Syn-collisional peraluminous magmatism in the Rio Doce region : mineralogy, geochemistry and isotopic data of the Urucum suite (eastern Minas Gerais state, Brazil).
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Publication Date: | 2000 |
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Format: | Article |
Language: | eng |
Source: | Repositório Institucional da UFOP |
Download full: | http://www.repositorio.ufop.br/handle/123456789/4347 |
Summary: | The Urucum Suite granitoids (Rio Doce region, southeastern Brazil) contains four main facies: megafeldspar granites, deformed medium- to coarse-grained granites, tourmaline, and pegmatitic facies. They intrude both the staurolite-garnet-muscovite-biotite schist of the São Tomé Formation (Rio Doce Group) and the Galiléia metaluminous suite (596 ±4 Ma). Detailed structural studies suggest that the Urucum Suite emplaced during an important dextral strike-slip movement (Dl phase) of the Brasiliano orogeny (650-450Ma). Modal and chemical mineralogical variations suggest an evolution from the megafeldspar facies to the pegmatitic facies. Whole-rock geochemistry indicates the peraluminous character of the Urucum Suite granitoids, the evolution from the megafeldspar facies granites to pegmatitic facies granites and suggests the syn-collisional character of this suite. U-Pb zircon (582 ± 2 Ma) and monazite (576-573 ± 4Ma) data indicate that the Urucum Suite emplaced during the Brasiliano orogeny. The peraluminous nature of the Suite and isotopic-rich character in the Rb-Sr (87Sr/86Sr = 0.7114 to 0.7165) and Sm-Nd (eNd = -7.4 and -8.2) systems indicate that it formed by partial melting of older intermediate to felsic crustal sources. Based on early Proterozoic model-ages (2.3 to 1.8 Ga) and on 2.0 Ga U-Pb inherited signature, granitoids of the Suite are probably derived from a rocks with a long crustal residence (Transamazonian basement), without extensive mantle contribution. |
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Nalini Júnior, Hermínio AriasBilal, EssaidNeves, José Marques Correia2015-01-22T15:10:57Z2015-01-22T15:10:57Z2000NALINI JÚNIOR, H. A.; BILAL, E.; NEVES, J. M. C. Syn-collisional peraluminous magmatism in the Rio Doce region: mineralogy, geochemistry and isotopic data of the Urucum suite (eastern Minas Gerais state, Brazil). Revista Brasileira de Geociências, v. 30, n.1, p. 120-125, 2000. Disponível em: <http://www.sbgeo.org.br/pub_sbg/rbg/vol30_down/3001/3001120.pdf>. Acesso em: 24 set. 2014.2317-4692http://www.repositorio.ufop.br/handle/123456789/4347The Urucum Suite granitoids (Rio Doce region, southeastern Brazil) contains four main facies: megafeldspar granites, deformed medium- to coarse-grained granites, tourmaline, and pegmatitic facies. They intrude both the staurolite-garnet-muscovite-biotite schist of the São Tomé Formation (Rio Doce Group) and the Galiléia metaluminous suite (596 ±4 Ma). Detailed structural studies suggest that the Urucum Suite emplaced during an important dextral strike-slip movement (Dl phase) of the Brasiliano orogeny (650-450Ma). Modal and chemical mineralogical variations suggest an evolution from the megafeldspar facies to the pegmatitic facies. Whole-rock geochemistry indicates the peraluminous character of the Urucum Suite granitoids, the evolution from the megafeldspar facies granites to pegmatitic facies granites and suggests the syn-collisional character of this suite. U-Pb zircon (582 ± 2 Ma) and monazite (576-573 ± 4Ma) data indicate that the Urucum Suite emplaced during the Brasiliano orogeny. The peraluminous nature of the Suite and isotopic-rich character in the Rb-Sr (87Sr/86Sr = 0.7114 to 0.7165) and Sm-Nd (eNd = -7.4 and -8.2) systems indicate that it formed by partial melting of older intermediate to felsic crustal sources. Based on early Proterozoic model-ages (2.3 to 1.8 Ga) and on 2.0 Ga U-Pb inherited signature, granitoids of the Suite are probably derived from a rocks with a long crustal residence (Transamazonian basement), without extensive mantle contribution.GranitoidsPeraluminousGeochemistryIsotopic dataNeoproterozoicSyn-collisional peraluminous magmatism in the Rio Doce region : mineralogy, geochemistry and isotopic data of the Urucum suite (eastern Minas Gerais state, Brazil).info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleOs trabalhos publicados na Revista Brasileira de Geociências são de uso gratuito, com atribuições próprias, para aplicações cientifico-educacionais e não-comerciais. Fonte: Revista Brasileira de Geociências <http://www.ppegeo.igc.usp.br/index.php/rbg/about/submissions#copyrightNotice>. Acesso em: 08 mar. 2017.info:eu-repo/semantics/openAccessengreponame:Repositório Institucional da UFOPinstname:Universidade Federal de Ouro Preto (UFOP)instacron:UFOPLICENSElicense.txtlicense.txttext/plain; charset=utf-81748http://www.repositorio.ufop.br/bitstream/123456789/4347/2/license.txt8a4605be74aa9ea9d79846c1fba20a33MD52ORIGINALARTIGO_SynCollisionalPeraluminous.pdfARTIGO_SynCollisionalPeraluminous.pdfapplication/pdf1007139http://www.repositorio.ufop.br/bitstream/123456789/4347/1/ARTIGO_SynCollisionalPeraluminous.pdfe0cbd7820c6eda77971d3b0353cdd649MD51123456789/43472019-06-12 11:29:00.537oai:localhost:123456789/4347Repositório InstitucionalPUBhttp://www.repositorio.ufop.br/oai/requestrepositorio@ufop.edu.bropendoar:32332019-06-12T15:29Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)false |
