Firefox Gold - Mustajärvi Exploration Update: High-Grade Hits at East Zone, Path to Maiden Resource

The KE Report Sep 2, 2026 13:13

Summary

Hole 26MJ021 cut 1m at 124 g/t gold (~4 oz/ton) in a down-dip step-out from the East Zone's known high-grade core.

Firefox plans a maiden pit-constrained (open-pit-extractable) mineral resource estimate for early 2027, covering the East and likely Northeast zones.

Winter drilling will test the orogenic (mountain-building) gold system to ~800m depth, mirroring Agnico Eagle's Kittilä mine just 25km away.

Roughly 1.5 drill rigs are now running, with weekly assay (lab test) news flow from East, Northeast, Triangle, Central, and Lammas targets.

The 'gap zone' between East and Northeast remains permit-pending and is likely excluded from the first resource, but signals growth potential.

The guest cites Agnico Eagle's Kittilä mine — only 25 km from Mustajärvi — as a depth analog, noting it mines at well over a kilometer depth to underscore the depth potential of orogenic gold systems in the district.

Headline hole 26MJ021 at the East Zone returned 1m at 124 g/t gold within 2m at 63 g/t — equivalent to about 4 oz/ton — which Patrick reads as a narrow but very high-grade hit along the Mustajärvi Shear Zone, sitting in the heart of the deposit.
Patrick argues the maiden mineral resource estimate is on track for around January 2027 and is expected to be pit-constrained, incorporating both the East Zone and the Northeast Zone plus a portion of the intervening gap zone.
Drilling is continuing with roughly one-and-a-half rigs and about 30 holes already in various stages of processing, with a winter program staged to test depths down to ~800m — much deeper than any prior drilling at the project.
The guest frames the Mustajärvi Shear Zone as the principal conduit for gold-bearing fluids, with mineralization pinching into narrower, higher-grade veins versus wider, lower-grade halos, and notes historic nearby intercepts such as 13m of 15 g/t and 14m of 29 g/t about 50m up dip.
Beyond the resource footprint, Firefox has begun first-ever drill tests at the Triangle target (~500m north) and the Lammas zone (~800m east), and is returning to the Central Zone where high-grade mineralization was first discovered in 2018–2019.

Top takeaway Patrick argues the 26MJ021 intercept (1m at 124 g/t Au, ~4 oz/ton) reflects gold-bearing fluids focused into a tight portion of the Mustajärvi Shear Zone rather than a wider lower-grade zone — evidence the East Zone remains in the heart of a strong system.
He frames the maiden resource (~January 2027) as pit-constrained and likely to include both the East and Northeast Zones, but explicitly leaves the gap zone for a later update pending permit issuance on an exploration reservation.
He is staging a winter drill program to step out to ~800m depths along the shear zone, presenting deeper drilling as the primary growth vector for the eventual resource estimate.
He emphasizes systematic ~50m-spaced drilling to capture pinch-and-swell variability before resource modeling, rather than relying on wider step-outs, and notes ~30 holes already drilled are feeding regular, near-weekly news flow.
He positions Firefox as running multiple parallel growth pipelines — resource-area drilling plus first-pass exploration at Triangle, Lammas, and a return to Central Zone — to demonstrate district-scale upside beyond the maiden resource.

Top takeaway Cory presses the guest to distinguish infill from expansion drilling and to interpret the grade-thickness budget of the narrow but very rich 124 g/t hit, setting the technical framing for the result.
Cory repeatedly highlights the 'gap zone' between the East and Northeast zones as an obvious untested continuity target, steering the discussion toward resource upside beyond the initial estimate.