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Fig. 15

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Example of relationships between field observations, measurements and/or sample analyses allowing to define or refine a geological event. Here, geochronological and geochemical studies make it possible to characterize a genesis event (magmatic event in pink), responsible for a granite emplacement in Ordovician time. Metamorphic studies allow to characterize a transformation event (tectono-metamorphic event in green) as Carboniferous in age; responsible for the transformation of this granite into orthogneiss. These two different geological events are assigned to the lithostratigraphic unit named “Canigou gneiss”. The interpretive geological model is updated, the Canigou gneiss genesis event is the Ordovician magmatic intrusion (model 2) instead of the Ediacarian magmatic intrusion (model 1).

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