Brunswick Exploration Reports More High-Grade Cesium and Lithium Values at Anatacau Main

Executive Summary

• Brunswick Exploration Inc. announced the final results from its inaugural drilling campaign at the Anatacau Main Project in Quebec, confirming a high-priority lithium discovery with significant intercepts of Li2O, Cs2O, and Ta2O5.
• The campaign completed six diamond drill holes totaling 795 meters, with all holes intercepting mineralized pegmatites. Key highlights include 1.53% Li2O over 53.9 meters and 1.31% Li2O over 120.7 meters.
• The company plans to release its maiden resource estimate for the Mirage project within the next four weeks and will initiate a second phase of drilling at Anatacau in early 2026, following a geometallurgical study.

Key Details

• Drilling Campaign Overview: Six diamond drill holes were completed for a total of 795 meters at shallow depths (less than 150 meters vertical depth) to test pegmatite dykes mapped at surface on the Anaïs showing.
• Key Intercept - AN-25-04: 1.53% Li2O over 53.9 meters at a vertical depth of 23.7 meters.
  • Includes higher-grade interval: 1.81% Li2O over 36.7 meters.
  • Includes high Cesium intercept: 1.10% Cs2O over 1.4 meters.
• Key Intercept - AN-25-01: 1.58% Li2O over 22.0 meters at a shallow vertical depth of 14.2 meters.
• Key Intercept - AN-25-05: 1.31% Li2O over 120.7 meters (longest hole drilled to date).
  • Includes higher-grade interval: 1.66% Li2O over 47.2 meters.
• Other Significant Intercepts:
  • AN-25-02: 1.51% Li2O over 41.5 meters.
  • AN-25-03: 1.67% Li2O over 8.0 meters; 1.49% Li2O over 5.7 meters; 1.06% Cs2O over 2.1 meters.
  • AN-25-06: 1.42% Li2O over 14.0 meters.
• Geological Interpretation:
  • Three large continuous dykes are drill traced, encompassing an area of 240 meters long by 120 meters wide, extending to a vertical depth of 103 meters.
  • Mineralized pegmatites are near-surface and remain open in all directions.
  • Evidence of "dyke stacking" was observed in AN-25-04 and AN-25-01, suggesting opportunities for continued mineralization at depth.
  • Medium-grade mineralization (<1.5% Li2O) found within deformation zones suggests the footprint could extend beyond the southern side to the north-east.
• Future Plans:
  • Mirage Project: Maiden resource estimate expected within the next four weeks.
  • Anatacau Phase 2: Second phase of drilling planned for early 2026 to fully delineate the discovery.
  • Geometallurgy: Study focusing on lithium mineralization using DMS (Dense Media Separation) at SGS is underway, with results expected early 2026.
• QA/QC: Samples prepared by Agat Laboratories (methods 200075 and 200087); lower cutoff grade for reported intersections is 0.30% Li2O.
• Project Status: Anatacau Main and West projects are under option from Osisko GP, with BRW able to earn a 90% interest.

Notable Quotes

• Killian Charles, President and CEO: “These results continue to underscore the significant exploration potential at the Anatacau Main. All drill holes have returned multiple, thick richly mineralized pegmatites alongside among the highest value cesium values reported in the James Bay. The targets at Anatacau remain open in all directions and will be the focus of more work in early 2026 to fully delineate this rapidly growing discovery.”
• Killian Charles, President and CEO: “Prior to the start of a second phase of drilling at Anatacau, BRW will be releasing its maiden resource estimate for the wholly owned Mirage project. This important milestone is expected to be disclosed within the next four weeks.”