Troilus Strikes Gold Deep, Reshaping the Future of its Quebec Project

MONTREAL, QC – August 20, 2026

In the world of mineral exploration, a single drill hole can change everything. For Troilus Mining Corp., a series of five has just rewritten the potential future of its flagship gold-copper project in northern Quebec. The company announced today that its latest drilling has intersected high-grade gold and copper mineralization far beyond the known boundaries of its resource, breathing new life into the project's underground potential and sending a jolt of confidence through the market.

The results, stemming from an extension drilling program at a target known as Zone 87 (Z87), confirm mineralization extending at least 400 metres deeper than the company’s current open-pit mine plan. This development not only suggests a much larger system than previously defined but also forces a strategic re-evaluation of how to best unlock the value buried deep beneath the Canadian shield.

Unearthing Deeper Value

The headline result from the program is from drill hole TLG-ZJ20-222-EXT26, which returned a significant intercept of 8.84 grams per tonne (g/t) gold equivalent (AuEq) over a 4.8-metre section. This interval included a spectacular one-metre core assaying 23.58 g/t AuEq, a grade that signals exceptionally rich mineralization. To put this in perspective, these results were found starting at a depth of 859 metres, roughly 300 metres beyond the limits of the mineral resource defined in the company's 2024 Feasibility Study.

Crucially, all five holes drilled in this program successfully hit mineralization, validating the geological model and confirming the continuity of a high-grade core at depth. By cleverly re-entering and extending existing drill holes, Troilus saved an estimated 2,733 metres of drilling, an efficient and cost-effective approach to exploration that underscores a disciplined operational strategy. Another hole in the program extended the known mineralized zone a full 400 metres down-plunge from the current resource.

"The results reported today are an encouraging reminder of the significant opportunity that remains at depth at Troilus," commented Justin Reid, CEO of Troilus, in the company's press release. He noted that these findings reinforce the "compelling underground potential that remains beneath Z87."

Adding another layer of intrigue, the exploration team discovered that some of the highest-grade mineralization was found within granitic dykes—rock types previously thought to be poor hosts for ore. The theory is that these younger rocks, intruding into the main deposit, may have locally remobilized and upgraded the pre-existing gold and copper, opening up new, previously overlooked areas for exploration.

A Strategic Pivot Back to the Depths

For Troilus, these results represent a fascinating turn in its development narrative. The project, which centers on a formerly producing mine, initially had an underground mining concept. However, as the company's exploration success grew, the vision evolved into a much larger, 50,000-tonne-per-day open-pit operation, as outlined in a robust Feasibility Study published in May 2024. That study already positioned Troilus as a 22-year cornerstone project in North America, with an indicated mineral resource of 11.21 million ounces of gold equivalent.

Now, the pendulum may be swinging back towards a hybrid approach. While the massive open-pit remains the foundational plan, the confirmation of high-grade, continuous mineralization at depth makes a future underground mining component increasingly plausible. This offers significant strategic advantages, including the potential to extend the mine's life, increase production flexibility, and capture high-value ore that would otherwise be left behind. The company’s 2026 exploration plan already dedicates 15,000 metres of drilling specifically to define these high-grade trends at the transition between the planned open pit and the deeper underground targets.

This strategic optionality is a powerful asset for a development-stage company. As Troilus advances toward a final construction decision, expected in 2026, it does so with a clearer picture of a project that is not only large but also growing, offering both scale and high-grade potential.

Bolstering Investor and Market Confidence

The market’s reaction was swift and positive. In response to the news, shares of Troilus Mining (TSX: TLG) climbed 8.42%, a clear signal that investors recognize the value-add of these deep intercepts. This follows a pattern of positive market response to the company's steady stream of successful drill results throughout the year.

The investment community had already tagged Troilus with a consensus "Strong Buy" rating from eight analysts, with an average price target suggesting a significant upside even before these latest results were announced. The new data further de-risks the project by confirming its geological continuity and showcasing the potential for substantial resource growth.

Situated in Quebec's famed Frôtet-Evans Greenstone Belt, the project benefits immensely from its location in a 'tier-one' mining jurisdiction known for its supportive government, established infrastructure, and access to green hydroelectric power. As the world transitions toward electrification, the project's significant copper resources are also becoming increasingly strategic, aligning with Canada's critical minerals objectives.

With an Environmental and Social Impact Assessment already submitted and engineering studies progressing ahead of schedule, Troilus is on a clear path toward production. These latest drill results don't just add ounces; they add a new dimension to the project's future, suggesting that even after defining one of North America's largest undeveloped gold-copper deposits, the company may have only just scratched the surface.