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

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

ISSN: 0213-683X

Year of publication: 2003

Issue: 35

Pages: 79-82

Type: Article

More publications in: Geogaceta


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.