RT Journal Article
T1 Contrasting chemical and isotopic signatures from Neoproterozoicmetasedimentary rocks in the Central Iberian Zone (Spain) ofpre-Variscan Europe: Implications for terrane analysis and EarlyOrdovician magmatic belts
A1 Villaseca González, Carlos
A1 Merino Martínez, Enrique
A1 Oyarzun Muñoz, Roberto
A1 Orejana García, David
A1 Pérez-Soba Aguilar, Cecilia María
A1 Chicharro Álvarez, Eva
AB Neoproterozoic metasedimentary units from central Spain and the northern Central Iberian Zone (CIZ) show distinctive geochemical signatures with respect to the Schist-Greywacke Complex, which is dominant in the southwestern part of the CIZ. Significant differences occur in major and trace element composition and initial Nd isotope ratios, which cannot be explained in terms of metamorphic grade and/or anatexis in some layers of these metasedimentary sequences. ɛNd540 values from metapelites of central Spain range from −5.6 to −10.4 whereas those from the Schist-Greywacke Complex span a narrower and higher range of −0.8 to −3.1. This difference suggests different source regions. The presence of two contrasting Early Ordovician magmatic belts in both subzones reinforces the idea of different Precambrian basement terranes in the CIZ. These data are crucial for pre-Variscan paleogeographic reconstructions of the westernmost European terranes and for checking the validity of current subdivisions of the Iberian Massif.
PB Elsevier
SN 0301-9268
YR 2014
FD 2014
LK https://hdl.handle.net/20.500.14352/34264
UL https://hdl.handle.net/20.500.14352/34264
LA eng
NO Ministerio de Economía y Competitividad  (MINECO)
NO Universidad Complutense de Madrid
DS Docta Complutense
RD 10 abr 2025