I just finished reading the Hawk report. It confirms what I envisioned geologically. Mineralization occurring around the cork (core).
I'd be interested to see if they can find the same type of mineralization on the west side of the intrusion as well, though it may be covered by lake water. If the same clastic-carbon rich sediment is on the west side (almost 100 percent chance that it is) then niobium mineralization likely occured on that side as well at a given temperature and pressure.