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Book Chapter

Age of the magmatism related to the inverted Stephanian–Permian basin of the Sallent area (Pyrenees)

By
Lidia Rodríguez-Méndez
Lidia Rodríguez-Méndez
1
Departamento de Geodinámica, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, Apartado 644, 48080 Bilbao, Spain
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;
Julia Cuevas
Julia Cuevas
1
Departamento de Geodinámica, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, Apartado 644, 48080 Bilbao, Spain
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;
José Julián Esteban
José Julián Esteban
1
Departamento de Geodinámica, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, Apartado 644, 48080 Bilbao, Spain
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;
José M. Tubía
José M. Tubía
1
Departamento de Geodinámica, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, Apartado 644, 48080 Bilbao, Spain
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Sergei Sergeev
Sergei Sergeev
2
Centre of Isotopic Research, VSEGEI, 199106 St Petersburg, Russia
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;
Alexander Larionov
Alexander Larionov
2
Centre of Isotopic Research, VSEGEI, 199106 St Petersburg, Russia
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Published:
January 01, 2014

Abstract

We have dated an alkaline diabase dyke from the Axial Zone of the Pyrenees near the village of Sallent (Spain), using a sensitive high-resolution ion microprobe (SHRIMP). The diabase dyke intrudes into Devonian rocks that constitute the basement of an inverted Stephanian–Permian basin. Five U–Pb analyses of zircon yield a concordant age of 259.2±3.2 Ma (2σ) for the intrusion of the dyke. This age links diabase dykes with the magmatism associated with the opening of the Stephanian–Permian basins scattered along the Pyrenees. Previous data from the largest Anayet and Midi d'Ossau volcanic massifs, located to the NW of the studied dyke, indicate that the Permian magmatism develops from late Autunian/early Saxonian to Wordian ages. Consequently, this new age broadens the time span of the Permian magmatism of the Pyrenees. The work relates the structure of the Stephanian–Permian basin and the magmatism in order to explain the transition to the new geodynamic setting prevailing in the Pyrenees during the Mesozoic.

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Geological Society, London, Special Publications

Deformation Structures and Processes within the Continental Crust

S. Llana-Fúnez
S. Llana-Fúnez
Universidad de Oviedo, Spain
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A. Marcos
A. Marcos
Universidad de Oviedo, Spain
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F. Bastida
F. Bastida
Universidad de Oviedo, Spain
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Geological Society of London
Volume
394
ISBN electronic:
9781862396708
Publication date:
January 01, 2014

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