New high-precision 40Ar/39Ar ages for the Serra do Mar alkaline magmatism in the São Sebastião Island, SE Brazil, and implications

Abstract We present new high-resolution 40Ar/39Ar ages for alkaline layered gabbros and cross-cutting mafic-ultramafic and felsic dykes from the São Sebastião Island, in the northern sector of the Serra do Mar Alkaline Province, São Paulo, Brazil. Duplicate analysis of single kaersutite crystals yie...

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Bibliographic Details
Main Authors: Maria Isabel Giraldo-Arroyave, Silvio Roberto Farias Vlach, Paulo Marcos Vasconcelos
Format: Article
Language:English
Published: Sociedade Brasileira de Geologia 2022-01-01
Series:Brazilian Journal of Geology
Subjects:
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892021000400304&lng=en&tlng=en