ut
- Reported Region: usa\_ut
- Ticker: AT4

#### Geometry

- Grade: 0.1
- Grade Unit: %
- Intercept: 0.46 m
- From: 64.86 m
- To: 65.32 m
- Hole Depth: 83.82 m
- Intercept Depth: 64.86 m

#### Classification

- Deposit Type: other
- Program: exploration
- Sample Type: drill
- Group ID: ACP26DD016:64.86-65.32
- Mining Method: underground

#### Location

- Easting: 420832.436
- Northing: 4216682.199
- CRS: WGS84, UTM Zone 12N
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: American Assay Laboratories, Sparks, Nevada
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: standards, blanks

#### Deleterious

- Deleterious Flag: Yes
- Deleterious Elements: arsenic, mercury, thallium, molybdenum

#### Compositing

- Cutoff Grade: 0.1
- Cutoff Unit: % Sb
- Dilution Disclosed: Yes
- Max Dilution: 3 m

#### Review

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

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a weak-grade antimony intercept, though it contributes to the overall understanding of the mineralized system and QA/QC was disclosed.

- Positive factor: QA/QC disclosed

- Positive factor: Compositing transparent

- Negative factor: Weak grade

- Negative factor: Apparent width only

- Negative factor: Deleterious elements present

Evidence · table

> 0.10

Context: 0.46

#### Tags used in scoring

**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: qaqc\_disclosed is true

**Compositing Transparent**

Polarity: positive

Definition: Cut-off grade and internal dilution rules are clearly stated for reported intervals.

Why it applies: cutoff\_grade and internal dilution are both stated

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: deleterious\_flag is true

### ACP26DD017

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-8)

Antimony Canyon · antimony

#### Identity

- Hole ID: ACP26DD017
- Project: Antimony Canyon
- Commodity: antimony
- Region: usa\_ut
- Reported Region: usa\_ut
- Ticker: AT4

#### Geometry

- Grade: 0.18
- Grade Unit: %
- Intercept: 1.64 m
- From: 37.37 m
- To: 39.01 m
- Hole Depth: 62.48 m
- Intercept Depth: 37.37 m

#### Classification

- Deposit Type: other
- Program: exploration
- Sample Type: drill
- Group ID: ACP26DD017:37.37-39.01
- Mining Method: underground

#### Location

- Easting: 420831.037
- Northing: 4216682.447
- CRS: WGS84, UTM Zone 12N
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: American Assay Laboratories, Sparks, Nevada
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: standards, blanks

#### Deleterious

- Deleterious Flag: Yes
- Deleterious Elements: arsenic, mercury, thallium, molybdenum

#### Compositing

- Cutoff Grade: 0.1
- Cutoff Unit: % Sb
- Dilution Disclosed: Yes
- Max Dilution: 3 m

#### Review

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

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a weak-grade antimony intercept, though it confirms continuity of the mineralized system and QA/QC was disclosed.

- Positive factor: QA/QC disclosed

- Positive factor: Compositing transparent

- Negative factor: Weak grade

- Negative factor: Apparent width only

- Negative factor: Deleterious elements present

Evidence · table

> 0.18

Context: 1.64

#### Tags used in scoring

**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: qaqc\_disclosed is true

**Compositing Transparent**

Polarity: positive

Definition: Cut-off grade and internal dilution rules are clearly stated for reported intervals.

Why it applies: cutoff\_grade and internal dilution are both stated

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: deleterious\_flag is true

### ACP26DD018

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-9)

Antimony Canyon · antimony

#### Identity

- Hole ID: ACP26DD018
- Project: Antimony Canyon
- Commodity: antimony
- Region: usa\_ut
- Reported Region: usa\_ut
- Ticker: AT4

#### Geometry

- Grade: 0.2
- Grade Unit: %
- Intercept: 2.77 m
- From: 47.98 m
- To: 50.75 m
- Hole Depth: 82.3 m
- Intercept Depth: 47.98 m

#### Classification

- Deposit Type: other
- Program: exploration
- Sample Type: drill
- Group ID: ACP26DD018:47.98-50.75
- Mining Method: underground

