Azevedo M.R.,University of Aveiro |
Azevedo M.R.,Unidade de Investigacao GEOBIOTEC PEst OE CTE UI4035 2014 |
Martins F.,University of Aveiro |
Cardoso T.,University of Aveiro |
And 5 more authors.
The Sátão granite complex consists of two plutons, elongated in the ENE-WSW direction: a medium grained two-mica granite (muscovite > biotite) and a porphyritic two-mica granite (muscovite ≈ biotite). Both granites show heterogeneous deformation and define relations with the country rocks, consistent with their classification as syn-D3 Variscan granitoids. The petrographic and whole-rock geochemical data suggest that the two granites were derived from anatectic crustal magmas (S-type), affected by fractional crystallization processes of variable extent. Based on the available results, it is not possible to assess if the porphyritic granite is genetically related with the medium grained granite or corresponds to a distinct magmatic pulse. The U-Pb zircon and monazite data obtained for the medium grained two-mica granite (315.2 ± 1.6 Ma) dates the age of the crystallization of this syn-D3 intrusion. © 2014 LNEG – Laboratório Nacional de Geologia e Energia IP. Source