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<title lang=en>Constraints on the crustal structure of the internal Variscan Belt in SW Europe: A magnetotelluric transect along the eastern part of Central Iberian Zone, Iberian Massif</title>
<creator>Pous, Jaume</creator>
<creator>Martinez Poyatos, David</creator>
<creator>Heise, Wiebke</creator>
<creator>Santos, Fernando Monteiro</creator>
<creator>Galindo-Zaldivar, Jesus</creator>
<creator>Ibarra, Pedro</creator>
<creator>Pedrera, Antonio</creator>
<creator>RUIZ-CONSTAN, Ana</creator>
<creator>Anahnah, Farida</creator>
<creator>Goncalves, Rui</creator>
<creator>Mateus, Antonio</creator>
<contributor>Departament de Geodinàmica i Geofísica [Barcelona] ; Universitat de Barcelona (UB)</contributor>
<contributor>Departamento de Geodinámica, Universidad de Granada ; Université du Québec</contributor>
<contributor>Facultade de Ciencias da Universidade de Lisboa ; Université du Québec</contributor>
<contributor>Instituto Geológico y Minero de España (IGME)</contributor>
<contributor>Manteau et Interfaces ; Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS) - Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Instituto Politécnico de Tomar ; Université du Québec</contributor>
<contributor>Departamento de Geologia and CeGUL, FaculdadUniversidade de Lisboa ; Université du Québec</contributor>
<description>International audience</description>
<source>ISSN: 0148-0227</source>
<source>EISSN: 2156-2202</source>
<source>Journal of Geophysical Research</source>
<publisher>American Geophysical Union</publisher>
<identifier>hal-00671036</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00671036</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00671036</source>
<source>Journal of Geophysical Research, American Geophysical Union, 2011, 116, pp.B02103. 〈10.1029/2010JB007538〉</source>
<identifier>DOI : 10.1029/2010JB007538</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1029/2010JB007538</relation>
<language>en</language>
<subject lang=en>electrical resistivity</subject>
<subject lang=en>magnetotellurics</subject>
<subject lang=en>Central Iberian Zone</subject>
<subject lang=en>crustal structure</subject>
<subject lang=en>Variscan Belt</subject>
<subject lang=en>conductive middle to lower crust</subject>
<subject>[SDU.STU.TE] Sciences of the Universe [physics]/Earth Sciences/Tectonics</subject>
<subject>[SDE.MCG] Environmental Sciences/Global Changes</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>The Iberian Massif is the best exposed segment of the European Variscan Belt. It includes relatively well preserved terranes that were accreted by transpression along time and resulted in a number of geotectonic units that formed part of the Late Paleozoic assembly of the Pangaea Supercontinent. In SW Iberia, these units are the Central Iberian Zone (CIZ), Ossa Morena Zone (OMZ), and the South Portuguese Zone (SPZ). A 210 km long NE-SW magnetotelluric profile was carried out through the CIZ, from the OMZ-CIZ boundary toward the north, reaching the Tagus (Cenozoic) basin. Data dimensionality analysis resulted in a suitable 2-D electrical resistivity structure, allowing a 2-D inversion of the data set. Complementary available geophysical data (deep seismic, gravity and aeromagnetic) and a comparison with a detailed geological cross section led us to constrain the interpretation of the 2-D electrical resistivity structure of the CIZ crust. The results show, for the upper crust, the existence of diverse conductive/resistive bodies that correlate well with known geological features (sedimentary basins, faults, granitic plutons, mineralized systems). A mild but steady conductive band is located along the middle and lower crust that is interpreted as a mafic granulite basement. The upper section of this band connects with several elongated shallow conductors, providing further evidence for the existence, in the Central Iberian Zone, of a complex decollement system where the major faults are rooted. Such a crustal architecture is viewed as the northward continuation of the Variscan large-scale structures previously recognized in the southern sectors (OMZ and SPZ).</description>
<date>2011</date>
</dc>
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