Brunswick's Dual Threat: Anatacau Discovery Could Reshape its Lithium Future

MONTREAL, QC – June 10, 2026 – Brunswick Exploration (TSX-V: BRW) today unveiled final assay results from its winter drilling program that significantly expand the scale of its Anatacau Main Project, signaling the potential emergence of a major new lithium discovery in Quebec’s prolific James Bay region. The high-grade intercepts and expanded footprint are bolstering the company's view that Anatacau could become a cornerstone asset, complementing its already massive Mirage project.

The latest findings confirm the Anais Main dyke, a large, lithium-rich pegmatite body, now extends over 350 meters and remains 'open in all directions,' a technical term that has investors and geologists watching closely. This suggests the deposit's full size has yet to be found and could grow substantially with further exploration.

A Discovery Unfolding at Anatacau

The highlight of the announcement is drill hole AN-26-12, which intersected a substantial 27.4-meter section grading 1.13% Li₂O. This high-grade mineralization was found at a shallow vertical depth of just 90 meters, a critical factor that could positively influence the economics of any future mining operation by potentially reducing extraction costs. This intercept is part of a wider mineralized system now delineated over an area approximately 350 meters wide by 600 meters long, a footprint that has grown with each successive drilling campaign.

The geology at Anatacau is characterized by a series of seven identified mineralized dykes more than 10 meters wide. These are described as 'stacked' and 'subparallel,' an arrangement that can dramatically increase the total mineralized volume in a concentrated area, akin to finding multiple valuable layers in a cake instead of just one. The main Anais dyke alone is estimated to be about 40 meters wide. The consistency of high-grade lithium found across multiple holes, including a previously reported intercept of 1.60% Li₂O over 58.5 meters, underscores the project's robust potential.

The Dual-Play Strategy: Anatacau and Mirage

These results have emboldened Brunswick Exploration's leadership, with President and CEO Killian Charles stating, “Anatacau is rapidly shaping up to be one of the most exciting new discoveries in the James Bay region.” He added, “We now strongly believe that Anatacau is starting to show the same potential as our Mirage project.”

This comparison is not made lightly. The Mirage project is Brunswick's flagship asset and already boasts one of the largest undeveloped hard-rock lithium resources in the Americas, with an inferred mineral resource of 52.2 million tonnes grading 1.08% Li₂O. By drawing a parallel between the two, the company is signaling its strategic vision: building a portfolio with two potentially world-class lithium assets. This dual-project strategy could de-risk the company's development pipeline and provide multiple paths to production, a rare position for an exploration-stage firm.

Adding to the project's allure is its geological address. Anatacau sits within the same structural corridor that hosts Rio Tinto’s massive Galaxy Project, which contains a combined resource of over 110 million tonnes of lithium ore. This proximity suggests Anatacau is located in a highly endowed and structurally favorable setting for large-scale lithium deposits, lending significant credibility to its exploration potential.

Beyond Lithium: The Polymetallic Prize

While lithium remains the headline commodity, the latest drill results hinted at a broader opportunity. Assays from holes drilled to test the system's eastward extension returned elevated values of cesium and tantalum. Although these holes did not hit significant lithium, the presence of these other critical metals is a highly positive geological indicator.

Lithium at Anatacau is hosted in Lithium-Cesium-Tantalum (LCT) pegmatites. The presence of enriched cesium and tantalum confirms the system is highly 'fractionated'—a geochemical process that concentrates rare and valuable elements. Cesium is a rare metal used in specialized technologies like atomic clocks, while tantalum is essential for high-performance capacitors in electronics. The discovery of these metals, even outside the main lithium zone, expands the exploration target area and suggests the potential for a polymetallic deposit, which could add significant economic value and operational flexibility in the future.

Navigating the Market and Looking Ahead

For junior explorers like Brunswick Exploration, promising drill results are the lifeblood that attracts investor attention and capital. While the company's stock has faced pressure in a challenging market for junior miners, with shares trading near the lower end of their 52-week range, these results provide a powerful counter-narrative. They demonstrate tangible progress and the potential for significant value creation as the project advances.

Like many exploration companies, Brunswick is not yet generating revenue and operates with tight working capital. However, it has a clear and aggressive path forward. The company plans to complete a drilling campaign at its flagship Mirage project before returning its drills to Anatacau in the third quarter of 2026. This continuous operational momentum is designed to systematically expand the known mineralization and move the project toward a formal resource estimate.

This discovery comes at a critical time for the global economy. As the world accelerates its transition to electric vehicles and renewable energy, the demand for lithium is projected to soar. Securing a stable supply from politically stable jurisdictions like Canada has become a top priority for governments and manufacturers. The continued success at Anatacau not only strengthens Brunswick Exploration's position but also reinforces the James Bay region’s standing as a globally significant hub for the critical minerals essential for a decarbonized future.