Paleomagnetism of the Central Iberian curve's putative hinge: Too many oroclines in the Iberian Variscides

Daniel Pastor-Galán, Mark J. Dekkers, Gabriel Gutiérrez-Alonso, Daniël Brouwer, Thomas Groenewegen, Wout Krijgsman, Javier Fernández-Lozano, Mariano Yenes, Fernando Álvarez-Lobato

研究成果: Article査読

27 被引用数 (Scopus)


The Variscan mountain belt in Iberia defines a large “S” shape with the Cantabrian Orocline in the north and the Central Iberian curve, an alleged orocline belt of opposite curvature, to the south. The Cantabrian Orocline is kinematically well constrained, but the geometry and kinematics of the Central Iberian curve are still controversial. Here, we investigate the kinematics of the Central Iberian curve, which plays an important role in the amalgamation of Pangea since it may have accommodated much of the post-collisional deformation. We have performed a paleomagnetic study on Carboniferous granitoids and Cambrian limestones within the hinge of the curve. Our paleomagnetic and rock magnetic results show a primary magnetization in the granitoids and a widespread Carboniferous remagnetization of the limestones. Syn-kinematic granitoids show ca. 70° counter-clockwise rotations consistent with the southern limb of the Cantabrian Orocline. Post-kinematic granitoids and Cambrian limestones show consistent inclinations but very scattered declinations suggesting that they were magnetized coevally to and after the ~ 70° rotation. Our results show no differential rotations between northern, southern limb and the hinge zone. Therefore, we discard a late Carboniferous oroclinal origin for the Central Iberian curve.

ジャーナルGondwana Research
出版ステータスPublished - 2016 11月 1

ASJC Scopus subject areas

  • 地質学


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