4 documents found, page 1 of 1
Os maciços granitóides ordovícicos e tardi-variscos da área do Geopark Naturtej...
Antunes, Isabel Margarida Horta Ribeiro; Ribeiro da Costa, IsabelOs granitos marginais e a auréola de contacto do plutão de Penamacor-Monsanto (Zona Centro-Ibérica da Cadeia Varisca) apresentam heterogeneidades texturais e mineralógicas relevantes para a interpretação dos efeitos desta intrusão granítica nos metassedimentos do Complexo Xisto-Grauváquico encaixante, afectados por metamorfismo regional varisco. Variações térmicas e composicionais durante a instalação dos grani...
Sensibility of tourmaline chemistry to granitic magma composition and oxygen fu...
Ribeiro da Costa, Isabel; Antunes, Isabel Margarida Horta RibeiroExtensive granitic magmatism is a dominant feature of the Central Iberian Zone (CIZ) of the Variscan Orogen. For the most part, these are S-type peraluminous granitic rocks exhibiting variable degrees of evolution and compositions ranging from granodiorites, through mon zogranites and granites to leucogranites, bearing either biotite and muscovite, or just muscovite in the more evolved facies. Tourmaline is a c...
Sensibility of tourmaline chemistry to granitic magma composition and oxygen fu...
Ribeiro da Costa, Isabel; Antunes, Isabel Margarida Horta RibeiroMassive granitic magmatism is a dominant feature of the Central Iberian Zone (CIZ) of the Variscan Orogen. For the most part, these are S-type per-aluminous granitic rocks exhibiting variable degrees of evolution and compositions ranging from granodiorites, through monzogranites and granites to leucogranites, bearing either biotite and muscovite, or just muscovite in the more evolved facies. Tourmaline is a com...
Contact metamorphism associated to the Penamacor–Monsanto granitic intrusion (C...
Ribeiro da Costa, Isabel; Antunes, Isabel Margarida H. R.; Mourão, Cyntia; Recio, Clemente; Guimarães, Fernanda; Ramos, João FarinhaContact metamorphism related to Variscan and late-Variscan granitic plutons in the Iberian Peninsula is superimposed on medium-grade regional metamorphism, making it often difficult to evaluate per se the thermal effects due to those intrusions and explaining the paucity of scientific literature on the subject. An exhaustive set of geochemical, isotopic and mineralogical data on the contact-zone metasediments h...