# Inventus Reports Up to 75% Gold Recovery from Heap Leach Testwork at Pardo Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo--8ab44976-945c-4e79-a9ae-45d5cff9abe5 Original source: https://www.globenewswire.com/news-release/2026/08/06/3340094/0/en/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo.html Publisher: globenewswire Original announcement: 2026-08-06T00:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Inventus Mining Corp - Ticker: IVS - Exchange: Unavailable - Region: Ontario - Primary commodity: Gold - Secondary commodities: None reported - Document categories: Metallurgy - Extracted: 2026-08-20 18:45:42 UTC Narrative sentiment: 0.40 · Bullish ## Minestarters Atlas summary Inventus Mining Corp reported gold recovery results from heap leach column testing at the Pardo Project in Ontario, with recoveries reaching 74.5% after 78 days for the -1/4 inch crush size. The results support a conceptual processing strategy involving ore sorting to separate high-grade material for milling from lower-grade material for heap leaching. Reasoning: Positive heap leach testwork showing up to 75% recovery, though the company notes this specific high-grade composite might not be the optimal route for all material, suggesting an integrated ore-sorting/mill/heap-leach strategy. - Positive factor: favourable reagent profile - Positive factor: front-loaded recovery - Negative factor: higher-grade composite may not be ideal for heap leach Facts used in scoring: 9 ## Classification and evidence **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: The testwork specifically evaluated column leach recoveries for a potential heap leach processing strategy. Evidence · text > positive metallurgical heap leach test results **Bench Scale Only** Polarity: negative Definition: Only preliminary bench tests completed — no locked-cycle or pilot work. Why it applies: The results are from laboratory-scale column leach tests using 59 to 65 kg of material. Evidence · text > Three columns containing approximately 59 to 65 kg of material were prepared **QA/QC Disclosed** Polarity: positive Story-specific tag Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: The release mentions the use of multiple large-mass Photon assays to reduce sampling uncertainty. Evidence · text > Multiple large-mass Photon assays were used to reduce sampling uncertainty **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: Wesley Whymark, P.Geo., CEO and Director, is named as the Qualified Person responsible for the technical content. Evidence · text > The Qualified Person responsible for the technical content of this news release is Wesley Whymark, P.Geo. ## Extracted facts Stored fact records: 9. Some facts used in scoring do not have a stored record. ## Metallurgical Results (9) ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo--8ab44976-945c-4e79-a9ae-45d5cff9abe5#fact-metallurgical-facts-0) gold #### Identity - Commodity: gold - Ticker: IVS #### Test Work - Program Status: preliminary - Test Type: column leach - Processing Route: heap leach - Sample: Column A -1/4 inch crush size - Leach Time: 648 hours #### Recovery - Recovery: 64.3 % - Recovery Basis: actual\_test - Head Grade: 2.694 - Head Grade Unit: g/t #### Reagents - Cyanide: 1.14 kg/t - Lime: 0 kg/t #### Lab - Laboratory: Process Mineralogical Consulting Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-06T00:00:00.000Z Reasoning: Strong recovery profile for a heap leach route with low reagent consumption. - Positive factor: low cyanide consumption - Positive factor: front-loaded recovery Evidence · table > 64.3% Context: 2.694 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo--8ab44976-945c-4e79-a9ae-45d5cff9abe5#fact-metallurgical-facts-1) gold #### Identity - Commodity: gold - Ticker: IVS #### Test Work - Program Status: preliminary - Test Type: column leach - Processing Route: heap leach - Sample: Column A -1/4 inch crush size - Leach Time: 1152 hours #### Recovery - Recovery: 72 % - Recovery Basis: actual\_test - Head Grade: 2.694 - Head Grade Unit: g/t #### Reagents - Cyanide: 1.14 kg/t - Lime: 0 kg/t #### Lab - Laboratory: Process Mineralogical Consulting Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-06T00:00:00.000Z Reasoning: Significant recovery achieved within 48 days. - Positive factor: front-loaded recovery Evidence · table > 72.0% Context: 2.694 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo--8ab44976-945c-4e79-a9ae-45d5cff9abe5#fact-metallurgical-facts-2) gold #### Identity - Commodity: gold - Ticker: IVS #### Test Work - Program