ESTRUTURA E DEFORMAÇÃO BRASILIANA NOS DIQUES MÁFICOS DA SERRA DO ESPINHAÇO MERIDIONAL
DOI :
https://doi.org/10.18285/geonomos.v8i2.154Résumé
Mafic dike swarms are abundant in Southern Espinhaço Mountain Range. They are essential tools for theunderstanding of the geodynamic process, marking the beginning of extension tectonic regimes. This paperdescribes the mafic dike swarm of the Southern Espinhaço, their field relationships, petrography anddeformational history. The dykes are: (1) metagabbros with relict igneous textures, N-S oriented, deformedwith un anastomosed protomylonitic foliation; (2) greenschists (sericite-epidote-chlorite schists) withlepidoblastic textures, fine-grained, east-west trending. These dikes represent significant amounts of maficmelts formed during the first stages of the Brasiliano cycle. They have a foliation parallel to the regionalfoliation of the Espinhaço Supergroup, related with the Brasiliano Orogeny.Téléchargements
Les données relatives au téléchargement ne sont pas encore disponibles.
Téléchargements
Publiée
2000-12-01
Numéro
Rubrique
Artigos
Licence
The copyrights of the works published in Geonomos are those of the author, with rights of first publication for the journal.