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...

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Bibliographic Details

Published in:	Anuário do Instituto de Geociências
Main Authors:	Alexandre de Oliveira Chaves, Ivo Antonio Dussin
Format:	Article
Language:	English
Published:	Universidade Federal do Rio de Janeiro 2018-08-01
Subjects:	Trachy-andesite Gouveia Pedro Lessa Formiga U-Pb geochemistry LIP
Online Access:	http://www.anuario.igeo.ufrj.br/2018_03/2018_3_05_15.pdf