Star Copper drilling final phase 1 hole at Star

Executive Summary

• Star Copper Corp. has completed hole E (S-054A) and is advancing hole F (S-055) as part of the Phase 1 drilling program at its Star project in northwestern British Columbia.
• The Phase 1 program successfully expanded the known mineralized supergene footprint at the Star Main zone up to 250 metres by 300 metres and confirmed copper mineralization across multiple intrusive phases.
• Results have refined the structural and alteration models, including potassic halos and supergene enrichment, with a Phase 2 drill program slated for fall 2025 to test stepouts and depth extensions.

Key Details

• Hole E (S-054A):
  • Collared at the eastern margin of the Star Main system to test a coincident magnetic and IP chargeability high.
  • Intersected Late Triassic Stuhini Group volcanic and epiclastic rocks overprinted by phyllic alteration with local potassic zones.
  • Observed chalcopyrite mineralization primarily as fine disseminations and in quartz sulphide veinlets, often accompanied by pyrite.
  • Multiple fault zones and breccias were intersected, helping map the structural framework guiding mineralization.
  • Successfully clarified alteration zonation and mineral controls across the geophysical anomaly.
• Hole F (S-055):
  • Currently under way, having reached a depth of 188 metres.
  • Designed to test the southern margin of the previously identified IP anomaly near historical holes S-017 and S-019.
  • Targeting mineralized quartz monzodiorite (QMD) and probing deeper into a magnetic high.
  • Early observations confirm malachite and azurite in the oxide zone; deeper sections are expected to intersect hypogene copper mineralization.
• Phase 1 Program Highlights:
  • Confirmation of copper mineralization in multiple intrusive phases.
  • Refined structural and alteration models, including potassic halos and supergene enrichment.
  • Expanded the supergene mineralized footprint at the Star Main zone up to 250 metres by 300 metres.
• Next Steps:
  • Technical team incorporating results into a refined 3-D model.
  • Phase 2 drill program planned for fall 2025 to prioritize stepouts into newly defined targets and test structural/geochemical continuity.

Notable Quotes

• "With the confirmation and extension of the supergene zone, we continue to develop an increasingly clear picture of a very exciting near-surface supergene copper zone rarely seen in these parts. Our 2025 phase 1 drill campaign was focused on testing and confirming the evidence to our satisfaction. As a result, we are excited to move forward with identifying the high-grade extension and then pushing to build out the Star target at depth along with new exploration at the proximal Star North and Copper Creek targets." — Darryl Jones, CEO