# Further Evidence of a High Percentage of Deep-Sourced, Low Nitrogen Diamonds with Ultra-High Pressure Mineral Inclusions, a Known Association with Large High-Value Gems. Sequoia Kimberlite, NT

Canonical Atlas analysis: https://atlas-extractions.minestarters.com/news/further-evidence-of-a-high-percentage-of-deep-sourced-low-nitrogen-diamonds-with--123bb221-b4ea-4e1b-91be-c558b64caa22

Original source: https://money.tmx.com/en/quote/ADD/news/8857033493007170/further-evidence-of-a-high-percentage-of-deep-sourced-low-nitrogen-diamonds-with

Publisher: tmx

Original announcement: 2024-06-27T12:00:00.000Z

Analysis by Minestarters Atlas

Atlas analysis published: Unknown date

Atlas analysis updated: Unknown date

- Company: Arctic Star Exploration Corp.

- Ticker: ADD

- Exchange: TSX

- Region: Northwest Territories

- Primary commodity: Diamond

- Secondary commodities: None reported

- Document categories: Drill results, Other

- Extracted: 2026-09-19 13:39:29 UTC

Narrative sentiment: 0.60 · Bullish

## Minestarters Atlas summary

Arctic Star Exploration Corp. has released research results from the University of Alberta regarding the Sequoia kimberlite in the Northwest Territories. The study indicates a high proportion of high-value diamond indicators, including 26% Type IIa \(nitrogen-free\) diamonds and 37% sub-lithospheric sourced diamonds, which are associated with larger gemstones.

Reasoning: The research provides significant qualitative evidence of high-value diamond indicators \(Type IIa and deep-sourced inclusions\) at the Sequoia project, though it is not a formal resource update or grade-based drill result.

- Positive factor: High proportion of Type IIa \(nitrogen-free\) diamonds

- Positive factor: Evidence of deep-sourced \(sub-lithospheric\) diamonds

- Positive factor: Low boart percentage compared to regional averages

- Positive factor: Favorable size frequency curve suggesting larger stones

- Negative factor: Results based on caustic fusion of drill core rather than bulk sampling

- Negative factor: Type IIa percentage \(26%\) is lower than previously reported \(51%\) due to different sampling parameters

Facts used in scoring: 2

## Classification and evidence

**Nearology Play**

Polarity: neutral

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

Why it applies: The project is located within the prolific Lac de Gras kimberlite cluster.

Evidence · text

> Sequoia is part of the large Lac de Gras kimberlite cluster \(Central Slave group\)

## Extracted facts

Stored fact records: 1. Some facts used in scoring do not have a stored record.

## Drill Results (1)

### Fact 1

[Link to this fact](https://atlas-extractions.minestarters.com/news/further-evidence-of-a-high-percentage-of-deep-sourced-low-nitrogen-diamonds-with--123bb221-b4ea-4e1b-91be-c558b64caa22#fact-drill-facts-0)

Sequoia · diamond

Needs review: drill\_no\_hole\_id

#### Identity

- Project: Sequoia
- Commodity: diamond
- Region: northwest territories
- Reported Region: northwest territories
- Ticker: ADD

#### Classification

- Sample Type: drill

#### Review

- Needs Review: Yes
- Review Reason: drill\_no\_hole\_id
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2024-06-27T00:00:00.000Z

Reasoning: Qualitative indicator of high-value diamond potential.

- Positive factor: Presence of Type IIa diamonds

- Positive factor: Deep-sourced mineral inclusions

Evidence · text

> the analyses have revealed that 37% of the diamonds are sub-lithospheric in source, 26% are Type IIa \(no detectable nitrogen\)

#### 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.