Atico Mining drills 8.7 m of 11.44% Cu at El Roble

Executive Summary

• Atico Mining Corp. reported positive results from 19 drill holes completed in 2025 at the El Roble mine in Colombia, aimed at expanding tonnage and extending the ore body.
• Significant high-grade intercepts were identified, including 8.70m at 11.44% Cu and 14.65 g/t Au, and 6.16m at 13.32% Cu and 2.79 g/t Au.
• The company discovered a new sulphide body adjacent to the main ore body and plans to continue the drill campaign throughout 2025 to test the limits of the deposit and explore for new massive sulphide bodies.

Key Details

• High-Grade Intercepts:
  • 8.70 metres of 11.44% Copper and 14.65 grams per tonne Gold.
  • 6.16 metres of 13.32% Copper and 2.79 grams per tonne Gold.
• Additional Intercepts: Ore-grade intercepts reported in 16 other drill holes over widths ranging from 1.2 to 16.7 metres in areas with limited drilling.
• Drilling Progress: 885.6 metres of drilling completed during 2025 as part of an infill program testing the main mineralized body and adjacent areas.
• New Discovery: A new sulphide body was discovered adjacent to the main orebody during the drill program.
• Exploration Goals: The 2025 underground drilling program aims to define zones of mineralization within the historic massive sulphide body not previously exploited, expand the historically identified resource, and explore for new massive sulphide bodies.
• Reserve Data: El Roble has proven and probable reserves of 1.00 million tonnes grading 3.02% Copper and 1.76 g/t Gold (effective date Sept. 30, 2020, cut-off grade 1.3% copper equivalent).
• Mine Operations: El Roble is an underground copper and gold mine with a nominal processing plant capacity of 1,000 tonnes per day, located in the Choco department of Colombia.
• Surface Exploration: The company has identified a 10-kilometre prospective stratigraphic contact between volcanic rocks and pelagic sediments/cherts, which controls VMS mineralization and is the focus of the current surface drill program.
• Qualified Person: Garth Graves, PGeo, consultant geologist, reviewed and approved the technical information.

Notable Quotes

• "The ongoing drilling campaign in the mine vicinity continues to highlight the strong potential of the El Roble deposit, discovering new mineralization, along with successfully extending the main historical massive sulphide bodies," said Fernando E. Ganoza, chief executive officer. "These assay results continue to increase confidence in our view that additional high-grade copper and gold mineralization remains both within the historically defined bodies and beyond the previously outlined mineralized shell and are open at depth and along strike. The drill campaign is planned to continue throughout 2025."