Sitka Reports 94.3% Gold Recovery and 84.7% Tungsten Recovery from Metallurgical Testing at the Rhosgobel Deposit at Its Rc Gold Project, Yukon
Original announcement by tmx on
- Company
- Sitka Gold Corp.
- Ticker
- SIG
- Exchange
- TSX
- Region
- Yukon
- Primary commodity
- Gold
- Secondary commodities
- Tungsten
- Document categories
- Metallurgy
- Extracted
- 2026-09-16 22:48:42 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Sitka Gold Corp. has reported positive initial metallurgical testwork results from its Rhosgobel deposit at the RC Gold Project in Yukon. Testing achieved an average gold recovery of 94.3% via conventional CIL/CIP leaching and a tungsten recovery of 84.7% via flotation, suggesting tungsten is a viable byproduct.
Reasoning: Initial metallurgical testing at Rhosgobel shows robust recoveries for both the primary gold and the tungsten byproduct, supporting the economic potential of the deposit.
Positive factors
- High gold recovery (94.3%)
- Strong tungsten recovery (84.7%)
- Non-refractory gold mineralization confirmed
- Rapid leach kinetics observed
- Tungsten identified as a valuable byproduct
Facts used in scoring: 2
Classification and evidence
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/strong band for CIL/CIP milling routes.
Evidence · text
“Gold recovery averaging 94.3% from Rhosgobel deposit utilizing conventional whole ore cyanidation leaching”
Free Millingpositive
Simple, clean ore amenable to standard processing without oxidation.
Why it applies: Gold mineralization is explicitly described as non-refractory.
Evidence · text
“These results demonstrate that the gold mineralization at Rhosgobel is not refractory”
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Evidence · text
“represents Carbon in Leach ("CIL")/Carbon in Pulp ("CIP") processes, the most commonly used milling gold recovery method.”
QA/QC Disclosedpositive · Story-specific tag
Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).
Why it applies: Release details laboratory (ALS), accreditation (ISO 17025), and specific assay methods.
Evidence · text
“ALS is accredited to ISO 17025:2005 UKAS ref. 4028”
Gravity Routeneutral
Gravity separation forms a material part of the flowsheet.
Why it applies: the document describes a gravity route ("gravity")
Multi-Domain Testedpositive
Variability across ore domains (oxide, transition, fresh) has been addressed.
Why it applies: 2 distinct composites were tested
Extracted facts
Stored fact records: 2. Some facts used in scoring do not have a stored record.
Metallurgical Results (2)
bottle rollRC 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
- Program Status
- preliminary
- Test Type
- bottle roll
- Processing Route
- conventional whole ore cyanidation leaching (CIL/CIP)
- Sample
- 6 separate test composites from 2025 Rhosgobel drill core
- Grind P80
- 75 µm
- Leach Time
- 48 hours
Recovery
- Recovery
- 94.3 %
- Recovery Basis
- actual_test
Lab
- Laboratory
- Blue Coast Research Ltd.
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-05-04T00:00:00.000Z
Reasoning: 94.3% recovery is very strong for a CIL/CIP mill route.
Positive factors
- High average recovery
- Rapid leach kinetics
Evidence · text
“Gold recovery averaging 94.3% from Rhosgobel deposit utilizing conventional whole ore cyanidation leaching at a grind size of 75 microns”
Tags used in scoring
Mill Routeneutral
Processing via mill or concentrator (CIL, CIP, tank leach, flotation).
Why it applies: processing_route matches the mill_cil signal
Byproduct Commodityneutral
The tested commodity is a byproduct rather than the primary economic driver.
Why it applies: the release describes a byproduct credit
flotationRC 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
- Program Status
- preliminary
- Test Type
- flotation
- Processing Route
- rougher flotation
- Sample
- single master composite from 3 separate core sample intervals from 2025 drilling
- Grind P80
- 191 µm
Recovery
- Recovery
- 84.7 %
- Recovery Basis
- actual_test
- Mass Pull
- 1 %
Lab
- Laboratory
- Blue Coast Research Ltd.
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-05-04T00:00:00.000Z
Reasoning: 84.7% recovery in a flotation concentrate is a strong result for tungsten byproduct potential.
Positive factors
- High recovery for a byproduct
- Low mass pull
Evidence · text
“tungsten recovery of 84.7% in rougher concentrate using conventional flotation with a very low mass pull of less than 1%”
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.