#### Location

- Easting: 420831.036
- Northing: 4216682.452
- CRS: WGS84, UTM Zone 12N
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: American Assay Laboratories, Sparks, Nevada
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: standards, blanks

#### Deleterious

- Deleterious Flag: Yes
- Deleterious Elements: arsenic, mercury, thallium, molybdenum

#### Compositing

- Cutoff Grade: 0.1
- Cutoff Unit: % Sb
- Dilution Disclosed: Yes
- Max Dilution: 3 m

#### Review

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

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a weak-grade antimony intercept, though it confirms continuity of the mineralized system and QA/QC was disclosed.

- Positive factor: QA/QC disclosed

- Positive factor: Compositing transparent

- Negative factor: Weak grade

- Negative factor: Apparent width only

- Negative factor: Deleterious elements present

Evidence · table

> 0.20

Context: 2.77

#### Tags used in scoring

**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: qaqc\_disclosed is true

**Compositing Transparent**

Polarity: positive

Definition: Cut-off grade and internal dilution rules are clearly stated for reported intervals.

Why it applies: cutoff\_grade and internal dilution are both stated

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: deleterious\_flag is true

### Fact 11

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-10)

White Spar · silver

#### Identity

- Project: White Spar
- Commodity: silver
- Region: usa\_az
- Reported Region: Arizona
- Ticker: AT4

#### Geometry

- Grade: 665
- Grade Unit: g/t

#### Classification

- Deposit Type: epithermal
- Sample Type: surface

#### Location

- Location: Pit/trench spoil at northern end of corridor
- Latitude: 34.41
- Longitude: -112.54
- Easting: 358033
- Northing: 3809182
- CRS: WGS84, UTM Zone 12N
- Loc. Confidence: medium
- Loc. Source: document

#### QA/QC

- Laboratory: American Assay Laboratories, Sparks, Nevada
- QA/QC Disclosed: Yes
- QP Signed: Yes

#### Deleterious

- Deleterious Flag: Yes
- Deleterious Elements: lead, barium, strontium, mercury, cadmium

#### Review

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

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is an exceptionally high-grade silver rock chip sample, indicating significant mineralization, but it is a selective surface sample with QA/QC limitations and not representative of in-situ grades or widths.

- Positive factor: Bonanza intercept

- Positive factor: High-grade silver

- Negative factor: Rock chip samples are selective and not representative

- Negative factor: QA/QC limitations

- Negative factor: Apparent width only

- Negative factor: Deleterious elements present

Evidence · table

> 665

Context: WS008

#### Tags used in scoring

**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: qaqc\_disclosed is 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

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: deleterious\_flag is true

### Fact 12

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-11)

White Spar · silver

#### Identity

- Project: White Spar
- Commodity: silver
- Region: usa\_az
- Reported Region: Arizona
- Ticker: AT4

#### Geometry

- Grade: 394
- Grade Unit: g/t

#### Classification

- Deposit Type: epithermal
- Sample Type: surface

#### Location

- Location: Quartz-rich spoil, pit at southern end of corridor
- Latitude: 34.4
- Longitude: -112.54
- Easting: 358193
- Northing: 3808599
- CRS: WGS84, UTM Zone 12N
- Loc. Confidence: medium
- Loc. Source: document

#### QA/QC

- Laboratory: American Assay Laboratories, Sparks, Nevada
- QA/QC Disclosed: Yes
- QP Signed: Yes

#### Deleterious

- Deleterious Flag: Yes
- Deleterious Elements: lead, barium, strontium, mercury, cadmium

#### Review

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

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a very high-grade silver rock chip sample, indicating significant mineralization, but it is a selective surface sample with QA/QC limitations and not representative of in-situ grades or widths.

