Andina Copper Confirms New Porphyry Copper System at Piuquenes North

Andina Copper Corp. announced that diamond drill holes PIU12 and PIU13 at the Piuquenes North target have intersected multiple intrusive phases associated with porphyry-style copper sulphide mineralization within a newly identified intrusive complex. The drilling targeted a large, deep-seated low resistivity MT geophysical anomaly, and both holes confirmed the presence of copper sulphide mineralization at depth within the approximately 800m by 700m anomaly.

Hole PIU13, completed to a depth of 1,235 meters, intersected four porphyry intrusive phases. The strongest visible copper sulphide mineralization was observed between 848m and 1,045m downhole, hosted within an early mineral porphyry phase. Copper sulphide minerals, including chalcopyrite and bornite, were logged throughout the interval, occurring within quartz veins and as disseminations associated with potassic alteration. Hole PIU12, drilled to 992.6 meters, confirmed the lateral extent of the porphyry system, intersecting andesitic host rocks intruded by pre-mineral porphyry dykes containing chalcopyrite and minor bornite mineralization.

Joseph van den Elsen, President and CEO of Andina Copper, stated: "During the 2025/26 San Juan field season we continued to define and expand the recently discovered Piuquenes East copper-gold porphyry centre, while also testing a compelling undrilled MT geophysical target at Piuquenes North. Both drill holes completed at Piuquenes North intersected a multiphase porphyry copper system, with the MT anomaly remaining open to the north and at depth. Confirmation of a third mineralized porphyry system at Piuquenes North marks an important milestone for the project and further demonstrates the significant exploration potential of the Piuquenes property."

The company believes the elevated sulphide content observed in drilling is a significant contributing factor to the conductive low-resistivity response defined by the MT survey. The geometry and scale of the mineralized porphyry system demonstrate a strong correlation between the MT anomaly and copper sulphide mineralization at Piuquenes North. The anomaly remains open to the north and at depth, where additional drilling will be required to further evaluate the system's extent.

Assay results for both PIU12 and PIU13 are pending. Upon receipt, the company will integrate the assay results with updated geological logging to refine the targeting strategy for follow-up drilling, expected to focus on the down-dip and along-strike extensions of the newly intersected porphyry system. During the off-season, the company plans to undertake laboratory resistivity and chargeability measurements on representative core samples to further refine the geophysical interpretation of the Piuquenes North target.

The Piuquenes property is located in San Juan Province, Argentina, within the prolific Andean porphyry belt. Andina Copper also holds the Cobrasco Project in Colombia and a target in Chile. The company is listed on the TSX Venture Exchange (TSXV:ANDC), Frankfurt (FSE:FIR), and OTC (OTCQB:PMMCF).

For more information, the company's Corporate Presentation is available at Andina Copper Corporate Presentation.

All technical information in this release is based on visual logging of drill core. Core samples have been dispatched to ALS Minerals in Mendoza, Argentina for preparation and analysis at the ALS laboratory in Lima, Peru. The company implemented a QA/QC program with certified reference materials, blanks, and duplicates.