Prismo talks final sampling results at Silver King

Executive Summary

• Prismo Metals Inc. released final high-grade silver assay results from the Crown porphyry target at its Silver King project, confirming significant mineralization associated with quartz-sulphide veins.
• The company completed a pole-dipole Induced Polarization (IP) survey in December 2025, identifying key chargeability and resistivity anomalies at the Crown porphyry, Silver King diorite porphyry, and Black Diamond replacement areas.
• The company confirmed that its proposed drill plan meets Forest Service regulatory requirements and is proceeding with a categorical exclusion environmental analysis, while maintaining a fully funded 2,000-meter drill program focused on the historic Silver King mine site.

Key Details

• Assay Results: Final assays from late 2025 samples at the Crown porphyry target show overlimit silver assays, indicating high-grade silver mineralization hosted by quartz-sulphide veins.
• Geological Context: The silver mineralization is associated with the Crown porphyry and complements previously reported high-grade gold assays from the stockwork intrusion (Dec. 3, 2025) and copper assays at the Black Diamond replacement area.
• IP Survey Findings:
  • Confirmed important chargeability and resistivity anomalies.
  • Silver King silver mine associated with a large low-resistivity anomaly on the contact of the Silver King diorite porphyry.
  • Low-resistivity anomalies identified at the Crown porphyry and near Black Diamond replacement mineralization.
  • Highest chargeability anomalies linked to altered country rocks along intrusive contacts; a chargeability high also associated with the Crown porphyry stockwork intrusion.
  • The Crown porphyry anomaly is traceable from shallow levels to approximately 300 meters in depth.
• Drilling Program:
  • Immediate priority is a fully funded drill program of approximately 2,000 meters.
  • Focus: Testing the upper half of the steeply dipping pipe-like Silver King mineralized body and potential mineralization adjacent to the historic dense stockwork.
  • Future plans include drilling new targets identified by the IP survey and assay results.
• Regulatory/Permitting Status:
  • The US Forest Service determined the company's proposed drill plan meets regulatory requirements (36 CFR 228.4(c)) and is complete.
  • Environmental analysis is proceeding as a categorical exclusion under the National Environmental Policy Act (NEPA), representing the lowest level of environmental review.
• Quality Control: Samples analyzed by SGS (preparation in Tempe, Ariz.; analysis in Burnaby). Controls include standard pulps, coarse blanks, and lab-inserted controls.

Notable Quotes

• Dr. Craig Gibson, Chief Exploration Officer: "Prismo optioned Silver King with existing drill targets around the historically significant high-grade silver mine... Our work in the second half of 2025 indicates that we were correct, and we now have exceptional drill targets at the Crown porphyry and adjacent Black Diamond replacement areas... we now have a very significant precious metal and copper target at Silver King similar to other areas in this well-mineralized district that includes the Magma mine and the Resolution copper deposit."
• Gordon Aldcorn, President: "These additional assay results, along with the IP [induced polarization] survey information, continue to enhance and support our exploration thesis of the Silver King mine and surrounding areas... This modern-day review has yielded additional drill targets and prospective structures to our program in this already very strategically located project."
• Alain Lambert, CEO: "The results announced today confirm the vast exploration potential at Silver King. While we look forward to drilling these new targets in the future, our plans remain unchanged. Our immediate priority is to undertake our fully funded drill program... We are pleased with the steady progress on the permitting front. The collaboration of Forest Service officials demonstrates a clear commitment to supporting mining activities in Arizona."