For starters:AJM Can't go into C&M because of debt. It has to...

For starters:
AJM Can't go into C&M because of debt. It has to keep producing and selling product or it's VA just like A40.
The only way AJM could go into C&M is if they somehow secure debt refinance on extremely favorable terms. And raise enough cash to burn through in C%M.

GXY on the other hand:
has no debt and it has cash reserves to keep Mt Cattlin in C&M so it can easily go mothball till better times.
Mt Cattlin hasn't got huge resources to burn through it just for the sake of keeping the mine open.
Sooner or later GXY has to think about protecting that resource and extract value from it for future funding of SDV and JB. It's not gonna be able to do so if it burns through resource and sell them for peanut profits or loss.
GXY has done so before.
It makes absolutely no sense for GXY to keep Mt Cattlin operational if they don't see demand/price recovery in very near term. And especially if prices deteriorate even further in 2020 (as forecasted by JL and Benchmark)
So yeah, Mt Cattlin.
I also spoke about that couple of times, few months ago.