PGD General Discussion, page-4

Co Pilot not encouraging -

Aluminium in Channel Iron Rock‐Chip Assays and Sample DepthAcross both the Callisto and Europa Channel Iron Deposits (CID) rock‐chip campaigns at Cane Bore, Al₂O₃ values remain remarkably consistent from the tops of the exposed pisolite mesas down through their full vertical extents (25–30 m). There is no systematic trend toward lower (or higher) alumina as you go deeper in the channel.Key ObservationsCallisto ProspectMesa height ~25 m; sampled from top to baseAverage Al₂O₃ = 4.59 %Europa ProspectMesa height ~30 m; sampled from top to baseAverage Al₂O₃ = 3.71 %Individual assays across both prospects span only ~2.4–4.6 % Al₂O₃, with no clear down-channel decrease.What This Means for ExplorationYou can expect a flat alumina profile through the full thickness of the exposed CID pisolites.No need to factor in a depth-dependent Al₂O₃ penalty when designing metallurgical testwork or resource models for these rock chip samples.Focus can remain on other deleterious elements (e.g., P, SiO₂) or on ore continuity rather than alumina zonation.Additional NoteFor most Channel Iron Deposits, alumina is hosted in the fine‐grained goethitic matrix and pisolite rims. Because weathering and pisolite formation affect the entire vertical stack rather uniformly, Al₂O₃ grades rarely show meaningful variation with depth—just as seen at Cane Bore.