Quest Critical completes drill hole testing at Tisova

Executive Summary

• Quest Critical Metals Inc. announced the results of diamond drilling testing a strong induced polarization (IP) anomaly located stratigraphically below the historical Tisova-Klingenthal copper-cobalt deposit.
• The drilling program targeted areas identified by 2019 and reprocessed 2024 geophysical data, aiming to extend the historical mine's mineralization.
• Significant intersections included 4.3 meters of mine stratigraphy with elevated copper and gold values, as well as a 76.5-meter zone of disseminated pyrite within altered stratigraphy consistent with a Besshi-type deposit model.

Key Details

• Drilling Program: Consisted of two diamond drill holes targeting a strong IP anomaly below historical mine workings.
• Hole 1: Abandoned at 393 meters due to faulting.
• Hole 2 (479.5 meters):
  • Intersected 4.3 meters of mine stratigraphy from 67.3 to 71.6 meters, assaying 1,901 ppb copper, including 2.0 meters of 0.2 ppm gold. This zone is interpreted as the main historically mined ore zone.
  • Intersected 76.5 meters of 2 to 5 percent disseminated pyrite within a strongly silica and phyllitic altered zone from 328.7 to 406 meters. While barren, this horizon fits the Besshi-type deposit model as a strongly altered stratigraphic section.
  • All intersections are noted to be close to true width.
• Historical Context: The Tisova mine was actively mined from 1627 until 1970, with historical sulphide zones containing grades up to 17.1% Cu, 0.69% Co, and 3.7 g/t Au.
• Geophysical Basis: The drill target was generated from 2019 IP and resistivity survey data, which was reprocessed and remodeled by independent geophysicists in 2024, confirming the anomaly.
• Exploration Methodology: The project utilized the EU-financed Exploration Information System (EIS) toolkit, employing a knowledge-driven Fuzzy Logic approach to integrate spatial data sets (copper/zinc soil and stream sediment anomalies, metabasaltic lithology) relevant to Besshi-type volcanogenic massive sulphide deposits.
• Future Outlook: The prospectivity model defined anomalies of potential mineralization, including the historical Tisova deposit and additional targets aligned along the same stratigraphic horizon requiring further exploration follow-up.
• Qualified Person: Garry Clark, PGeo, Clark Exploration Consulting, reviewed and approved the technical content.

Notable Quotes

• "Quest's Tisova-Klingenthal Cu-Co deposit was the test site of the European Union-financed (EU) exploration information system (EIS) project, which aimed to develop innovative exploration concepts and advanced data analysis tools to increase the likelihood of discovering new sources of critical raw materials vital for the EU's economy."
• "The company remains encouraged by the project's underlying potential and is committed to advancing exploration efforts to define future drill targets."