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

Revue:
Geotemas (Madrid)

ISSN: 1576-5172

Année de publication: 2016

Titre de la publication: IX CONGRESO GEOLÓGICO DE ESPAÑA

Número: 16

Pages: 63-66

Type: Article

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D'autres publications dans: Geotemas (Madrid)

Résumé

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.

La source de données: Dialnet