Cartografía, petrografía y geoquímica del stock de Medina de las Torres (Complejo plutónico de Valencia del Ventoso, Badajoz)
- F. Sarrionandia
- M. Carracedo
- L. Eguiluz
- T. Palacios
ISSN: 1576-5172
Año de publicación: 2004
Título del ejemplar: IV Congreso Geológico de España (Zaragoza, 12-15 julio, 2004)
Número: 6
Páginas: 113-116
Tipo: Artículo
Otras publicaciones en: Geotemas (Madrid)
Resumen
The Medina de las Torres stock (SMT) represents the north edge of the Valencia del Ventoso plutonio complex, and intrudes in the Lower Cambrian materials of the Olivenza-Monesterio antiform. The south part of this stock is intruded by the Valencia del Ventoso pluton and by a dyke complex, without any genetic relationships with this stock. The SMT is formed by massive and banded gabbros, and by three massive quartzmonzodioritic facies: piroxenic, fine grained and coarse grained. All these facies show gradual contacts. These rocks are meta-aluminous, sub-alkaline and high-K calk-alkaline, and define a magnesian cafemic association, intermediate between calk-alkaline and sub-alkaline (monzonitic) associations. The absence of deformation and the disappearance of all Hercynian structuration in the exocontact of this stock, indicate that this magmatism is late-Hercynian. Its high-K calk-alkaline chemistry is typical of magmas related with postcollisional environments.