IMO: It seems to be fault-hosted, the plateau is the orogenic result of the fault, and the talus zone is the decay of the lowly mineralised rock in its cliff-face.
White = flat loam zone
Blue = talus till zone
Red = cliff zoneThe radiometrics outline the decaying talus zone pretty closely, where the till from the cliff face has settled.
Best case: the halo mineralisation is beneath (and previously above) the talus zone, and that there are enough lodes of high grade (nuggety, as the geo on X described) material to raise the general grade. This agrees with the 'unconformity' fault thesis that people are talking about.
Artistic impression of fault and ore lodes (note they could be 100s of metres deep):
Some precedents:
Ann: Stunning High Grade Uranium Soil Results at Portland Creek, page-127
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