S32 Capital Project Approval Bullish
SOUTH32 LIMITED - Final Investment Approval for Sierra Gorda's Fourth Grinding Line
South32 Limited
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What this filing means
Final Investment Approval on a material copper growth project. South32's Sierra Gorda JV has approved a fourth grinding line that lifts processing capacity from ~48Mtpa to ~60Mtpa and copper-equivalent output ~30%, with first production in mid FY30. Disclosed economics are robust: ~20% IRR at US$5/lb copper, ~US$725M growth capex funded from operating cash and JV debt, ~10% lower average unit costs. With the share sold off into the print, a value-accretive brownfield expansion lands against low…
Bull case
- Lifts Sierra Gorda CuEq output ~30% to ~250kt p.a., materially expanding S32's copper exposure with first production mid FY30.
- Robust project economics — IRR of ~20% at US$5/lb Cu rising to ~23% at US$6/lb underpins attractive returns.
Bear case
- 37% of production-target tonnage is Inferred Mineral Resources at low geological confidence, creating material reserve-conversion risk before FY30 first pour.
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