Standard Uranium Confirms Strong Radioactivity at Surface During Successful Exploration Program at the Rocas Uranium Project

Executive Summary

• Standard Uranium reported strong surface radioactivity at multiple historic uranium showings on the Rocas project, with handheld scintillometer readings up to 33,000 cps.
• New radioactive anomalies were identified across >7.5 km of strike length, supporting a high‑grade, shallow‑depth uranium target model and prompting plans for a maiden drill program in 2026.
• The company completed detailed mapping, sampling (16 grab samples) and a high‑resolution ground gravity survey, delivering over 150 geological observations and 73 anomalous scintillometer readings (>300 cps).

Key Details

• Exploration period: 30 Sept – 8 Oct 2025.
• Project size: 4,002 ha, located ~75 km SW of the Key Lake Mine & Mill (Athabasca Basin margin).
• Surface radioactivity:
• Handheld RS‑120/RS‑125 instruments recorded 73 readings >300 cps; 10 readings exceeded 10,000 cps.
• Peak measurements: >33,000 cps at SMDI showing 5781; additional peaks of 26,900 cps and 25,400 cps on the same outcrop.
• Grab sample results: 16 outcrop/boulder samples submitted for whole‑rock analysis (U & REE). Notable historic data cited: SMDI showing 5781 with 1,100 ppm U (≈0.11 wt% U). Historical grab values range from 587 ppm U to 0.498 wt% U₃O₈.
• Geophysical work:
• High‑resolution ground gravity survey (contracted to MWH Geo‑Surveys; processed by Convolutions Geoscience) identified several low‑gravity anomalies coincident with historic mineralization and lake‑bed geochemical anomalies.
• Historical airborne EM (2017) defined conductive trends parallel to the Key Lake Road shear zone, extending >7.5 km of magnetic low/EM conductive corridor.
• Target model: Shallow, high‑grade basement‑hosted uranium mineralization; minimal glacial till cover enhances drillability.
• Future work: Planned 2026 diamond drill program to test high‑priority targets along the identified structural and EM corridors.
• Qualified Person: Sean Hillacre, P.Geo., President & VP Exploration (NI 43‑101).

Notable Quotes

“The confirmation of strong radioactivity at the Rocas Project is an exciting step forward, directly validating historical uranium showings and highlighting the Project's discovery potential,” – Sean Hillacre, President & VP Exploration, Standard Uranium.