TY - JOUR
T1 - New kinematic constraints on the Cantabrian orocline
T2 - A paleomagnetic study from the Peñalba and Truchas synclines, NW Spain
AU - Fernández-Lozano, Javier
AU - Pastor-Galán, Daniel
AU - Gutiérrez-Alonso, Gabriel
AU - Franco, Piedad
N1 - Funding Information:
This work has been funded by the Ministry of Economy and Competitiveness under the project ODRE III-Oroclines & Delamination: Relations & Effects ( CGL2013-46061-P ) and the Founding Program for Research Groups by the University of Salamanca . Funding for JFL comes from a contract under the Spanish Law of Science, established by the Junta de Castilla y León and the University of Salamanca. DPG is funded by ISES , The Netherlands. The authors wish to acknowledge the work of J. W. Geissman and an anonymous reviewer for their suggestions and help. We are indebted to Javier Fernández-Suárez for his comments and language improvements made on the original text. This work is a contribution to the IGCP projects no. 597 (Amalgamation and breakup of Pangea) and no. 648 (Supercontinent Cycle and Global Geodynamics).
Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2016/6/20
Y1 - 2016/6/20
N2 - The Cantabrian orocline is a large structure that bends the Variscan orogen of Western Europe in NW Iberia. The extensively studied kinematics of its core, the foreland of the orogen, indicates that the structure is secondary, i.e. acquired after the formation of the orogenic edifice. However, the extent of the Cantabrian orocline away from its core is under debate. In this paper we study the kinematics of the Cantabrian orocline beyond the foreland. We collected and analyzed samples from the northern and central parts of the Truchas syncline, which provides new data within the hinterland of the orogen in NW Iberia. The analysis of 320 samples shows a late Carboniferous remagnetization with an E to NE declination and shallow downward inclinations. These results suggest a counter-clockwise rotation of ~ 60° and peri-equatorial but still southern hemisphere latitude for Iberia during the uppermost Carboniferous–Early Permian. This rotation fits with the expected kinematic evolution of the Truchas syncline if it indeed was part of the Cantabrian orocline.
AB - The Cantabrian orocline is a large structure that bends the Variscan orogen of Western Europe in NW Iberia. The extensively studied kinematics of its core, the foreland of the orogen, indicates that the structure is secondary, i.e. acquired after the formation of the orogenic edifice. However, the extent of the Cantabrian orocline away from its core is under debate. In this paper we study the kinematics of the Cantabrian orocline beyond the foreland. We collected and analyzed samples from the northern and central parts of the Truchas syncline, which provides new data within the hinterland of the orogen in NW Iberia. The analysis of 320 samples shows a late Carboniferous remagnetization with an E to NE declination and shallow downward inclinations. These results suggest a counter-clockwise rotation of ~ 60° and peri-equatorial but still southern hemisphere latitude for Iberia during the uppermost Carboniferous–Early Permian. This rotation fits with the expected kinematic evolution of the Truchas syncline if it indeed was part of the Cantabrian orocline.
KW - Cantabrian arc
KW - Iberia
KW - Orocline
KW - Paleomagnetism
KW - Variscan
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U2 - 10.1016/j.tecto.2016.02.019
DO - 10.1016/j.tecto.2016.02.019
M3 - Article
AN - SCOPUS:84990063283
SN - 0040-1951
VL - 681
SP - 195
EP - 208
JO - Tectonophysics
JF - Tectonophysics
ER -