The Galicia - Ossa-Morena Zone: a new zone of the Iberian Massif

Correlation of a group of allochthonous terranes (referred to as basal, ophiolitic and upper units) exposed in the NW and SW of the Iberian Massif, is used to propose a new geotectonic zone in the southern branch of the Variscan Orogen: the Galicia - Ossa-Morena Zone. Recent advances in SW Iberia id...

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Detalles Bibliográficos
Autores: Arenas Martín, Ricardo, Díez Fernández, Rubén, Rubio Pascual, Francisco J., Sánchez Martínez, Sonia, Martín Parra, Luis Miguel, Matas, J., González del Tánago y del Río, José, Jiménez Díaz, Alberto, Fuenlabrada Pérez, José Manuel, Andonaegui Moreno, María Del Pilar, Garcia Casco, Antonio
Tipo de recurso: artículo
Fecha de publicación:2016
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/23760
Acceso en línea:https://hdl.handle.net/20.500.14352/23760
Access Level:acceso abierto
Palabra clave:551.24
Galicia - Ossa-Morena Zone
New geotectonic zone
Iberian Massif
Variscan Orogen
Zona de Galicia – Ossa-Morena
Nueva zona geotectónica
Macizo Ibérico
Orógeno Varisco
Geodinámica
2507 Geofísica
Descripción
Sumario:Correlation of a group of allochthonous terranes (referred to as basal, ophiolitic and upper units) exposed in the NW and SW of the Iberian Massif, is used to propose a new geotectonic zone in the southern branch of the Variscan Orogen: the Galicia - Ossa-Morena Zone. Recent advances in SW Iberia identify most of the former Ossa-Morena Zone as another allochthonous complex of the Iberian Massif, the Ossa-Morena Complex, equivalent to the Cabo Ortegal, Órdenes, Malpica-Tui, Bragança and Morais complexes described in NW Iberia. The new geotectonic zone and its counterparts along the rest of the Variscan Orogen constitute an Internal Variscan Zone with ophiolites and units affected by high-P metamorphism. The Galicia - Ossa-Morena Zone includes a Variscan suture and pieces of continental crust bearing the imprint of Ediacaran-Cambrian events related to the activity of peri-Gondwanan magmatic arcs (Cadomian orogenesis). In the Iberian Massif, the general structure of this geotectonic zone represents a duplication of the Gondwanan platform, the outboard sections being juxtaposed on top of domains located closer to the mainland before amalgamation.

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