- Positive factor: High-grade silver

- Negative factor: Rock chip samples are selective and not representative

- Negative factor: QA/QC limitations

- Negative factor: Apparent width only

- Negative factor: Deleterious elements present

Evidence · table

> 394

Context: WS007

#### Tags used in scoring

**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: qaqc\_disclosed is 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

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: deleterious\_flag is true

### Fact 13

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-12)

White Spar · silver

#### Identity

- Project: White Spar
- Commodity: silver
- Region: usa\_az
- Reported Region: Arizona
- Ticker: AT4

#### Geometry

- Grade: 432
- Grade Unit: g/t

#### Classification

- Deposit Type: epithermal
- Sample Type: surface

#### Location

- Location: Eastern lode at historic shaft - separate structure
- Latitude: 34.41
- Longitude: -112.54
- Easting: 358310
- Northing: 3809168
- CRS: WGS84, UTM Zone 12N
- Loc. Confidence: medium
- Loc. Source: document

#### QA/QC

- Laboratory: American Assay Laboratories, Sparks, Nevada
- QA/QC Disclosed: Yes
- QP Signed: Yes

#### Deleterious

- Deleterious Flag: Yes
- Deleterious Elements: lead, barium, strontium, mercury, cadmium

#### Review

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

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a very high-grade silver rock chip sample, indicating significant mineralization, but it is a selective surface sample with QA/QC limitations and not representative of in-situ grades or widths.

- Positive factor: High-grade silver

- Negative factor: Rock chip samples are selective and not representative

- Negative factor: QA/QC limitations

- Negative factor: Apparent width only

- Negative factor: Deleterious elements present

Evidence · table

> 432

Context: WS009

#### Tags used in scoring

**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: qaqc\_disclosed is 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

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: deleterious\_flag is true

### Fact 14

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-13)

White Spar · silver

#### Identity

- Project: White Spar
- Commodity: silver
- Region: usa\_az
- Reported Region: Arizona
- Ticker: AT4

#### Geometry

- Grade: 94.1
- Grade Unit: g/t

#### Classification

- Deposit Type: epithermal
- Sample Type: surface

#### Location

- Location: Eastern lode, 3.5m SW of WS009
- Latitude: 34.41
- Longitude: -112.54
- Easting: 358308
- Northing: 3809165
- CRS: WGS84, UTM Zone 12N
- Loc. Confidence: medium
- Loc. Source: document

#### QA/QC

- Laboratory: American Assay Laboratories, Sparks, Nevada
- QA/QC Disclosed: Yes
- QP Signed: Yes

#### Deleterious

- Deleterious Flag: Yes
- Deleterious Elements: lead, barium, strontium, mercury, cadmium

#### Review

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

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a high-grade silver rock chip sample, indicating mineralization, but it is a selective surface sample with QA/QC limitations and not representative of in-situ grades or widths.

- Positive factor: High-grade silver

- Negative factor: Rock chip samples are selective and not representative

- Negative factor: QA/QC limitations

- Negative factor: Apparent width only

- Negative factor: Deleterious elements present

Evidence · table

> 94.1

Context: WS010

#### Tags used in scoring

**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: qaqc\_disclosed is 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

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: deleterious\_flag is true

### Fact 15

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-14)

White Spar · silver

#### Identity

- Project: White Spar
- Commodity: silver
- Region: usa\_az
- Reported Region: Arizona
- Ticker: AT4

#### Geometry

- Grade: 12
- Grade Unit: g/t

#### Classification

- Deposit Type: epithermal
- Sample Type: surface

#### Location

- Location: Green clay hangingwall to WS002; actively worked face
- Latitude: 34.41
- Longitude: -112.54
- Easting: 358096
- Northing: 3808986
- CRS: WGS84, UTM Zone 12N
- Loc. Confidence: medium
- Loc. Source: document

#### QA/QC

- Laboratory: American Assay Laboratories, Sparks, Nevada
- QA/QC Disclosed: Yes
- QP Signed: Yes

#### Deleterious

- Deleterious Flag: Yes
- Deleterious Elements: lead, barium, strontium, mercury, cadmium

#### Review

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

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a low-grade silver rock chip sample, but it contributes to the understanding of the mineralized system, though it is a selective surface sample with QA/QC limitations.

