The Isle of Arran is one of the few locations in Great Britain where you can find minerals with rare earth element.
REE's (rare earth elements) are a select group of chemical elements in the periodic table that have similar physical properties. Some of them are not that rare, it seems they are rarer as usually they are not created in a large amount in the same area and are usually found in minerals and not as deposit containing only themselves.
Rare earth elements are also known as rare earth metals as all REE's are classified in the metals group. A mixture of different rare earth metals are usually found deposited together.
Rare earth elements are processed to form oxide compounds, with REE's also being referred to as rare earth oxides.
Isle of Arran and Rare Earth Elements
The most significant enrichments of the REE known in the British Isles are in north west Scotland, in Silurian alkaline igneous intrusions that were emplaced at the end of the Caledonian Orogeny. In the Loch Loyal syenite complex, veins of hydrothermally altered mafic syenite that are rich in allanite and apatite contain up to 2 wt per cent total rare earth oxides (Walters et al., 2013). During the Palaeogene, rift related igneous complexes associated with the opening of the North Atlantic developed in western Scotland and Northern Ireland. Occurrences of REE-bearing minerals such as fergusonite and gadolinite are found in several of these complexes, most notably in the Northern Arran granite in Scotland and in the Mourne Mountains of Northern Ireland, where REE minerals are locally concentrated in alluvial sediments derived from the granites. Carbonatites are rare in the British Isles, with the most important being the Permian Beara-Allahies carbonatite in western Ireland (Brady and Moore, 2012). This has previously been mined for copper, and has minor enrichment in REE.
REE in alkaline igneous rocks and carbonatites - REE mineralisation in the British Isles | EURARE project
A suite of rare earth element bearing minerals has been identified from miarolitic cavities in the northern Arran granite. This is the first occurrence in the British Isles of in situ fergusonite and gadolinite to be confirmed by X-ray analysis. The presence of these minerals reflects the enrichment of rare earth elements in the highly fractionated granites in the southern sector of the British Tertiary Igneous Province.
Rare-earth-bearing minerals fergusonite and gadolinite from the Arran granite | Lyell Collection
Isle of rare earth metals
Do you happen to find rare earth metals together as the host material or its elements have been transmuted into a variety of similar forms?
Perhaps a slightly different amount of energy transforming the material into the different metals?
Perhaps they have been bombarded with different wave forms in the electromagnetic spectrum?
Perhaps being 'zapped' by a strong plasma discharge event could add, remove, change their atomic structures and hence their rare earth metal name?
Or could a strong flow or surge of natural electrical energy through that geological formation transform a mineral into a metal intro a rare earth metal?
Why is Scandium associated with most rare earth metal deposits? Scandium is so intrinsically linked to rare earth elements that it is often referred to as a rare earth element.