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IAMGOLD Announces Consolidated Mineral Resource Estimate for Cote Gold

IAMGOLD's Cote Resource Expansion Validates Drilling Spend, But Royalty Creep at Essakane Threatens Margin Expansion in a $2,500/oz World

By The Northwire Desk — AI Analysis Jun 01, 2026 · 07:01 IMG · 24.94 IAMGold Corporation

Executive Summary

IAMGOLD Corporation released an updated consolidated Mineral Resource Estimate for its Côté Gold mine in Ontario, effective March 31, 2026.
The update integrates the Côté and Gosselin zones into a single geological framework, marking a technical milestone ahead of the planned Q4 2026 expansion study.
Consolidated Measured and Indicated (M&I) resources increased 12% to 20.34 million ounces of gold (838.0 Mt at 0.75 g/t Au).
Inferred resources surged 61% to 3.48 million ounces of gold (177.1 Mt at 0.61 g/t Au).
The company raised its gold price assumption to $2,500/oz and lowered the consolidated cut-off grade to 0.25 g/t Au from 0.30 g/t Au.
Integration of 64 additional drill holes (39 in Côté, 25 in Gosselin) improved confidence in the saddle area and converted inferred to indicated ounces.
A 30,000-meter diamond drilling program is planned for 2026 to infill resources and test envelope expansion.
The updated resource base will feed the Côté Gold Technical Report and mine plan expected in Q4 2026, targeting a plant expansion and larger-scale mining scenario.

Material Impact

The resource update is a direct, expected follow-up to the aggressive 2025 drilling campaign and the company's stated guidance to deliver an expansion study in Q4 2026.
The 12% increase in M&I and 61% jump in Inferred resources confirm the geological continuity and growth trajectory previously outlined by management.
The lowering of the cut-off grade to 0.25 g/t Au and the $2,500/oz price assumption are standard economic parameters that optimize the resource model but do not represent a fundamental shift in the project's economics.
The market has already priced in the Côté expansion narrative through the Q4 2026 catalyst timeline. This announcement serves as validation rather than a surprise.
No new strategic partnerships, financing events, or operational breakthroughs are disclosed. The impact is incremental and aligns with previous expectations.

IMG · Price

Company Overview

IAMGOLD is a mid-tier gold producer operating three primary assets: Côté Gold (Ontario, Canada), Westwood (Ontario, Canada), and Essakane (Burkina Faso).
Flagship Project: Côté Gold is a high-grade, underground mine that achieved nameplate throughput of 36,000 tpd in mid-2025. It is the primary driver of production growth and cash flow.
Strategic Expansion: The company recently consolidated the Nelligan Mining Complex in Quebec through the acquisitions of Northern Superior Resources and Mines D'Or Orbec, adding ~134,000 hectares and significant pre-production resources.
Production Guidance: 720,000–820,000 attributable ounces for 2026, with Côté targeting 270,000–310,000 oz.
Cost Profile: 2026 cash cost guidance (ex-royalties) is $1,100–$1,250/oz, with AISC guidance of $2,000–$2,150/oz.

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