Nuevas aportaciones a la datación cronológica de los granitos de Cabeza de Araya, (Cáceres)

  1. A. Rubio-Ordóñez 1
  2. O. García-Moreno 1
  3. P. Montero 2
  4. F. Bea 2
  1. 1 Universidad de Oviedo
    info

    Universidad de Oviedo

    Oviedo, España

    ROR https://ror.org/006gksa02

  2. 2 Universidad de Granada
    info

    Universidad de Granada

    Granada, España

    ROR https://ror.org/04njjy449

Journal:
Geotemas (Madrid)

ISSN: 1576-5172

Year of publication: 2016

Issue Title: IX CONGRESO GEOLÓGICO DE ESPAÑA

Issue: 16

Pages: 63-66

Type: Article

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Abstract

Cabeza de Araya pluton is the main exponent of Central Extremadura batholith. Previous crystallization ages for this batholith gave an age between 302-303 Ma. A sampling of the main facies of the Cabeza de Araya pluton has led to a sequential agesof emplacement, obtained by SHRIMP, from 308 ± 1.5 Ma to 305 ± 2 Ma for the three main facies. Facies E, known as orthogneiss of Garrovillas has an age of 296 ± 3 Ma This difference between the main body and this unit is proposed that can be caused by two different hypotheses. A) it is a different magmatic pulse, being its age similar to other intrusive on the region (e.g. La Alberca, Mérida) or B) This age is the reflection of a tectonothermal event that has passed the closure temperature of zircon system and would be related to the deformation that seem to show the rocks of this facies.

Data source: Dialnet