Title: Late tectonic and metamorphic evolution of the Piedmont accretionary wedge (Queyras Schistes lustrés, western Alps): Evidences for tilting during Alpine collision
Abstract: Research Article| March 01, 2009 Late tectonic and metamorphic evolution of the Piedmont accretionary wedge (Queyras Schistes lustrés, western Alps): Evidences for tilting during Alpine collision Stéphane Schwartz; Stéphane Schwartz † 1Laboratoire de Géophysique Interne et Tectonophysique, Université Grenoble 1, CNRS/UJF, F-38041 Grenoble, Cedex 9, France †E-mail: [email protected] Search for other works by this author on: GSW Google Scholar Pierre Tricart; Pierre Tricart 2Laboratoire de Géodynamique des Chaînes Alpines, Université Grenoble 1, CNRS/UJF, F-38041 Grenoble, Cedex 9, France Search for other works by this author on: GSW Google Scholar Jean-Marc Lardeaux; Jean-Marc Lardeaux 3Géosciences Azur, Université de Nice Sophia Antipolis, CNRS, F-06108 Nice, Cedex 02, France Search for other works by this author on: GSW Google Scholar Stéphane Guillot; Stéphane Guillot 4LGCA, Université Grenoble 1, CNRS/UJF, F-38041 Grenoble, Cedex 9, France Search for other works by this author on: GSW Google Scholar Olivier Vidal Olivier Vidal 4LGCA, Université Grenoble 1, CNRS/UJF, F-38041 Grenoble, Cedex 9, France Search for other works by this author on: GSW Google Scholar GSA Bulletin (2009) 121 (3-4): 502–518. https://doi.org/10.1130/B26223.1 Article history received: 13 Mar 2007 rev-recd: 29 Apr 2008 accepted: 05 May 2008 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Stéphane Schwartz, Pierre Tricart, Jean-Marc Lardeaux, Stéphane Guillot, Olivier Vidal; Late tectonic and metamorphic evolution of the Piedmont accretionary wedge (Queyras Schistes lustrés, western Alps): Evidences for tilting during Alpine collision. GSA Bulletin 2009;; 121 (3-4): 502–518. doi: https://doi.org/10.1130/B26223.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract This paper addresses the contribution of extension in the upper crust during syncollisional exhumation of subducted material. We present structural data based on the analysis of ductile, brittle-ductile, and brittle deformation features in metapelitic schists and meta-basalts from the Schistes lustrés nappe stack in the Piedmont zone of the western Alps. To link the structures with synkinematic pressure and temperature estimates, geothermobarometry was performed using fluid inclusion investigation in quartz together with temperature estimations based on metamorphic chlorite composition. Samples used for geothermobarometry were collected taking into account the structural framework within veins associated with extensional structures observed at the regional scale. The early generation of veins associated with boudinage occurred at 415–345 °C and 6–2.5 kbar, and subsequent incipient normal faulting occurred at temperatures of 315–235 °C and pressures <1.7 kbar. The transition from ductile to brittle extension occurred between ca. 27 Ma and ca. 10 Ma. These results indicate a continuous extension in the upper crust during exhumation and continuous deformation associated with regional-scale tilting of the exhumed Schistes lustrés tectonic pile. The extensional tectonic regime in greenschistfacies conditions remains active today in most of the internal Alpine zones as the Alpine collision continues. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Publication Year: 2009
Publication Date: 2009-02-05
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 38
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