Star Copper talks 3-D modelling at Star

Executive Summary

• Star Copper Corp. has advanced its integrated 3D geological model for its flagship Star project in northwestern British Columbia, identifying distinct supergene, oxide, and hypogene zones.
• The company plans to conduct a deep-penetrating 3D geophysical survey (DCIP and MT) in 2026 to image chargeability and resistivity to depths exceeding 750 meters (MT beyond 1,500 meters).
• The 2026 drill program is designed to test lateral expansion and deeper extensions of the hypogene copper sulphide system, which remains open along strike and at depth beyond 700 meters.

Key Details

• 3D Geological Model Findings:
  • Delineates a well-defined, near-surface supergene enrichment zone.
  • Identifies a transition oxide zone with localized higher grades along postmineral structures.
  • Maps a broad hypogene copper sulphide system that remains open along strike and at depth, extending beyond 700 metres vertically.
  • Integrates historic drilling results, 2025 drill collar data, surface mapping, structural interpretation, and mineralization envelopes.
• 2026 Geophysical Survey Plans:
  • Utilizes deep-penetrating 3D DCIP (direct-current induced polarization) and MT (magnetotelluric) methods.
  • DCIP designed to image chargeability and resistivity to depths in excess of 750 metres.
  • MT resistivity capable of extending beyond 1,500 metres.
  • Objectives include identifying deep chargeability anomalies associated with sulphide mineralization, mapping intrusive bodies and alteration shells at depth, defining structural corridors, and providing a view of the plumbing system beneath the currently drilled envelope.
• 2026 Drill Program Strategy:
  • Designed to test both lateral expansion and deeper extensions of the hypogene copper sulphide system.
  • Aims to use integrated geologic modelling and geophysical inversion results for precise vectoring toward the core of the system and previously untested targets at depth.
  • Management believes this approach will materially reduce geological risk and sharpen drill targeting.
• Technical Validation:
  • Jeremy Hanson, PGeo, an independent contractor and qualified person under National Instrument 43-101, reviewed and approved the technical aspects of the release.

Notable Quotes

• "Porphyry systems are inherently three-dimensional and vertically extensive... Our 3-D model clearly demonstrates that mineralization extends well below current drilling, and the planned 3-D geophysical survey will allow us to see even deeper into the system. The integration of these data sets positions our 2026 drill program to be a potential game-changing event for the company." — Darryl Jones, CEO
• "The model highlights the vertical continuity of mineralization from surface through the oxide and transition zones into deeper sulphide domains, reinforcing the interpretation of a robust porphyry copper system. Importantly, deeper sulphide mineralization remains open, with limited drilling having tested the full vertical extent of the system." — Darryl Jones, CEO