Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.11/798
Título: The Precambrian/Lower Cambrian pluton from Vila Nova
Autor: Reis, A.I.M.
Silva, M.M.V.G.
Antunes, I.M.H.R.
Palavras-chave: Granite
U-Pb isotopic data
Cadomian magmatism
Data: 2010
Editora: CSIC
Citação: REIS, A.I.M. ; SILVA, M.M.V.G. ; ANTUNES, I.M.H.R. (2010) - The Precambrian/Lower Cambrian pluton from Vila Nova. Estudios Geológicos. ISSN 0367-0449. 66:1, p. 51-56.
Resumo: The Vila Nova pluton is a small, Pre-Variscan granitic body that intruded rocks of the Central Iberian Zone near the contact with the Ossa Morena Zone and is affected by several shear zones and faults. Its contact metamorphic aureole is constituted by micaschist with porphyroblasts in the outer zone and hornfels in the inner zone. Small metasedimentar xenoliths are dispersed all over the body. The pluton has a great mineralogical heterogeneity with pronounced variations in muscovite/biotite and plagioclase/ microcline contents and is classified as granite, granodiorite or tonalite. It is a leucogranite, highly peraluminous (A/CNK = 1.31 – 1.64), magnesian and calc-alkaline to alkaline-calcic. The variation diagrams show curvilinear trends with silica. Eu/Eu* = 0.47 – 0.77 and there is a slight enrichment in LREE relative to HREE. The normalized diagrams indicated dominantly crustal granite, related to subduction. U-Pb isotopic data of zircon and monazite gives 540-542 Ma age.
Peer review: yes
URI: http://hdl.handle.net/10400.11/798
ISSN: 0367-0449
Versão do Editor: http://estudiosgeol.revistas.csic.es/index.php/estudiosgeol/article/viewArticle/802
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