There are many alternative metallurgical methods to extract gold and the science does not stand still. As an example, who would have thought an extract of corn starch could make the process 'greener'?
https://www.australianmining.com.au/features/going-for-gold-alternative-processing-methods/
Trial open cut mining planned: ~100Koz pa Au at a conservative 1oz/t Au, page-66
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