Resultados globales: 2 registros encontrados en 0.02 segundos.
Artículos, Encontrados 2 registros
Artículos Encontrados 2 registros  
1.
20 p, 12.5 MB Magnetic mineralogy of Variscan granites from northern Portugal : an approach to their petrogenesis and metallogenic potential / Cruz, Claudia (Universidade do Porto. Departamento de Geociências Ambiente e Ordenamento do Território) ; Sant'Ovaia, H. (Universidade do Porto. Departamento de Geociências Ambiente e Ordenamento do Território) ; Noronha, Fernando (Instituto de Ciências da Terra-Polo Porto)
Northern Portugal is characterized by the occurrence of numerous W hydrothermal deposits spatially associated with granites. The primary goal of this work is to establish a relationship between the magnetic behavior of the granites and the redox conditions during magma genesis, as this can influence the occurrence of mineralizations, namely of W (Mo). [...]
2020 - 10.1344/GeologicaActa2020.18.5
Geologica acta, Vol. 18 (2020) , p. 1-20 (Articles)  
2.
16 p, 2.4 MB Alteration of spodumene to cookeite and its pressure and temperature stability conditions in Li-bearing aplite-pegmatites from northern Portugal / Bobos, Iuliu (Universidade do Porto) ; Vieillard, Philippe (Université de Poitiers) ; Charoy, Bernard (Ecole Normale Supérieure de Géologie) ; Noronha, Fernando (Universidade do Porto)
The alteration of spodumene to cookeite has been identified in a Li-bearing aplite-pegmatite from northern Portugal. Optical microscopy and scanning and transmission electron microscopy (SEM/TEM) were used to characterize the alteration products in both cookeite + quartz and cookeite, + kaolinite ± mica assemblages. [...]
2007 - 10.1346/CCMN.2007.0550306
Clays and Clay Minerals, Vol. 55, Núm. 3 (2007) , p. 295-310  

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