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Novas evidências de magmatismo alcalino na região da Baía de Guanabara (Rio de Janeiro)
| Content Provider | Semantic Scholar |
|---|---|
| Author | Chaves, Mário Martins, Carlos Romero Dossin, I. A. |
| Copyright Year | 1993 |
| Abstract | New evidence of alkaline magmatism, probably of late Cretaceous-Cenozoic age, is described from Guanabara Bay, State of Rio de Janeiro. It is represented by rock occurrences covering very small areas. The alkaline breccia of Jurubaiba Island has a phonolitic matrix with trachyte, phonolite and nepheline syenite pyroclasts. Barite of Governador Island occurs in a chalcedony breccia vein and its genesis is related to hydrothermal fiuids of the same alkaline magmatic event. These occurrences are thought to be associated with normal faulting during the separation of South America and Africa. |
| Starting Page | 43 |
| Ending Page | 47 |
| Page Count | 5 |
| File Format | PDF HTM / HTML |
| DOI | 10.11606/issn.2316-8986.v24i0p43-47 |
| Alternate Webpage(s) | http://www.revistas.usp.br/bigsc/article/download/45122/48734 |
| Alternate Webpage(s) | https://doi.org/10.11606/issn.2316-8986.v24i0p43-47 |
| Volume Number | 24 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
