Andina Copper drills 126 m of 0.46% Cu at Piuquenes E

Executive Summary

• Andina Copper Corp. reported significant drilling results from hole PIU09 at Piuquenes East, intersecting a 126 m interval at 0.46% Cu, 0.53 g/t Au, and 2.14 g/t Ag, confirming a vertically extensive, gold-rich porphyry Cu-Au-Ag system.
• Follow-up drilling (PIU11) is underway to evaluate the northern continuity and depth of the mineralized corridor, targeting coincident geophysical anomalies to test competing structural interpretations.
• A second drill rig (PIU12) has mobilized to Piuquenes North to test a deep, low-resistivity magnetotelluric anomaly interpreted as a potential magmatic-hydrothermal source feeding the upper-level Piuquenes East and Central deposits.

Key Details

• Hole PIU09 Primary Intercept: 126 m at 0.46% Cu, 0.53 g/t Au, and 2.14 g/t Ag from 529 m downhole.
• Hole PIU09 Wider Interval: Within 402 m at 0.25% Cu, 0.21 g/t Au, and 1.19 g/t Ag from 253 m downhole.
• Geological Host & Alteration: Mineralization is hosted in crowded dioritic porphyry with intense sericitic alteration overprinting potassic assemblages; veining intensity increases downhole (40–60 veinlets/m), and higher gold grades at depth suggest proximity to a porphyry core.
• Previous Context (Hole PIU06): 208 m at 0.31% Cu, 0.13 g/t Au, and 1.24 g/t Ag from 292 m (including 98 m at 0.49% Cu, 0.16 g/t Au, and 1.26 g/t Ag from 292 m).
• Follow-up Drilling (PIU11): Positioned to intersect IP chargeability and MT conductive anomalies; designed to test northern continuity and evaluate competing structural geometries of the mineralized dioritic porphyry body.
• Piuquenes North Drilling (PIU12 & PN02): Second rig testing a deep, low-resistivity MT anomaly starting ~600 m below surface; anomaly's scale and depth are consistent with deep intrusive/magmatic-hydrothermal sources rather than shallow alteration.
• QA/QC Protocol: Core logged, photographed, and cut in 2 m intervals; analyzed at ALS Minerals (Mendoza/Lima) via fire assay (Au-AA23), four-acid digestion (Cu-OG62), and ICP-MS (ME-MS61); QA/QC includes CRMs, blanks, and duplicates.
• Technical Notes: Reported intervals are downhole lengths; true widths are undetermined; intervals represent length-weighted averages calculated without cutoff grade constraints. Mineralization remains open at depth.