- Negative factor: Rock chip samples are selective and not representative

- Negative factor: QA/QC limitations

- Negative factor: Apparent width only

- Negative factor: Deleterious elements present

Evidence · table

> 12.0

Context: WS001

#### Tags used in scoring

**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: qaqc\_disclosed is 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

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: deleterious\_flag is true

### Fact 16

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-15)

White Spar · silver

#### Identity

- Project: White Spar
- Commodity: silver
- Region: usa\_az
- Reported Region: Arizona
- Ticker: AT4

#### Geometry

- Grade: 24
- Grade Unit: g/t

#### Classification

- Deposit Type: epithermal
- Sample Type: surface

#### Location

- Location: Quartz vein, visible stibnite, vuggy; 148–150°/84°→238°
- Latitude: 34.41
- Longitude: -112.54
- Easting: 358096
- Northing: 3808986
- CRS: WGS84, UTM Zone 12N
- Loc. Confidence: medium
- Loc. Source: document

#### QA/QC

- Laboratory: American Assay Laboratories, Sparks, Nevada
- QA/QC Disclosed: Yes
- QP Signed: Yes

#### Deleterious

- Deleterious Flag: Yes
- Deleterious Elements: lead, barium, strontium, mercury, cadmium

#### Review

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

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a low-grade silver rock chip sample, but it contributes to the understanding of the mineralized system, though it is a selective surface sample with QA/QC limitations.

- Negative factor: Rock chip samples are selective and not representative

- Negative factor: QA/QC limitations

- Negative factor: Apparent width only

- Negative factor: Deleterious elements present

Evidence · table

> 24.0

Context: WS002

#### Tags used in scoring

**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: qaqc\_disclosed is 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

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: deleterious\_flag is true

### Fact 17

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-16)

White Spar · silver

#### Identity

- Project: White Spar
- Commodity: silver
- Region: usa\_az
- Reported Region: Arizona
- Ticker: AT4

#### Geometry

- Grade: 0.7
- Grade Unit: g/t

#### Classification

- Deposit Type: epithermal
- Sample Type: surface

#### Location

- Location: Purple footwall alteration; sharp contact with vein
- Latitude: 34.41
- Longitude: -112.54
- Easting: 358096
- Northing: 3808986
- CRS: WGS84, UTM Zone 12N
- Loc. Confidence: medium
- Loc. Source: document

#### QA/QC

- Laboratory: American Assay Laboratories, Sparks, Nevada
- QA/QC Disclosed: Yes
- QP Signed: Yes

#### Deleterious

- Deleterious Flag: Yes
- Deleterious Elements: lead, barium, strontium, mercury, cadmium

#### Review

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

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a very low-grade silver rock chip sample, but it contributes to the understanding of the mineralized system, though it is a selective surface sample with QA/QC limitations.

- Negative factor: Weak grade

- Negative factor: Rock chip samples are selective and not representative

- Negative factor: QA/QC limitations

- Negative factor: Apparent width only

- Negative factor: Deleterious elements present

Evidence · table

> 0.7

Context: WS003

#### Tags used in scoring

**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: qaqc\_disclosed is 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

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: deleterious\_flag is true

### Fact 18

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-17)

White Spar · silver

#### Identity

- Project: White Spar
- Commodity: silver
- Region: usa\_az
- Reported Region: Arizona
- Ticker: AT4

#### Geometry

- Grade: 23.4
- Grade Unit: g/t

#### Classification

- Deposit Type: epithermal
- Sample Type: surface

#### Location

- Location: Same vein, 4–5m NE, opposite side of cutting
- Latitude: 34.41
- Longitude: -112.54
- Easting: 358100
- Northing: 3808984
- CRS: WGS84, UTM Zone 12N
- Loc. Confidence: medium
- Loc. Source: document

#### QA/QC

- Laboratory: American Assay Laboratories, Sparks, Nevada
- QA/QC Disclosed: Yes
- QP Signed: Yes

#### Deleterious

- Deleterious Flag: Yes
- Deleterious Elements: lead, barium, strontium, mercury, cadmium

#### Review

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

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a low-grade silver rock chip sample, but it contributes to the understanding of the mineralized system, though it is a selective surface sample with QA/QC limitations.

