Petrography and geochemistry of metamafic rocks intercalated in gneisses from Goiás Magmatic Arc, region of Indiara (GO)
In Indiara region (GO), dozens of metamafic rocks lenses of various dimensions (metric to kilometric) occur, intercalated in gneisses of the Goiás Magmatic Arc and oriented according to the direction of the main foliation (Sn). These lenses consist of amphibolite (amphibole schists and amphiboli...
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| Format: | Article |
| Language: | English |
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Universidade de São Paulo
2015-03-01
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| Series: | Geologia USP. Série Científica |
| Subjects: | |
| Online Access: | http://ppegeo.igc.usp.br/pdf/guspsc/v15n1/03.pdf |
| _version_ | 1818532699751579648 |
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| author | Guillermo Rafael Beltran Navarro Regiane Andrade Fumes Antenor Zanardo Marcos Aurélio Farias de Oliveira George Luiz Luvizotto |
| author_facet | Guillermo Rafael Beltran Navarro Regiane Andrade Fumes Antenor Zanardo Marcos Aurélio Farias de Oliveira George Luiz Luvizotto |
| author_sort | Guillermo Rafael Beltran Navarro |
| collection | DOAJ |
| description | In Indiara region (GO), dozens of metamafic rocks lenses of various dimensions (metric to kilometric) occur, intercalated in
gneisses of the Goiás Magmatic Arc and oriented according to the direction of the main foliation (Sn). These lenses consist
of amphibolite (amphibole schists and amphibolites), have chemical compositions of sub-alkaline basalts to andesitic basalts and sub-alkaline tholeiitic affinity. The distribution of major and trace elements, as well as rare earth elements (REE),
suggests that these rocks are derived from a source with similar geochemical signature. The analyzed rocks are enriched in
large ion litophile elements (Cs, Rb, Ba, K, Th and U) in relation to elements of high field strength (Nb, Ta, Zr, Hf and Y)
and in relation to REE, Sr, P and Ti, showing weak to medium negative anomalies of Nb, Ta and P and suggesting that these
rocks were generated in a magmatic arc environment. |
| first_indexed | 2024-12-11T17:48:57Z |
| format | Article |
| id | doaj.art-170ee6a50dec46cf995806bf86e72f0d |
| institution | Directory Open Access Journal |
| issn | 1519-874X 2316-9095 |
| language | English |
| last_indexed | 2024-12-11T17:48:57Z |
| publishDate | 2015-03-01 |
| publisher | Universidade de São Paulo |
| record_format | Article |
| series | Geologia USP. Série Científica |
| spelling | doaj.art-170ee6a50dec46cf995806bf86e72f0d2022-12-22T00:56:17ZengUniversidade de São PauloGeologia USP. Série Científica1519-874X2316-90952015-03-01151294410.11606/issn.2316-9095.v15i1p29-44Petrography and geochemistry of metamafic rocks intercalated in gneisses from Goiás Magmatic Arc, region of Indiara (GO)Guillermo Rafael Beltran Navarro0Regiane Andrade Fumes1Antenor Zanardo2Marcos Aurélio Farias de Oliveira3George Luiz Luvizotto4Departamento de Petrologia e Metalogenia, Instituto de Geociências e Ciências Exatas, Universidade Estadual Paulista “Júlio de Mesquita Filho” - UNESP, Avenida 24-A 1.515 - Bela Vista, CEP 13506-900, Rio Claro, SP, BRGraduação em Geologia, Instituto de Geociências e Ciências Exatas, Universidade Estadual Paulista “Júlio de Mesquita Filho” - UNESP, Rio Claro, SP, BRDepartamento de Petrologia e Metalogenia, Instituto de Geociências e Ciências Exatas, Universidade Estadual Paulista “Júlio de Mesquita Filho” - UNESP, Avenida 24-A 1.515 - Bela Vista, CEP 13506-900, Rio Claro, SP, BRDepartamento de Petrologia e Metalogenia, Instituto de Geociências e Ciências Exatas, Universidade Estadual Paulista “Júlio de Mesquita Filho” - UNESP, Avenida 24-A 1.515 - Bela Vista, CEP 13506-900, Rio Claro, SP, BRDepartamento de Petrologia e Metalogenia, Instituto de Geociências e Ciências Exatas, Universidade Estadual Paulista “Júlio de Mesquita Filho” - UNESP, Avenida 24-A 1.515 - Bela Vista, CEP 13506-900, Rio Claro, SP, BRIn Indiara region (GO), dozens of metamafic rocks lenses of various dimensions (metric to kilometric) occur, intercalated in gneisses of the Goiás Magmatic Arc and oriented according to the direction of the main foliation (Sn). These lenses consist of amphibolite (amphibole schists and amphibolites), have chemical compositions of sub-alkaline basalts to andesitic basalts and sub-alkaline tholeiitic affinity. The distribution of major and trace elements, as well as rare earth elements (REE), suggests that these rocks are derived from a source with similar geochemical signature. The analyzed rocks are enriched in large ion litophile elements (Cs, Rb, Ba, K, Th and U) in relation to elements of high field strength (Nb, Ta, Zr, Hf and Y) and in relation to REE, Sr, P and Ti, showing weak to medium negative anomalies of Nb, Ta and P and suggesting that these rocks were generated in a magmatic arc environment.http://ppegeo.igc.usp.br/pdf/guspsc/v15n1/03.pdfBrasília BeltTocantins ProvinceGoiás |
| spellingShingle | Guillermo Rafael Beltran Navarro Regiane Andrade Fumes Antenor Zanardo Marcos Aurélio Farias de Oliveira George Luiz Luvizotto Petrography and geochemistry of metamafic rocks intercalated in gneisses from Goiás Magmatic Arc, region of Indiara (GO) Geologia USP. Série Científica Brasília Belt Tocantins Province Goiás |
| title | Petrography and geochemistry of metamafic rocks intercalated in gneisses from Goiás Magmatic Arc, region of Indiara (GO) |
| title_full | Petrography and geochemistry of metamafic rocks intercalated in gneisses from Goiás Magmatic Arc, region of Indiara (GO) |
| title_fullStr | Petrography and geochemistry of metamafic rocks intercalated in gneisses from Goiás Magmatic Arc, region of Indiara (GO) |
| title_full_unstemmed | Petrography and geochemistry of metamafic rocks intercalated in gneisses from Goiás Magmatic Arc, region of Indiara (GO) |
| title_short | Petrography and geochemistry of metamafic rocks intercalated in gneisses from Goiás Magmatic Arc, region of Indiara (GO) |
| title_sort | petrography and geochemistry of metamafic rocks intercalated in gneisses from goias magmatic arc region of indiara go |
| topic | Brasília Belt Tocantins Province Goiás |
| url | http://ppegeo.igc.usp.br/pdf/guspsc/v15n1/03.pdf |
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