Agree here. Can someone explain why 85m deep holes are interesting at all here? The large set of metallurgy tests (100+ samples) show extraction drops off massively with depth as you get below around 15 m. I plotted all of the Capao Do Mel test results below which shows this clearly. It makes sense as weathering is what makes the clays leachable, the deeper you go, the less weathering (more refractory monazite/xenotime as opposed to weathered REE minerals).
Agree here. Can someone explain why 85m deep holes are...
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