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Les nappes briançonnaises internes et ultra-briançonnaises de la Bande d'Acceglio (Alpes franco-italiennes) : une étude structurale et pétrographique dans le faciès des Schistes bleus à jadéite

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Fait partie d'un numéro thématique : Géologie structurale et analyse tectonique
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Page 183

Sei. Géol., Bull., 29, 3, p. 183-222, Strasbourg, 1976

LES NAPPES BRIANÇONNAISES INTERNES ET ULTRA-BRIANÇONNAISES DE LA BANDE D'ACCEGLIO (Alpes franco-italiennes) UNE ÉTUDE STRUCTURALE ET PÉTROGRAPHIQUE DANS LE FACIÈS DES SCHISTE BLEUS À JADÉITE

Roger LEFÈVRE * et André MICHARD **

I — Introduction

Dans la partie méridionale des Alpes cottiennes franco-italiennes (flg. 1), dans les hautes vallées de la Maira et de la Varaita (entre 1 000 et 3 000 m d'altitude), une bande de terrains essentiellement siliceux affleure en antiforme au sein des Schistes lustrés piémontais ophio-

* Laboratoire de Géologie historique, Université de Paris-Sud, Bâtiment 504, 91405 Orsay Cedex.

** Institut de Géologie, Université Louis Pasteur, 1, rue Blessig, 67084 Strasbourg Cedex (Equipe de Recherche associée au CNRS «Géologie structurale et analyse tectonique»).

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