Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/133027
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Cambrian–early Ordovician volcanism across the South Armorican and Occitan domains of the Variscan Belt in France: Continental break-up and rifting of the northern Gondwana margin |
Autor: | Pouclet, André; Álvaro-Blasco, José Javier CSIC ORCID; Bardintzeff, Jacques-Marie; Gil-Imaz, Andrés; Monceret, Eric; Vizcaïno, Daniel | Palabras clave: | Gondwana margin Cambro–Ordovician volcanic activity Continental tholeiite Rheic Ocean Middle-European Ocean Palaeotethys Ocean |
Fecha de publicación: | 24-mar-2016 | Editor: | Elsevier | Citación: | Geoscience Frontiers, [in press], 2016 | Resumen: | The Cambrian–lower Ordovician volcanic units of the South Armorican and Occitan domains are analysed in a tectonostratigraphic survey of the French Variscan Belt. The South Armorican lavas consist of continental tholeiites in middle Cambrian–Furongian sequences related to continental break-up. A significant volcanic activity occurred in the Tremadocian, dominated by crustal melted rhyolitic lavas and initial rifting tholeiites. The Occitan lavas are distributed into five volcanic phases: (1) basal Cambrian rhyolites, (2) upper lower Cambrian Mg-rich tholeiites close to N-MORBs but crustal contaminated, (3) upper lower–middle Cambrian continental tholeiites, (4) Tremadocian rhyolites, and (5) upper lower Ordovician initial rift tholeiites. A rifting event linked to asthenosphere upwelling took place in the late early Cambrian but did not evolve. It renewed in the Tremadocian with abundant crustal melting due to underplating of mixed asthenospheric and lithospheric magmas. This main tectono-magmatic continental rift is termed the “Tremadocian Tectonic Belt” underlined by a chain of rhyolitic volcanoes from Occitan and South Armorican domains to Central Iberia. It evolved with the setting of syn-rift coarse siliciclastic deposits overlain by post-rift deep water shales in a suite of sedimentary basins that forecasted the South Armorican–Medio-European Ocean as a part of the Palaeotethys Ocean. | Versión del editor: | http://dx.doi.org/10.1016/j.gsf.2016.03.002 | URI: | http://hdl.handle.net/10261/133027 | DOI: | 10.1016/j.gsf.2016.03.002 | ISSN: | 1674-9871 |
Aparece en las colecciones: | (IGEO) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
GF_2016_inpress.pdf | 11,08 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
37
checked on 25-abr-2024
WEB OF SCIENCETM
Citations
30
checked on 23-feb-2024
Page view(s)
412
checked on 03-may-2024
Download(s)
409
checked on 03-may-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.