Drilling Commences at Viuda Prospect, Especularita

Great Southern Copper plc (LSE: GSCU), the company focused on copper-gold-lithium exploration in Chile, is pleased to announce that its planned scout RC drilling programme has commenced at the Viuda prospect targeting porphyry style mineralisation.

Highlights:

• Scout RC drilling commences at Viuda prospect targeting porphyry style mineralisation,
• Programme plans for up to 8-10 drill holes totalling up to 800 - 1,500m,
• Drilling will test geochemistry, geology and geophysics targets,
• Initial hole, VIU24_RC001, confirms porphyry style alteration system from surface,
• Purchase Option Agreement allows for 100% ownership of Viuda,
• Viuda prospect is ideally located within easy access of roads, power and port infrastructure.

Drilling has commenced at the Company's Viuda prospect in Chile with the scout RC programme designed to test a porphyry model concept for the alteration and mineralisation mapped and interpreted from surface outcrops (Figure 1). The programme comprises up to 8 - 10 scout RC drill holes (800 - 1,500m) and will also test geochemical and geophysics (magnetics) anomalies reported previously1,2.

The first hole in the programme, VIU24_RC001, is in progress (Figure 2) targeting structurally-controlled mineralisation identified from mapping and sampling of artisanal mine workings and has intersected massive pyrite-albite-clay (PAC) alteration from surface which is early supporting evidence for a large-scale porphyry type alteration system at Viuda.

Sam Garrett, Chief Executive Officer of Great Southern Copper, said: "We are very pleased to have commenced our scout RC drilling programme at Viuda. Many months of hard work in preparing the permitting and authorisations required for drilling are complete and we now look forward to the results of this programme supporting our exploration efforts in the field.

The scout drill programme is designed to test our porphyry model for Viuda targeting both surface geochemistry, geology and magnetic anomalies identified from work completed by GSC earlier in the year. Already the first hole in this programme has been successful, confirming a large-scale porphyry type alteration system at Viuda with massive pyrite-albite-clay alteration identified from surface.

In addition, the permitting and approvals for drilling of our Cerro Negro prospect are anticipated to be completed within the week concluding a very busy and successful year for our team in Chile and I would like to thank them for their efforts. A drilling contractor has been arranged and construction of drill pads for the diamond drill programme is in progress."

Figure 1: Porphyry target model for GSC's Viuda prospect, Especularita Project, Chile.

Figure 2: GSC employees sampling RC drill chips from VIU24_RC001 (l), GSC geologist logging drill chips from VIU24_RC001 (r).

References:

• RNS 2087I (15 Oct 2024); New Cu-Au exploration target identified at Viuda,
• RNS 7037M (19 Nov 2024); Exploration results define Viuda drilling targets.

Forward Looking and Cautionary Statements