Great Southern Copper has reported a 106-metre copper-molybdenum mineralised intersection from initial drilling at its Especularita project in Chile, providing the first drill confirmation of a previously identified porphyry target. Drill hole RC009 returned 106 metres grading 0.33% copper and 42 parts per million molybdenum from surface. The intersection included 54 metres at 0.46% copper, within which a 20-metre interval graded 0.57% copper. The hole ended in mineralised granodiorite, while mineralisation remains open in all directions, according to the company.
Scout Drilling Identifies Porphyry System
RC009 forms part of an initial scout drilling programme covering 17 holes and 2,474 metres. Assay results from 13 holes are still pending. The programme was designed to test a lithocap and associated geophysical targets, rather than establish a mineral resource. The first drill result provides an important technical step for Especularita by moving the target from a geological concept to a drill-tested copper-molybdenum porphyry system.
The single intersection does not yet establish the size, continuity or economic potential of a potential deposit. Further drilling will be needed to determine the geometry, continuity and grade distribution of the mineralisation and to establish whether higher-grade zones occur within the broader system.
Scale Key to Porphyry Copper Potential
Porphyry copper deposits generally rely on large mineralised volumes and substantial tonnage, rather than exceptionally high grades. For that reason, demonstrating the scale and continuity of mineralisation will be critical to assessing Especularita’s potential. The remaining scout-hole assays should provide additional information on whether the RC009 intersection forms part of a larger mineralised system or represents a more isolated zone. Follow-up drilling will also need to test whether mineralisation extends laterally and at depth, while maintaining grades comparable with those reported from RC009.
Chile Remains Major Copper Exploration Hub
Chile is the world’s largest copper-producing country and hosts some of the largest porphyry copper systems globally. At the same time, new copper developments face increasing requirements related to water, power, infrastructure and permitting, adding to the challenges of advancing exploration discoveries toward development. For Great Southern Copper, the immediate significance of the Especularita result is its potential to expand the exploration target and provide a basis for a more systematic drilling campaign.
The outstanding assays from the remaining holes will be closely watched as the company assesses the broader mineralised system. The discovery strengthens the technical case for continued exploration, but Especularita remains an early-stage project with considerable geological uncertainty. The next major step will depend on evidence that the mineralisation has sufficient scale, continuity and grade distribution to support further exploration and potentially advance the project.
