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
Original announcement by tmx on
- 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
Analysis by Minestarters Atlas
Minestarters Atlas analysis
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 factors
- High proportion of Type IIa (nitrogen-free) diamonds
- Evidence of deep-sourced (sub-lithospheric) diamonds
- Low boart percentage compared to regional averages
- Favorable size frequency curve suggesting larger stones
Negative factors
- Results based on caustic fusion of drill core rather than bulk sampling
- Type IIa percentage (26%) is lower than previously reported (51%) due to different sampling parameters
Facts used in scoring: 2
Classification and evidence
Nearology Playneutral
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 1Sequoia · diamondNeeds review: drill_no_hole_idView all detailsHide details
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 factors
- Presence of Type IIa diamonds
- 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 Disclosurenegative
Release does not disclose QA/QC — lab certification, CP/QP sign-off and assay protocols cannot be checked from this document.
Why it applies: qaqc_disclosed is not true
Cut-off Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
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.