Sitka Gold Updates Rhosgobel Gold Deposit Mineral Resource Estimate to Include Tungsten and Silver
Original announcement by tmx on
- Company
- Sitka Gold Corp.
- Ticker
- SIG
- Exchange
- TSX
- Region
- Yukon
- Primary commodity
- Gold
- Secondary commodities
- Silver, Tungsten
- Document categories
- Resource update, Metallurgy
- Extracted
- 2026-09-16 22:41:49 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Sitka Gold has updated the Rhosgobel Mineral Resource Estimate to include tungsten and silver, adding 2.93 million ounces of silver and 51,345 tonnes of tungsten trioxide to the Rhosgobel Inferred resource. Initial metallurgical testing shows strong recoveries for both gold (94.3%) and tungsten (84.7%).
Reasoning: The update meaningfully expands the Rhosgobel deposit's economic profile by adding tungsten and silver to the existing gold resource, supported by positive initial metallurgical results.
Positive factors
- Expansion of resource scope to include tungsten and silver
- High gold recovery (94.3%) and tungsten recovery (84.7%) reported
- Large-scale gold system with critical mineral (tungsten) dimension
- Significant drilling program (60,000m) currently underway
Negative factors
- Resource is entirely Inferred or Indicated (no Measured reported)
- Tungsten and silver are currently by-products
Facts used in scoring: 8
Classification and evidence
Maiden Resourceneutral
First formal MRE for the project — establishes baseline but typically exploration-stage with high Inferred component. No prior estimate exists, so every change band is not applicable.
Why it applies: The Rhosgobel deposit is described as a newly discovered deposit with a maiden resource being modelled.
Evidence · text
“The modelling for the maiden resource at Rhosgobel identified a higher grade component”
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: A significant portion of the Rhosgobel resource is classified as Inferred.
Evidence · text
“100.68 million tonnes grading 0.70 g/t gold, 0.90 g/t silver and 0.051% WO 3 containing 2,250,000 ounces of gold”
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: Ron G. Simpson of GeoSim Services Inc. is named as the independent qualified person.
Evidence · text
“The technical work of the initial MRE was completed by Ron G. Simpson of GeoSim Services Inc. an independent qualified person”
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: The MRE was prepared in accordance with NI 43-101 standards.
Evidence · text
“in accordance with the Canadian Institute of Mining, Metallurgy and Petroleum ("CIM") Definition Standards incorporated by reference in National Instrument 43-101”
High Recoverypositive
Recovery at or above the exceptional band for the commodity and processing route.
Why it applies: Gold recovery of 94.3% is in the exceptional band for CIL/CIP.
Evidence · text
“average gold recovery of 94.3% using conventional whole ore cyanidation leaching”
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: The source explicitly discloses a revised resource estimate
Evidence · text
“updated Mineral Resource Estimate”
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: the document describes a mill_cil route ("CIL")
Gravity Routeneutral
Gravity separation forms a material part of the flowsheet.
Why it applies: the document describes a gravity route ("gravity")
Single Domain Onlynegative
Testing limited to one composite or domain — representativeness not established.
Why it applies: only one composite was tested
Extracted facts
Stored fact records: 8. Some facts used in scoring do not have a stored record.
Resource Estimates (6)
indicatedRC Gold Project · goldTonnes: 39960000Grade: 1.01Grade Unit: g/tContained Metal: 1.29Contained Unit: mozView all detailsHide details
Identity
- Project
- RC Gold Project
- Commodity
- gold
- Region
- canada_yt
- Reported Region
- Yukon
- Ticker
- SIG
Resource scope
- Estimate type
- resource
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Ron G. Simpson
- Resource group id
- resource:82a27bc706e0b108e773
- Deposit or zone
- Blackjack
- Mining method
- open_pit
- Ownership percent
- 100 %
Resource Data
- Category
- indicated
- Tonnes
- 39960000
- Grade
- 1.01
- Grade Unit
- g/t
- Contained Metal
- 1.29
- Contained Unit
- moz
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-05-14T00:00:00.000Z
Reasoning: Indicated resource component of the total project gold resource.
Evidence · text
“1.29 million ounces gold indicated (39.96 Mt @ 1.01 g/t Au) at Blackjack”
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 Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was 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
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
RhosgobelRC Gold Project · goldTonnes: 100680000Grade: 0.7Grade Unit: g/tContained Metal: 2.25Contained Unit: mozView all detailsHide details
Identity
- Project
- RC Gold Project
- Commodity
- gold
- Region
- canada_yt
- Reported Region
- Yukon
- Ticker
- SIG
Resource scope
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Ron G. Simpson
- Resource group id
- resource:66ecaa42413c3bb529e3
- Deposit or zone
- Rhosgobel
- Mining method
- open_pit
- Ownership percent
- 100 %
Resource Data
- Tonnes
- 100680000
- Grade
- 0.7
- Grade Unit
- g/t
- Contained Metal
- 2.25
- Contained Unit
- moz
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-05-14T00:00:00.000Z
Reasoning: Large inferred gold resource at Rhosgobel.
