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Thor Lake
Canada
De l’intrusif au dépôt en utilisant la géophysique.
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Thor Lake is a large (179.3Mt) rare earth metals deposit located in the Northwest Territories. The deposit is associated with a carbonatite complex. |
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Spectrometric measurements of Uranium and Thorium were performed to trace the carbonatite. |
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Many carbonatite complexes are surrounded by mafic alkaline rocks. They often show up as a magnetic bull’s eye combined with a gravity low, and ringed by a gravity high. The Thor Lake deposit is located under the circular magnetic anomaly in the centre of image. |
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At Thor Lake, detailed follow up exploration lead to the discovery of rare earth elements associated with this carbonatite. |