McFarlane’s Juby Filing Separates Growth From Revisions

McFarlane Lake Mining filed an updated Juby Gold Project resource estimate reporting 1.07 million indicated ounces and 5.09 million inferred ounces, with the stated growth rates measured against its September 29, 2025 technical report.

McFarlane Lake Mining Limited (OTC: MLMLF) has filed an updated mineral resource estimate for its Juby Gold Project in Ontario, reporting a larger gold inventory than in its previous technical report but a mixed revision to the estimate announced in August. The distinction matters: the headline growth percentages and the latest adjustments use different comparison points.

The filed estimate contains 1.07 million indicated ounces of gold and 5.09 million inferred ounces. McFarlane says those categories increased 6% and 61%, respectively, from the previous technical report, which had an effective date of September 29, 2025. Against the estimate announced August 17, 2026, however, inferred resources increased by 30,000 ounces while indicated resources decreased by 70,000 ounces.

That makes this a story about both resource expansion and the composition of the resource. For investors assessing an exploration and development company, the amount of gold matters, but so does the level of geological confidence attached to it.

The growth rates and amendments use different baselines

McFarlane describes the filed technical report as a minor amendment to its August announcement. The current figures and the changes were detailed by INN Precious Metals. The report was prepared under NI 43-101, Canada’s mineral-project disclosure framework, and is available through the company’s SEDAR+ issuer profile and website.

The 61% increase in inferred resources should not be read as growth since August. It is the company’s stated comparison with the earlier technical report effective in September 2025. The same applies to the 6% increase in indicated resources. Those percentages describe the broader change from that earlier baseline, rather than the amendment made during the filing process.

The August comparison tells a narrower story. The filed estimate adds inferred ounces and reduces indicated ounces relative to the previously announced estimate. Those adjustments do not contradict the reported growth from the older technical report; they answer a different question.

The supplied facts do not explain the technical reason for the amendments. They therefore do not establish whether the changes resulted from classification decisions, modeling adjustments or another factor. In particular, the figures alone should not be treated as evidence that a specific block of gold moved from the indicated category to the inferred category.

Resource confidence matters alongside the ounce count

Juby’s indicated resource is reported at 0.96 grams of gold per tonne, contained in 34.68 million tonnes. Its inferred resource is reported at 0.87 grams per tonne, contained in 183.05 million tonnes. Grade describes the concentration of gold in the material; tonnage describes the amount of material included in the estimate.

Indicated and inferred are not interchangeable labels. An indicated resource carries greater geological confidence than an inferred resource. The inferred category relies on evidence that is less sufficient to establish geological and grade continuity with the same confidence. Further work can strengthen that understanding, but a resource upgrade is not guaranteed.

The substantially larger inferred inventory gives McFarlane a significant body of mineralization to investigate. It also makes confidence-building an important part of the project’s next phase. For shareholders, future drilling results will matter not only for whether they identify more gold, but also for whether they support a better-defined resource.

A mineral resource is also not a mineral reserve. Reporting contained gold does not establish that all of it can be mined profitably. Economic extraction depends on factors such as mine design, recovery, operating costs, capital requirements and permitting. The supplied update does not establish a production decision, a mine construction timetable or project profitability.

Recovery is encouraging, but not an economic verdict

McFarlane reports overall gold recoveries of 92%. Recovery describes the proportion of gold that a processing method can extract from the material tested or evaluated. It is relevant because gold contained in rock and gold recovered into a saleable product are different measures.

The reported recovery provides a useful technical reference, but it should not be applied mechanically to every resource ounce as though it were a forecast of eventual production. The supplied summary does not describe the testing conditions, variability across the deposit or a commercial processing plan. Those details would be needed to judge how representative the recovery figure is.

Grade and recovery also need to be considered alongside the amount of rock that would have to be handled. A large resource can offer development options, yet size alone does not resolve the costs of mining and processing it. The relevant question is whether an eventual project design can turn the geological inventory into an economically workable operation.

For that reason, the filing is best understood as an updated technical foundation. It gives investors a resource estimate to examine, not a substitute for an economic assessment. The distinction is particularly important when the bulk of the reported ounces remains in the inferred category.

More drilling creates room to test the resource

A new drilling permit extends McFarlane’s drilling program to August 2029, and the company says it is adding two more drills in October. Juby is located in the Abitibi Belt in Ontario, Canada. The permit and planned equipment additions give the company scope to continue investigating the project.

A drilling permit, however, is permission to conduct that activity, not approval to build or operate a mine. Additional drills expand exploration capacity, but the supplied information does not specify their targets, expected output or the funding required to sustain the program.

The most useful developments to watch are therefore concrete: where drilling is directed, what the results establish about continuity and grade, and whether later estimates change the balance between indicated and inferred resources. Investors should also distinguish drilling intended to expand the deposit from drilling intended to improve confidence within an existing resource.

MLMLF’s last-trade snapshot at 20:00 GMT on October 2, 2026 showed a 1.54% daily decline. That timestamp precedes the supplied publication time for the filing news, so it does not establish a market reaction to this report. The investment question remains whether further technical work can translate Juby’s larger resource base into a more firmly supported development case.

Key facts

• Indicated resource: 1.07 million gold ounces at 0.96 g/t in 34.68 million tonnes.
• Inferred resource: 5.09 million gold ounces at 0.87 g/t in 183.05 million tonnes.
• Revision from August announcement: Inferred resources increased 30,000 ounces; indicated resources decreased 70,000 ounces versus August 17, 2026.
• Last traded quote: MLMLF: 0.34 (currency unspecified in supplied data), down 1.54%; last trade October 2, 2026, at 20:00 GMT.

Frequently asked questions

What does McFarlane’s filed Juby resource estimate contain?

McFarlane Lake Mining’s filed Juby estimate reports 1.07 million indicated gold ounces at 0.96 grams per tonne in 34.68 million tonnes, plus 5.09 million inferred ounces at 0.87 grams per tonne in 183.05 million tonnes. The project is in Ontario’s Abitibi Belt.

What is the baseline for the reported resource increases?

The stated 61% increase in inferred resources and 6% increase in indicated resources are comparisons with the previous technical report, which had an effective date of September 29, 2025. They are not growth rates measured against McFarlane’s resource estimate announced on August 17, 2026.

How does the filing differ from the August estimate?

McFarlane describes the filed report as a minor amendment to the estimate announced August 17, 2026. Inferred resources increased by 30,000 ounces, while indicated resources decreased by 70,000 ounces. The supplied summary does not explain the technical cause or establish that ounces were directly transferred between categories.

Are Juby’s reported resources the same as mineable reserves?

No. Mineral resources describe an estimated geological inventory, while mineral reserves require additional technical and economic support for extraction. Indicated resources have greater geological confidence than inferred resources. Juby’s reported ounce counts alone do not establish a profitable mine, a construction decision or an eventual production schedule.

What does the reported 92% gold recovery mean?

Gold recovery measures the proportion of gold that processing can extract from material tested or evaluated. McFarlane reports overall recovery of 92%, but the supplied summary does not detail testing conditions or a commercial processing plan. The figure should not be treated as a guaranteed recovery rate for every resource ounce.

What drilling activity is planned at Juby?

McFarlane says a new permit extends its drilling program to August 2029 and that two more drills are being added in October 2026. Further drilling could help investigate resource extent and geological confidence, but the supplied information does not specify targets, drilling output or guaranteed resource upgrades.

Sources

• McFarlane Files Updated Mineral Resource Estimate on Juby Gold Project — INN Precious Metals

Photo: PIX1861 · Pixabay Content License — source