dc.title.pt_BR.fl_str_mv |
Syn-collisional peraluminous magmatism in the Rio Doce region : mineralogy, geochemistry and isotopic data of the Urucum suite (eastern Minas Gerais state, Brazil). |
title |
Syn-collisional peraluminous magmatism in the Rio Doce region : mineralogy, geochemistry and isotopic data of the Urucum suite (eastern Minas Gerais state, Brazil). |
spellingShingle |
Syn-collisional peraluminous magmatism in the Rio Doce region : mineralogy, geochemistry and isotopic data of the Urucum suite (eastern Minas Gerais state, Brazil). Nalini Júnior, Hermínio Arias Granitoids Peraluminous Geochemistry Isotopic data Neoproterozoic |
title_short |
Syn-collisional peraluminous magmatism in the Rio Doce region : mineralogy, geochemistry and isotopic data of the Urucum suite (eastern Minas Gerais state, Brazil). |
title_full |
Syn-collisional peraluminous magmatism in the Rio Doce region : mineralogy, geochemistry and isotopic data of the Urucum suite (eastern Minas Gerais state, Brazil). |
title_fullStr |
Syn-collisional peraluminous magmatism in the Rio Doce region : mineralogy, geochemistry and isotopic data of the Urucum suite (eastern Minas Gerais state, Brazil). |
title_full_unstemmed |
Syn-collisional peraluminous magmatism in the Rio Doce region : mineralogy, geochemistry and isotopic data of the Urucum suite (eastern Minas Gerais state, Brazil). |
title_sort |
Syn-collisional peraluminous magmatism in the Rio Doce region : mineralogy, geochemistry and isotopic data of the Urucum suite (eastern Minas Gerais state, Brazil). |
author |
Nalini Júnior, Hermínio Arias |
author_facet |
Nalini Júnior, Hermínio Arias Bilal, Essaid Neves, José Marques Correia |
author_role |
author |
author2 |
Bilal, Essaid Neves, José Marques Correia |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Nalini Júnior, Hermínio Arias Bilal, Essaid Neves, José Marques Correia |
dc.subject.por.fl_str_mv |
Granitoids Peraluminous Geochemistry Isotopic data Neoproterozoic |
topic |
Granitoids Peraluminous Geochemistry Isotopic data Neoproterozoic |
description |
The Urucum Suite granitoids (Rio Doce region, southeastern Brazil) contains four main facies: megafeldspar granites, deformed medium- to coarse-grained granites, tourmaline, and pegmatitic facies. They intrude both the staurolite-garnet-muscovite-biotite schist of the São Tomé Formation (Rio Doce Group) and the Galiléia metaluminous suite (596 ±4 Ma). Detailed structural studies suggest that the Urucum Suite emplaced during an important dextral strike-slip movement (Dl phase) of the Brasiliano orogeny (650-450Ma). Modal and chemical mineralogical variations suggest an evolution from the megafeldspar facies to the pegmatitic facies. Whole-rock geochemistry indicates the peraluminous character of the Urucum Suite granitoids, the evolution from the megafeldspar facies granites to pegmatitic facies granites and suggests the syn-collisional character of this suite. U-Pb zircon (582 ± 2 Ma) and monazite (576-573 ± 4Ma) data indicate that the Urucum Suite emplaced during the Brasiliano orogeny. The peraluminous nature of the Suite and isotopic-rich character in the Rb-Sr (87Sr/86Sr = 0.7114 to 0.7165) and Sm-Nd (eNd = -7.4 and -8.2) systems indicate that it formed by partial melting of older intermediate to felsic crustal sources. Based on early Proterozoic model-ages (2.3 to 1.8 Ga) and on 2.0 Ga U-Pb inherited signature, granitoids of the Suite are probably derived from a rocks with a long crustal residence (Transamazonian basement), without extensive mantle contribution. |
publishDate |
2000 |
dc.date.issued.fl_str_mv |
2000 |
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2015-01-22T15:10:57Z |
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2015-01-22T15:10:57Z |
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info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/article |
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article |
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publishedVersion |
dc.identifier.citation.fl_str_mv |
NALINI JÚNIOR, H. A.; BILAL, E.; NEVES, J. M. C. Syn-collisional peraluminous magmatism in the Rio Doce region: mineralogy, geochemistry and isotopic data of the Urucum suite (eastern Minas Gerais state, Brazil). Revista Brasileira de Geociências, v. 30, n.1, p. 120-125, 2000. Disponível em: <http://www.sbgeo.org.br/pub_sbg/rbg/vol30_down/3001/3001120.pdf>. Acesso em: 24 set. 2014. |
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http://www.repositorio.ufop.br/handle/123456789/4347 |
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2317-4692 |
identifier_str_mv |
NALINI JÚNIOR, H. A.; BILAL, E.; NEVES, J. M. C. Syn-collisional peraluminous magmatism in the Rio Doce region: mineralogy, geochemistry and isotopic data of the Urucum suite (eastern Minas Gerais state, Brazil). Revista Brasileira de Geociências, v. 30, n.1, p. 120-125, 2000. Disponível em: <http://www.sbgeo.org.br/pub_sbg/rbg/vol30_down/3001/3001120.pdf>. Acesso em: 24 set. 2014. 2317-4692 |
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