Geologia, petrografia e geoquímica das rochas plutônicas precambrianas (unidade metadiorítica Ibitutinga e unidade metatrondhjemítica Caburu) intrusivas nas rochas do greenstone Belt Barbacena, São João del Rei, Minas Gerais
In the southeastern portion of the São Francisco Craton, located between São João Del Rey and Ritápolis cities (Minas Gerai, State) an area of nearly 180 km² of rocks of the Barbacena Greenstone Belt (metaultramafic and amphibolitic rocks, and schists) and associated mafic to felsic plutonic intrusi...
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| Tipo de documento: | dissertação |
| Estado: | Versão publicada |
| Data de publicação: | 1992 |
| País: | Brasil |
| Recursos: | Universidade Federal do Rio de Janeiro (UFRJ) |
| Repositório: | Repositório Institucional da UFRJ |
| Idioma: | português |
| OAI Identifier: | oai:pantheon.ufrj.br:11422/5755 |
| Acesso em linha: | http://hdl.handle.net/11422/5755 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Rochas ígneas São João del Rei (MG) Petrologia Geologia Geoquímica CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::GEOLOGIA |
| Resumo: | In the southeastern portion of the São Francisco Craton, located between São João Del Rey and Ritápolis cities (Minas Gerai, State) an area of nearly 180 km² of rocks of the Barbacena Greenstone Belt (metaultramafic and amphibolitic rocks, and schists) and associated mafic to felsic plutonic intrusives was mapped. The Granodioritic – Granitic Unit comprises granites, quartz monnzodiorJtes and granodiorites, previously vaguely described in the litera.ture as granite. The parental magmas for this rock unit are interpretated as the most. Possible source of the K-rich solutions responsible for the metasomatic transtormations of the rocks of Ibitutinga Metadioritic Unit and the Caburu Metatrondhjemitic Unil. |
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