Along-strike variations of P-T conditions in accretionary wedges and syn-orogenic extension, the HP-LT Phyllite-Quartzite Nappe in Crete and the Peloponnese

Laurent Jolivet 1 F. Trotet 2 Patrick Monié 3 Olivier Vidal 4 Bruno Goffé 2 Loic Labrousse 5 Philippe Agard 5 B. Ghorbal 1
1 ISTO - Institut des Sciences de la Terre d'Orléans
2 LGE - Laboratoire de géologie de l'ENS
3 Géosciences Montpellier
4 LGCA - Laboratoire de Géodynamique des Chaines Alpines
5 iSTeP - Institut des Sciences de la Terre de Paris
Abstract : Syn-orogenic detachments in accretionary wedges make the exhumation of high-pressure and low-temperature metamorphic rocks possible with little erosion. The velocity of exhumation within the subduction channel or the accretionary complex, and thus the shape of P-T paths, depend upon the kinematic boundary conditions. A component of slab retreat tends to open the channel and facilitates the exhumation. We document the effect of slab retreat on the shape of P-T paths using the example of the Phyllite-Quartzite Nappe that has been exhumed below the Cretan syn-orogenic detachment during the Miocene in Crete and the Peloponnese. Data show a clear tendency toward colder conditions at peak pressure and during exhumation where the intensity of slab retreat is larger. This spatial evolution of P-T gradient is accompanied with an evolution from a partly coaxial regime below the Peloponnese section of the detachment toward a clearly non-coaxial regime in Crete.
Keywords : High pressure and low temperature metamorphic rocks Exhumation Slab retreat Detachment Crete Peloponnese
Document type :
Journal articles
Complete list of metadatas

Cited literature [88 references]  Display  Hide  Download
https://hal-insu.archives-ouvertes.fr/insu-00411771
Contributor : Pascale Talour <>
Submitted on : Friday, April 6, 2012 - 8:27:40 AM
Last modification on : Thursday, February 20, 2020 - 4:28:04 PM
Long-term archiving on: Saturday, July 7, 2012 - 2:20:10 AM

File

Jolivet-Tectonophysics-2010.pd...
Publisher files allowed on an open archive

Identifiers

Collections

CNRS | GM | UNIV-ORLEANS | ISTO | ISTEP | OSUG | OSUC | UNIV-SAVOIE | ENS-PARIS | INSU | UPMC | UGA | AGROPOLIS | IFSTTAR | IRD | ISTERRE | PSL | UNIV-AG | B3ESTE | UNIV-MONTPELLIER | UNIV-TOURS | SORBONNE-UNIVERSITE | SU-SCIENCES | IRSTEA

Citation

Laurent Jolivet, F. Trotet, Patrick Monié, Olivier Vidal, Bruno Goffé, et al.. Along-strike variations of P-T conditions in accretionary wedges and syn-orogenic extension, the HP-LT Phyllite-Quartzite Nappe in Crete and the Peloponnese. Tectonophysics, Elsevier, 2010, 480 (1-4), pp.133-148. ⟨10.1016/j.tecto.2009.10.002⟩. ⟨insu-00411771⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

785

Files downloads

1187

Contact

Informations

CCSD