- Negative factor: Rock chip samples are selective and not representative

- Negative factor: QA/QC limitations

- Negative factor: Apparent width only

- Negative factor: Deleterious elements present

Evidence · table

> 23.4

Context: WS004

#### Tags used in scoring

**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: qaqc\_disclosed is 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

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: deleterious\_flag is true

### Fact 19

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-18)

White Spar · silver

#### Identity

- Project: White Spar
- Commodity: silver
- Region: usa\_az
- Reported Region: Arizona
- Ticker: AT4

#### Geometry

- Grade: 0.6
- Grade Unit: g/t

#### Classification

- Deposit Type: epithermal
- Sample Type: surface

#### Location

- Location: Southern extension of alteration, 108 m SSE
- Latitude: 34.41
- Longitude: -112.54
- Easting: 358115
- Northing: 3808880
- CRS: WGS84, UTM Zone 12N
- Loc. Confidence: medium
- Loc. Source: document

#### QA/QC

- Laboratory: American Assay Laboratories, Sparks, Nevada
- QA/QC Disclosed: Yes
- QP Signed: Yes

#### Deleterious

- Deleterious Flag: Yes
- Deleterious Elements: lead, barium, strontium, mercury, cadmium

#### Review

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

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a very low-grade silver rock chip sample, but it contributes to the understanding of the mineralized system, though it is a selective surface sample with QA/QC limitations.

- Negative factor: Weak grade

- Negative factor: Rock chip samples are selective and not representative

- Negative factor: QA/QC limitations

- Negative factor: Apparent width only

- Negative factor: Deleterious elements present

Evidence · table

> 0.6

Context: WS005

#### Tags used in scoring

**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: qaqc\_disclosed is 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

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: deleterious\_flag is true

### Fact 20

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-19)

White Spar · silver

#### Identity

- Project: White Spar
- Commodity: silver
- Region: usa\_az
- Reported Region: Arizona
- Ticker: AT4

#### Geometry

- Grade: 17.7
- Grade Unit: g/t

#### Classification

- Deposit Type: epithermal
- Sample Type: surface

#### Location

- Location: Quartz float/spoil, southern end of corridor
- Latitude: 34.4
- Longitude: -112.54
- Easting: 358191
- Northing: 3808621
- CRS: WGS84, UTM Zone 12N
- Loc. Confidence: medium
- Loc. Source: document

#### QA/QC

- Laboratory: American Assay Laboratories, Sparks, Nevada
- QA/QC Disclosed: Yes
- QP Signed: Yes

#### Deleterious

- Deleterious Flag: Yes
- Deleterious Elements: lead, barium, strontium, mercury, cadmium

#### Review

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

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a low-grade silver rock chip sample, but it contributes to the understanding of the mineralized system, though it is a selective surface sample with QA/QC limitations.

- Negative factor: Rock chip samples are selective and not representative

- Negative factor: QA/QC limitations

- Negative factor: Apparent width only

- Negative factor: Deleterious elements present

Evidence · table

> 17.7

Context: WS006

#### Tags used in scoring

**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: qaqc\_disclosed is 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

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: deleterious\_flag is true

### Fact 21

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-20)

White Spar · silver

#### Identity

- Project: White Spar
- Commodity: silver
- Region: usa\_az
- Reported Region: Arizona
- Ticker: AT4

#### Geometry

- Grade: 1.5
- Grade Unit: g/t

#### Classification

- Deposit Type: epithermal
- Sample Type: surface

#### Location

- Location: Historic trench, 17m SSE of WS009 - local background
- Latitude: 34.41
- Longitude: -112.54
- Easting: 358316
- Northing: 3809152
- CRS: WGS84, UTM Zone 12N
- Loc. Confidence: medium
- Loc. Source: document

#### QA/QC

- Laboratory: American Assay Laboratories, Sparks, Nevada
- QA/QC Disclosed: Yes
- QP Signed: Yes

#### Deleterious

- Deleterious Flag: Yes
- Deleterious Elements: lead, barium, strontium, mercury, cadmium

#### Review

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

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a very low-grade silver rock chip sample, representing local background, though it is a selective surface sample with QA/QC limitations.

