FireFly's 80Mt Green Bay Asset Is Getting Denser-August Study Is the Real Test

August study, not the drill chip, is the real test at Green Bay

The next real call on FireFly is not the latest drill result by itself. It is whether those high-grade intersections can improve the resource enough to make the August 2026 study a credible restart case. Recent Core Zone intersections of 42 m at 6.1% CuEq and 51.5 m at 4.9% CuEq matter because they support the case for better continuity and higher-grade material where mine planners want it. Management has said infill drilling is helping convert more of an approximately 80-million-tonne resource into measured and indicated categories, with the updated resource and economic study targeted for August 2026.

Why the high-grade Core Zone matters

FireFly says the Core Zone contains nearly 20 million tonnes grading close to 4% copper equivalent. If that material can be scheduled into early production, it could support stronger margins in the initial years of a restart. That is the key distinction for investors: not just whether Green Bay is high-grade, but whether that grade can be turned into financing-ready inventory.

How the latest drilling changes the project case

The latest drilling does not establish the existence of mineralisation. It strengthens how much weight mine planners can place on the high-grade Core Zone.

From headline intersections to resource confidence

The current resource base already has credibility: 50.4Mt at 2.0% CuEq measured and indicated, plus 29.3Mt at 2.5% CuEq inferred. The question now is whether the latest drilling moves more of the high-grade volume into measured and indicated, rather than simply producing another strong headline intersection. FireFly says recent Core Zone drilling returned approximately 30 to 50 metres at about 4% to 6% CuEq, and that those results are supporting greater conversion into the more credible resource categories.

FireFly has also said the deposit is primarily a copper orebody with a gold credit, and that high-grade material could play an important role in the early years of production. If August shows more tonnage moving out of inferred, the project story becomes less about exploration success and more about mine planning and financing.

Why that matters for a restart case

A scoping study built around a denser, better-defined Core Zone could improve the restart case by:

• putting richer material into the early mine sequence
• reducing pressure from dilution and mining control in the initial phase
• giving planners more flexibility in sequencing

That does not settle the harder restart issues. Permits, infrastructure, metallurgy, OPEX, and overall project economics still need to be worked through. But better category conversion would move Green Bay further from a discovery story and closer to a financing discussion.

The regional tenement package adds upside optionality

If Green Bay is the base case, the wider tenement package is the option.

The exploration footprint is now much larger

FireFly has expanded its exploration footprint from 56 km² to 346 km², adding key VMS horizons across the Rambler Ming Marwan, Little Deer, and Tilt Cove areas. That broadens the project beyond a single restart narrative.

The July 2025 geophysics campaign added another layer of upside, identifying 325 conductive anomalies that may reflect sulphide systems similar to known deposits in the district. FireFly plans to systematically drill-test the highest-priority anomalies, which means the regional package is not just a larger map; it is also a set of drill-ready targets.

What to watch on the option leg

The next step is validation, not just mapping. Key signals include:

• which anomalies are prioritised for drilling
• whether follow-up results confirm sulphide mineralisation rather than just conductive rock
• whether exploration progressively proves the regional play can repeat

That option value is separate from the Green Bay restart case, but it can support the story if early targets begin to confirm mineralisation.

What August 2026 needs to show

August remains the main catalyst. The market already knows Green Bay is high-grade; the open question is whether FireFly can turn that into a credible restart case.

What to watch in the study

• Category conversion. The key signal is whether the updated mineral resource estimate moves more of the asset out of inferred and into measured and indicated, not just whether total tonnage rises.
• A mineable Core Zone. The study needs to show how the high-grade material fits into the early mine sequence, not simply describe it as the best part of the deposit.
• Engineering continuity. Management has pointed to strong continuity in the Core Zone. August needs to translate that into a coherent restart case with fewer gaps between geology and mine planning.

Confirmation versus invalidation

Confirmation would be more tonnes in the credible categories and a plausible early-production sequence. Invalidation would be a heavier resource that remains mostly inferred, or a study that leans on the Core Zone without clearly showing how it fits into a mineable, financeable plan.