@stockbluesky ...."Historical metallurgical work demonstrated...

@stockbluesky ...."Historical metallurgical work demonstrated ~58% niobium recovery"

This from the actual metallurgical testing on pg 55 of the Itafos PEA....
https://itafos.com/site/assets/files/1773/itafos-araxa_technical_report_final-.pdf

" In addition, the insoluble residue that resulted from this step was Nb2O5 rich (41% recovery)."

Do you have a reference or a link for your 58% recovery claim??

The Itafos PEA also quite clearly states that part of the resource is under a tailings dam wall.
Pg 25....
" However, of particular note is that the current measured and indicated mineral resource is located at the base of a tailings dam wall."

In the PEA there are also a whole lot of cross sections of the planned mining from pg 59-61, showing in 3d for those who know how to read this information, exactly where all the mineralisation is. There is not going to be any massive increase in size.