Geochemistry of two proterozoic A-type granites of Goias state, Brazil: possible links with rapakivi series

Essaïd Bilal (1, 2, 3) , Jacques Moutte (1, 2, 3) , N.F. Botelho (4) , O.J Marini (4) , Gustavo Andrade (4)

1 GENERIC-ENSMSE - Département Géochimie, environnement, écoulement, réacteurs industriels et cristallisation
2 LMV-ENSMSE - Laboratoire Magmas et Volcans
3 SPIN-ENSMSE - Centre Sciences des Processus Industriels et Naturels
4 UnB - Universidade de Brasilia [Brasília]

The Mesoproterozoic (1.77 ga-1.60 ga) granites of the Goias Tin Province occur in the states of Goias and Tocantins, Brazil. They are situated in the Rio Parana and the Rio Tocantins sub-provinces. They are very similar in mineralogy, geochemistry, and age of emplacement, to the Arai rhyolites. Their compositions are comparable to those of A-type granites. The present paper discusses the principal mineralogical and geochemical characteristics of the Sucuri and Serra Dourada granites of the Goias tin-province.

Domaines: Génie des procédés; Géochimie

Essaïd Bilal, Jacques Moutte, N.F. Botelho, O.J Marini, Gustavo Andrade. Geochemistry of two proterozoic A-type granites of Goias state, Brazil: possible links with rapakivi series. Anais da Academia Brasileira de Ciências, 1997, 69 (3), pp.349-365. ⟨hal-01350746⟩