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Great Southern Copper reports high-grade scout drilling results

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Global Mining Review,

Great Southern Copper plc, the company focused on copper-gold and lithium exploration in Chile, has announced that early results received for its scout RC drilling programmes at its Teresita and Abundante prospects confirm high-grade Cu and Au target models.


  • Intrusive related gold-copper system (IRGS) confirmed at Teresita with high-grade Au-Cu results intersected in quartz-sulphide veins up to 15m wide.
  • Significant results for scout RC hole ESP23RC010 include; 20 m at 0.57g/t Au, 5.48g/t Ag and 0.43% Cu from 35 m, including:
    • 3 m at 1.1 g/t Au, 8.71g/t Ag and 0.79% Cu from 39 m.
    • 3 m at 1.65g/t Au, 9.03g/t Ag and 0.69% Cu from 48 m.
  • High grade Au and Cu, up to 2.03g/t Au and 1.31% Cu hosted in quartz-sulphide veins.
  • Anomalous As-Bi-Co-Sb-Te assay grades consistent with the Au-Cu confirms IRGS style mineralisation and provides pathfinder geochemistry for follow-up exploration.
  • Results highlight significance of similar IRGS high-grade Cu+Au system at Victoria prospect.
  • Broad zones of anomalous copper from Abundante scout RC drilling confirms tourmaline breccia target including; ESP23RC002: 17 m at 0.52% Cu from 24 m.
  • High grade copper up to 1.83% Cu was intersected in breccia which remains open at depth and to the west and south.
  • Planning for follow-up exploration to define prospect-scale drilling now in progress.
  • Assay results still pending for five drill holes at Teresita.

Next steps:

The company will await the final results of the scout drilling before making definitive plans for follow-up exploration at Teresita and Abundante. Preliminary results have confirmed the IRGS model type for mineralisation at Teresita where high-grade gold and copper is hosted in quartz-sulfide veins that are over-printed near surface by late-stage carbonate veining. Individual veins within the broader Teresita system ‘pinch and swell’. However, quartz-sulfide veins may become more coherent with depth below the surface carbonate alteration. Gold and copper grades vary throughout the system. Evidence of high-grade cores to the veins with broader lower-grade haloes is encouraging. Anomalous Ag-As-Bi-Sb-Co-Te pathfinder geochemistry is significant from an exploration perspective.

Follow-up exploration will focus on delineating the vein targets in more detail for Phase 2 prospect-scale drilling programmes. This work may include detailed soil geochemistry across the whole system and geophysics (magnetics, IP, EM).

Sam Garrett, CEO of Great Southern Copper, comments:

“These results have exceeded our expectations and, more importantly, confirm the target models that we have developed from our surface exploration work to date. Intersecting a 10 – 15 m wide mineralised vein at shallow depths supporting grades over 2 g/t Au and 1% Cu beneath a target outcrop 2 m wide and assaying 0.6 g/t Au is very encouraging.

“The Teresita scout RC results are very promising given the potential scale of the system mapped at surface, which to date demonstrates a cumulative strike length of over 5 km.

“Given that the same style of IRGS mineralisation has been discovered at the Victoria prospect, these results are particularly exciting as they indicate that GSC’s Especularita project hosts at least two of these large-scale, high-grade IRGS systems.”

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Copper mining news Gold mining news South American mining news