Ucore Updates Mineral Resource Estimate and Technical Report for Bokan Dotson-Ridge Rare Earth Property
Original announcement by orestocks on
- Company
- Ucore Rare Metals Inc.
- Ticker
- UCU
- Exchange
- TSXV
- Region
- Southeast Alaska
- Primary commodity
- Rare earth elements
- Secondary commodities
- Lanthanum, Cerium, Praseodymium, Neodymium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium, Lutetium, Yttrium
- Document categories
- Resource update
- Extracted
- 2026-10-01 04:21:55 UTC
Analysis by Minestarters Atlas
Atlas analysis published:
Minestarters Atlas analysis
Summary
Ucore Rare Metals Inc. has released an upgraded Mineral Resource Estimate for the Bokan Dotson-Ridge project in Alaska, effective April 9, 2026. The update includes 801,600 tonnes of new Measured mineralization derived from 2022 surface channel sampling, contributing to a total resource with a strong heavy rare earth oxide (HREO) profile.
Reasoning: The upgrade includes significant new measured tonnage from recent surface sampling and highlights a favorable heavy rare earth profile.
Positive factors
- Addition of 801,600 tonnes of Measured mineralization from 2022 surface channel sampling
- High HREO content (35-40% of TREO)
- Resource remains open at depth and along strike
- NI 43-101 and SEC S-K 1300 compliant reporting
Negative factors
- Exclusion of I&L Zone from current estimate
Facts used in scoring: 8
Classification and evidence
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: The Technical Report has been prepared in accordance with National Instrument 43-101.
Evidence · text
“prepared in accordance with both National Instrument 43-101 and SEC Regulation S-K 1300”
QP/CP Signedpositive
Qualified Person (QP) or Competent Person (CP) named and signed off — a member of a recognized professional association (e.g., AusIMM, SME, AIG, P.Geo) with relevant experience.
Why it applies: Mr. Jim Robinson is an independent qualified person for the purposes of NI 43-101 standards.
Evidence · text
“Mr. Robinson is an independent qualified person for the purposes of NI 43-101”
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: The resource estimate assumes a TREO cut-off of 0.4%.
Evidence · text
“Assuming TREO cut-off of 0.4%”
Extracted facts
Stored fact records: 8. Some facts used in scoring do not have a stored record.
Resource Estimates (8)
measuredBokan Dotson-Ridge · total rare earth oxidesTonnes: 801600Grade: 0.6Grade Unit: %View all detailsHide details
Identity
- Project
- Bokan Dotson-Ridge
- Commodity
- total rare earth oxides
- Region
- usa_ak
- Reported Region
- Southeast Alaska
- Ticker
- UCU
Resource scope
- Estimate type
- resource
- Reporting standards
- ni_43_101, sec_sk1300
- QP Signed
- Yes
- Qualified person names
- James Robinson
- Resource group id
- resource:0d45acbda8b4e8fde381
- Deposit or zone
- Dotson Ridge
Resource Data
- Category
- measured
- Tonnes
- 801600
- Grade
- 0.6
- Grade Unit
- %
- Cutoff Grade
- 0.4
- Cutoff Unit
- % TREO
Prior Estimate
- Resource Date
- 2026-04-09
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-04-14T00:00:00.000Z
Reasoning: New measured tonnage added to the resource.
Positive factors
- New measured tonnes added from 2022 sampling
Evidence · text
“An additional 801,600 tonnes of newly estimated Measured mineralization grading 0.60% of total rare earths (" TREO ")”
Tags used in scoring
Measured Resourcepositive
Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves.
Why it applies: category is "measured"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
Qualified Person (QP) or Competent Person (CP) named and signed off — a member of a recognized professional association (e.g., AusIMM, SME, AIG, P.Geo) with relevant experience.
Why it applies: qp_signed is true
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
indicatedBokan Dotson-Ridge · total rare earth oxidesTonnes: 3369800Grade: 0.58Grade Unit: %View all detailsHide details
Identity
- Project
- Bokan Dotson-Ridge
- Commodity
- total rare earth oxides
- Region
- usa_ak
- Reported Region
- Southeast Alaska
- Ticker
- UCU
Resource scope
- Estimate type
- resource
- Reporting standards
- ni_43_101, sec_sk1300
- QP Signed
- Yes
- Qualified person names
- James Robinson
- Resource group id
- resource:be00461e113c2fe3338d
- Deposit or zone
- Dotson Ridge
Resource Data
- Category
- indicated
- Tonnes
- 3369800
- Grade
- 0.58
- Grade Unit
- %
- Cutoff Grade
- 0.4
- Cutoff Unit
- % TREO
Prior Estimate
- Resource Date
- 2026-04-09
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-04-14T00:00:00.000Z
Reasoning: Standard indicated resource component.
