Geocronología y geoquímica isotópica de yacimientos de Sn-W en el Macizo Varisco Ibérico
The Iberian Variscan Massif, representing the southernmost branch of the European Variscan belt, is the host for a significant economic potential for different types of Sn and W ores. Here, the Sn-(Ta-Li) mineralization occurs disseminated in pegmatites and granite cupolas or associated with peri-gr...
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| Tipo de recurso: | tesis doctoral |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/107657 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/107657 |
| Access Level: | acceso abierto |
| Palabra clave: | 550.4(043.2) Geoquímica isotópica Isotope geology Geoquímica 2503 Geoquímica |
| Sumario: | The Iberian Variscan Massif, representing the southernmost branch of the European Variscan belt, is the host for a significant economic potential for different types of Sn and W ores. Here, the Sn-(Ta-Li) mineralization occurs disseminated in pegmatites and granite cupolas or associated with peri-granitic quartz vein systems. In contrast, the W-(Sn) mineralization is dominantly associated with quartz vein systems but also skarns, stratabound skarnoid-like and porphyry-like deposits. This thesis aims to: (1) date the Sn-W metallogenic events in the framework of the Variscan Orogeny, with especial emphasis in the relationship between ores and granitic magmatism of Late Carboniferous to Early Permian age; (2) characterize the potential source(s) of the Sn, W and associated metals; and, (3) track the causes of the local decoupling between Sn and W at the deposit scale. This work is based on the study of selected deposits in the Iberian Variscan Massif using a multidisciplinary approach combining field work and mapping, petrography, mineral and isotope geochemistry, geochronology and thermodynamic models... |
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