Emplazamiento, Petrología y Geoquímica del Complejo Volcano-Clástico de Orea (Guadalajara, Cadena Ibérica Occidental)

  1. Lago, M.
  2. Gil-Imaz, A.
  3. Arranz, E.
  4. Bastida, J.
  5. Pocovi, A.
Revue:
Cadernos do Laboratorio Xeolóxico de Laxe: Revista de xeoloxía galega e do hercínico peninsular

ISSN: 0213-4497

Année de publication: 1995

Número: 20

Pages: 195-212

Type: Article

D'autres publications dans: Cadernos do Laboratorio Xeolóxico de Laxe: Revista de xeoloxía galega e do hercínico peninsular

Résumé

The volcanoclastic outcrop of Orea (south margin of the Iberian Chain) reflects a pluriepisodic igneous activity, expressed in agglomerates and tuffs of dacitic composition (with a calc-alkaline affinity) and Autunian-Thuringian age. The tuffs are the results of a hydromagmatic activity, developed under a thin sheet of water (in a paludal environment). The structure of the magmatic outcrop results of the late-Hercynian extensional tectonics, equivalent to that observed in many other outcrops of the southeast border of the Iberian Chain. The setting characters and composition of the involved magmatic rock-types, suggest the presence of only one volcanic focus, as in other coetaneous half-grabens of this sector of the Iberian Chain.