Geochemistry and petrogenesis of biotite granodiorite and its microgranulares e...

• Author(s): Antunes, I.M.H.R. ; Neiva, A.M.R. ; Silva, M.M.V.G.
• Date: 2007
• Persistent ID: http://hdl.handle.net/10400.11/760
• Origin: Repositório Científico do Instituto Politécnico de Castelo Branco
• Subject(s): microgranular enclaves; fractional crystallization; magma mixing; deformation; Oledo-Idanha-a-Nova
• Document Type: Conference Object
• Language: English

Description

Apenas está disponível o resumo da comunicação. The lower Ordovician medium-grained biotite of 479-480 Ma predominates in the Oledo-Idanha-a-Nova pluton and is deformed. It contains different biotite tonalitic and biotite granodioritic microgranular enclaves concentrated on the pluton’s west part. Microgranular enclaves and host biotite granodiorite are I-type granitic rocks and contain amphibole, sphene, allanite, ilmenite and magnetite.