Multiple processes of geochemical evolution for the alkaline rocks of Rio Bonito intrusive complex, Rio de Janeiro State, Brazil: 40Ar/39Ar and U-Pb ages and Lu-Hf isotopes on zircon and constraints on crustal signature

Multiple processes of geochemical evolution for the alkaline rocks of Rio Bonito intrusive complex, Rio de Janeiro State, Brazil: 40Ar/39Ar and U-Pb ages and Lu-Hf isotopes on zircon and constraints on crustal signature

This article presents geochemical characteristics of the alkaline rocks of Rio Bonito intrusive complex, State of Rio de Janeiro, Brazil, which is constituted mainly by nepheline syenite. The fractional crystallisation of this magma decreases K2O/(Na2O + K2O) and increases (Na + K)/Al. The TiO2, Fe...

Full description

Bibliographic Details
Main Authors: Daniel Adelino da Silva, Akihisa Motoki, Anderson Costa dos Santos, Julio Mendes, Fred Jourdan, Mauro César Geraldes, Cristiano de Carvalho Lana
Format: Article
Language:English
Published: Universidade de São Paulo 2020-12-01
Series:Geologia USP. Série Científica
Subjects:
Nepheline syenite
Rio Bonito
Fractional crystallisation
Crustal assimilation
40Ar/39Ar and U-Pb dating
Online Access:https://www.revistas.usp.br/guspsc/article/view/180297

Internet

https://www.revistas.usp.br/guspsc/article/view/180297

Similar Items