Age and setting of the Upper Neoproterozoic Narcea Antiform volcanic rocks (NW Iberia)
- Fernández Suárez, J.
- Jeffries, Teresa E.
- Gutiérrez Alonso, Gabriel
ISSN: 0213-683X
Ano de publicación: 2003
Número: 35
Páxinas: 79-82
Tipo: Artigo
Outras publicacións en: Geogaceta
Resumo
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.