Resultats globals: 2 registres trobats en 0.02 segons.
Articles, 2 registres trobats
Articles 2 registres trobats  
1.
17 p, 7.5 MB Age of the basement beneath the Mesozoic Lusitanian Basin revealed by granitic xenoliths from the Papôa volcanic breccia (West Iberia) / Pereira, M. F. (Universidade de Évora. Instituto de Ciências da Terra) ; Gama, C. (Universidade de Évora. Instituto de Ciências da Terra) ; Silva, J. B. (Universidade de Lisboa. Departamento de Geologia) ; Dias da Silva, Í. (Universidade de Lisboa. Departamento de Geologia)
The dyke of the Papôa volcanic breccia cross-cutting the Lower Jurassic sequence of the Lusitanian Basin (West Iberia) contains granitic xenoliths. In this study, for the first time, U-Th-Pb zircon analysis of two xenoliths yielded 298 ± 4 Ma for biotite granite and of 292 ± 2 Ma for two-mica granite, indicating that the pre-Mesozoic basement of the Lusitanian Basin includes Permian intrusions. [...]
2020 - 10.1344/GeologicaActa2020.18.16
Geologica acta, Vol. 18 (2020) , p. 1-19 (Articles)  
2.
28 p, 7.2 MB Coeval interaction between magmas of contrasting composition (Late Carboniferous-Early Permian Santa Eulália-Monforte massif, Ossa-Morena Zone) : field relationships and geochronological constraints / Pereira, M. F. (Universidade de Évora. Departamento de Geociências) ; Gama, C. (Universidade de Évora. Departamento de Geociências) ; Rodríguez, Carmen (Universidad de Huelva. Departamento de Ciencias de la Tierra)
The Santa Eulália-Monforte massif is a post-kinematic Late Carboniferous-Early Permian calc-alkaline composite massif (LC-EP) located in the Ossa-Morena Zone (OMZ, Portugal). This paper examines the field relationships between pinkish granites and mafic-intermediate rocks from the external ring of this massif and presents new U-Pb zircon age determinations. [...]
2017 - 10.1344/GeologicaActa2017.15.4.10
Geologica acta, Vol. 15 Núm. 4 (December 2017) , p. 409-428  

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