| Título: | Multiple crustal sources for post-tectonic I-type granitesin the Hercynian Iberian Belt |
| Autores: | Villaseca González, Carlos ; Bellido Mulas, Félix ; Pérez-Soba Aguilar, Cecilia ; Billstrom, Kjell |
| Tipo de documento: | texto impreso |
| Editorial: | Springer Science Business Media, 2009 |
| Dimensiones: | application/pdf |
| Nota general: | info:eu-repo/semantics/openAccess |
| Idiomas: | |
| Palabras clave: | Estado = Publicado , Materia = Ciencias: Geología: Petrología , Tipo = Artículo |
| Resumen: |
A post-tectonic plutonic array of felsic I-type granites crops out in the western Hercynian Iberian Belt. Isotope (Sr, N d, Pb) data favour the absence of an important input of juvenile magmas in late- to post- tectonic Hercynian felsic magmatism in western Iberia, but suggest a reworking of different crustal protoliths, including oceanic metabasic rocks accreted to mid-to-Iower crustal levels during the early stages of the collision. I-type granites were derived from different meta-igneous protoliths ranging from metabasic to felsic compositions depending on their geographical position from the external (e.g. Galicia-N Portugal, GNP) to the innermost continental areas (Spanish Central System and Los Pedroches Batholiths). The GNP 1- type pIu tons related to eo-Hercynian accretional terranes have lower initial 87Sr/86Sr ratios, lower negative ?Nd values, and higher 206PbP04Pb ratios than other I-type granites of the Central Iberian zone. These more isotopically primitive Hercynian I-type granites are important in tracking pre-Hercynian accreted oceanic lithosphere terranes. |
| En línea: | https://eprints.ucm.es/id/eprint/12324/1/MineralPetrol09_1_.jpg.pdf |
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