These mountains are part of a craton that split when Australia cleaved off Africa. Barberton Gold Mines have a mineralization that is unique in South Africa - t

These mountains are part of a craton that split when Australia cleaved off Africa. Barberton Gold Mines have a mineralization that is unique in South Africa - they actually use bacteria to cleave the gold from sulphates, if I recall. Turns out the Australian section also has gold, and the chemistry to process the gold is the same. The Barberton gold deposits were formed in an interesting process where gold saturated fluids burst into underground fissures, and the resulting rapid cooling led to crystallization. The layout of the deposits a highly unpredictable. You can mine nothing for hundreds of meters (which takes years) before hitting a chamber that will sustain you for a decade. Super interesting. And hard to run a business like that.