Results suggestive of a gold-bearing hydrothermal system and multiple mineralization styles in a largely underexplored target area
Toronto, Ontario--(Newsfile Corp. - June 26, 2026) - Nuvau Minerals Inc. (TSXV: NMC) reports encouraging results from its winter drilling campaign at the Thundermine (also called Thunderwood) target area in the Company's 100%-owned Matagami Mining Camp. Drilling successfully intersected both volcanic massive sulphide (VMS)-related alteration and gold-bearing zones associated with favourable host rocks and structures, providing important geological information and confirming key elements of the historical exploration results.
"This single hole confirms both the camp's signature VMS-style mineralization and the potential to define a significant gold-bearing hydrothermal system," said Christina McCarthy, Nuvau's Chief Executive Officer. "It's the first Nuvau hole at Thundermine, and the first at the target in nearly four decades. We are excited that the alteration and veining intersected in our hole appears to be significantly wider than what shallow historical drilling intersected, especially because this hole is approximately 200 metres below where previous explorers stopped. This suggests that we could be tracking a potentially large-scale, untested gold system."
McCarthy added, "Spring runoff prevented positioning the drill rig where we intended, and drilling was suspended before the hole could exit the prospective quartz porphyry intrusive body, leaving the full extent of the intrusive and associated hydrothermal system untested. With improved ground conditions this summer, we can orient the rig to intersect the structures at the optimal angle to better define the geometry and continuity of the gold system."
Highlights from a successful winter exploration program
First hole drilled to test gold target at Thundermine confirmed gold and base metal mineralization: 5.28 g/t Au over 6.10 m, including 7.22 g/t Au over 3.1 m, within a broader gold-bearing interval.
Previous limited historic drilling (1950s and 1980s) returned intervals of high-grade gold mineralization while exploring for copper mineralization. No drilling has tested this area in nearly 40 years.
The goal of the winter program was to test an area where drilling in 1998 reported gold mineralization in a quartz porphyry rock unit; gold mineralization was intersected approximately 200 m below historical gold intercepts, suggesting a gold-bearing system continues at depth, as well as the potential for further extension. Priority targets for follow-up drilling have also been identified.
A broad, multi-zone, gold envelope was also intercepted, assaying 45.90 m of 0.24 g/t Au (incl. 0.40 m @ 6.02 g/t), highlighting the potential for more extensive gold mineralization than previously recognized.
Matagami-style VMS-type alteration and mineralization intersected higher up in the hole (base metals assays pending).
Validates a historical high-grade gold target that was not followed up on supporting the significance of the 1988 high-grade gold mineralization (see figure 2, example: 1.0 m @ 78.16 g/t, 0.8 m @ 26.40 g/t, and 9.40 m @ 4.02 g/t). Note: these results have been extracted from historical information; they have not been validated by Nuvau and are not compliant with NI 43-101. Original results are available via GESTIM, GM 48216, and GM 08790.
Next phase fully funded and underway with second rig; goal is to test several high priority gold and base metal targets, include Lotto and Daniel VMS mineralized zones
District-scale exploration opportunity in Matagami Northern Domain that hosts multiple prospective gold and base metal targets within a broader regional geological corridor, host of several significant gold deposits, including Agnico Eagle's Detour Lake Mine.