In situ LA‑ICP‑MS U-Pb titanite dating of Na-Ca metasomatism in orogenic belts: the North Pyrenean example - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Article Dans Une Revue International Journal of Earth Sciences Année : 2014

In situ LA‑ICP‑MS U-Pb titanite dating of Na-Ca metasomatism in orogenic belts: the North Pyrenean example

Marc Poujol
Philippe Boulvais
  • Fonction : Auteur
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Jean-Louis Paquette
Philippe Remy
  • Fonction : Auteur

Résumé

In the Pyrenees, in association with the rotation of the Iberian plate around Europe during the Mid- Cretaceous, a Na-Ca metasomatism is recognized as a complementary record of the hydrothermal activity that led to Na-metasomatism (albitization) and talc-chlorite mineralization. It affected metasedimentary rocks as well as Hercynian granites. In situ laser ablation ICP-MS U-Pb analyses of titanite grains formed in albitites during metasomatism date the Na-Ca metasomatism between 110 and 92 Ma. The temperature of the Na-Ca metasomatism is estimated to be approximately 550 °C. Both the time constraints and temperature estimates suggest that the Na-Ca metasomatism is related to the low-P high-T North Pyrenean metamorphism.
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Dates et versions

insu-00965320 , version 1 (25-03-2014)

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Citer

Sylvain Fallourd, Marc Poujol, Philippe Boulvais, Jean-Louis Paquette, Michel de Saint Blanquat, et al.. In situ LA‑ICP‑MS U-Pb titanite dating of Na-Ca metasomatism in orogenic belts: the North Pyrenean example. International Journal of Earth Sciences, 2014, 103 (3), pp.667-683. ⟨10.1007/s00531-013-0978-1⟩. ⟨insu-00965320⟩
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