What magnetic markers tell us about ductile deformation in the Ordovician of the Iberian Chain?
DOI:
https://doi.org/10.55407/geogaceta108641Keywords:
magnetic fabric, paleomagnetism, rock magnetism, ordovician, aragonese branchAbstract
A magnetic fabric and paleomagnetic study together with a rock magnetic study have been carried out in two sites of Ordovician rocks affected by the Variscan Orogeny in the surroundings of Cerveruela village, in the Aragonese Branch of the Iberian Chain. The results of the magnetic fabric indicate different behavior according to sampled lithology and/or structural position within the fold. However, the paleomagnetic information is not well registered or it has been modified by later tectonic events. The remanence carriers are of low coercivity (magnetite) in the shaly rocks and of high coercivity (hematite) in the silty rocks. In both sites there are ferromagnetic iron sulphides with medium coercivity.
References
Allmendinger, R.W., Cardozo, N. y Fisher, D.M. (2011). Structural geology algorithms: Vectors and tensors. Cambridge University Press, Cambridge. https://doi.org/10.1017/CBO9780511920202
García-Sansegundo, J., Poblet, J., Alonso, J.L. y Clariana, P (2011). Geological Society of London, Special Publications 349, 169-184. https://doi.org/10.1144/SP349.9
Gozalo, R. y Liñán, E. (1988). Estudios geológicos 44(5-6), 399-404. https://doi.org/10.3989/egeol.88445-6556
Gutiérrez-Marco, J.C., Piçarra, J.M., Meireles, C.A., Cózar, P., García-Bellido, D.C., Pereira, Z., ... y Gómez-Barreiro, J. (2019). The Geology of Iberia: A Geodynamic Approach: Volume 2: The Variscan Cycle, 75-98. https://doi.org/10.1007/978-3-030-10519-8_3
Jelinek, V. (1977). The statistical theory of measuring anisotropy of magnetic susceptibility of rocks and its application. Geofyzica, Brno, 88 p.
Lowrie, W. (1990). Geophysical Research Letters 17(2), 159-162. https://doi.org/10.1029/GL017i002p00159
Ramsay, J.G. (1967). Folding and Fracturing of Rocks. McGraw-Hill, New York, 568 p.
Tarling, D.H. y Rouda, F. (1993). The magnetic anisotropy of rocks. Chapman & Hall, London, 217 p.
Villas, E., Vennin, E. Jiménez-Sánchez, A., Álvaro, S. Zamora J.J. y Gutiérrez-Marco, J.C. (2011). Post-Symposium fieldtrip. 11th ISOS.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2025 Belén Oliva Urcia, Carlos L. Liesa
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Until the year 2023 the author assigned the copyright to the Sociedad Geológica de España, but from 2024 the author retains the copyright and grants the Sociedad Geológica de España the right of first publication and non-exclusive distribution of each article in all current or future media, while transferring, also non-exclusively, the commercial rights for the distribution of the printed version of Geogaceta. On the other hand, the articles, from the year 2023, are available simultaneously with their publication, under the Creative Commons CC BY-NC-SA 4.0 license, which allows copying, transforming the work, but if any transformation is distributed, the new work must be distributed under the same license, and never for commercial purposes, while acknowledging the authorship and original publication in GEOGACETA, so that the only role of copyright is to give authors control over the integrity of their works and the right to be properly acknowledged and cited.
