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The Late Neoproterozoic magmatism in the Ediacaran series of the Eastern Pyrenees: new ages and isotope geochemistry

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Casas Tuset, Josep María y Navidad Fernández de la Cruz, Marina y Castiñeiras García, Pedro y Liesa Torre Marín, Montserrat y Aguilar, Carmen y Carreras, Jordi y Hofmann, Mandy y Gärtner, Andreas y Linnemann, Ulf (2015) The Late Neoproterozoic magmatism in the Ediacaran series of the Eastern Pyrenees: new ages and isotope geochemistry. International Journal of Earth Sciences, 104 (4). pp. 909-925. ISSN 1437-3254

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URL Oficial: http://link.springer.com/article/10.1007/s00531-014-1127-1



Resumen

Geochronological U–Pb (LA-ICP-MS), geochemical and isotopic data from metavolcanic felsic rocks of the Canigó and Cap de Creus massifs in the Eastern Pyrenees provide evidence of an Ediacaran magmatic event lasting 30 Ma in NE Iberia. These data also constrain the age of the Late Neoproterozoic succession in the Cap de Creus massif, where depositional ages range from 577 to 558 Ma, and in the Canigó massif, where the data (575–568 Ma) represent minimum ages. The geochemistry of the felsic rocks indicates that they were formed in a backarc environment and they record a fragment of a longlived subduction-related magmatic arc (620–520 Ma) in the active northern Gondwana margin. The homogeneity
shown by all these crustal fragments along this margin suggests that the individualization of the Pyrenean basement
from the Iberian Massif started later, probably during its
transition from an active to a passive margin in Cambro–
Ordovician times.


Tipo de documento:Artículo
Palabras clave:Ediacaran magmatism, Pyrenees, Cadomian, U–Pb zircon geochronology, Sr–Nd isotopes
Materias:Ciencias > Geología
Ciencias > Geología > Geoquímica
Código ID:41755
Depositado:11 May 2017 11:47
Última Modificación:11 May 2017 11:47

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