A Paleomagnetic Inspection of the Paleocene-Eocene Thermal Maximum (PETM) in the Southern Pyrenees
EntityUAM. Departamento de Geología y Geoquímica
10.3389/feart.2018.00202Frontiers in Earth Sciences 6 (2018): 202
Funded byThanks for the financial support from the Autonomous Organism of National Parks for the project 074/2006 (Principal Researcher A. Robador) and the Sobrarbe Geopark (now Sobrarbe-Pyrenees UNESCO World Geopark) for their financial support to the MAXTERMAG project. Reviewers are acknowledged for their detailed and helpful comments that contributed to improve the first version of the manuscript. Editor L. Jovane is acknowledged for helping in the handling of the manuscript
SubjectsPaleomagnetism; Magnetic signal; Magnetic minerals; Pyrenees; Remagnetization; Geología
Rights© 2018 Oliva-Urcia, Gil-Peña, Samsó, Soto and Rosales. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms
Esta obra está bajo una Licencia Creative Commons Atribución 4.0 Internacional.
Magnetic properties of rocks can be useful for determining paleoenvironmental changes. A dramatic climate change that occurred in the Paleocene-Eocene Thermal Maximum (PETM) modified the environment and, hence, the magnetic properties recorded in the sediments. New paleomagnetic data from marine records of the PETM in the Southern Pyrenean zone displays a variation of the magnetic parameters in four different sections. The magnetic signal reveals a positive excursion of magnetic values starting before the onset of the marly interval of La Faja de las Flores Mb (beginning of the PETM record, Ilerdian) in the Carriata section with a maximum value in the marly interval. A similar magnetic signal is observed in the Bujaruelo section (~10 km south of Carriata at PETM times) that is related directly to the marly interval of Faja de las Flores Mb. However, towards the south, the PETM interval does not appear in the sedimentary record; therefore, in the southern Gallisué section, no magnetic excursion occurs. In the southernmost-studied Entremón section, a positive magnetic excursion occurs in a thin marly interval unrelated to the PETM, and in two lower intervals of the column. All sections were later subjected to deformation during the pyrean orogeny and the three northernmost sections in the regional cleavage front, where pressure solution and remagnetizations have been described. A post-folding remagnetization component is found in the three northern sections
Google Scholar:Oliva Urcia, Belén - Gil-Peña, Inmaculada - Samsó, José M. - Soto, Ruth - Rosales, Idoia
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