Great Southern Copper (LSE:GSCU), the small-cap explorer focused on Chile, reported results from 20 channel traverses at its Monolith target, part of the Cerro Negro prospect within the Especularita Project.
The 409 metres of sampled outcrop, comprising 214 samples, confirmed anomalous copper-silver mineralisation across every channel tested, defining a zone measuring roughly 700 by 400 metres.
The strongest interval, CH021-A, returned 56 metres at 28.5 g/t silver and 1,745 parts per million (ppm) copper, including 6 metres at 81.5 g/t silver and 7,890 ppm copper.
Another channel, CH041, delivered the longest composite at 78 metres grading 10.1 g/t silver and 736 ppm copper.
Surface leaching and oxidation have depleted the outcropping mineralisation, a pattern the company said points to potential for higher grades at depth.
Monolith sits 400 metres southeast of the company's high-grade Mostaza discovery and hosts similar dacite dome-style mineralisation.
"These results reinforce Monolith as a priority target within the Cerro Negro prospect as we continue to refine our geophysical interpretation and drill-targeting plans," said Sam Garrett, chief executive.
Soil and spectral sampling continues across the wider Cerro Negro portion of the La Colorada lithocap, with additional geophysical surveys planned to refine drill targets ahead of scout drilling.
News Intelligence what this means for the company
Great Southern Copper's channel sampling at Monolith has defined a 700 × 400 metre zone of anomalous copper-silver mineralisation, with the strongest interval returning 56 metres at 28.5 g/t silver and 1,745 ppm copper. The company interprets surface depletion as evidence of higher grades at depth and plans geophysical refinement ahead of scout drilling—a typical early-stage exploration step that advances the target but does not yet establish economic ore.
The Monolith results confirm a drill-ready target within the Especularita project and support the company's exploration thesis in the coastal copper belt, but remain surface samples subject to oxidation loss. Execution risk on drilling and resource definition remains material for a capital-dependent junior explorer.
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