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Is there a time lag between the metamorphism and emplacement of plutons in the Axial Zone of the Pyrenees?

Published online by Cambridge University Press:  13 April 2015

J. J. ESTEBAN ,
A. ARANGUREN ,
J. CUEVAS ,
A. HILARIO ,
J. M. TUBÍA ,
A. LARIONOV  and
S. SERGEEV
J. J. ESTEBAN*
Affiliation:
Departamento de Geodinámica, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, apartado 644, 48080 Bilbao, Spain
A. ARANGUREN
Affiliation:
Departamento de Geodinámica, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, apartado 644, 48080 Bilbao, Spain
J. CUEVAS
Affiliation:
Departamento de Geodinámica, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, apartado 644, 48080 Bilbao, Spain
A. HILARIO
Affiliation:
Departamento de Geodinámica, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, apartado 644, 48080 Bilbao, Spain
J. M. TUBÍA
Affiliation:
Departamento de Geodinámica, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, apartado 644, 48080 Bilbao, Spain
A. LARIONOV
Affiliation:
Centre of Isotopic Research, VSEGEI, 199106 St Petersburg, Russia
S. SERGEEV
Affiliation:
Centre of Isotopic Research, VSEGEI, 199106 St Petersburg, Russia
*
† Author for correspondence: jj.esteban@ehu.es
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Abstract

Detailed petrographic and geochemical studies conducted on zircons from the Lys-Caillaouas pluton reveal their igneous and metamorphic affinities. The igneous zircons constrain the emplacement of the pluton to 300±2 Ma. By contrast, the metamorphic zircons yield an older age of 307±3 Ma, which probably dates the thermal peak of the HT/LP Variscan metamorphism. Therefore, a short time lag of c. 7 Ma emerges between the metamorphic climax and emplacement of the pluton in the Axial Zone (Pyrenees).

Keywords

PyreneesAxial ZoneLys-Caillaouas plutonU–Pb zircon SIMS

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Type
Rapid Communication
Information
Geological Magazine , Volume 152 , Issue 5 , September 2015 , pp. 935 - 941
Copyright
Copyright © Cambridge University Press 2015 

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