Evidence · table
“0.58”
Context: 3,369,800
Tags used in scoring
Indicated Resourcepositive
Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.
Why it applies: category is "indicated"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
Qualified Person (QP) or Competent Person (CP) named and signed off — a member of a recognized professional association (e.g., AusIMM, SME, AIG, P.Geo) with relevant experience.
Why it applies: qp_signed is true
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredBokan Dotson-Ridge · total rare earth oxidesTonnes: 980300Grade: 0.57Grade Unit: %View all detailsHide details
Identity
- Project
- Bokan Dotson-Ridge
- Commodity
- total rare earth oxides
- Region
- usa_ak
- Reported Region
- Southeast Alaska
- Ticker
- UCU
Resource scope
- Estimate type
- resource
- Reporting standards
- ni_43_101, sec_sk1300
- QP Signed
- Yes
- Qualified person names
- James Robinson
- Resource group id
- resource:2bc0b92c08b39e69c1d2
- Deposit or zone
- Dotson Ridge
Resource Data
- Category
- inferred
- Tonnes
- 980300
- Grade
- 0.57
- Grade Unit
- %
- Cutoff Grade
- 0.4
- Cutoff Unit
- % TREO
Prior Estimate
- Resource Date
- 2026-04-09
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-04-14T00:00:00.000Z
Reasoning: Inferred resource component.
Evidence · table
“0.57”
Context: 980,300
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
Qualified Person (QP) or Competent Person (CP) named and signed off — a member of a recognized professional association (e.g., AusIMM, SME, AIG, P.Geo) with relevant experience.
Why it applies: qp_signed is true
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
measuredBokan Dotson-Ridge · lanthanum oxideTonnes: 801600Grade: 0.07Grade Unit: %View all detailsHide details
Identity
- Project
- Bokan Dotson-Ridge
- Commodity
- lanthanum oxide
- Region
- usa_ak
- Reported Region
- Southeast Alaska
- Ticker
- UCU
Resource scope
- Estimate type
- resource
- Reporting standards
- ni_43_101, sec_sk1300
- QP Signed
- Yes
- Qualified person names
- James Robinson
- Resource group id
- resource:0d45acbda8b4e8fde381
- Deposit or zone
- Dotson Ridge
Resource Data
- Category
- measured
- Tonnes
- 801600
- Grade
- 0.07
- Grade Unit
- %
- Cutoff Grade
- 0.4
- Cutoff Unit
- %
Prior Estimate
- Resource Date
- 2026-04-09
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-04-14T00:00:00.000Z
Reasoning: Individual oxide component of measured resource.
Evidence · table
“0.07”
Context: MEASURED
Tags used in scoring
Measured Resourcepositive
Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves.
Why it applies: category is "measured"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
Qualified Person (QP) or Competent Person (CP) named and signed off — a member of a recognized professional association (e.g., AusIMM, SME, AIG, P.Geo) with relevant experience.
Why it applies: qp_signed is true
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
measuredBokan Dotson-Ridge · cerium oxideTonnes: 801600Grade: 0.18Grade Unit: %View all detailsHide details
Identity
- Project
- Bokan Dotson-Ridge
- Commodity
- cerium oxide
- Region
- usa_ak
- Reported Region
- Southeast Alaska
- Ticker
- UCU
Resource scope
- Estimate type
- resource
- Reporting standards
- ni_43_101, sec_sk1300
- QP Signed
- Yes
- Qualified person names
- James Robinson
- Resource group id
- resource:0d45acbda8b4e8fde381
- Deposit or zone
- Dotson Ridge
Resource Data
- Category
- measured
- Tonnes
- 801600
- Grade
- 0.18
- Grade Unit
- %
- Cutoff Grade
- 0.4
- Cutoff Unit
- %
Prior Estimate
- Resource Date
- 2026-04-09
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-04-14T00:00:00.000Z
Reasoning: Individual oxide component of measured resource.
