RE:RE:RE:RE:RE:RE:Things That Didn't Exist 60 Years AgoCA, I am not sure who is disputing that solution mining does not work for potash as Saskatchewan alone has 2 mines that rely on solution mining.
Those solution mines also cost billions to build, as was the case for the most recent K+S mine. $4 bliion if I recall correctly.
That is not the type of mine being built by these horizontal selective solution miner hopefuls. In Gensources 2018 presentation they refer to the differences as Conventional, Conventional Solution mining and Selective Dissolution Vanguard 1 Big difference between the 3 examples
https://gensourcepotash.ca/wp-content/uploads/2018/08/Gensource-Corp-Presentation_Aug-2018.pdf These guys are literally targetting a couple meter thick, high grade sylvinite zone and they cant stray out of that layer or the processing will be thrown out of wack.
Take a look at GSPs presentation on page 25. You can see they plan on using a fraction of the processing equipment compared to the Belle Plaine version of solution mining. A lot of red X's in that diagram
https://gensourcepotash.ca/wp-content/uploads/2015/08/GSP-PPT-Comparing-BP-vs-SMERP-Feb2015.pdf I agree with you totally that high grade sylvinite seams are required to make this horizontal selective solution mining process work but I have heard > 40% - 60% is ideal.