Ann: Major Clay Hosted Ionic Rare Earth Discovery at Mt Clere, page-163

Nice approximation for an initial resource @Othala, particularly in the light of The Major's comment in the short interview with Proactive, when he mentioned that the Tower was drilled because it had ease of access via tracks made from previous drilling.
He went on to say words to the effect that they had 'only touched the surface' and there are 'a lot of other areas much more extensive than this'.
Whilst leaving a bit to the imagination, it's not too much of a stretch to eventually see a resource of the magnitude of IXR.
Whilst the focus is now on metallurgy and extraction, once suitable progress is made, I guess the focus will move to further exploration and drilling as he mentions.
Then there is Rand....