Sayona Mining's Moblan Lithium Project Resource Jumps

TL;DR

Sayona Mining's Moblan lithium project just got way bigger: 121Mt resource, 48Mt reserve!

AI Summary

Sayona Mining Limited announced updated JORC Mineral Resource and Ore Reserve Estimates for its Moblan Lithium Project on August 26, 2025. The total Mineral Resource has increased to 121 million tonnes (Mt), and the Ore Reserve has grown to 48 Mt, highlighting the project's strategic importance for Sayona, which holds a 60% stake.

Why It Matters

The significant increase in both mineral resources and ore reserves at the Moblan Lithium Project indicates a larger, more valuable deposit, potentially boosting Sayona Mining's future production capacity and market position in the growing lithium sector.

Risk Assessment

Risk Level: medium — The filing details resource and reserve estimates, which are inherently subject to geological and economic uncertainties, and the company's financial health and operational execution remain key factors.

Key Numbers

• 121Mt — Total Mineral Resource (Represents a significant increase in the estimated quantity of lithium-bearing material at Moblan.)
• 48Mt — Ore Reserve (Indicates a larger, economically viable portion of the resource available for extraction.)

Key Players & Entities

• Sayona Mining Limited (company) — Registrant and operator of the Moblan Lithium Project
• Moblan Lithium Project (company) — Project with updated resource and reserve estimates
• Investissement Quebec (company) — Partner in the Moblan Lithium Project with a 40% stake
• 121Mt (dollar_amount) — Updated total Mineral Resource estimate
• 48Mt (dollar_amount) — Updated Ore Reserve estimate
• August 26, 2025 (date) — Date of the announcement

FAQ

Key Financial Figures

• $1,550 — atement (0.55 % Li 2 O cut-off grade, US$1,550/t SC6) Classification Measured Indic

Filing Documents

• ef20054447_6k.htm (6-K) — 589KB
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• 0001140361-25-032564.txt ( ) — 6264KB

From the Filing

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2025 Commission File Number 333-286715 SAYONA MINING LIMITED (Translation of registrant's name into English) Level 28, 10 Eagle Street Brisbane, Queensland 4000 Australia (Address of principal executive office) Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F. Form 20-F Form 40-F Moblan Increases Resource to 121Mt and Reserve to 48Mt North American lithium producer Sayona Mining Limited ("Sayona") (ASX:SYA; OTCQB:SYAXF) announced today results from the updated JORC Mineral Resource and Ore Reserve Estimates at its Moblan Lithium Project (Sayona 60%; Investissement Quebec 40%), demonstrating the potential of this highly strategic asset. Highlights Total Mineral Resource Estimate increased to 121Mt at 1.19% Li 2 O. This is an increase in Mineral Resources of 30% compared to the previous estimate released on 27 August, 2024 and an increase of more than 650% 1 since Sayona acquired Moblan 2 in September 2021. Total Ore Reserves increased to 48.08 Mt at 1.31% Li 2 O. This is an increase in Ore Reserves of 39% compared to the previous estimate released on 20 February, 2024 and more than 350% 1 increase since Sayona acquired Moblan 2 in September 2021. The estimate is based on updated geological models, revised economic parameters and an optimised mine plan. Mineral Resource and Ore Reserves reported are in compliance with the JORC Code (2012 Edition). 2025 JORC Mineral Resource Estimate Resource Classification Tonnes (Mt) Li 2 O Grade (%) Cut-off Grade (%) Measured 6.3 1.50 0.55 Indicated 101.4 1.19 0.55 Inferred 13.3 1.06 0.55 Total 121.0 1.19 0.55 2025 JORC Ore Reserves Estimate Reserve Category Tonnes (Mt) Li 2 O Grade (%) Cut-off Grade (%) Fe 2 O 3 Grade (%) Proved Ore Reserves 5.33 1.57 0.60 0.95% Probable Ore Reserves 42.75 1.27 0.60 1.10% Total 48.08 1.31 0.60 1.09% 1 The Mineral Resources and Ore Reserves referenced are foreign estimates and are not reported in accordance with the JORC Code. A competent person has not done sufficient work to classify the foreign estimates as Mineral Resources or Ore Reserves in accordance with the JORC Code. It is uncertain that following evaluation and/or further exploration work that the foreign estimates will be able to be reported as Mineral Resources or Ore Reserves in accordance with the JORC Code. 2 See ASX release dated 30 September 2021. Level 28, 10 Eagle St Brisbane Q 4000 | +61 7 3369 7058 info@sayonamining.com.au | ASX: SYA | ACN 091 951 978 sayonamining.com.au Mineral Resource Estimate (MRE) and Ore Reserves Estimate Details Sayona has significantly expanded its Canadian lithium resource base with this updated JORC Mineral Resource estimate for its Moblan Lithium Project. Results from the updated MRE reinforce the project's status as the centrepiece of Sayona's Eeyou-Istchee James Bay hub in northern Quebec. Sayona now has a total estimated JORC Measured, Indicated and Inferred Mineral Resource of 121 million tonnes at 1.19% Li 2 O at a cut-off grade of 0.55% Li 2 O (Table 1), this is an increase of 30% over the previous MRE (27 August 2024) of 93.1 million tonnes (Mt) at 1.21% Li 2 O. Approximately 89% of the total tonnage is in the higher confidence Measured and Indicated categories. The mineral resources are constrained by the claim limits and within a resource level conceptual pit shell. The exceptional increase in mineral resources at Moblan reflects the addition and integration of all the drilling results from the 2024 program (addition of 261 drillholes for 74,953 m) (Figure 1). Sayona's Managing Director and CEO, Lucas Dow, commented: "The further expansion of our Moblan Lithium Project's resource base is a testament to Sayona's commitment to unlocking the full potential of our assets in the Eeyou-Istchee James Bay region. Work by the Sayona technical team has seen a more than sixfold increase in the resource from when the project was purchased in 2021, to a total resource today of 121 million tonnes at 1.19% Li 2 O. "Moblan remains one of the largest and best located development stage lithium projects in Quebec with access to hydropower, immediately adjacent to an all-weather highway and 130km from the Chibougamau rail head linking the resource directly to future processing in Bcancour or export facilities in Eastern Canada." The Moblan Ore Reserves have been estimated with an effective date of June 30 th , 2025. A total of 48.08Mt of Proven and Probable Ore Reserves are estimated at an average grade of 1.31% Li 2 O, which is comprised of 5.33Mt of Proven Ore Reserves at an average grade of 1.57% Li 2 O and 42.75Mt of Probable Ore Reserves at an average grade of 1.27% Li 2

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View this 6-K filing on SEC EDGAR