Nouvelle interprétation structurale de la « faille Nord- Pyrénéenne » en vallée d'Aspe (Pyrénées-Atlantiques). Remise en question d'un plutonisme ophitique danien dans le secteur de Bedous |
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Authors: | Joseph Canérot Claude Majesté-Menjoulas Yves Ternet |
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Institution: | 1. Laboratoire des mécanismes et transferts en géologie (LMTG), UMR UPS–CNRS n°5563, 39, allées Jules-Guesde, 31400 Toulouse cedex 04, France;2. 32, place Clemenceau, 65200 Bagnères-de-Bigorre, France |
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Abstract: | In the Aspe Valley (western Pyrenees), the Europe/Iberia boundary corresponds to a complex fracturing zone, called the ‘Bielle–Accous Wrench-Faulting Corridor’, which represents the classical ‘North-Pyrenean Fault’. Located between the High Primary Range and the North-Pyrenean Zone, the BAWC shows different south-verging sheets mainly composed of Triassic materials. The Bedous ophite, associated with Muschelkalk and Keuper sediments, is also Triassic in age and involved in the same Pyrenean thrusting structures. So, contrary to a recent interpretation, this magmatic rock cannot be related to a supposed Danian plutonism inducing metamorphic processes in the surrounding Mesozoic formations. To cite this article: J. Canérot et al., C. R. Geoscience 336 (2004). |
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Keywords: | faille Nord-Pyrénéenne décrochement ophites vallée d'Aspe Pyrénées occidentales North-Pyrenean Fault wrench-faulting ophites Aspe Valley western Pyrenees |
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