Andina Copper begins field exploration at Cobrasco

Mr. Joseph van den Elsen reports ANDINA COPPER COMMENCES EXPLORATION AT COBRASCO Andina Copper Corp. has commenced field exploration at the Cobrasco porphyry copper-molybdenum project in Choco, Colombia. About the Cobrasco project Cobrasco is located in the underexplored Choco copper belt of the Colombian western cordillera, a continuation of the prolific Andean porphyry belt that extends through Chile, Peru and Ecuador to the south, and Panama to the north. Covering 3,000 hectares (30 square kilometres (km)), the project is defined by strongly anomalous rock, stream sediment and soil, and copper and molybdenum geochemical assays, coincident with geophysical signatures indicative of large porphyry systems. Mineral exploration activities in past campaigns have focused on the Cobrasco Central target area, where a large, potentially world-class Cu-Mo (copper-molybdenum) mineralization system has been defined. Limited drilling to date has only tested a small portion of this mineralized system, with all three diamond drill holes reporting significant mineralized intervals. Cobrasco Central Limited historical drilling at Cobrasco Central consists of two holes drilled to planned depth (1,046.40 metres (m) and 941.60 m, respectively), and a third hole, which was prematurely terminated at 300.60 m. All holes intersected significant copper and molybdenum mineralization, as detailed in the attached table. Mineralization at Cobrasco Central is bornite dominant with lesser chalcopyrite and molybdenite. Penalty elements, particularly arsenic, are low in drill hole assays. Such mineralization is expected to be amenable to the production of a high-grade copper concentrate using traditional mineral processing. Drill holes, rocks and soils show a consistent Cu-Mo footprint associated with potassic alteration over an area of at least two kilometres (km) by one km. The geochemical pathfinder element distribution is typical of a porphyry mineral system, reflecting an optimal, top of mineralized erosional level. The system appears to be limited to the east by a faulted contact with the Mande batholith, and to the west by andesitic host rocks and breccias with distal alteration. Mineralization remains open to the north and south. Multiple drill targets remain untested at Cobrasco Central, all characterized by high-grade Cu-Mo values in rocks (more than 0.3 per cent Cu, more than 100 parts per million (ppm) molybdenum (Mo)) and strong sericite-sulphide alteration. Soil auger geochemistry completed over the central portion of the tenement was conducted over a nominal 100 by 80 m grid, with infill to 50 m by 80 m over various zones of interest. The soil geochemistry provides close multielement support for the rock geochemistry. Outside of the main Cobrasco Central area, fieldwork has been sparse, with groundwork covering only approximately 30 per cent of the property and continued exploration by Andina will advance the regional prospects to drill-ready stage. Additional high-potential copper prospects at Cobrasco Historical work completed in the 1980s by Proyecto Mande (a joint German-Colombian technical mission centred over the western cordillera and Mande batholith) and later work by Rugby Resources were successful in delineating a number of anomalous prospects by conventional prospecting, reconnaissance mapping, rock chip, stream sediment and soil sampling, and interpretive work. Cobrasco East A large magnetic-low geophysical anomaly, possibly indicating magnetite destruction from a mineralizing porphyry system, was identified at Cobrasco East, approximately two km east-northeast of the drilled Cobrasco Central porphyry. Streams draining this area are characterized by anomalous copper-gold-silver values, and feature strongly mineralized boulders (float) that require a comprehensive follow-up campaign to define their source and quantify their in situ extent. Cobrasco North Located approximately one km north of the Cobrasco Central porphyry mineralization, the Cobrasco North zone is characterized by bornite-molybdenite veining within an area of highly elevated molybdenum in soil geochemistry. The area is also marked by an increase in A-type porphyry style veining, indicating proximity to a separate porphyry centre. Cobrasco South Similarly, the southern extensions and continuity of the Cu-Mo soil and rock geochemistry approximately one km south at Cobrasco South show strongly altered calc-alkaline volcanic roof pendants carrying elevated gold (Au) values. Over all, the distribution of lithogeochemical units, assay geochemistry and magnetic response shows a major northwestern control for porphyry emplacement and mineralization with conjugate northeastern faults coincident with mineralization and alteration trends. Southern block The southern block of the Cobrasco project is located immediately south of the contiguous Comita porphyry Cu-Mo project. Historical work in this block has been very limited, with Rugby Resources completing only a first-phase soil auger sampling program over the northeastern portion of the concession, along the projected extension of the mineralized trend continuing from Cobrasco Central and Comita to the northwest. No additional surface sampling campaigns were undertaken, or other follow-up activity completed. This area remains a high-value target and will be scheduled into the continuing property-wide exploration activity for Andina's 2025-2026 exploration campaign. Current work program summary Cobrasco East Andina Copper currently has an exploration team on site, conducting follow-up reconnaissance mapping and rock chip sampling of historical occurrences delineated by Rugby Resources in 2023. Samples of rock float and outcrop from this program reported a cluster of high-grade copper values with assay grades up to 5.38 per cent Cu (float) and 0.92 per cent Cu (possible outcrop). Limited stream sediment sampling of creeks over the greater catchment area indicates consistent anomalous drainages shedding west from the prominent north-south-trending ridgeline on the eastern sector of the concession. A restart of this stream sediment sampling program with sampling in second and third order streams will assist in defining the extent of anomalism, and marks the commencement of Andina's property-wide surface sampling and multielement characterization. Upon completing follow up work at Cobrasco East, the Andina Copper exploration team will continue reconnaissance mapping and rock chip sampling at Cobrasco North, Cobrasco South and the southern block, as well as exploring the broader regional potential. Cobrasco Central Concurrent with continuing surface exploration work outlined above, a drill crew has been mobilized to delineate the potential size and grade of the Cobrasco Central porphyry. President and chief executive officer Joseph van den Elsen commented: "Andina Copper has evolved into a leading South American-focused copper explorer holding two significant discoveries and a compelling undrilled copper-gold target along one of the world's premier copper producing belts. "Our refreshed board and management team are now executing on a focused strategy to create substantial shareholder value through strong year-round, multiasset news flow. "Cobrasco is a company-making asset, and our focus is on defining the size and grade potential of the initial discovery at Cobrasco Central, and concurrently advancing other highly prospective targets along the Eocene porphyry belt, including Cobrasco East. "This is an exciting time to be an Andina Copper shareholder as we commence concurrent field activities across our portfolio of high-quality copper and copper-gold discoveries. Exploration is under way at Cobrasco and preparations are well advanced for the 2025/2026 field season at the Piuquenes porphyry copper-gold project in San Juan, Argentina, where project wide geophysics and discovery drilling is planned. "Results from a surface sampling program recently completed to assess the potential of the Mantau copper-gold project in Antofagasta, Chile (refer [to] Aug. 18, 2025, news release), are also expected shortly". Qualified person Francisco Montes, a consultant of Andina Copper and a qualified person (QP) within the definition of that term in National Instrument 43-101, Standards of Disclosure for Mineral Projects, has verified the scientific and technical information that forms the basis for this news release. Mr. Montes is a member of Australian Institute of Geoscientists (MAIG No. 4160). About Andina Copper Corp. Andina Copper (formerly Pampa Metals Corp.) is a unique South America-focused copper explorer listed on the Canadian Securities Exchange, Frankfurt Stock Exchange and the OTCQB. The company holds two significant discoveries along the world's premier copper-producing Andean porphyry belt in Argentina and Colombia, and a compelling undrilled copper-gold target in the prolific copper production district of the coastal cordillera of Chile. We seek Safe Harbor.