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Deep deformation pattern from electrical anisotropy in an arched orogen (Betic Cordillera, western Mediterranean)

2010; Geological Society of America; Volume: 38; Issue: 8 Linguagem: Inglês

10.1130/g31144.1

1943-2682

Ana Ruiz‐Constán, Jesús Galindo-Zaldı́var, Antonio Pedrera, Jorge A. Arzate, J. Pous, Farida Anahnah, Wiebke Heise, Fernando A. Monteiro Santos, Carlos Marín‐Lechado,

Geological and Tectonic Studies in Latin America

Research Article| August 01, 2010 Deep deformation pattern from electrical anisotropy in an arched orogen (Betic Cordillera, western Mediterranean) Ana Ruiz-Constán; Ana Ruiz-Constán * 1Departamento de Geodinámica, Universidad de Granada, Granada, Spain *E-mail: aconstan@ugr.es. Search for other works by this author on: GSW Google Scholar Jesús Galindo-Zaldivar; Jesús Galindo-Zaldivar 1Departamento de Geodinámica, Universidad de Granada, Granada, Spain2Instituto Andaluz de Ciencias de la Tierra, CSIC-Universidad de Granada, Granada, Spain Search for other works by this author on: GSW Google Scholar Antonio Pedrera; Antonio Pedrera 3Instituto Geológico y Minero de España, Granada, Spain Search for other works by this author on: GSW Google Scholar Jorge A. Arzate; Jorge A. Arzate 4Centro de Geosciencias, Universidad Nacional Autónoma de México, Querétaro, México Search for other works by this author on: GSW Google Scholar Jaume Pous; Jaume Pous 5Departament de Geodinàmica i Geofísica, Universitat de Barcelona, Barcelona, Spain Search for other works by this author on: GSW Google Scholar Farida Anahnah; Farida Anahnah 1Departamento de Geodinámica, Universidad de Granada, Granada, Spain Search for other works by this author on: GSW Google Scholar Wiebke Heise; Wiebke Heise 6Departamento de Física y Centro de Geofísica da Universidade de Lisboa, Lisbon, Portugal Search for other works by this author on: GSW Google Scholar Fernando A. Monteiro Santos; Fernando A. Monteiro Santos 6Departamento de Física y Centro de Geofísica da Universidade de Lisboa, Lisbon, Portugal Search for other works by this author on: GSW Google Scholar Carlos Marín-Lechado Carlos Marín-Lechado 3Instituto Geológico y Minero de España, Granada, Spain Search for other works by this author on: GSW Google Scholar Author and Article Information Ana Ruiz-Constán * 1Departamento de Geodinámica, Universidad de Granada, Granada, Spain Jesús Galindo-Zaldivar 1Departamento de Geodinámica, Universidad de Granada, Granada, Spain2Instituto Andaluz de Ciencias de la Tierra, CSIC-Universidad de Granada, Granada, Spain Antonio Pedrera 3Instituto Geológico y Minero de España, Granada, Spain Jorge A. Arzate 4Centro de Geosciencias, Universidad Nacional Autónoma de México, Querétaro, México Jaume Pous 5Departament de Geodinàmica i Geofísica, Universitat de Barcelona, Barcelona, Spain Farida Anahnah 1Departamento de Geodinámica, Universidad de Granada, Granada, Spain Wiebke Heise 6Departamento de Física y Centro de Geofísica da Universidade de Lisboa, Lisbon, Portugal Fernando A. Monteiro Santos 6Departamento de Física y Centro de Geofísica da Universidade de Lisboa, Lisbon, Portugal Carlos Marín-Lechado 3Instituto Geológico y Minero de España, Granada, Spain *E-mail: aconstan@ugr.es. Publisher: Geological Society of America Received: 23 Feb 2010 Revision Received: 12 Mar 2010 Accepted: 13 Mar 2010 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2010 Geological Society of America Geology (2010) 38 (8): 731–734. https://doi.org/10.1130/G31144.1 Article history Received: 23 Feb 2010 Revision Received: 12 Mar 2010 Accepted: 13 Mar 2010 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Ana Ruiz-Constán, Jesús Galindo-Zaldivar, Antonio Pedrera, Jorge A. Arzate, Jaume Pous, Farida Anahnah, Wiebke Heise, Fernando A. Monteiro Santos, Carlos Marín-Lechado; Deep deformation pattern from electrical anisotropy in an arched orogen (Betic Cordillera, western Mediterranean). Geology 2010;; 38 (8): 731–734. doi: https://doi.org/10.1130/G31144.1 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 Long-period magnetotelluric data acquired in the Iberian Massif and the Betic Cordillera arched orogen provide the first evidence of electrical anisotropy in the upper mantle of the Mediterranean region. Strike analysis at different periods reveals preferred structure orientation related to olivine elongation in the mantle, and points to a heterogeneous anisotropy pattern. At deep levels (periods ≥104 s), all the sites show a common north-south geoelectrical strike (∼N170°E), which may represent a low-intensity deformation, possibly related to "frozen" prealpine plate tectonics. For periods between 10 and 103 s, a north-south constant strike (∼N180°E) at the Betic Cordillera sites contrasts with the east-west strike (∼N85°E) in the Iberian Massif. An increase in the magnitude of the induction arrows from the Iberian Massif to the inner part of the Betic Cordillera probably reflects higher deformation toward the axis of the Eurasian-African plate boundary. The integration of electrical anisotropy data with seismic anisotropy allows us to discuss mantle deformation patterns produced by delamination and subduction, suggesting that the latter mechanism may be more suitable for the alpine evolution of the western Gibraltar Arc. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.