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
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...
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| Format: | Article |
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Sociedade Brasileira de Geologia
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| Series: | Brazilian Journal of Geology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892016000200221&lng=en&tlng=en |
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| author | Marcela Paschoal Perpétuo Wagner da Silva Amaral Felipe Grandjean da Costa Evilarde Carvalho Uchôa Filho Daniel Francisco Martins de Sousa |
| author_facet | Marcela Paschoal Perpétuo Wagner da Silva Amaral Felipe Grandjean da Costa Evilarde Carvalho Uchôa Filho Daniel Francisco Martins de Sousa |
| author_sort | Marcela Paschoal Perpétuo |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-13T09:33:30Z |
| format | Article |
| id | doaj.art-aa117b8acbd442d5b0583a3f0cffe276 |
| institution | Directory Open Access Journal |
| issn | 2317-4692 |
| language | English |
| last_indexed | 2024-04-13T09:33:30Z |
| publisher | Sociedade Brasileira de Geologia |
| record_format | Article |
| series | Brazilian Journal of Geology |
| spelling | doaj.art-aa117b8acbd442d5b0583a3f0cffe2762022-12-22T02:52:11ZengSociedade Brasileira de GeologiaBrazilian Journal of Geology2317-469246222123710.1590/2317-4889201620160002S2317-48892016000200221Geochemistry 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 BrazilMarcela Paschoal PerpétuoWagner da Silva AmaralFelipe Grandjean da CostaEvilarde Carvalho Uchôa FilhoDaniel Francisco Martins de SousaABSTRACT: 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.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892016000200221&lng=en&tlng=engranitos alcalinosgeoquímicaFaixa Riacho do PontalProvíncia Borboremagranitos alto Ba-Sr |
| spellingShingle | Marcela Paschoal Perpétuo Wagner da Silva Amaral Felipe Grandjean da Costa Evilarde Carvalho Uchôa Filho Daniel Francisco Martins de Sousa 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 Brazilian Journal of Geology granitos alcalinos geoquímica Faixa Riacho do Pontal Província Borborema granitos alto Ba-Sr |
| 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 |
| title_full | 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_fullStr | 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_full_unstemmed | 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_short | 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_sort | 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 |
| topic | granitos alcalinos geoquímica Faixa Riacho do Pontal Província Borborema granitos alto Ba-Sr |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892016000200221&lng=en&tlng=en |
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