Why REEs Occur in Different Minerals at Motzfeldt 

Rare earth elements are not a single-element resource, but in fact consist of 17 different elements (the 15 lanthanides plus scandium and yttrium). These rare earth elements, or REEs, occur inside different host minerals, and which minerals host them depends on the geology and the sequence of mineralising events.

At Motzfeldt in South Greenland, rare earth mineralisation is linked to a complex intrusive system known as an alkaline silicate roof-zone, where mineral formation occurs in more than one stage. An earlier magmatic stage can be followed by later hydrothermal events, where hot fluids move through structures and form or modify minerals in veins.

That is why you can see different REE-bearing minerals in different settings. For example, pyrochlore is a key ore mineral in alkaline systems and is best known for hosting niobium and tantalum, and it can also carry some REEs. Later, vein-related mineralisation can include other REE-bearing minerals such as bastnäsite, and related phases such as columbite in the wider system.

This is why exploration goes beyond simply detecting elements. Assays tell you what elements are present, whereas understanding the precise mineral hosts, textures (how minerals are arranged and intergrown in the rock), and geological setting helps to explain how and where those minerals occur within a given deposit area. That strengthens the geological model and improves targeting, supporting a more informed approach to resource evaluation and potential mineral recovery optimisation. This is the rigorous approach we are following at Motzfeldt as we seek to unlock the full value in one of Greenland’s foremost rare earth projects.

Reflection: When you follow a rare earth project, do you want mineral hosts explained alongside grades?

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