There's also this: "Geomega has developed a patented...

There's also this: "Geomega has developed a patented metallurgical process for treatment of the Montviel mineralisation which is currently at optimisation stage." and "Mt Monger will engage further with Geomega as exploration advances with a view to being given the opportunity to test their technology as a potential processing option for a future development of the Pomme project". A refinement partnership down the road if MTMs metallurgical studies align with Montviel geology would be beneficial in the economic viability of the project.

Geomega's patent: US15/578,498

"A method for hydrometallurgical extraction of rare earth elements and niobium from a an ore or a flotation concentrate containing rare earth elements, niobium, iron and alkali earth metals, the method comprising removal of the alkali earth metals using an acidic solution of a pH in a range between about 1 and about 6, leaching the rare earth elements; precipitation of the rare earth elements from a resulting pregnant leach solution using sodium hydroxide, sodium carbonate and sodium bicarbonate; physically separating metal hydroxides from a resulting leach residue containing metal hydroxides, iron oxide, silicate, and pyrochlore; removing the iron oxide by physical beneficiation and then by atmospheric acid leaching; and recovering niobium from a clean solid residue by pressurized acid leaching."

Pretty much summarised, it maximises the extraction efficiency of both REEs and niobium while minimizing the presence of undesired junk.
Their approach selectively targets specific components at each stage to get the best yield and purity of the wanted elements. Overall, the results will be to enhance the economic viability and sustainability of REE and niobium production which will be a massive thumbs up for MTM.