Ocorrência de Rocha Alcalina no Município de Piraí, RJ, e sua Relação com o Lineamento de Além Paraíba (Nota Preliminar)

Autores

  • André Luiz Ferrari
  • Ivan Sérgio Siqueira Dupuy
  • Thomas Lafayette Brenner

DOI:

https://doi.org/10.11137/1977_0_114-121

Resumo

The Serra dos Tomazes, located in the Pirai District, RJ, consists of an intrusive alkaline body, composed mainly of micronepheline-syenites.This alkaline body intrudes metatexites of the "Paraiba do Sul" folded belt. Mylonitic Zones were recognized south of the intrusive alkaline body, andthey may be associated with the Alem Paraiba Lineament. This lineamentcorresnponds to an ENE striking transcurrent fault. This fault belongs to asystem of transcurrent faults that is called the "São Paulo Transcurrence Zone". The strike-slip faults that form the bulk of the "São Paulo Transcurrence Zone" are generally right-lateral. The Serra dos Tomazes alkaline body is probably associeted, in time and in origin, with other alkaline intrusions in the State of Rio de Janeiro. This  alkaline magmatismseems to be associated, at least geographically, with the São Paulo Transcurrence Zone.

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Publicado

1977-01-01

Edição

Seção

não definida