- Negative factor: Weak grade

- Negative factor: Rock chip samples are selective and not representative

- Negative factor: QA/QC limitations

- Negative factor: Apparent width only

- Negative factor: Deleterious elements present

Evidence · table

> 1.5

Context: WS011

#### Tags used in scoring

**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: qaqc\_disclosed is 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

**Deleterious Elements Present**

Polarity: negative

Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release.

Why it applies: deleterious\_flag is true

### ACO2622026

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-21)

Antimony Canyon · antimony

Historical result

Needs review: historical\_restatement

#### Identity

- Hole ID: ACO2622026
- Project: Antimony Canyon
- Commodity: antimony
- Region: usa\_ut
- Reported Region: usa\_ut
- Ticker: AT4

#### Geometry

- Grade: 3.98
- Grade Unit: %
- Intercept: 10.37 m
- From: 3.35 m
- To: 13.72 m
- Intercept Depth: 3.35 m

#### Classification

- Deposit Type: other
- Program: exploration
- Sample Type: drill
- Group ID: ACO2622026:3.35-13.72

#### QA/QC

- QA/QC Disclosed: Yes

#### Compositing

- Dilution Disclosed: Yes

#### Review

- Needs Review: Yes
- Review Reason: historical\_restatement
- Interp. Status: scored
- Historical: Yes
- Historical Source Date: 2026-06-05T00:00:00.000Z

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a previously reported high-grade antimony intercept, re-stated for context, but not new information.

- Positive factor: High-grade antimony intercept

- Negative factor: Stale data re-release

- Negative factor: Apparent width only

Evidence · text

> 10.37m @ 3.98% Sb from 3.35m including 4.57m @ 8.56% Sb from 6.71m \(ACO2622026\)

#### Tags used in scoring

**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: qaqc\_disclosed is 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

**Stale Data Re-release**

Polarity: negative

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

Why it applies: the fact restates a prior release

### ACO2622026

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-22)

Antimony Canyon · antimony

Historical result

Needs review: historical\_restatement

#### Identity

- Hole ID: ACO2622026
- Project: Antimony Canyon
- Commodity: antimony
- Region: usa\_ut
- Reported Region: usa\_ut
- Ticker: AT4

#### Geometry

- Grade: 8.56
- Grade Unit: %
- Intercept: 4.57 m
- From: 6.71 m
- To: 11.28 m
- Intercept Depth: 6.71 m

#### Classification

- Deposit Type: other
- Program: exploration
- Sample Type: drill
- Group ID: ACO2622026:6.71-11.28

#### QA/QC

- QA/QC Disclosed: Yes

#### Compositing

- Dilution Disclosed: Yes

#### Review

- Needs Review: Yes
- Review Reason: historical\_restatement
- Interp. Status: scored
- Historical: Yes
- Historical Source Date: 2026-06-05T00:00:00.000Z

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a previously reported high-grade antimony sub-interval, re-stated for context, but not new information.

- Positive factor: High-grade antimony intercept

- Negative factor: Stale data re-release

- Negative factor: Apparent width only

Evidence · text

> 4.57m @ 8.56% Sb from 6.71m \(ACO2622026\)

#### Tags used in scoring

**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: qaqc\_disclosed is 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

**Stale Data Re-release**

Polarity: negative

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

Why it applies: the fact restates a prior release

### ACP26DD010

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-23)

Antimony Canyon · antimony

Historical result

Needs review: historical\_restatement

#### Identity

- Hole ID: ACP26DD010
- Project: Antimony Canyon
- Commodity: antimony
- Region: usa\_ut
- Reported Region: usa\_ut
- Ticker: AT4

#### Geometry

- Grade: 3.1
- Grade Unit: %
- Intercept: 11.03 m
- From: 25.91 m
- To: 36.94 m
- Intercept Depth: 25.91 m

#### Classification

- Deposit Type: other
- Program: exploration
- Sample Type: drill
- Group ID: ACP26DD010:25.91-36.94

#### QA/QC

- QA/QC Disclosed: Yes

#### Compositing

- Dilution Disclosed: Yes

#### Review

- Needs Review: Yes
- Review Reason: historical\_restatement
- Interp. Status: scored
- Historical: Yes
- Historical Source Date: 2026-03-10T00:00:00.000Z

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a previously reported high-grade antimony intercept, re-stated for context, but not new information.

