The Late Triassic–Middle Jurassic Passive Margin Stage
- Juan José Gómez
- Roque Aguado
- Ana Cristina Azerêdo
- José Emilio Cortés
- Luís Vítor Duarte
- Luis O’Dogherty
- Cecilio Quesada Ochoa (coord.)
- José Tomás de Oliveira (coord.)
Publisher: Springer Suiza
ISBN: 978-3-030-11294-3
Year of publication: 2019
Pages: 113-167
Type: Book chapter
Abstract
During the Late Triassic-Middle Jurassic interval Iberia acted as a passive margin, where extensional or transtensional faulting, linked to the propagation of the Central Atlantic and the opening of the Ligurian Tethys, generated a NW and NE trending fault system that conditioned facies and thickness distribution. These faults also favored the implantation of mantle plumes and associated volcanism, giving rise to the evolution from a magma-poor passive margin, during the latest Triassic to the Pliensbachian, to a magma-rich passive margin, which developed from the Pliensbachian to the Bajocian. Progressive extensional faulting, that propagated from east to west reached a climax during the Toarcian, probably related to the onset of sea-floor spreading in the northern part of the Central Atlantic.