# Liberty Gold Validates Predicted Operating Gold Leach Recoveries Through Bulk Column Tests at Run-of-Mine Sizing Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/liberty-gold-validates-predicted-operating-gold-leach-recoveries-through-bulk-co--df8a4228-0fc8-4975-8a5e-6a2ed74bde67 Original source: https://libertygold.ca/news/liberty-gold-validates-predicted-operating-gold-leach-recoveries-through-bulk-column-tests-at-run-of-mine-sizing/ Publisher: prospectors\_exchange Original announcement: 2026-09-17T00:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: 2026-09-18T12:49:32.907Z Atlas analysis updated: 2026-09-18T12:49:32.907Z - Company: Liberty Gold Corp. - Ticker: LGD - Exchange: Unavailable - Region: Idaho - Primary commodity: Gold - Secondary commodities: Silver - Document categories: Metallurgy - Extracted: 2026-09-18 12:49:33 UTC Narrative sentiment: 0.80 · Bullish ## Minestarters Atlas summary Liberty Gold has completed Phase 6 metallurgical bulk column testing at the Black Pine Oxide Gold Project, validating predicted gold leach recoveries for run-of-mine \(ROM\) sized material. The results show that gold extraction is relatively insensitive to particle size, supporting a low-cost heap leach operation without extensive crushing. Reasoning: Bulk column tests at ROM sizing successfully validated the gold recovery models used in the Feasibility Study, specifically demonstrating that coarse particle sizes achieve high extractions, which supports a low-cost heap leach strategy. - Positive factor: Validation of ROM heap leach recoveries - Positive factor: Rapid leach kinetics \(90% in 36 days\) - Positive factor: Low sensitivity to particle size \(reduces crushing costs\) - Positive factor: High extraction in Rangefront Ppos sample \(95%\) - Positive factor: Favorable permeability results - Negative factor: One sample underperformed due to high clay content Facts used in scoring: 4 ## Classification and evidence **High Recovery** Polarity: positive Definition: Recovery at or above the exceptional band for the commodity and processing route. Why it applies: Rangefront Ppos sample achieved 95% gold extraction. Evidence · text > The Rangefront Ppos sample had the highest extraction tested at 95% **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: The testing was conducted to validate a ROM heap leach processing route. Evidence · text > support a ROM heap leach processing route **QP/CP Signed** Polarity: positive Story-specific tag Definition: 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: The release was reviewed and approved by Richard Zaggle, a Qualified Person. Evidence · text > reviewed and approved by Richard Zaggle, RM-SME, Senior Director, Mining and Metallurgy of Liberty Gold Corp., a Qualified Person **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: the document describes a heap\_leach route \("heap leach"\) **Multi-Domain Tested** Polarity: positive Definition: Variability across ore domains \(oxide, transition, fresh\) has been addressed. Why it applies: 4 distinct composites were tested ## Extracted facts Stored fact records: 4. Some facts used in scoring do not have a stored record. ## Metallurgical Results (4) ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/liberty-gold-validates-predicted-operating-gold-leach-recoveries-through-bulk-co--df8a4228-0fc8-4975-8a5e-6a2ed74bde67#fact-metallurgical-facts-0) Black Pine · gold #### Identity - Project: Black Pine - Commodity: gold - Region: usa\_id - Reported Region: Idaho - Ticker: LGD #### Test Work - Program Status: detailed - Test Type: column leach - Processing Route: ROM heap leach - Sample: average weighted gold extraction for the bulk columns #### Recovery - Recovery: 72.4 % - Recovery Basis: actual\_test #### Lab - Laboratory: KCA #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-17T00:00:00.000Z Reasoning: Average weighted recovery of 72.4% matches previous modeling. - Positive factor: In line with modeled recoveries in the recent FS Evidence · text > The average weighted gold extraction for the bulk columns was 72.4%, which is in line with modeled recoveries in the recent FS. #### Tags used in scoring **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: processing\_route matches the heap\_leach signal ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/liberty-gold-validates-predicted-operating-gold-leach-recoveries-through-bulk-co--df8a4228-0fc8-4975-8a5e-6a2ed74bde67#fact-metallurgical-facts-1) Black Pine · gold #### Identity - Project: Black Pine - Commodity: gold - Region: usa\_id - Reported Region: Idaho - Ticker: LGD #### Test Work - Program Status: detailed - Test Type: column leach - Processing Route: ROM heap leach - Sample: Rangefront Ppos sample #### Recovery - Recovery: 95 % - Recovery Basis: actual\_test - Head Grade: 0.43 - Head Grade Unit: g/t #### Lab - Laboratory: KCA #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-17T00:00:00.000Z Reasoning: Exceptional recovery of 95% at a low head grade of 0.43 g/t Au. - Positive factor: Outperformed modeled gold recoveries by over 13% - Positive factor: High recovery for low grade material Evidence · text > The Rangefront Ppos sample had the highest extraction tested at 95% for a 0.43 g/t gold head grade. #### Tags used in scoring **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: processing\_route matches the heap\_leach signal **High Recovery** Polarity: positive Definition: Recovery at or above the exceptional band for the commodity and processing route. Why it applies: 95% is at or above the exceptional band \(75%\) ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/liberty-gold-validates-predicted-operating-gold-leach-recoveries-through-bulk-co--df8a4228-0fc8-4975-8a5e-6a2ed74bde67#fact-metallurgical-facts-2) Black Pine · gold #### Identity - Project: Black Pine - Commodity: gold - Region: usa\_id - Reported Region: Idaho - Ticker: LGD #### Test Work - Program Status: detailed - Test Type: column leach - Processing Route: ROM heap leach - Sample: I-pit Pold sample #### Recovery - Recovery: 51.9 % - Recovery Basis: actual\_test #### Lab - Laboratory: KCA #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-17T00:00:00.000Z Reasoning: Lower recovery of 51.9% was expected for this specific rock unit. - Positive factor: Aligned with modeled recoveries - Negative factor: Lower extraction compared to other samples Evidence · text > The I-pit Pold sample extraction at 51.9% was an expected result as this rock unit is known to have lower gold extraction #### Tags used in scoring **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: processing\_route matches the heap\_leach signal ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/liberty-gold-validates-predicted-operating-gold-leach-recoveries-through-bulk-co--df8a4228-0fc8-4975-8a5e-6a2ed74bde67#fact-metallurgical-facts-3) Black Pine · silver #### Identity - Project: Black Pine - Commodity: silver - Region: usa\_id - Reported Region: Idaho - Ticker: LGD #### Test Work - Program Status: detailed - Test Type: column leach - Processing Route: ROM heap leach - Sample: bulk column leach tests \(weighted average\) #### Recovery - Recovery: 21 % - Recovery Basis: actual\_test #### Lab - Laboratory: KCA #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-17T00:00:00.000Z Reasoning: Silver recovery of 21% is higher than previous averages and will be used for model updates. - Positive factor: Above previous variability composite averages Evidence · text > Silver Bulk column leach tests recorded silver \(“Ag”\) extractions up to 39%, with a weighted average Ag recovery of 21%. #### Tags used in scoring **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: processing\_route matches the heap\_leach signal **Low Recovery** Polarity: negative Definition: Recovery below the weak band for the commodity and processing route. Why it applies: 21% is below the weak band \(75%\) ## 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.