Triassic stretching directions in Iberia and North Africa inferred from magnetic fabrics
| Autor: | José Carlos Kullberg, Hamidou El‐Ouardi, Alfonso Sopeña, Ann M. Hirt, Esther Izquierdo-Llavall, Antonio M. Casas-Sainz, Ruth Soto, Cristina García-Lasanta, S. Torres-López, Teresa Román-Berdiel, Juan José Villalaín, Y. Sánchez-Moya, Inmaculada Gil-Peña, Bennacer Moussaid, Belén Oliva-Urcia |
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| Přispěvatelé: | Oficina de Proyectos de Zaragoza. Instituto Geológico y Minero de España, Laboratoire des Fluides Complexes et leurs Réservoirs (LFCR), Centre National de la Recherche Scientifique (CNRS)-Université de Pau et des Pays de l'Adour (UPPA)-TOTAL FINA ELF, Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich) |
| Rok vydání: | 2019 |
| Předmět: |
Extensional deformation
Rift 010504 meteorology & atmospheric sciences [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Transtension Geology North africa Classification of discontinuities 010502 geochemistry & geophysics 01 natural sciences Tectonics Paleontology Lineation Sinistral and dextral ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences |
| Zdroj: | Zaguán: Repositorio Digital de la Universidad de Zaragoza Universidad de Zaragoza Terra Nova Terra Nova, Wiley-Blackwell, 2019, 31 (5), pp.465-478. ⟨10.1111/ter.12416⟩ Zaguán. Repositorio Digital de la Universidad de Zaragoza instname |
| ISSN: | 0954-4879 1365-3121 |
| DOI: | 10.1111/ter.12416⟩ |
| Popis: | During the Triassic, Iberia and western North Africa displayed a unique situation in relation with the Central and North Atlantic opening and westward expansion of the Tethys. Unravelling the stretching direction in Triassic deposits of the studied area can help in our understanding of this scenario. The tectonic setting is characterized by localized basins with strong thickness variations greatly influenced by previous post-Variscan mechanical discontinuities. In this work, we revise and compile magnetic fabric data from eight Triassic depocentres in terms of defining the stretching direction (i.e. magnetic lineation), resulting from extensional deformation of this period. Data show the importance of the opening of the Atlantic rift as the leading process during the Triassic. Dextral transtension can explain the deflection of the extensional direction observed in most studied depocentres that is caused by the activity of previous major oblique faults. |
| Databáze: | OpenAIRE |
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