Great Southern Copper plc announced that it has completed the necessary permitting procedures to commence its proposed scout reverse circulation (RC) drilling programme at Especularita with drilling planned to commence in the first half of December 2023. Highlights: Especularita drilling programme to begin in the first half of December 2023: At the Abundante prospect, 3-4 scout RC drillholes totaling 600-800m will target high-grade Cu mineralisation associated with tourmaline breccia-pipe hosted copper mineralization; Construction of access tracks and drill platforms has commenced in preparation for rig arrival. All permitting, environmental studies, OHS procedures and community engagement completed to enable drill programme to commence.

Drilling to commence at Especularita: Earthworks required for the construction of access tracks and drilling platforms (pads) has commenced at the Abundante prospect following successful regulatory permitting of the drill programme, completion of environmental management plans and finalization of community engagement programmes. Regulatory OH&S procedures, required for drilling projects in Chile, have also been finalized allowing drilling to now commence. RC drilling and assay results: Local Chilean company, DV Drilling based in La Serena, has been contracted to complete the RC drilling programme at Especularita utilising a truck-mounted EDM 2000 reverse circulation (RC) drill rig.

The RC drilling technique provides significant advantages to the Company in that it will deliver faster drilling times at a lower cost compared to diamond drilling techniques. No sample preparation is required as in the case with diamond core and samples will be delivered directly from the drill site to the assay laboratory so that the Company will receive the assay results sooner. In addition, sample sizes are considerably larger and therefore may be more representative of the mineralization.

The RC samples will be delivered by the Company to ALS Laboratories in La Serena, Chile where they will be prepared (dried, weighed, crushed and pulverised) prior to assay. A 30g aliquot of each sample is then assayed for Au (FA and ICP-AES) and 48 elements (ICP-MS).