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...
| Main Authors: | , , |
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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 |