Coast Copper expands Copper Kettle target

Executive Summary

• Coast Copper Corp. has released results from a 14-square-kilometre audio magneto telluric (AMT) geophysical survey at its Copper Kettle property, identifying a major untested porphyry target in the Northwest (NW) zone.
• The company expanded its property holdings through staking to over 5,225 hectares and completed a technical review of the NW zone, which is part of the historic Island copper cluster.
• Future plans include a 25 km detailed induced polarization (IP) survey and a conditional 10-site diamond drill program scheduled for 2026, targeting the area adjacent to BHP’s former Island copper mine.

Key Details

• Property Expansion: Coast Copper expanded the Copper Kettle property via staking to cover more than 5,225 hectares (ha) on northern Vancouver Island, British Columbia.
• Geophysical Survey Results (AMT):
  • A 54-station AMT survey (spaced at 500 m) spanning 14 square km was completed.
  • Identified a shallow conductive layer linked to known Cu-Mo mineralization within sediments.
  • Detected a larger resistive body under historic drilling, interpreted as a possible intrusive source.
  • Evidence suggests past drilling in the 1980s only addressed a limited portion of the broader system.
  • Results support the hypothesis of a sizable, mostly untested intrusive complex beneath the NW zone.
• Historical Context (NW Zone):
  • The NW zone is one of six genetically related Jurassic calc-alkaline porphyry systems forming the Island copper cluster (ICC).
  • It is the only ICC member located outside BHP's Island copper mining lease.
  • Historical drilling (1983-1989) by BHP included 31 diamond holes (9,072 m) and 10 percussion holes (789.5 m), outlining a buried system 1.8 km long and 800 m wide.
  • 17 drill holes returned significant copper and molybdenum values; 9 ended in mineralization, confirming the system remains open to depth.
• Historical Drill Intercepts:
  • Hole E-64: 277.4 m at 0.20% Cu and 0.018% Mo (0.30% CuEq) from 18.3 m.
  • Hole E-69: 91.5 m at 0.57% Cu and 0.017% Mo (0.66% CuEq) from 155.4 m, including skarn bands up to 2.93% Cu over 3 m from 228.6 m (final assay 0.24% Cu and 0.047% Mo / 0.50% CuEq over 3 m).
  • Hole W-6: 332.8 m at 0.15% Cu and 0.036% Mo (0.35% CuEq) from 106 m.
• 2025 Surface Fieldwork Results:
  • Confirmed an untested 800-metre-by-400-metre Cu-in-soil anomaly (>200 ppm Cu; peaks at 1,800 ppm) north of historical drill sites.
  • Rock samples assayed up to 2.21% Cu, 2.09% Cu, and 1.86% Cu across a 5 km west-northwest stretch.
  • Discovered a new polymetallic skarn target with assays reaching 0.46% Cu, 0.66 g/t Au, 55 g/t Ag, 7.53% Pb, and 5.96% Zn; soils contained up to 2,842 ppm Cu.
• Next Steps:
  • Intending to conduct a 25 km detailed induced polarization (IP) survey.
  • Plans a conditional 10-site diamond drill program to be conducted right beside BHP's historic Island copper mine.

Notable Quotes

• Adam Travis, CEO: "Earlier drilling only explored peripheral skarn-style mineralization, leaving much of the larger porphyry potential untested. The AMT survey reveals a significant underlying intrusion beneath zones where many holes terminating in mineralization. Our plan for 2026 is to push the project forward with a detailed induced polarization survey followed by drilling. There are clear parallels between the NW zone at Copper Kettle and the historic Island copper mine, and we're eager to elevate this property to flagship status alongside our brownfield Empire mine project which is also located on northern Vancouver Island."