- Positive factor: High-grade antimony intercept

- Negative factor: Stale data re-release

- Negative factor: Apparent width only

Evidence · text

> 11.03m @ 3.1% Sb from 25.91m including 2.62m @12.54% Sb from 29.2m \(ACP26DD010\)

#### Tags used in scoring

**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: qaqc\_disclosed is 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

**Stale Data Re-release**

Polarity: negative

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

Why it applies: the fact restates a prior release

### ACP26DD010

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-drill-facts-24)

Antimony Canyon · antimony

Historical result

Needs review: historical\_restatement

#### Identity

- Hole ID: ACP26DD010
- Project: Antimony Canyon
- Commodity: antimony
- Region: usa\_ut
- Reported Region: usa\_ut
- Ticker: AT4

#### Geometry

- Grade: 12.54
- Grade Unit: %
- Intercept: 2.62 m
- From: 29.2 m
- To: 31.82 m
- Intercept Depth: 29.2 m

#### Classification

- Deposit Type: other
- Program: exploration
- Sample Type: drill
- Group ID: ACP26DD010:29.2-31.82

#### QA/QC

- QA/QC Disclosed: Yes

#### Compositing

- Dilution Disclosed: Yes

#### Review

- Needs Review: Yes
- Review Reason: historical\_restatement
- Interp. Status: scored
- Historical: Yes
- Historical Source Date: 2026-03-10T00:00:00.000Z

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This is a previously reported high-grade antimony sub-interval, re-stated for context, but not new information.

- Positive factor: High-grade antimony intercept

- Negative factor: Stale data re-release

- Negative factor: Apparent width only

Evidence · text

> 2.62m @12.54% Sb from 29.2m \(ACP26DD010\)

#### Tags used in scoring

**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: qaqc\_disclosed is 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

**Stale Data Re-release**

Polarity: negative

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

Why it applies: the fact restates a prior release

## Metallurgical Results (1)

### electrowinning and fire refining

[Link to this fact](https://atlas-staging.minestarters.com/news/at4-antimony-and-silver-results-support-mine-to-metal-strategy--0e0e4257-fb30-43c9-95f1-8c895bbfd554#fact-metallurgical-facts-25)

Del Sol · antimony

Historical result

Needs review: historical\_restatement

#### Identity

- Project: Del Sol
- Commodity: antimony
- Region: usa\_az
- Reported Region: Arizona
- Ticker: AT4

#### Test Work

- Program Status: detailed
- Test Type: electrowinning and fire refining
- Processing Route: electrowinning and fire refining
- Sample: White Spar material

#### Recovery

- Head Grade: 99.8
- Head Grade Unit: %
- Conc. Grade: 99.8
- Conc. Grade Unit: %

#### Lab

- Laboratory: American Assay Laboratories, Sparks, Nevada

#### Review

- Needs Review: Yes
- Review Reason: historical\_restatement
- Historical: Yes
- Historical Source Date: 2026-10-13T00:00:00.000Z

#### Dates

- Event date: 2026-10-14T00:00:00.000Z

Reasoning: This fact confirms the successful production of high-purity antimony ingot from White Spar material, demonstrating the viability of the mine-to-metal strategy, though it is a reiteration of previously announced results.

- Positive factor: Pilot scale complete

- Positive factor: High purity product

- Negative factor: Stale data re-release

Evidence · text

> Del Sol recently producing 99.8% purity antimony ingot from White Spar material, exceeding Regulus II specifications.

## 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.