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Lithospheric delamination in the core of Pangea: Sm-Nd insights from the Iberian mantle

2011; Geological Society of America; Volume: 39; Issue: 2 Linguagem: Inglês

10.1130/g31468.1

1943-2682

Gabriel Gutiérrez‐Alonso, J. Brendan Murphy, Javier Fernández‐Suárez, Arlo Brandon Weil, M. Piedad Franco, Julián C. Rivas‐Gonzalo,

earthquake and tectonic studies

Research Article| February 01, 2011 Lithospheric delamination in the core of Pangea: Sm-Nd insights from the Iberian mantle Gabriel Gutiérrez-Alonso; Gabriel Gutiérrez-Alonso 1Departamento de Geología, Universidad de Salamanca, Salamanca 37008, Spain Search for other works by this author on: GSW Google Scholar J. Brendan Murphy; J. Brendan Murphy 2Department of Earth Sciences, St. Francis Xavier University, Antigonish, Nova Scotia B2G 2W5, Canada Search for other works by this author on: GSW Google Scholar Javier Fernández-Suárez; Javier Fernández-Suárez 3Departamento de Petrología y Geoquímica, Universidad Complutense and IGE-CSIC (Instituto de Geología Económica, Consejo Superior de Investigaciones Científicas), Madrid 28040, Spain Search for other works by this author on: GSW Google Scholar Arlo B. Weil; Arlo B. Weil 4Department of Geology, Bryn Mawr College, Bryn Mawr, Pennsylvania 19010, USA Search for other works by this author on: GSW Google Scholar M. Piedad Franco; M. Piedad Franco 1Departamento de Geología, Universidad de Salamanca, Salamanca 37008, Spain Search for other works by this author on: GSW Google Scholar J. Carlos Gonzalo J. Carlos Gonzalo 1Departamento de Geología, Universidad de Salamanca, Salamanca 37008, Spain Search for other works by this author on: GSW Google Scholar Geology (2011) 39 (2): 155–158. https://doi.org/10.1130/G31468.1 Article history received: 11 Jun 2010 rev-recd: 14 Sep 2010 accepted: 19 Sep 2010 first online: 09 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 Gabriel Gutiérrez-Alonso, J. Brendan Murphy, Javier Fernández-Suárez, Arlo B. Weil, M. Piedad Franco, J. Carlos Gonzalo; Lithospheric delamination in the core of Pangea: Sm-Nd insights from the Iberian mantle. Geology 2011;; 39 (2): 155–158. doi: https://doi.org/10.1130/G31468.1 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 SocietyGeology Search Advanced Search Abstract Delamination of continental lithosphere in the core of active collisional orogens is a well-established process; however, evidence for its occurrence in ancient orogenic belts is less obvious. The contrasting Sm-Nd isotopic signature between pre– and post–Middle Permian mantle-derived mafic rocks from under the Iberian Massif suggests that most, but not all, of the subcontinental lithospheric mantle (SCLM) was replaced in latest Carboniferous to Permian time. Mantle replacement happened during and after the bending of the Variscan orogenic belt into the horseshoe-shaped Iberian-Armorican orocline. Delamination of thickened continental lithosphere in the core of the orocline triggered replacement of the ancient SCLM, thereby providing an explanation for the contrasting Sm-Nd isotopic characteristics of pre– and post–Middle Permian mafic rocks. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.