Des scientifiques créent une carte mondiale des gisements de terres rares

Des chercheurs ont mis au point une carte mondiale mettant en évidence les endroits où l'on est susceptible de trouver des terres rares. Ces travaux associent ces métaux précieux à des caractéristiques géologiques spécifiques situées profondément sous la surface de la Terre.

Une équipe internationale dirigée par l'université de Cambridge a produit une carte prédictive des gisements de terres rares. L'étude combine les données d'environ 9 000 échantillons de roche avec des images sismiques de l'intérieur de la planète. Elle montre que les roches ignées concernées se forment principalement le long des bordures abruptes de la lithosphère continentale la plus épaisse et la plus ancienne de la Terre.

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