Andina drills 620 m of 0.45% Cu, 79 ppm Mo at Cobrasco

Executive Summary

• Andina Copper reported significant copper-molybdenum drill intercepts from hole CDH004 at its Cobrasco project in Colombia, highlighting wide, high-grade mineralization consistent with a large-scale porphyry system.
• Hole CDH005 encountered strong chalcopyrite-dominant sulphide mineralization and is currently awaiting assay results, while stepout hole CDH006 is actively drilling to test for lateral extensions.
• The company plans to mobilize a second drill rig to rapidly expand the mineralized footprint, add volume to copper grade shells, and define the system's lateral extents.

Key Details

• CDH004 Main Intercept: 620 m @ 0.45% Cu, 79 ppm Mo from 62 m, including 146 m @ 0.76% Cu, 107 ppm Mo.
• CDH004 High-Grade Interval: 579 m to 686 m returned an average grade of 0.75% Cu over 107 m, with a peak 2m assay value of 1.70% Cu.
• CDH004 Upper Interval: Upper 56 m intersected anomalous copper and silver values up to 0.39% Cu and 393 ppm Ag.
• CDH004 Lower Interval: 686 m to end of hole (900.25 m) averaged 215 ppm Cu (max 0.20% Cu over 2m), interpreted as low-grade/barren late-stage phreatomagmatic breccias.
• CDH005 Status: Completed to 934 m; intersected strong chalcopyrite-dominant sulphide mineralization with sericitic alteration overprinting potassic assemblages. Assays pending.
• CDH005 Geological Target: Tested southern extensions of the Cobrasco Central system, targeting a magnetic low embayment transitioning from intermediate diorite porphyry to fine-grained dacite-andesite and intermineral rhyolite porphyry.
• Exploration Progress: Stepout hole CDH006 is currently underway to test for large-scale extensions of the mineralized system.
• Cut-off & Dilution Parameters: Mineralized intercepts for CDH004 applied a 0.2% Cu cut-off and a maximum dilution of 20 metres.
• Geological Context: Strong Cu-Mo mineralization is hosted in intensely fractured magmatic-hydrothermal breccias developed along contacts between successive porphyry phases, indicating effective fluid focusing and favorable host rock characteristics.
• Future Plans: Mobilization of a second drill rig is planned to expedite rapid exploration and evaluation of the Cobrasco system.

Notable Quotes

• Joseph van den Elsen, President & CEO: "Following recent results from CDH003, the wide intercepts of high-grade copper mineralization reported in CDH004 further validate the size, scale and grade of the Cobrasco system. We see the potential for a globally significant deposit(s) at Cobrasco, and mobilization of a second drill rig to expedite rapid exploration and evaluation is planned. Ongoing stepout drilling will now seek to systematically expand the footprint of the system, add volume to the copper grade shells and define the lateral extents of the system".