October 7, 2025  – TheNewswire - Vancouver, British Columbia. - Andina Copper Corporation (CSE:ADNC) (FSE:FIR) (OTCQB:PMMCF) (Andina) (the Company) is pleased to announce the commencement of field exploration at the Cobrasco porphyry copper-molybdenum project in Chocó, Colombia.

About the Cobrasco Project:

Cobrasco is located in the underexplored Chocó 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 km2) the project is defined by strongly anomalous rock, stream sediment and soil 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 mineralization system has been defined. Limited drilling to date has only tested a small portion of this mineralized system with all three diamond drillholes reporting significant mineralized intervals.

Cobrasco Central:

Limited historical drilling at Cobrasco Central consists of two holes drilled to planned depth (1046.40m and 941.60m respectively), and a third hole which was prematurely terminated at 300.60 metres. All holes intersected significant copper and molybdenum mineralization (see also Figures 1, 2 and 6):

CDH001                808 m @ 0.42% Cu, 79 ppm Mo (184 - 992m)

incl.         138 m @ 0.77% Cu, 164 ppm Mo (768 - 906m)

incl.         82 m @ 0.9% Cu, 199 ppm Mo (774 - 856m)

CDH002                754 m @ 0.46% Cu, 76 ppm Mo (152-906m)

incl.         172 m @ 0.74% Cu, 78 ppm Mo (474-646m)

CDH003                144.6 m @ 0.69% Cu, 155 ppm Mo, 1.4 g/t Ag (156–300.6m (EOH))

Mineralization at Cobrasco Central is bornite dominant with lesser chalcopyrite and molybdenite. Penalty elements, particularly arsenic, are low in drillhole assays. Such mineralization is expected to be amenable to the production of a high-grade copper concentrate using traditional mineral processing. Drillholes, rocks and soils show a consistent Cu-Mo footprint associated with potassic alteration over an area of at least 2 x 1km. 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 characterised by high grade Cu-Mo values in rocks (>0.3% Cu, >100ppm Mo) and strong sericite-sulphide alteration. Soil auger geochemistry completed over the central portion of the tenement was conducted over a nominal 100 x 80m grid, with infill to 50m x 80m over various zones of interest. The soil geochemistry provides close multi-element support for the rock geochemistry. Outside of the main Cobrasco Central area, field work has been sparse, with groundwork covering only ~30% of the property and continued exploration by Andina will advance the regional prospects to drill-ready stage.

Figure 1. Drillhole CDH001 core (794.86 – 806.05m): Quartz diorite with silica-phyllic alteration overprinted on potassic alteration, brecciation and disseminated bornite in a dark grey silica matrix

Figure 2. Drillhole CDH003 core (295.18 – 300.60m): Mineralized quartz diorite porphyry with dominant bornite and lesser chalcopyrite

Additional High Potential Copper Prospects at Cobrasco:

Historical work completed in the 1980’s “Proyecto Mande” (a joint German-Colombian technical mission centred over the Western Cordillera and Mande Batholith), and later work by Rugby Resources, was 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 2km ENE of the drilled Cobrasco Central porphyry. Streams draining this area are characterised by anomalous copper-gold-silver values, and feature strongly mineralised boulders (float) that require a comprehensive follow-up campaign to define their source and quantify their insitu extent.

Cobrasco North

Located approximately 1km 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 1km south at Cobrasco South show strongly altered calc-alkaline volcanic roof pendants carrying elevated Au values. Overall, the distribution of lithogeochemical units, assay geochemistry and magnetic response shows a major NW control for porphyry emplacement and mineralization with conjugate NE 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 programme over the NE 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 ongoing 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% Cu (float) and 0.92% Cu (possible outcrop). Limited stream sediment sampling of creeks over the greater catchment area indicates consistent anomalous drainages shedding west from the prominent N-S trending ridgeline on the eastern sector of the concession. A re-start of this stream sediment sampling programme with sampling in 2nd and 3rd order streams will assist in defining the extent of anomalism and marks the commencement of Andina’s property-wide surface sampling and multi-element characterization.

Figures 3, 4 & 5. Field activities at Cobrasco East (October 2025).

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 ongoing surface exploration work outlined above, a drill crew has been mobilized to delineate the potential size and grade of the Cobrasco Central porphyry.

Click Image To View Full Size

Figure 6. Map of the Cobrasco Project showing the Central Porphyry Cu-Mo prospect and additional porphyry targets. Only~30% of the concession area has been explored to date.

President & CEO Joseph van den Elsen commented:

“Andina Copper has evolved into a leading South American focussed 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 focussed strategy to create substantial shareholder value through strong year-round, multi-asset 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 underway at Cobrasco, and preparations are well advanced for the 2025/26 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 18 August 2025 News Release) are also expected shortly”.

The Company’s Corporate Presentation is available at: Andina Copper Corporate Presentation

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QUALIFIED PERSON

Francisco Montes, a consultant of Andina Copper Corp 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. Francisco Montes is a member of Australian Institute of Geoscientists (MAIG #4160).

ABOUT ANDINA COPPER  

Andina Copper Corporation (formerly Pampa Metals Corporation) is a unique South America- focused copper explorer listed on the Canadian Stock Exchange (CSE:ANDC), Frankfurt (FSE: FIR), and OTC (OTCQB: PMMCF) exchanges.

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.

FORWARD-LOOKING STATEMENT

This news release contains certain statements that may be deemed "forward-looking statements". All statements in this release, other than statements of historical fact, that address events or developments that Andina Copper expects to occur, are forward-looking statements. Forward-looking statements are statements that are not historical facts and are generally, but not always, identified by the words "expects" and similar expressions, or that events or conditions "will" or "may" occur.  These statements are subject to various risks.  Although Andina Copper believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guaranteeing of future performance, and actual results may differ materially from those in forward-looking statements.

Neither the CSE nor the Canadian Investment Regulatory Organization accepts responsibility for the adequacy or accuracy of this release.

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