What the magnetic information in sedimentary and igneous rocks tell us about the kinematics of the Pyrenean Axial Zone?

Authors

  • Belén Oliva Urcia Grupo GEOtransfer, Departamento de Ciencias de la Tierra, Facultad de Ciencias, Instituto de Investigación en Ciencias Ambientales (IUCA), Universidad de Zaragoza
  • Emilio Pueyo Morer IGME, CSIC, Unidad de Zaragoza
  • Andrés Gil Imaz Grupo GEOtransfer, Departamento de Ciencias de la Tierra, Facultad de Ciencias, Instituto de Investigación en Ciencias Ambientales (IUCA), Universidad de Zaragoza
  • Inmaculada Gil Peña IGME, CSIC, Ríos Rosas, Madrid
  • Stéphane Brusset Géosciences-Environment, Université Toulouse III-Paul Sabatier
  • Pierre Souquet Geólogo consultor, Toulouse
  • José Ignacio Valenzuela Departamento de Geología, Universidad de Valencia
  • Jau-Chyn Liao Departamento de Geodinámica, Estratigrafía y Paleontología, Universidad Complutense de Madrid

DOI:

https://doi.org/10.55407/geogaceta108695

Keywords:

devonian, ophites, peridotites, axial zone, paleomagnetism

Abstract

Paleomagnetic information is presented of the Devonian rocks of the Axial Zone in its western part (Aspe valley) and central part (around Laspaúles and Orri Dome), as well as Permian igneous rocks from the Anayet Massif, Triassic ophites and Mesozoic peridotites near the North Pyrenean Fault, and Upper Cretaceous rocks just South of the North Pyrenean Fault. Results suggest remagnetizations in the Devonian rocks. Samples in the basaltic sills of Anayet suggest the presence of a post-magnetization tilting because the paleomagnetic inclination is larger than expected. The results from ophites are quite homogeneous and show a paleomagnetic direction similar to the postfolding remagnetization described previously in the Internal Sierras. However, peridotites show a variable magnetization with different paleomagnetic directions. These results open local reconstructions of bedding at the time of remagnetization, when it is isochcronous.

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Published

2025-06-20

How to Cite

Oliva Urcia, B., Pueyo Morer, E., Gil Imaz, A., Gil Peña, I., Brusset, S., Souquet, P., … Liao, J.-C. (2025). What the magnetic information in sedimentary and igneous rocks tell us about the kinematics of the Pyrenean Axial Zone?. GEOGACETA, 77, 91–94. https://doi.org/10.55407/geogaceta108695

Issue

Vol. 77 (2025): January-June

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Artículos

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Copyright (c) 2025 Belén Oliva Urcia, Emilio Pueyo Morer, Andrés Gil Imaz, Inmaculada Gil Peña, Stéphane Brusset, Pierre Souquet, José Ignacio Valenzuela, Jau-Chyn Liao

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