Enduro samples above 10% Cu at Newmont Lake

Executive Summary

• Enduro Metals Corp. announced results from its 2025 rock sampling program at the 100%-owned Newmont Lake project in the Golden Triangle, BC.
• The program identified a large, newly recognized porphyry copper-gold system at the Andrei target, characterized by widespread copper mineralization and a significant geophysical anomaly.
• High-grade gold and silver values were also confirmed at the Camp zone within the McLymont area, highlighting undrilled potential in historically significant zones.

Key Details

• Andrei Target (Porphyry Cu-Au):
  • Widespread copper mineralization identified with highest grade samples exceeding 10% copper.
  • 25% of samples returned values above 0.1% Cu, confirming an extensive mineralized footprint.
  • Mineralization is hosted in potassic-altered monzonite intrusions and adjacent volcanic rocks.
  • Located on the flanks of a 4-kilometer-long, open-ended induced polarization (IP) chargeability anomaly interpreted as a buried porphyry Cu-Au center.
  • Correlates with a strong magnetic high anomaly within a 14-kilometer-long corridor including FK and Southmore targets.
  • 2026 drill program is in advanced planning.
• McLymont/Camp Zone (Gold Targets):
  • Rock samples from the Camp zone returned gold values up to 110 g/t Au with 142 g/t Ag.
  • Specific narrow submetre quartz-pyrite veins within shear zones returned up to 113 g/t Au with 142 g/t Ag.
  • Mineralization is interpreted as structurally controlled along the McGilvery fault.
• General Program Statistics:
  • Total of 351 rock samples collected across the project during the July–September 2025 field season.
  • 176 samples collected from the Andrei target area.
  • 54 samples collected from the McLymont area (including 32 from the Camp zone).
  • Samples were primarily grab samples; soils and silts analyzed via Aqua Regia ICP-MS; rocks analyzed via Fire Assay (Au) and ICP-MS (38 elements).
• Other Targets:
  • Reconnaissance sampling at Twin, Orange, Burgundy, and Chachi targets.
  • Twin target showed weakly anomalous copper in soil and a single gold soil value of 78 ppb near a discrete magnetic anomaly.

Notable Quotes

• "The Andrei target represents the most compelling copper-gold opportunity identified to date on the Newmont Lake project. The combination of strong surface copper mineralization on the flanks of a large four-kilometre IP anomaly and coincident magnetic anomalies supports our interpretation of a major buried porphyry copper-gold system. These results are directly shaping drill targeting as we advance toward an inaugural drill program in 2026." — Rob Cameron, CEO
• "At the Camp zone, exceptionally high gold grades reaffirm the prospectivity of an area that was a focus of early exploration before attention shifted to the NW zone." — Rob Cameron, CEO