# Fortuna Expands Mineral Reserves and Resources at Séguéla Mine, Côte d’Ivoire Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/fortuna-expands-mineral-reserves-and-resources-at-se-gue-la-mine-co-te-d-ivoire--b378296b-3684-4ddb-996a-c6e8bb874d76 Original source: https://www.theassay.com/news/fortuna-expands-mineral-reserves-and-resources-at-seguela-mine-cote-divoire/ Publisher: assay Original announcement: 2025-11-19T06:44:27.000Z Analysis by Minestarters Atlas Atlas analysis published: 2026-09-30T16:53:56.594Z Atlas analysis updated: 2026-09-30T16:53:56.594Z - Company: Fortuna Mining Corp. - Ticker: FSM - Exchange: Unavailable - Region: Côte d’Ivoire - Primary commodity: Gold - Secondary commodities: None reported - Document categories: Resource update - Extracted: 2026-09-30 16:53:57 UTC Narrative sentiment: 0.60 · Bullish ## Minestarters Atlas summary Fortuna Mining Corp. has announced a significant expansion of the Séguéla Mine resource and reserve inventory in Côte d’Ivoire. The update features a 33% increase in reserve tonnage to 13.0 Mt at 2.81 g/t Au and a 100% increase in Indicated Resources. Reasoning: The update represents a major expansion of the project's scale, with significant growth in both reserves and indicated resources, despite a grade dilution effect from new deposit inclusions. - Positive factor: Significant tonnage growth in reserves \(+33%\) - Positive factor: Substantial resource expansion in Indicated category \(+100%\) - Positive factor: Largest resource inventory in project history - Positive factor: Clear pathway to life-of-mine extension - Negative factor: Reserve grade decline \(-17%\) due to inclusion of lower-grade Kingfisher deposit Facts used in scoring: 3 ## Classification and evidence **Tonnage Growth** Polarity: positive Definition: Significant tonnage increase \(≥15%\) vs prior estimate with grade maintained or improved. Why it applies: Reserve tonnage increased by 33% compared to December 2024. Evidence · text > Reserve tonnes up 33% **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: Reserve grade decreased by 17% due to the inclusion of the lower-grade Kingfisher deposit. Evidence · text > grade down 17% due to inclusion of Kingfisher **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: The document provides a significant update to the Mineral Reserves and Resources at the Séguéla Mine. Evidence · text > announced a significant update to Mineral Reserves and Resources ## Extracted facts Stored fact records: 3. Some facts used in scoring do not have a stored record. ## Resource Estimates (3) ### probable [Link to this fact](https://atlas-staging.minestarters.com/news/fortuna-expands-mineral-reserves-and-resources-at-se-gue-la-mine-co-te-d-ivoire--b378296b-3684-4ddb-996a-c6e8bb874d76#fact-resource-facts-0) Séguéla Mine · gold #### Identity - Project: Séguéla Mine - Commodity: gold - Region: côte d’ivoire - Reported Region: Côte d’Ivoire - Ticker: FSM #### Resource scope - Estimate type: reserve - Resource group id: resource:96da43e2b138bb62c1c6 - Mining method: combined #### Resource Data - Category: probable - Tonnes: 13000000 - Grade: 2.81 - Grade Unit: g/t - Contained Metal: 1.2 - Contained Unit: moz #### Prior Estimate - Resource Date: 2025-10-31 - Prior Tonnes: 9774436 - Prior Grade: 3.38 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-11-19T00:00:00.000Z Reasoning: Reserves grew significantly in volume due to the inclusion of the Kingfisher deposit, though this resulted in a lower average grade. - Positive factor: 33% increase in reserve tonnage - Negative factor: 17% grade decline Evidence · text > 13.0Mt @ 2.81 g/t Au for 1.2Moz gold Reserve tonnes up 33%, grade down 17% #### Tags used in scoring **Probable Reserve** Polarity: positive Definition: Indicated Resource with demonstrated economic viability after applying modifying factors. Why it applies: category is "probable" **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated **Tonnage Growth** Polarity: positive Definition: Significant tonnage increase \(≥15%\) vs prior estimate with grade maintained or improved. Why it applies: 13000000 against 9774436 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: 2.81 against 3.38 previously **No QP/CP Disclosure** Polarity: negative Definition: No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience. Why it applies: no Qualified or Competent Person is named anywhere in the release ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/fortuna-expands-mineral-reserves-and-resources-at-se-gue-la-mine-co-te-d-ivoire--b378296b-3684-4ddb-996a-c6e8bb874d76#fact-resource-facts-1) gold #### Identity - Commodity: gold - Region: côte d’ivoire - Reported Region: Côte d’Ivoire - Ticker: FSM #### Resource scope - Estimate type: resource - Resource group id: resource:b141514e5fdde044c4af - Mining method: combined #### Resource Data - Category: indicated - Contained Metal: 794 - Contained Unit: koz #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-11-19T00:00:00.000Z Reasoning: Massive expansion of the indicated resource category, doubling the previous inventory. - Positive factor: 100% increase in Indicated resource inventory Evidence · text > Indicated Resources \(exclusive of reserves\): 794koz gold \(+100%\) #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated **No QP/CP Disclosure** Polarity: negative Definition: No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience. Why it applies: no Qualified or Competent Person is named anywhere in the release ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/fortuna-expands-mineral-reserves-and-resources-at-se-gue-la-mine-co-te-d-ivoire--b378296b-3684-4ddb-996a-c6e8bb874d76#fact-resource-facts-2) gold #### Identity - Commodity: gold - Region: côte d’ivoire - Reported Region: Côte d’Ivoire - Ticker: FSM #### Resource scope - Estimate type: resource - Resource group id: resource:b0a4545e71e53c9d78c2 - Mining method: combined #### Resource Data - Category: inferred - Contained Metal: 712 - Contained Unit: koz #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-11-19T00:00:00.000Z Reasoning: Modest growth in the speculative resource category. - Positive factor: 15% increase in Inferred resource inventory Evidence · text > Inferred Resources: 712koz gold \(+15%\) #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated **No QP/CP Disclosure** Polarity: negative Definition: No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience. Why it applies: no Qualified or Competent Person is named anywhere in the release ## 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.