..The worldwide gold yield per tonne ore has come down dramatically in last few years and now is around 1gram/tonne.
[https://srsroccoreport.com/the-big-squeeze-continues-in-the-top-gold-miners/the-big-squeeze-continues-in-the-top-gold-miners/]
Mining companies will need to develop higher yielding per tonne mines. ATAC will eventually come into play.