Academic Journal
Mapping the crustal structure beneath the eastern Pyrenees
| العنوان: | Mapping the crustal structure beneath the eastern Pyrenees |
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| المؤلفون: | Diaz, Jordi, Vergés, Jaume, J., Chevrot, Sébastien, Antonio-Vigil, Amanda, Ruiz, Mario, Sylvander, Matthieu, Gallart, Josep |
| المساهمون: | Consejo Superior de Investigaciones Cientificas España = Spanish National Research Council Spain (CSIC), Institute of Earth Sciences Jaume Almera, Géosciences Environnement Toulouse (GET), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS), INSTITUTO GEOFISICO AT THE ESCUELA POLITECNICA NACIONAL, Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Institute of Earth Science "JaumeAlmera", CSIC, Barcelona, Spain. |
| المصدر: | ISSN: 0040-1951. |
| بيانات النشر: | HAL CCSD Elsevier |
| سنة النشر: | 2018 |
| المجموعة: | Université Toulouse III - Paul Sabatier: HAL-UPS |
| مصطلحات موضوعية: | Crustal structure beneath eastern Pyrenees, Local events modelling, Geological interpretation of the results, Eastward limit of the crustal imbrication, Receiver function stacked sections, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
| الوصف: | International audience ; ARTICLE INFO Keywords: Crustal structure beneath eastern Pyrenees Receiver function stacked sections Local events modelling Geological interpretation of the results Eastward limit of the crustal imbrication ABSTRACT Two passive seismic profiles have been acquired in the eastern Pyrenees as part of the Pyrope and Orogen projects to investigate the crustal structure differences between this area and the central and western Pyrenees. Up to 28 broad-band stations were deployed along two orthogonal lines, with an interstation spacing close to 10 km. High frequency receiver functions allowed us to obtain the main lithospheric interfaces along those lines. The NNE-SSW profile shows a well-defined Moho beneath Iberia, slightly deepening northwards. Beneath the Axial zone the Moho appears to be segmented but does not show evidence of crustal imbrication. Further North, the Moho appears again as a continuous interface located around 30 km depth. This image clearly differs from the conspicuous imbrication between the Iberian and Eurasian crusts observed westward. The E-W profile shows a smooth Moho thinning from a 40 km depth to the west of the profile to 23 km close to the coastline, evidenc-ing the crustal thinning related to the Neogene extensional processes. Additional constraints on the geometry of the crust/mantle boundary in the Eastern Pyrenees are obtained from local moderate magnitude earthquakes recorded along the seismic lines during the experiment. In particular, a fan profile built from an event located near the Mediterranean coast suggests that crustal thickness differences between Iberian and Eurasian crusts can still be recognized 30 km westward of the Mediterranean coast, in an area that seems to mark the limit between regions dominated by compressive and extensive processes. We propose a model in which the observed dissimilar Moho structure beneath the Eastern Pyrenees is interpreted as the result of a different Mesozoic pre-shortening margin configuration. Seismic results are ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1016/j.tecto.2018.07.011 |
| الاتاحة: | https://hal.science/hal-02358173 https://hal.science/hal-02358173v1/document https://hal.science/hal-02358173v1/file/pagination_TECTO_127887.pdf https://doi.org/10.1016/j.tecto.2018.07.011 |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.4EE267EA |
| قاعدة البيانات: | BASE |
| DOI: | 10.1016/j.tecto.2018.07.011 |
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