U-Pb Age and Geochemistry of the Tholeiitic Trachy-Andesite of Gouveia (MG) Compared with Regional Pedro Lessa and Formiga Tholeiitic Basic Rocks: Fragments of a Tonian Large Igneous Province (LIP)
In Gouveia (MG), a tholeiitic high-K trachy-andesitic subvolcanic rock, with phenocrysts of plagioclase and sanidine, and a matrix rich in feldspars, biotite, magmatic epidote and quartz, outcrops in the form of irregular bodies and subverticalized dykes. The U-Pb age of 938.5 +/- 4.5 Ma found for...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Universidade Federal do Rio de Janeiro
2018-08-01
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| Series: | Anuário do Instituto de Geociências |
| Subjects: | |
| Online Access: | http://www.anuario.igeo.ufrj.br/2018_03/2018_3_05_15.pdf |