One concern may be the transport cost of getting ore to Cloncurry.
Does anyone have a figure? $1 per tonne per kilometre? That's getting up to 0.5g if in the ballpark.
It may be that anything under 2g/t Au is marginal when you add up mining cost, transport cost, toll treatment charge and recovery rate (90%?). (Have I missed anything?)
Over to the AMG experts.
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