# IAMGOLD Announces Consolidated Mineral Resource Estimate for C&\#xF4;t&\#xE9; Gold Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/iamgold-announces-consolidated-mineral-resource-estimate-for-c-xf4-t-xe9-gold--6c1b2e2c-246c-45fa-bd60-7278d199db4b Original source: https://money.tmx.com/en/quote/IMG/news/7994903023586412/iamgold-announces-consolidated-mineral-resource-estimate-for-c-xf4-t-xe9-gold Publisher: tmx Original announcement: 2026-06-01T11:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: IAMGOLD Corporation - Ticker: IMG - Exchange: TSX - Region: Ontario, Canada - Primary commodity: Gold - Secondary commodities: None reported - Document categories: Resource update - Extracted: 2026-08-20 22:15:39 UTC Narrative sentiment: 0.10 · Bullish ## Minestarters Atlas summary IAMGOLD announced an updated Mineral Resource estimate for its Côté Gold Mine in Ontario, Canada, effective March 31, 2026. The consolidated estimate reports 20.3 million ounces of gold in the Measured and Indicated categories, a 12% increase, and 3.5 million ounces in the Inferred category, a 61% increase. This update integrates the Côté and Gosselin zones into a single model, using a higher gold price assumption and a lower cut-off grade, and will inform an upcoming expansion study and mine plan. Reasoning: IAMGOLD announced a significant update to its Côté Gold Mine's Mineral Resource estimate, consolidating the Côté and Gosselin zones and reporting substantial increases in contained gold ounces in both Measured & Indicated \(12%\) and Inferred \(61%\) categories. While this growth is positive and forms the basis for future expansion plans, it was partly driven by a higher gold price assumption and a lower cut-off grade, leading to a decline in average resource grade. - Positive factor: Significant contained metal growth \(12% M&I, 61% Inferred\). - Positive factor: Consolidation of Côté and Gosselin zones into a single model, enabling integrated mine planning. - Positive factor: Addition of new resources in the saddle area. - Positive factor: NI 43-101 compliant and QP signed. - Positive factor: Exceptional contained metal scale \(20.34 Moz M&I\). - Negative factor: Lowered cut-off grade \(0.25 g/t Au from 0.30 g/t Au\) contributes to tonnage/ounce increase. - Negative factor: Increased gold price assumption \(US$2,500/oz from US$2,100/oz for Côté\) contributes to tonnage/ounce increase. - Negative factor: Grade decline in both M&I \(-8.5%\) and Inferred \(-9%\) categories. - Negative factor: Weak M&I confidence \(19.6% Measured of M&I\). - Negative factor: Overall M&I proportion of total resource decreased. - Negative factor: M&I grade is weak for open pit \(0.75 g/t Au\). Low confidence — this extraction should be reviewed alongside the original source. Facts used in scoring: 6 ## Classification and evidence **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: The document reports 164.4 Mt at 0.89 g/t Au in the Measured category. Evidence · table > 164.4 Context: Measured **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: The document reports 673.6 Mt at 0.72 g/t Au in the Indicated category. Evidence · table > 673.6 Context: Indicated **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: The document reports 177.1 Mt at 0.61 g/t Au in the Inferred category. Evidence · table > 177.1 Context: Inferred **Tonnage Growth** Polarity: positive Definition: Significant tonnage increase \(≥15%\) vs prior estimate with grade maintained or improved. Why it applies: Total M&I tonnage increased by 22% from 689.5 Mt to 838.0 Mt, and Inferred tonnage increased by 76% from 100.6 Mt to 177.1 Mt. Evidence · table > 22% Context: Total M&I **Contained Metal Growth** Polarity: positive Definition: True scale improvement — contained metal ounces/tonnes increased vs prior, accounting for both tonnage and grade changes. Why it applies: Total M&I contained ounces increased by 12% from 18.16 Moz to 20.34 Moz, and Inferred contained ounces increased by 61% from 2.17 Moz to 3.48 Moz. Evidence · table > 12% Context: Total M&I **QP/CP Signed** Polarity: positive 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 news release states that Denis Decharte, P.Eng., and Christine Beausoleil, P.Geo., are Qualified Persons \(QP\) for the estimate. Evidence · text > Denis Decharte, P.Eng., Consultant Resource Geologist, SLR Consulting \(Canada\) Ltd., is the independent Qualified Person \(QP\) **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: The document explicitly states a cut-off grade of 0.25 g/t Au for the updated estimate. Evidence · text > a consolidated Mineral Resource cut-off grade of 0.25 g/t Au **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: The estimate was prepared in accordance with National Instrument 43-101. Evidence · text > prepared in accordance with National Instrument 43-101 - Standards of Disclosure for Mineral Projects **Cut-off Lowered** Polarity: negative Definition: Cut-off grade significantly reduced vs prior estimate — tonnage growth may be artificial inflation. Why it applies: The cut-off grade was lowered from 0.30 g/t Au previously to 0.25 g/t Au for the updated estimate. Evidence · text > a consolidated Mineral Resource cut-off grade of 0.25 g/t Au \(down from 0.30 g/t Au previously\) **Grade Decline** Polarity: negative Definition: Average grade dropped >5% vs prior estimate — deposit economics worsening. May indicate high-grading in early drilling. Why it applies: The total M&I grade declined by 8% from 0.83 g/t to 0.77 g/t, and Inferred grade declined by 9% from 0.67 g/t to 0.61 g/t. Evidence · table > -8% Context: Total M&I **Dilutive Growth** Polarity: negative Definition: Tonnage increased but contained metal flat or down — likely from lower cut-off grade, not geological expansion. Why it applies: Tonnage increased by 22% and contained metal by 12% in M&I categories, but average grade declined by 8% and the cut-off grade was lowered from 0.30 g/t Au to 0.25 g/t Au, indicating that the growth is partly due to including lower-grade material. Evidence · table > 22% Context: Total M&I **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: The document announces an 'updated Mineral Resource estimate' for the Côté Gold Mine. Evidence · text > updated Mineral Resource estimate for the Côté Gold Mine **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: The updated estimate 'will inform the upcoming Côté Gold Technical Report and mine plan', which is expected to evaluate a plant expansion and larger-scale mining scenario. Evidence · text > The updated Mineral Resource estimate will inform the upcoming Côté Gold Technical Report and mine plan **Category Upgrade** Polarity: positive Definition: Resource confidence improved — Inferred upgraded to Indicated, or Indicated to Measured. De-risking signal. Why it applies: Drilling in Gosselin was 'mainly focused on the continued conversion of resources from inferred to indicated'. Evidence · text > mainly focused on the continued conversion of resources from inferred to indicated ## Extracted facts Stored fact records: 6. Some facts used in scoring do not have a stored record. ## Resource Estimates (6) ### measured [Link to this fact](https://atlas-staging.minestarters.com/news/iamgold-announces-consolidated-mineral-resource-estimate-for-c-xf4-t-xe9-gold--6c1b2e2c-246c-45fa-bd60-7278d199db4b#fact-resource-facts-0) Côté Gold Mine · gold #### Identity - Project: Côté Gold Mine - Commodity: gold - Region: canada\_on - Reported Region: Ontario, Canada - Ticker: IMG #### Resource Data - Category: measured - Tonnes: 164400000 - Grade: 0.89 - Grade Unit: g/t - Contained Metal: 4.71 - Contained Unit: Moz - Cutoff Grade: 0.25 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-01T00:00:00.000Z Reasoning: The Measured resource category shows a high level of confidence and contributes significantly to the overall resource, despite a slight decline in grade compared to the previous estimate. - Positive factor: High confidence category \(Measured\). - Positive factor: Forms part of a significant resource base. - Negative factor: Grade declined compared to prior estimate. Evidence · table > 0.89 Context: 164.4 ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/iamgold-announces-consolidated-mineral-resource-estimate-for-c-xf4-t-xe9-gold--6c1b2e2c-246c-45fa-bd60-7278d199db4b#fact-resource-facts-1) Côté Gold Mine · gold #### Identity - Project: Côté Gold Mine - Commodity: gold - Region: canada\_on - Reported Region: Ontario, Canada - Ticker: IMG #### Resource Data - Category: indicated - Tonnes: 673600000 - Grade: 0.72 - Grade Unit: g/t - Contained Metal: 15.63 - Contained Unit: Moz - Cutoff Grade: 0.25 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-01T00:00:00.000Z Reasoning: The Indicated resource category represents a substantial portion of the overall resource with good confidence, though its grade has decreased from the previous estimate. - Positive factor: Good confidence category \(Indicated\). - Positive factor: Significant contribution to the resource base. - Negative factor: Grade declined compared to prior estimate. Evidence · table > 0.72 Context: 673.6 ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/iamgold-announces-consolidated-mineral-resource-estimate-for-c-xf4-t-xe9-gold--6c1b2e2c-246c-45fa-bd60-7278d199db4b#fact-resource-facts-2) Côté Gold Mine · gold #### Identity - Project: Côté Gold Mine - Commodity: gold - Region: canada\_on - Reported Region: Ontario, Canada - Ticker: IMG #### Resource Data - Category: inferred - Tonnes: 177100000 - Grade: 0.61 - Grade Unit: g/t - Contained Metal: 3.48 - Contained Unit: Moz - Cutoff Grade: 0.25 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-01T00:00:00.000Z Reasoning: The Inferred resource shows substantial growth in contained ounces, indicating future potential, but it is a lower confidence category with a declining grade. - Positive factor: Significant growth in contained ounces \(61%\). - Negative factor: Lower confidence category \(Inferred\). - Negative factor: Grade declined compared to prior estimate. Evidence · table > 0.61 Context: 177.1 ### measured [Link to this fact](https://atlas-staging.minestarters.com/news/iamgold-announces-consolidated-mineral-resource-estimate-for-c-xf4-t-xe9-gold--6c1b2e2c-246c-45fa-bd60-7278d199db4b#fact-resource-facts-3) Côté Gold Mine · gold Historical result Needs review: historical\_restatement #### Identity - Project: Côté Gold Mine - Commodity: gold - Region: canada\_on - Reported Region: Ontario, Canada - Ticker: IMG #### Resource Data - Category: measured - Tonnes: 153900000 - Grade: 0.93 - Grade Unit: g/t - Contained Metal: 4.6 - Contained Unit: Moz - Cutoff Grade: 0.3 #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes - Historical Source Date: 2026-02-17T00:00:00.000Z #### Dates - Event date: 2026-06-01T00:00:00.000Z Reasoning: This is a historical resource estimate provided for comparison with the updated estimate. Evidence · table > 0.93 Context: 153.9 ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/iamgold-announces-consolidated-mineral-resource-estimate-for-c-xf4-t-xe9-gold--6c1b2e2c-246c-45fa-bd60-7278d199db4b#fact-resource-facts-4) Côté Gold Mine · gold Historical result Needs review: historical\_restatement #### Identity - Project: Côté Gold Mine - Commodity: gold - Region: canada\_on - Reported Region: Ontario, Canada - Ticker: IMG #### Resource Data - Category: indicated - Tonnes: 535600000 - Grade: 0.79 - Grade Unit: g/t - Contained Metal: 13.56 - Contained Unit: Moz - Cutoff Grade: 0.3 #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes - Historical Source Date: 2026-02-17T00:00:00.000Z #### Dates - Event date: 2026-06-01T00:00:00.000Z Reasoning: This is a historical resource estimate provided for comparison with the updated estimate. Evidence · table > 0.77 Context: 268.8 ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/iamgold-announces-consolidated-mineral-resource-estimate-for-c-xf4-t-xe9-gold--6c1b2e2c-246c-45fa-bd60-7278d199db4b#fact-resource-facts-5) Côté Gold Mine · gold Historical result Needs review: historical\_restatement #### Identity - Project: Côté Gold Mine - Commodity: gold - Region: canada\_on - Reported Region: Ontario, Canada - Ticker: IMG #### Resource Data - Category: inferred - Tonnes: 100600000 - Grade: 0.67 - Grade Unit: g/t - Contained Metal: 2.17 - Contained Unit: Moz - Cutoff Grade: 0.3 #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes - Historical Source Date: 2026-02-17T00:00:00.000Z #### Dates - Event date: 2026-06-01T00:00:00.000Z Reasoning: This is a historical resource estimate provided for comparison with the updated estimate. Evidence · table > 0.60 Context: 62.8 ## 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.