Aportaciones estructurales al conocimiento del sinclinal de TamamesDominio del Esquisto Grauváquico de la Zona Centro Ibérica (Macizo Ibérico)
- Emilio González Clavijo 1
- Guillermo Martín García 2
- José R. Martínez Catalán 2
- Juan Gómez Barreiro 2
- 1 IGME, España
- 2 Universidad de Salamanca, España
ISSN: 0213-683X
Année de publication: 2017
Titre de la publication: Comunicaciones presentadas en la LXII Sesión Científica / Guadalupe, 25 de Mayo de 2017
Número: 62
Pages: 3-6
Type: Article
D'autres publications dans: Geogaceta
Résumé
A structural study on the eastern part of the Tamames syncline, in the Central Iberian Zone (CIZ) of the Variscan Massif, discloses that the tectonic foliation related to the major folds is a late-Variscan crenulation. This foliation is roughly coeval to the thermal metamorphism generated by Los Santos granite (309-307 Ma). The axial planes of these folds are displaced when they cross cut the Toledanic unconformity creating the illusion of a non-schistose pre-Ordovician folding event. Later on, open sub-horizontal folds with associated crenulation cleavage are generated by a late-Variscan extensional event, as recognized in other areas of the CIZ. The evidence of a late-Variscan age for the shortening phase that generated the Tamames syncline is consistent with the existence of the Central Iberian Arc in the Iberian Massif.