Triassic stretching directions in Iberia and North Africa inferred from magnetic fabrics

Soto, Ruth ; Casas-Sainz, Antonio M. (Universidad de Zaragoza) ; Oliva-Urcia, Belén ; García-Lasanta, Cristina ; Izquierdo-Llavall, Esther (Universidad de Zaragoza) ; Moussaid, Bennacer ; Kullberg, José Carlos ; Román-Berdiel, Teresa (Universidad de Zaragoza) ; Sánchez-Moya, Yolanda ; Sopeña, Alfonso ; Torres López, Sara ; Villalaín, Juan José (Universidad de Zaragoza) ; El-Ouardi, Hamidou ; Gil-Peña, Inmaculada ; Hirt, Ann M.

Resumen: 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.

Idioma: Inglés

DOI: 10.1111/ter.12416

Año: 2019

Publicado en: TERRA NOVA 31, 5 (2019), 465-478
ISSN: 0954-4879

Factor impacto JCR: 2.734 (2019)

Categ. JCR: GEOSCIENCES, MULTIDISCIPLINARY rank: 73 / 198 = 0.369 (2019) - Q2 - T2

Factor impacto SCIMAGO: 1.25 - Geology (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E01-17R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/CGL2016-77560-C2-1-P
Financiación: info:eu-repo/grantAgreement/ES/MINECO/CGL2016-77560-C2-2-P

Tipo y forma: Artículo (PostPrint)

Área (Departamento): Área Geodinámica Interna (Dpto. Ciencias de la Tierra)