Santiago, Chile – Great Southern Copper (GSC) has announced the commencement of reverse circulation (RC) drilling at its Victoria prospect, a significant porphyry copper target located within the company’s Especularita Project in Chile. This development, effective June 2, 2026, marks a crucial step in GSC’s aggressive exploration campaign, focusing on the highly prospective Cretaceous-age coastal metallogenic belt.
The Victoria prospect is positioned approximately 2.5 kilometers southeast of the Artemisa North target, along the southern margin of the prominent La Colorada lithocap. The ongoing drilling initiative is designed to investigate subsurface extensions of high-grade breccia-vein and disseminated copper mineralization, which have been indicated by compelling surface geochemistry and the presence of historical artisanal and small-scale mining activities.
Victoria Prospect: Unearthing Porphyry Potential
GSC’s exploration strategy at Victoria is meticulously planned, with four drill holes slated to assess the extent and grade of mineralization identified in outcrop samples. A key focus of this drilling campaign is to target areas situated directly beneath existing artisanal and small-scale mining workings. These historical operations often serve as valuable pathfinders, indicating zones of significant near-surface mineralization that could extend to greater depths within a larger mineral system.
The decision to initiate drilling at Victoria is underpinned by encouraging surface rock chip samples, which have returned exceptional grades. These include values of up to 6.9% copper (Cu), 1.85 grams per tonne (g/t) gold (Au), and 84.8 g/t silver (Ag). Such high-grade indicators from surface exposures are particularly noteworthy for a porphyry system, suggesting the potential for a robust and economically viable mineralized body at depth. The presence of gold and silver alongside copper further enhances the prospect's potential value, offering possible co-product revenue streams in future development scenarios.
According to Great Southern Copper, a substantial portion of the target area at Victoria remains largely untested below shallow gravel and scree cover, implying that the identified mineralisation could extend across a significant footprint. The systematic RC drilling employed by GSC is an efficient and cost-effective method for preliminary subsurface evaluation, providing critical data on geology, alteration, and mineralization at depth before moving to more extensive diamond drilling.
Sam Garrett, CEO of Great Southern Copper, articulated the strategic importance of the current drilling ventures: “Victoria is the third of four targets to be tested with scout RC drilling in the current porphyry exploration programme. This programme is focusing on targets on the western and southern margins of the La Colorada lithocap that display geological, geochemical and spectral features that are characteristic of porphyry copper systems.” This statement underscores GSC's methodical approach to exploration, targeting specific geological indicators known to be associated with large-scale porphyry deposits.
Strategic Context within the Especularita Project
The Especularita Project is strategically positioned at a low elevation within the highly prolific Cretaceous-age coastal metallogenic belt of Chile. This region is renowned for hosting numerous significant copper deposits, including some of the country's most productive mines. The project’s location offers excellent access to established infrastructure and essential mining services, which are critical advantages for any nascent mining operation, potentially reducing future capital and operational expenditures.
Great Southern Copper holds 100% ownership rights to both the Victoria and Artemisa North targets, providing the company with full control over exploration and potential development decisions. This complete ownership model is attractive to investors, as it removes potential complexities associated with joint ventures or minority ownership stakes in the early stages of project development.
Recent Successes at Artemisa North
The commencement of drilling at Victoria follows the recent conclusion of an equally significant drilling campaign at the nearby Artemisa North prospect. At Artemisa North, Great Southern Copper completed five holes, totaling 796 meters, reporting highly encouraging results. Each of these drill holes encountered biotite-chlorite-magnetite alteration, an assemblage of minerals widely recognized in the mining industry as a strong indicator of a porphyry copper-type system.
Furthermore, varying levels of sulphide mineralization were observed in all holes at Artemisa North. The style and intensity of both the alteration and sulphide mineralization definitively confirm the presence of a porphyry copper-type system at this target. This confirmation is a pivotal de-risking event for the overall Especularita Project, strengthening the hypothesis that the region hosts multiple, interconnected porphyry centers.
All samples from four of the five holes drilled at Artemisa North have been dispatched to ALS Laboratories in Santiago for comprehensive analysis. The results from these assays are eagerly anticipated, as they will provide precise geochemical data on copper, gold, and other potentially economic metals, which will be crucial for guiding future exploration and resource estimation efforts.
Future Exploration Plans and Geophysical Integration
Great Southern Copper's systematic exploration program extends beyond Victoria and Artemisa North. Once the current scout RC drilling program at Victoria is completed, the company intends to redeploy the drilling rig to the Artemisa South area. Here, similar tests for porphyry-related copper mineralization will be conducted, further expanding the understanding of the mineral potential along the La Colorada lithocap.
Complementing the drilling activities, GSC is also integrating advanced geophysical surveys to enhance its targeting capabilities. An audio-frequency magneto-telluric geophysics survey is currently being conducted across the extensive La Colorada lithocap. Magneto-telluric surveys are particularly effective in mapping subsurface resistivity structures, which can highlight areas of alteration and mineralization associated with large porphyry systems. This electromagnetic method helps to define the geological framework at greater depths than conventional techniques.
Adding another layer to their geophysical intelligence, plans are also in development to extend the existing Cerro Negro induced polarization (IP) survey. IP surveys are excellent at detecting disseminated sulphide mineralization, a hallmark of porphyry deposits. This extended survey work is targeted to commence in June 2026, further refining GSC's understanding of subsurface chargeability anomalies that could correspond to significant mineralized zones. The combination of drilling and advanced geophysics provides a powerful toolkit for efficient and effective exploration in complex geological environments.
Chile's Role in Global Copper Supply
Chile stands as the world’s largest copper producer, with its vast mineral endowments, particularly within the Andean and coastal metallogenic belts, contributing significantly to global supply. The discovery and delineation of new porphyry copper systems are crucial for maintaining this dominant position and addressing the growing global demand for copper, which is essential for the transition to green energy technologies.
The Especularita Project, situated within the geologically favorable Cretaceous-age coastal metallogenic belt, represents an exciting prospect for adding to Chile’s rich copper reserves. Companies like Great Southern Copper are on the frontline of exploration, seeking to identify the next generation of large-scale deposits that will feed the world's increasing appetite for this critical metal.
Market Implications and Investor Outlook
For mining industry professionals and investors, Great Southern Copper's systematic progress at the Especularita Project is a significant development. The confirmed porphyry system characteristics at Artemisa North, combined with high-grade surface samples and active drilling at Victoria, present a compelling early-stage exploration narrative.
Success in delineating a substantial porphyry copper-gold-silver deposit could dramatically enhance GSC’s valuation and attract considerable investor interest. The disciplined approach, combining scout drilling with advanced geophysics, demonstrates a prudent use of capital and a commitment to de-risking the project progressively. While early-stage exploration always carries inherent risks, the geological indicators and the strategic location in a world-class mining jurisdiction position Great Southern Copper as a company to watch in the evolving global copper landscape.
As the world intensifies its focus on electrification and sustainable energy, the demand for copper is projected to remain robust. New discoveries, especially those with high-grade potential in politically stable and infrastructure-rich regions like Chile, are vital for ensuring a consistent supply chain. Great Southern Copper's ongoing exploration program at Especularita is contributing to this essential quest, with the Victoria prospect now taking center stage in the drilling campaign.
