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Título
Crustal sources in lower palaeozoic rocks from NW Iberia: insights from laser ablation U-Pb ages of detrital zircons
Autor(es)
Materia
Rocas
Paleozoico
España
Laser
NW Iberia
Laser ablation methods
U-Pb
Zircon
Fecha de publicación
1999
Editor
Geological Society (Londres, Gran Bretaña)
Citación
Fernández Suárez, J., Gutiérrez Alonso, G.,Jenner, G. A.,Tubrett, M. N. (1999). Crustal sources in lower palaeozoic rocks from NW Iberia: insights from laser ablation U-Pb ages of detrital zircons. "Journal of the Geological Society",156, 1065-1068.
Resumen
Detrital zircons from greywackes belonging to an Ordovician volcanosedimentary-igneous complex in NW Spain were dated using the laser ablation-inductively coupled plasma-mass spectrometry technique. U-Pb results indicate the existence of three Precambrian crustal sources in NW Iberia. The age grouping datetd at c. 590-620 Ma. confirms the presence of a Cadomian-Avalonian basement in this zone. The second age group (c. 1.1-1.2 Ga) is the first evidence for a Grenvillean age crustal component in NW Iberia. The age grouping dated at c. 1.9-2.0 Ga corresponds to the age of the Icartian igneous basement exposed in other areas of the European Variscides.
Descripción
Estudio de las rocas paleozoicas del Noroeste de España
URI
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