Great Northern Minerals (ASX:GNM) Fieldwork Concludes for Inaugural Exploration Program at Catalyst Ridge REE-Antimony Project

4 November 2025

Overview:

Great Northern Minerals has announced that it has completed the fieldwork for its initial exploration program at its Catalyst Ridge Project. The Company expects to receive results from the sampling program in approximately two weeks

Highlights:

• Fieldwork for the comprehensive sampling and mapping program has been successfully completed at the Catalyst Ridge Project, led by GNM’s USA-based geological experts, Greg Schifrin and senior geologist Robert Kell.
• The work completed focused on rock chip and stream sediment samples from the three target areas and included reconnaissance mapping led by handheld X-ray
  fluorescence (XRF) readings.
• A total 119 samples were taken during the fieldwork, the samples have been sent to American Analytical Services in Idaho, with assay results expected by mid-November.

Next Steps

Results are expected in approximately two weeks. Upon receipt of results, GNM will undertake a detailed analysis of the geochemical data to define priority exploration targets. Subject to assay outcomes, the Company will advance to the next phase of exploration, which will include detailed geological mapping, further targeted surface sampling, followed by focused drilling to further assess the mineralisation potential.

Company Notes:

Non-Executive Chairman, Eddie King, commented: “I’m pleased to confirm that we have now completed the initial fieldwork at Catalyst Ridge, a key milestone in advancing the project. This initial campaign followed promising desktop indicators and focused on validating surface mineralisation. The results will guide our next phase of exploration as we work to unlock the Project’s Rare Earths and Antimony potential.”

Full ASX Announcement: https://hotcopper.com.au/threads/ann-fieldwork-completed-at-catalyst-ridge-ree-antimony-project.8865997/