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https://doi.org/10.5194/se-2020-51
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/se-2020-51
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: review article 16 Apr 2020

Submitted as: review article | 16 Apr 2020

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A revised version of this preprint is currently under review for the journal SE.

The enigmatic curvature of Central Iberia and its puzzling kinematics

Daniel Pastor-Galán1,2,3, Gabriel Gutiérrez-Alonso4,5, and Arlo B. Weil6 Daniel Pastor-Galán et al.
  • 1Frontier Research Institute for Interdisciplinary Sciences, Tohoku University
  • 2Department of Earth Science, Tohoku University
  • 3Center for Northeast Asian Studies, Tohoku University, 41 Kawauchi, Aoba-ku, Sendai, 980- 8576, Japan
  • 4Dept. of Geology. Faculty of Sciences. University of Salamanca. Plaza de la Merced s/n. 38007, Salamanca, Spain
  • 5Geology and Geography Department, Tomsk State University, Lenin Street, 36, Tomsk 634050, Russia
  • 6Department of Geology, Bryn Mawr College, PA 19010, USA

Abstract. The collision between Gondwana and Laurussia that formed the latest supercontinent, Pangea, occurred during Devonian to Early Permian times and resulted in large-scale orogeny that today transects Europe, northwest Africa and eastern North America. This orogen is characterized by an S shape corrugated geometry in Iberia. The northern curve of the corrugation is the well known and studied Cantabrian (or Ibero-Armorican) Orocline and is convex to the east and towards the hinterland. Largely ignored for decades, the geometry and kinematics of the southern curvature, known as the Central Iberian curve, are still ambiguous and hotly debated. Despite the paucity of data, the enigmatic Central Iberian curvature has inspired a variety of kinematic models that attempt to explain its formation with little consensus. This paper presents the advances and milestones in our understanding of the geometry and kinematics of the Central Iberian curve from the last decade, with particular attention to structural and paleomagnetic studies.

When combined, the currently available datasets suggest that the Central Iberian curve did not undergo regional differential vertical-axis rotations during or after the latest stages of the Variscan orogeny, and did not form as the consequence of a single process. Instead, its core is likely a primary curve (i.e. inherited from previous physiographic features of the crust) whereas the curvature in areas outside the core are dominated by folding interference during the Variscan orogeny or more recent Cenozoic (Alpine) tectonics.

Daniel Pastor-Galán et al.

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Short summary
Pangea assembled during Devonian to Early Permian times and resulted in large-scale and winding orogeny that today transects Europe, northwest Africa and eastern North America. This orogen is characterized by an S shape corrugated geometry in Iberia. This paper presents the advances and milestones in our understanding of the geometry and kinematics of the Central Iberian curve from the last decade, with particular attention to structural and paleomagnetic studies.
Pangea assembled during Devonian to Early Permian times and resulted in large-scale and winding...
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