Tinka completes 1,400 metres of drilling at Silvia

Executive Summary

• Tinka Resources Ltd. completed an initial 1,400-metre diamond drill program across four holes at the Silvia gold-copper project in Peru, targeting the Silvia NW Area A.
• Visible copper mineralization in the form of chalcopyrite was observed in all four holes, with mineralization concentrated near contacts between monzonite intrusive dikes and limestone associated with skarn alteration.
• There is an observed tendency for copper mineralization intensity to increase with depth, though this requires confirmation from assay results expected in Q1 2026.

Key Details

• Drill Program Scope: Four-hole, 1,400-metre diamond drill program completed between late October 2025 and early January 2026.
• Hole Details:
  • Holes S25-001, S25-002, and S25-004 drilled on one section line, inclined to the west.
  • Hole S25-003 drilled on a separate section approximately 100 metres to the north.
  • Depths ranged between 250 metres and 450 metres.
• Mineralization Observations:
  • Visible chalcopyrite (copper) observed in all holes.
  • Mineralization occurs over relatively narrow intervals (up to a few metres thickness).
  • Concentrated on or near contacts between monzonite intrusive dikes and limestone (skarn alteration).
  • Associated with pyrite, magnetite, and minor pyrrhotite.
  • Molybdenite present in some intersections but not directly associated with visible chalcopyrite.
• Geological Context:
  • Widespread pervasive skarn alteration in quartz monzonite and limestone (Jumasha formation).
  • Skarn consists of garnet, pyroxene, vesuvianite, and potassium feldspar (pro-grade), overprinted by chlorite, quartz, amphibole, magnetite, and carbonate (retrograde).
  • Sulphides, including chalcopyrite, typically associated with retrograde alteration.
• Future Plans:
  • Assay results for the four holes expected in Q1 2026.
  • Drill rig remains on site until end of April 2026 (wet season).
  • Ground geophysical survey (Induced Polarization and/or Magnetotellurics) planned for Q2 2026 to target zones of greater sulphide concentrations laterally and at depth.

Notable Quotes

• "The first drill program at Silvia has been completed at Silvia NW Area A... Copper mineralization appears to be relatively narrow but we are encouraged by the confirmation of its presence in the subsurface. There are multiple intervals of visible copper sulphides in some of the holes, and there appears to be a tendency for copper abundance to increase with depth, to be confirmed by assays." — Dr. Graham Carman, President and CEO