RE: Upwards and Onwards30 May 2026 10:45
Bit more on the MRE economic cut off.
—Under the JORC Code, a Mineral Resource must have “reasonable prospects for eventual economic extraction” —
Which usually means the estimate is reported using a cut-off grade, NSR, cut-off value, mining shape constraint, or another economic filter that demonstrates the material could plausibly be mined profitably.
REE deposits are often more complex to classify because their value can more depend a lot more on the mix of different rare earth elements contained with other penalty elements hosted, the quality of the concentrate, recoveries and payability. As well as mining method, strip ratio in this case and processing cost assumptions I mentioned in last post.
Because of that, the “cut-off” is likely to be based on TREO grade with NdPr content, value per tonne or net value after processing being the other.
So the JORC may not necessarily use a single universal grade cut-off like “1.0% TREO”. It may use a more sophisticated economic threshold, but only ‘may’ at this stage.
So something to look out for when the inaugural MRE for Teufelskuppe is reported. What is so encouraging, is the technical confidence they have already gained through early field work surface sampling and some deeper test boreholes to already go ahead with classifying the resource so they are able to proceed with a scoping or similar early development study in such quick succession, which they are already progressing toward.