Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/329034
Type: Artigo
Title: Geochemistry Of The Serra Das Melancias Pluton In The Serra Da Aldeia Suite: A Classic Post-collisional High Ba-sr Granite In The Riacho Do Pontal Fold Belt, Ne Brazil
Geochemistry of the Serra das Melancias Pluton in the Serra da Aldeia Suite: a classic post-collisional high Ba-Sr granite in The Riacho do Pontal Fold Belt, NE Brazil
Title Alternative: Geoquímica do Plúton Serra das Melancias, Suíte Serra da Aldeia: um clássico granito pós-colisional de alto Ba-Sr na Faixa Riacho do Pontal, NE Brasil
Author: Perpétuo, Marcela Paschoal
Amaral, Wagner da Silva
Costa, Felipe Grandjean da
Uchôa Filho, Evilarde Carvalho
Sousa, Daniel Francisco Martins de
Abstract: The Serra da Aldeia Suite is composed by circular or oval-shaped plutons, intrusive in meta-sedimentary and meta-volcanosedimentary rocks in the Riacho do Pontal Fold Belt, NE Brazil. The Serra das Melancias Pluton, belonging to Serra da Aldeia Suite, is located southeastern of Piaui state, near Paulistana city. These plutons represent a major magmatic expression in this area and contain important information about the late magmatic/collisional geologic evolution of the Brasiliano Orogeny. Based on petrographic and geochemical data, three facies were defined in the Serra das Melancias Pluton: granites, syenites and quartz monzonites. The rocks display high-K and alkaline to shoshonitic affinities, are metaluminous and show ferrous character. They are enriched in Light Rare Earth Elements and Large Ion Lithophile Elements, with negative anomalies in Nb, Ta and Ti. Their high Ba, Sr, K/Rb, low Rb, relatively low U, Th, Nb to very low Heavy Rare Earth Elements and Y resemble those of typical high Ba-Sr granitoids. The geochemical data suggest the emplacement of Serra das Melancias Pluton in a transitional, late to post-orogenic setting in the Riacho do Pontal Fold Belt during the late Brasiliano-Pan African Orogeny.
The Serra da Aldeia Suite is composed by circular or oval-shaped plutons, intrusive in meta-sedimentary and meta-volcanosedimentary rocks in the Riacho do Pontal Fold Belt, NE Brazil. The Serra das Melancias Pluton, belonging to Serra da Aldeia Suite, is
metadata.dc.description.abstractalternative: A suíte Serra da Aldeia é composta por plútons graníticos circulares ou ovalados, intrusivos em sequências metassedimentares e metavulcanossedimentares na Faixa Riacho do Pontal, Nordeste do Brasil. O Plúton Serra das Melancias, pertencente à suíte Serra
Subject: Alkaline Granites
Geochemistry
Riacho Do Pontal Fold Belt
Borborema Province
High Ba-sr Granites
Província Pegmatítica da Borborema (PPB)
Granito
Geoquímica
Country: Brasil
Editor: Sociedade Brasileira de Geologia
Citation: Brazilian Journal Of Geology. Soc Brasileira Geologia, v. 46, p. 221 - 237, 2016.
Rights: aberto
aberto
Identifier DOI: 10.1590/2317-4889201620160002
Address: https://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892016000200221
Date Issue: 2016
Appears in Collections:IG - Artigos e Outros Documentos

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