Status: preliminary - Test Type: column leach - Processing Route: heap leach - Sample: Column A -1/4 inch crush size - Leach Time: 1872 hours #### Recovery - Recovery: 74.5 % - Recovery Basis: actual\_test - Head Grade: 2.694 - Head Grade Unit: g/t #### Reagents - Cyanide: 1.14 kg/t - Lime: 0 kg/t #### Lab - Laboratory: Process Mineralogical Consulting Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-06T00:00:00.000Z Reasoning: Highest recovery achieved in the test series. Evidence · table > 74.5% Context: 2.694 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo--8ab44976-945c-4e79-a9ae-45d5cff9abe5#fact-metallurgical-facts-3) gold #### Identity - Commodity: gold - Ticker: IVS #### Test Work - Program Status: preliminary - Test Type: column leach - Processing Route: heap leach - Sample: Column B -3/8 inch crush size - Leach Time: 648 hours #### Recovery - Recovery: 53.1 % - Recovery Basis: actual\_test - Head Grade: 1.514 - Head Grade Unit: g/t #### Lab - Laboratory: Process Mineralogical Consulting Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-06T00:00:00.000Z Reasoning: Lower recovery compared to the -1/4 inch column. - Negative factor: lower recovery Evidence · table > 53.1% Context: 1.514 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo--8ab44976-945c-4e79-a9ae-45d5cff9abe5#fact-metallurgical-facts-4) gold #### Identity - Commodity: gold - Ticker: IVS #### Test Work - Program Status: preliminary - Test Type: column leach - Processing Route: heap leach - Sample: Column B -3/8 inch crush size - Leach Time: 1152 hours #### Recovery - Recovery: 60 % - Recovery Basis: actual\_test - Head Grade: 1.514 - Head Grade Unit: g/t #### Lab - Laboratory: Process Mineralogical Consulting Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-06T00:00:00.000Z Reasoning: Moderate recovery. Evidence · table > 60.0% Context: 1.514 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo--8ab44976-945c-4e79-a9ae-45d5cff9abe5#fact-metallurgical-facts-5) gold #### Identity - Commodity: gold - Ticker: IVS #### Test Work - Program Status: preliminary - Test Type: column leach - Processing Route: heap leach - Sample: Column B -3/8 inch crush size - Leach Time: 1872 hours #### Recovery - Recovery: 66.9 % - Recovery Basis: actual\_test - Head Grade: 1.514 - Head Grade Unit: g/t #### Lab - Laboratory: Process Mineralogical Consulting Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-06T00:00:00.000Z Reasoning: Recovery improving over time. Evidence · table > 66.9% Context: 1.514 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo--8ab44976-945c-4e79-a9ae-45d5cff9abe5#fact-metallurgical-facts-6) gold #### Identity - Commodity: gold - Ticker: IVS #### Test Work - Program Status: preliminary - Test Type: column leach - Processing Route: heap leach - Sample: Column C -1/2 inch crush size - Leach Time: 648 hours #### Recovery - Recovery: 61.1 % - Recovery Basis: actual\_test - Head Grade: 1.91 - Head Grade Unit: g/t #### Lab - Laboratory: Process Mineralogical Consulting Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-06T00:00:00.000Z Reasoning: Moderate recovery. Evidence · table > 61.1% Context: 1.910 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo--8ab44976-945c-4e79-a9ae-45d5cff9abe5#fact-metallurgical-facts-7) gold #### Identity - Commodity: gold - Ticker: IVS #### Test Work - Program Status: preliminary - Test Type: column leach - Processing Route: heap leach - Sample: Column C -1/2 inch crush size - Leach Time: 1152 hours #### Recovery - Recovery: 65.1 % - Recovery Basis: actual\_test - Head Grade: 1.91 - Head Grade Unit: g/t #### Lab - Laboratory: Process Mineralogical Consulting Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-06T00:00:00.000Z Reasoning: Moderate recovery. Evidence · table > 65.1% Context: 1.910 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/inventus-reports-up-to-75-gold-recovery-from-heap-leach-testwork-at-pardo--8ab44976-945c-4e79-a9ae-45d5cff9abe5#fact-metallurgical-facts-8) gold #### Identity - Commodity: gold - Ticker: IVS #### Test Work - Program Status: preliminary - Test Type: column leach - Processing Route: heap leach - Sample: Column C -1/2 inch crush size - Leach Time: 1872 hours #### Recovery - Recovery: 69.5 % - Recovery Basis: actual\_test - Head Grade: 1.91 - Head Grade Unit: g/t #### Lab - Laboratory: Process Mineralogical Consulting Ltd. #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-08-06T00:00:00.000Z Reasoning: Recovery improving over time. Evidence · table > 69.5% Context: 1.910 ## 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.