The late Variscan HT/LP metamorphic event in the Iberian branch of the Variscides: Relationships with crustal thickening, nappe emplacement, orocline development, and crustal evolution
Late Variscan metamorphism in the Iberian Massif is characterized by high-T and low-P associations overprinting a Barrovian zonation developed during -and partly following- crustal thickening related to the Variscan collision. The highgrade rocks, commonly reaching sillimanite-K feldsparmuscovite ou...
| Autores: | , , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2012 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/276771 |
| Acceso en línea: | http://hdl.handle.net/10261/276771 |
| Access Level: | acceso abierto |
| Palabra clave: | Orogenia Varisca manto corrimiento engrosamiento corteza corteza continental paragénesis deformación domo gneísico España |
| Sumario: | Late Variscan metamorphism in the Iberian Massif is characterized by high-T and low-P associations overprinting a Barrovian zonation developed during -and partly following- crustal thickening related to the Variscan collision. The highgrade rocks, commonly reaching sillimanite-K feldsparmuscovite out parageneses and locally even granulitic (biotite out) conditions, crop out at the core of gneiss domes where partial melting, migmatite development and syn-kinematic granitoids are abundant. Gneiss domes are often bounded on top by ductile detachments that, like the domes, formed during an extensional phase of deformation reflecting thermal relaxation and the subsequent collapse of the thickened continental crust |
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