Ore SortersIt does not matter what size gold particles can be recovered with mechancial sorting the entire concept is flawed on environmental grounds.
There is no way that DMIRS or any of the Govt Enviromental Agencies will allow a company to strip mine thousands of sq km of the Pilbara landscape to recover gold. No way full stop.
Given current grades the concept proposed involves thousands of sq km. Even if grades were much higher than presently indicated -and Novo have found no real new gold anyway -all thus far within an old alluvial patch -it still involves hundreds of sq km and on environmental grounds will never be allowed.
Then in any areas of disturbance add the cost of rehabilitation -irrespective it may now only be bare ground with not much vegetation it will all have to be revegetated irespective of what may be there prior to disturbance.