Lyell Collection
Journal of the Geological Society
Lyell Centre  |   Lyell Collection  |   Subscriptions   |   Geological Society  |   Email alerts  |   Online bookshop  |   Help

Keywords:
Author:
Advanced search>>
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow Request Permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via ISI Web of Science (10)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by EVANS, N. G.
Right arrow Articles by BOUCHEZ, J. L.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation
Journal of the Geological Society; 1998; v. 155; issue.1; p. 209-216;
DOI: 10.1144/gsjgs.155.1.0209
© 1998 Geological Society of London

Article

Syntectonic emplacement of the Maladeta granite (Pyrenees) deduced from relationships between Hercynian deformation and contact metamorphism

N. G. EVANS1, G. GLEIZES2, D. LEBLANC2 & J. L. BOUCHEZ2

1 Salt Tectonics group, Royal Holloway, University of London, Egham, Surrey TW20 0EX, UK
2 Laboratoire de Pétrophysique, UMR 5563 CNRS, Université Paul-Sabatier, 38 rue des 36-Ponts, 31400 Toulouse, France (email: gleizes{at}lucid.ups-tise.fr)

The relationships between Hercynian deformation and contact metamorphism in the aureole of the Aneto unit, a constituent pluton of the Maladeta granite complex (Spanish Pyrenees), provide new data relevant to the controversy between the syn- and post-tectonic models of emplacement for the Pyrenean granites. The deformation in the Aneto aureole is related to two superimposed Hercynian episodes. The first was a ‘top to the SW’ thrusting which induced SW-verging recumbent folds. The second, which was essentially compressive in the Aneto area, is represented by E–W-trending subvertical cleavage and folds with subhorizontal axes. This second episode can be assigned to the D2 main Hercynian tectonic event of the Pyrenees. The contact metamorphic assemblages grew during the D2 event and were deformed by it close to the contact. The conclusion that the pluton was emplaced during D2 is strengthened by the structural and kinematic similarities between the magmatic deformation in the southern rim of the pluton and the D2 deformation in the country rocks. This syntectonic timing is supported by new geochronological data that conflict with an existing Rb–Sr post-tectonic Permian whole-rock age for the Maladeta granite. More generally, in accordance with some very recent structural and U–Pb zircon studies, our results contradict the geodynamical models of the Pyrenees which relate the granite intrusions to a late extensional event.

Key Words: Pyrenees • Hercynian Orogeny • deformation • contact metamorphism




This article has been cited by other articles:


Home page
 Geological Society, London, Special PublicationsHome page
J. Carreras, E. Druguet, A. Griera, and J. Soldevila
Strain and deformation history in a syntectonic pluton. The case of the Roses granodiorite (Cap de Creus, Eastern Pyrenees)
Geological Society, London, Special Publications, 2004; 224: 307 - 319.
[Abstract] [PDF]

Home page
 Geological MagazineHome page
J. E. Mezger, J. E. MEZGER, and C. W. PASSCHIER
Polymetamorphism and ductile deformation of staurolite-cordierite schist of the Bossost dome: indication for Variscan extension in the Axial Zone of the central Pyrenees
Geological Magazine, 2003; 140: 595 - 612.
[Abstract] [Full Text] [PDF]

Home page
 J PetrologyHome page
M. P. ROBERTS, C. PIN, J. D. CLEMENS, and J.-L. PAQUETTE
Petrogenesis of Mafic to Felsic Plutonic Rock Associations: the Calc-alkaline Querigut Complex, French Pyrenees
J. Petrology, 2000; 41: 809 - 844.
[Abstract] [Full Text] [PDF]

Home page
 Journal of the Geological SocietyHome page
Discussion on syntectonic emplacement of the Maladeta granite (Pyrenees) deduced from relationships between Hercynian deformation and contact metamorphism
Journal of the Geological Society, 1999; 156: 651 - 652.
[Abstract] [PDF]

Home page
 Geological Society, London, Special PublicationsHome page
G. Gleizes, D. Leblanc, and J. L. Bouchez
The main phase of the Hercynian orogeny in the Pyrenees is a dextral transpression
Geological Society, London, Special Publications, 1998; 135: 267 - 273.
[Abstract] [PDF]