Negative factors
- Inferred category
Evidence · text
“2.25 million ounces (100.68 Mt @ 0.70 g/t Au) at Rhosgobel”
Tags used in scoring
Cut-off Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was 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
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
BlackjackRC Gold Project · goldTonnes: 34600000Grade: 0.94Grade Unit: g/tContained Metal: 1.04Contained Unit: mozView all detailsHide details
Identity
- Project
- RC Gold Project
- Commodity
- gold
- Region
- canada_yt
- Reported Region
- Yukon
- Ticker
- SIG
Resource scope
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Ron G. Simpson
- Resource group id
- resource:88bd837236c0af81f425
- Deposit or zone
- Blackjack
- Mining method
- open_pit
- Ownership percent
- 100 %
Resource Data
- Tonnes
- 34600000
- Grade
- 0.94
- Grade Unit
- g/t
- Contained Metal
- 1.04
- Contained Unit
- moz
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-05-14T00:00:00.000Z
Reasoning: Inferred gold resource at Blackjack.
Evidence · text
“1.04 million ounces (34.60 Mt @ 0.94 g/t Au) at Blackjack”
Tags used in scoring
Cut-off Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was 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
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
EigerRC Gold Project · goldTonnes: 32140000Grade: 0.52Grade Unit: g/tContained Metal: 0.54Contained Unit: mozView all detailsHide details
Identity
- Project
- RC Gold Project
- Commodity
- gold
- Region
- canada_yt
- Reported Region
- Yukon
- Ticker
- SIG
Resource scope
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Ron G. Simpson
- Resource group id
- resource:2f5c52ed78cba544d93b
- Deposit or zone
- Eiger
- Mining method
- open_pit
- Ownership percent
- 100 %
Resource Data
- Tonnes
- 32140000
- Grade
- 0.52
- Grade Unit
- g/t
- Contained Metal
- 0.54
- Contained Unit
- moz
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-05-14T00:00:00.000Z
Reasoning: Inferred gold resource at Eiger.
Evidence · text
“0.54 million ounces (32.14 Mt @ 0.52 g/t Au) at Eiger”
Tags used in scoring
Cut-off Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was 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
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredRC Gold Project · silverTonnes: 100680000Grade: 0.9Grade Unit: g/tContained Metal: 2926000Contained Unit: ozView all detailsHide details
Identity
- Project
- RC Gold Project
- Commodity
- silver
- Region
- canada_yt
- Reported Region
- Yukon
- Ticker
- SIG
Resource scope
- Estimate type
- resource
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Ron G. Simpson
- Resource group id
- resource:caa719920025da30915d
- Deposit or zone
- Rhosgobel
- Mining method
- open_pit
- Ownership percent
- 100 %
Resource Data
- Category
- inferred
- Tonnes
- 100680000
- Grade
- 0.9
- Grade Unit
- g/t
- Contained Metal
- 2926000
- Contained Unit
- oz
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-05-14T00:00:00.000Z
Reasoning: Newly included silver resource at Rhosgobel.
Evidence · text
“2.93 million ounces of silver inferred (100.68 Mt @ 0.90 g/t Ag) at Rhosgobel”
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 Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was 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
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredRC Gold Project · tungstenTonnes: 100680000Grade: 0.051Grade Unit: % WO 3Contained Metal: 51345Contained Unit: tView all detailsHide details
Identity
- Project
- RC Gold Project
- Commodity
- tungsten
- Region
- canada_yt
- Reported Region
- Yukon
- Ticker
- SIG
Resource scope
- Estimate type
- resource
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Ron G. Simpson
- Resource group id
- resource:caa719920025da30915d
- Deposit or zone
- Rhosgobel
- Mining method
- open_pit
- Ownership percent
- 100 %
Resource Data
- Category
- inferred
- Tonnes
- 100680000
- Grade
- 0.051
- Grade Unit
- % WO 3
- Contained Metal
- 51345
- Contained Unit
- t
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-05-14T00:00:00.000Z
Reasoning: Newly included tungsten resource at Rhosgobel.
Evidence · text
“51,345 tonnes of WO 3 (tungsten trioxide) inferred (100.68 Mt grading 0.051% WO 3 ) at Rhosgobel”
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 Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was 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
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
Metallurgical Results (2)
Fact 1RC Gold Project · goldRecovery: 94.3 %View all detailsHide details
Identity
- Project
- RC Gold Project
- Commodity
- gold
- Region
- canada_yt
- Reported Region
- Yukon
- Ticker
- SIG
Test Work
- Processing Route
- whole ore cyanidation leaching
- Sample
- Rhosgobel whole ore
Recovery
- Recovery
- 94.3 %
- Recovery Basis
- actual_test
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-05-14T00:00:00.000Z
Reasoning: Strong gold recovery using conventional CIL/CIP methods.
Evidence · text
“average gold recovery of 94.3% using conventional whole ore cyanidation leaching”
Tags used in scoring
Byproduct Commodityneutral
The tested commodity is a byproduct rather than the primary economic driver.
Why it applies: the release describes a byproduct credit
Fact 2RC Gold Project · tungstenRecovery: 84.7 %View all detailsHide details
Identity
- Project
- RC Gold Project
- Commodity
- tungsten
- Region
- canada_yt
- Reported Region
- Yukon
- Ticker
- SIG
Test Work
- Processing Route
- rougher flotation
- Sample
- Rhosgobel rougher concentrate
Recovery
- Recovery
- 84.7 %
- Recovery Basis
- actual_test
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-05-14T00:00:00.000Z
Reasoning: Good initial tungsten recovery via flotation.
Evidence · text
“initial recovery of 84.7% tungsten in rougher concentrate using conventional floatation”
Tags used in scoring
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: processing_route matches the flotation signal
Byproduct Commodityneutral
The tested commodity is a byproduct rather than the primary economic driver.
Why it applies: the release describes a byproduct credit
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.