Age and setting of the Upper Neoproterozoic Narcea Antiform volcanic rocks (NW Iberia)

1. Fernández Suárez, J.
2. Jeffries, Teresa E.
3. Gutiérrez Alonso, Gabriel

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Otras publicaciones en: Geogaceta

Resumen

U-Pb dating of zircons from ryolites intercalated within the Narcea Antiform Neoproterozoic rocks was performed by laser ablation ICP-MS). The age of the ryolite is 559±3 Ma which allows the separation of two different units within the previously established Tineo Series. It is suggested that a terrane-transfer related pull-apart environment could have been the ideal setting for the genesis of these rocks in accordance with previously proposed models for the Neoproterozoic evolution of this region.

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