Evidence · table
“0.18”
Context: MEASURED
Tags used in scoring
Measured Resourcepositive
Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves.
Why it applies: category is "measured"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
Qualified Person (QP) or Competent Person (CP) named and signed off — a member of a recognized professional association (e.g., AusIMM, SME, AIG, P.Geo) with relevant experience.
Why it applies: qp_signed is true
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
measuredBokan Dotson-Ridge · praseodymium oxideTonnes: 801600Grade: 0.02Grade Unit: %View all detailsHide details
Identity
- Project
- Bokan Dotson-Ridge
- Commodity
- praseodymium oxide
- Region
- usa_ak
- Reported Region
- Southeast Alaska
- Ticker
- UCU
Resource scope
- Estimate type
- resource
- Reporting standards
- ni_43_101, sec_sk1300
- QP Signed
- Yes
- Qualified person names
- James Robinson
- Resource group id
- resource:0d45acbda8b4e8fde381
- Deposit or zone
- Dotson Ridge
Resource Data
- Category
- measured
- Tonnes
- 801600
- Grade
- 0.02
- Grade Unit
- %
- Cutoff Grade
- 0.4
- Cutoff Unit
- %
Prior Estimate
- Resource Date
- 2026-04-09
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-04-14T00:00:00.000Z
Reasoning: Individual oxide component of measured resource.
Evidence · table
“0.02”
Context: MEASURED
Tags used in scoring
Measured Resourcepositive
Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves.
Why it applies: category is "measured"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
Qualified Person (QP) or Competent Person (CP) named and signed off — a member of a recognized professional association (e.g., AusIMM, SME, AIG, P.Geo) with relevant experience.
Why it applies: qp_signed is true
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
measuredBokan Dotson-Ridge · neodymium oxideTonnes: 801600Grade: 0.086Grade Unit: %View all detailsHide details
Identity
- Project
- Bokan Dotson-Ridge
- Commodity
- neodymium oxide
- Region
- usa_ak
- Reported Region
- Southeast Alaska
- Ticker
- UCU
Resource scope
- Estimate type
- resource
- Reporting standards
- ni_43_101, sec_sk1300
- QP Signed
- Yes
- Qualified person names
- James Robinson
- Resource group id
- resource:0d45acbda8b4e8fde381
- Deposit or zone
- Dotson Ridge
Resource Data
- Category
- measured
- Tonnes
- 801600
- Grade
- 0.086
- Grade Unit
- %
- Cutoff Grade
- 0.4
- Cutoff Unit
- %
Prior Estimate
- Resource Date
- 2026-04-09
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-04-14T00:00:00.000Z
Reasoning: Individual oxide component of measured resource.
Evidence · table
“0.086”
Context: MEASURED
Tags used in scoring
Measured Resourcepositive
Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves.
Why it applies: category is "measured"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
Qualified Person (QP) or Competent Person (CP) named and signed off — a member of a recognized professional association (e.g., AusIMM, SME, AIG, P.Geo) with relevant experience.
Why it applies: qp_signed is true
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
measuredBokan Dotson-Ridge · samarium oxideTonnes: 801600Grade: 0.022Grade Unit: %View all detailsHide details
Identity
- Project
- Bokan Dotson-Ridge
- Commodity
- samarium oxide
- Region
- usa_ak
- Reported Region
- Southeast Alaska
- Ticker
- UCU
Resource scope
- Estimate type
- resource
- Reporting standards
- ni_43_101, sec_sk1300
- QP Signed
- Yes
- Qualified person names
- James Robinson
- Resource group id
- resource:0d45acbda8b4e8fde381
- Deposit or zone
- Dotson Ridge
Resource Data
- Category
- measured
- Tonnes
- 801600
- Grade
- 0.022
- Grade Unit
- %
- Cutoff Grade
- 0.4
- Cutoff Unit
- %
Prior Estimate
- Resource Date
- 2026-04-09
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-04-14T00:00:00.000Z
Reasoning: Individual oxide component of measured resource.
Evidence · table
“0.022”
Context: MEASURED
Tags used in scoring
Measured Resourcepositive
Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves.
Why it applies: category is "measured"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
Qualified Person (QP) or Competent Person (CP) named and signed off — a member of a recognized professional association (e.g., AusIMM, SME, AIG, P.Geo) with relevant experience.
Why it applies: qp_signed is true
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
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.