Abstract: Critical metals are those which combine significant geopolitical supply risk with applications in key technologies for which there is no current substitute. The rare earth elements (REE – 15 elements from lanthanum to lutetium, plus yttrium and scandium) are the key example of this as they underpin global developments in micro-technology and renewable energy generation, whilst their supply is currently limited to a small number of mineral deposits, mainly in China. This seminar summarises current research as part of the NERC SOS:MINERALS programme, investigating the geological processes leading to concentration of the REE, and in particular the heavy REE (gadolinium to lutetium) through magmatism, hydrothermal circulation and weathering.

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