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

Marceliano Lago San José, Andrés Gil Imaz, Enrique Arranz Yagüe, Joaquín Bastida Cuairan, Andrés Pocoví Juan

• 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.