Hi ha molts mecanismes de concentració d’elements químics a partir de la seva dispersió ge oquímica per tal de formar dipòsits minerals d’interès econòmic. La diversitat de processos geològics que han configurat el subsòl de Catalunya permet esperar una gran diversitat de recursos, molts d’ells explotats ja de fa segles. En aquest treball es discuteixen les possibilitats que alguns recursos d’elements rars, mai investigats en detall, es puguin trobar a Catalunya, i es conclou que hi ha recursos potencials en aquests elements formats per processos de fraccionament magmàtic, hidrotermal i supergènic.

There are many mechanisms for the concentration of chemical elements from their geochemical dispersion to the formation of mineral deposits of economic value. The diversity of geological processes that were active during the geological history of Catalonia led to the creation of a wide range of mineral resources, many of which have been exploited for centuries. This paper discusses the possibility that some rare element resources that have never been thoroughly investigated could be found in Catalonia, and concludes that potential resources of these elements have been formed by magmatic, hydrothermal, and supergene fractionation processes.