Field and petrological evidence for a Late Palaeozoic (Upper Carboniferous–Permian) age of the Erfaulet orthogneiss (Gran Paradiso,western Alps) |
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Authors: | Benjamin Le Bayon Michel Ballèvre |
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Institution: | Équipe Lithosphère, Géosciences Rennes (UMR–CNRS 6118), université de Rennes-1, 35042 Rennes cedex, France |
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Abstract: | In the Gran Paradiso massif (western Alps), the boundary between the Erfaulet orthogneiss and the overlying metasediments (Money Complex) is interpreted as a Late Palaeozoic intrusive contact. Major arguments in favour of this hypothesis are: (i) the obliquity of the sedimentary layering with respect to the contact; (ii) the presence of aplitic dykes within the Money Complex; (iii) the lack of a mylonitic zone; and (iv) rare relics of an early generation of garnet in the Money metasediments, interpreted as evidence of the contact metamorphism of the Erfaulet granite. To cite this article: B. Le Bayon, M. Ballèvre, C. R. Geoscience 336 (2004). |
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Keywords: | Gran Paradiso Erfaulet orthogneiss contact metamorphism garnet zonation Gran Paradiso orthogneiss de l'Erfaulet métamorphisme de contact zonation du grenat |
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