40Ar/39Ar age of Mendanha Alkaline Intrusion, Rio de Janeiro, Brazil
The Mendanha Alkaline Intrusion is one of many alkaline occurences of the Southeastern Brazil Alkaline Province. It comprises plutonic rocks (alkali-syenites and syenites) and hypabyssal types (trachytes and ignibrites). In this work is presented new 40 Ar/ 39 Ar ages for this massif. The last repor...
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| Format: | Journal Article |
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Laboratorio Nacional de Energia e Geologia
2014
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| Online Access: | http://www.lneg.pt/download/9527/29_3037_ART_CG14_ESPECIAL_I.pdf http://hdl.handle.net/20.500.11937/44635 |
| _version_ | 1848757057980727296 |
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| author | Mota, C. Geraldes, M. Jourdan, Fred |
| author_facet | Mota, C. Geraldes, M. Jourdan, Fred |
| author_sort | Mota, C. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The Mendanha Alkaline Intrusion is one of many alkaline occurences of the Southeastern Brazil Alkaline Province. It comprises plutonic rocks (alkali-syenites and syenites) and hypabyssal types (trachytes and ignibrites). In this work is presented new 40 Ar/ 39 Ar ages for this massif. The last reported ages were about 74 My and 65 My by K/Ar method published in 1988. The obtained results show ages of about 64 My (64.12 ± 0.40, 64.04 ± 0.42) e 58 My (58.55 ± 0.45, 57.95 ± 0.69), which are correlated to neighbour magmatic intrusions. |
| first_indexed | 2025-11-14T09:22:03Z |
| format | Journal Article |
| id | curtin-20.500.11937-44635 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:22:03Z |
| publishDate | 2014 |
| publisher | Laboratorio Nacional de Energia e Geologia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-446352017-01-30T15:15:14Z 40Ar/39Ar age of Mendanha Alkaline Intrusion, Rio de Janeiro, Brazil Mota, C. Geraldes, M. Jourdan, Fred The Mendanha Alkaline Intrusion is one of many alkaline occurences of the Southeastern Brazil Alkaline Province. It comprises plutonic rocks (alkali-syenites and syenites) and hypabyssal types (trachytes and ignibrites). In this work is presented new 40 Ar/ 39 Ar ages for this massif. The last reported ages were about 74 My and 65 My by K/Ar method published in 1988. The obtained results show ages of about 64 My (64.12 ± 0.40, 64.04 ± 0.42) e 58 My (58.55 ± 0.45, 57.95 ± 0.69), which are correlated to neighbour magmatic intrusions. 2014 Journal Article http://hdl.handle.net/20.500.11937/44635 http://www.lneg.pt/download/9527/29_3037_ART_CG14_ESPECIAL_I.pdf Laboratorio Nacional de Energia e Geologia restricted |
| spellingShingle | Mota, C. Geraldes, M. Jourdan, Fred 40Ar/39Ar age of Mendanha Alkaline Intrusion, Rio de Janeiro, Brazil |
| title | 40Ar/39Ar age of Mendanha Alkaline Intrusion, Rio de Janeiro, Brazil |
| title_full | 40Ar/39Ar age of Mendanha Alkaline Intrusion, Rio de Janeiro, Brazil |
| title_fullStr | 40Ar/39Ar age of Mendanha Alkaline Intrusion, Rio de Janeiro, Brazil |
| title_full_unstemmed | 40Ar/39Ar age of Mendanha Alkaline Intrusion, Rio de Janeiro, Brazil |
| title_short | 40Ar/39Ar age of Mendanha Alkaline Intrusion, Rio de Janeiro, Brazil |
| title_sort | 40ar/39ar age of mendanha alkaline intrusion, rio de janeiro, brazil |
| url | http://www.lneg.pt/download/9527/29_3037_ART_CG14_ESPECIAL_I.pdf http://hdl.handle.net/20.500.11937/44635 |