Adamera completes underground inspection at Talisman tungsten mine

Vancouver, British Columbia – TheNewswire - October 1, 2026 – Adamera Minerals Corp. (TSX-V: ADZ; OTC: DDNFF) (“Adamera” or the “Company”) announces the completion of an underground site mine inspection of its 100% owned Talisman Project in Washington State. Talisman is one of four tungsten properties comprising the Company’s Washington Tungsten Hub.

The inspection was carried out by JDS Energy & Mining Inc. (“JDS Mining”). The visit incorporated a preliminary inspection of the portal, adit and accessible workings of the former mine. The objective was to assess the value of the workings for ongoing exploration and to assess potential risks that would prevent safe re-entry. No such concerns were identified. A more detailed engineering assessment is required before more advanced underground work can proceed.

Overall, the mine is in competent rock, accessible from the portal. Only minor ground support is anticipated to re-establish safe working conditions. No water issues were identified.

Mineralization comprising chalcopyrite, scheelite and sphalerite was observed in the portal and adit access using UV light and a portable XRF (pXRF). The stopes are above the adit level and were not entered during this visit.

“The underground workings are well preserved. The mineralization seen in the adit is consistent with a potentially larger mineralized system,” said Mark Kolebaba, President and CEO of Adamera. “We now can place these shallow underground observations in the context of our 3D magnetic inversion model, which indicates that the magnetic body extends to depths of more than 200 metres, well below the approximately 30 metres that was previously mined. Knowing that the old mine is open and can be rehabilitated is important, as underground access will provide geological information and potentially drilling access for the project.”

Condition of the Underground Workings

The objective of the site visit was to establish whether the condition of the Talisman mine workings presents an immediate impediment to safe re-entry. None was identified. The visit addressed the three conditions that govern underground access.

Rock strength and ground stability: the host rock was observed to be competent and the workings stable. Full access to the mine workings remains available from the portal, and only minor ground support is anticipated to re-establish safe working conditions.

Water: no water management issues were identified. No dewatering requirement was identified.

Ventilation and air quality: the workings were well ventilated with a good flow of fresh air.

The overlying stope was not entered. Viewed from the access it appeared intact. To evaluate that area was outside the scope of the visit as the crew was not equipped with the ladders and fall-protection equipment required to enter it safely.

These observations are preliminary and based on visual examination. A more detailed geotechnical assessment, including ground support design and an inspection of the stope is required before any significant underground work commences.