Neoproterozoic anorogenic magmatism in the Southern Bahia Alkaline Province of NE Brazil: U–Pb and Pb–Pb ages of the blue sodalite syenites
| Autor(a) principal: | |
|---|---|
| Data de Publicação: | 2007 |
| Outros Autores: | , , , , , , , |
| Tipo de documento: | Artigo |
| Idioma: | eng |
| Título da fonte: | Repositório Institucional da UFBA |
| Texto Completo: | http://www.repositorio.ufba.br/ri/handle/ri/5144 |
Resumo: | p. 88–97 |
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Rosa, Maria de Lourdes da SilvaConceição, HerbetMacambira, Moacir José BuenanoGalarza, Marco AntonioCunha, Mônica Pringsheim daMenezes, Rita Cunha LealMarinho, Moacyr MouraCruz Filho, Basílio Elesbão daRios, Débora CorreiaRosa, Maria de Lourdes da SilvaConceição, HerbetMacambira, Moacir José BuenanoGalarza, Marco AntonioCunha, Mônica Pringsheim daMenezes, Rita Cunha LealMarinho, Moacyr MouraCruz Filho, Basílio Elesbão daRios, Débora Correia2012-01-12T17:02:17Z2012-01-12T17:02:17Z20070024-4937http://www.repositorio.ufba.br/ri/handle/ri/5144v. 97p. 88–97Blue sodalite syenite is a rare rock, and the Southern Bahia Alkaline Province (SBAP) is the only place in Brazil where economic deposits are found. This province forms part of the Archaean to Paleoproterozoic São Francisco craton, and contains a few batholiths, a large number of stocks and hundreds of dykes. Its southern part lies close to the tectonic contact between the craton and the Neoproterozoic Araçuaí mobile melt. Blue sodalite-bearing syenites are found in almost all the igneous bodies of the SBAP as dykes or pegmatitic masses hosted by nepheline syenite. Economically viable quantities for the production of dimension stones are found only in the Floresta Azul alkaline complex, the Itaju do Colônia and Rio Pardo stocks and the Itarantim batholith. U–Pb ages obtained for titanite from Itaju do Colônia (732±8 Ma) and Rio Pardo (714±8) and Pb–Pb evaporation ages of zircon from Floresta Azul (696±3 Ma) and Itarantim (722±5 Ma). The geochronology of the SBAP shows that the anorogenic alkaline magmatism persisted for at least 58 Ma, demonstrating an extensional tectonic environment in the southern part of the São Francisco craton at this time. The data show that the rift phase which preceded the formation of the Araçuaí orogen was active until at least 700 Ma. The reported ages are similar to those found for the nepheline syenite host bodies, which supports the conclusions of the previous petrologic study demonstrating that blue sodalite is formed during the crystallization of these bodies. Two different processes are involved. In the magmatic process, sodalite occurs as disseminated and interstitial crystals among alkali feldspar crystals, and is associated with calcite and cancrinite formed by destabilization of nepheline. In the metasomatic process, discontinuous bands of sodalite are in sharp contact with nepheline syenite pegmatite, and its crystal aggregates often contain relict textures of nepheline and albite been replaced by sodalite.Submitted by Ana Valéria de Jesus Moura (anavaleria_131@hotmail.com) on 2012-01-12T17:02:17Z No. of bitstreams: 1 s2.0-S0024493706003288-main.pdf: 736387 bytes, checksum: 56bac0bddc989c4749eb095022cf2215 (MD5)Made available in DSpace on 2012-01-12T17:02:17Z (GMT). No. of bitstreams: 1 s2.0-S0024493706003288-main.pdf: 736387 bytes, checksum: 56bac0bddc989c4749eb095022cf2215 (MD5) Previous issue date: 2007Blue sodaliteSyeniteNeoproterozoicAnorogenic magmatismBrazilNeoproterozoic anorogenic magmatism in the Southern Bahia Alkaline Province of NE Brazil: U–Pb and Pb–Pb ages of the blue sodalite syenitesLithosinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleengreponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAinfo:eu-repo/semantics/openAccessORIGINALs2.0-S0024493706003288-main.pdfs2.0-S0024493706003288-main.pdfapplication/pdf736387https://repositorio.ufba.br/bitstream/ri/5144/1/s2.0-S0024493706003288-main.pdf56bac0bddc989c4749eb095022cf2215MD51LICENSElicense.txtlicense.txttext/plain1762https://repositorio.ufba.br/bitstream/ri/5144/2/license.txt1b89a9a0548218172d7c829f87a0eab9MD52TEXTs2.0-S0024493706003288-main.pdf.txts2.0-S0024493706003288-main.pdf.txtExtracted texttext/plain39878https://repositorio.ufba.br/bitstream/ri/5144/3/s2.0-S0024493706003288-main.pdf.txtd5bc6b62263ba4ba2cd9e065835126acMD53ri/51442022-07-05 14:03:20.198oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:03:20Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false |
| dc.title.pt_BR.fl_str_mv |
Neoproterozoic anorogenic magmatism in the Southern Bahia Alkaline Province of NE Brazil: U–Pb and Pb–Pb ages of the blue sodalite syenites |
| dc.title.alternative.pt_BR.fl_str_mv |
Lithos |
| title |
Neoproterozoic anorogenic magmatism in the Southern Bahia Alkaline Province of NE Brazil: U–Pb and Pb–Pb ages of the blue sodalite syenites |
| spellingShingle |
Neoproterozoic anorogenic magmatism in the Southern Bahia Alkaline Province of NE Brazil: U–Pb and Pb–Pb ages of the blue sodalite syenites Rosa, Maria de Lourdes da Silva Blue sodalite Syenite Neoproterozoic Anorogenic magmatism Brazil |
| title_short |
Neoproterozoic anorogenic magmatism in the Southern Bahia Alkaline Province of NE Brazil: U–Pb and Pb–Pb ages of the blue sodalite syenites |
| title_full |
Neoproterozoic anorogenic magmatism in the Southern Bahia Alkaline Province of NE Brazil: U–Pb and Pb–Pb ages of the blue sodalite syenites |
| title_fullStr |
Neoproterozoic anorogenic magmatism in the Southern Bahia Alkaline Province of NE Brazil: U–Pb and Pb–Pb ages of the blue sodalite syenites |
| title_full_unstemmed |
Neoproterozoic anorogenic magmatism in the Southern Bahia Alkaline Province of NE Brazil: U–Pb and Pb–Pb ages of the blue sodalite syenites |
| title_sort |
Neoproterozoic anorogenic magmatism in the Southern Bahia Alkaline Province of NE Brazil: U–Pb and Pb–Pb ages of the blue sodalite syenites |
| author |
Rosa, Maria de Lourdes da Silva |
| author_facet |
Rosa, Maria de Lourdes da Silva Conceição, Herbet Macambira, Moacir José Buenano Galarza, Marco Antonio Cunha, Mônica Pringsheim da Menezes, Rita Cunha Leal Marinho, Moacyr Moura Cruz Filho, Basílio Elesbão da Rios, Débora Correia |
| author_role |
author |
| author2 |
Conceição, Herbet Macambira, Moacir José Buenano Galarza, Marco Antonio Cunha, Mônica Pringsheim da Menezes, Rita Cunha Leal Marinho, Moacyr Moura Cruz Filho, Basílio Elesbão da Rios, Débora Correia |
| author2_role |
author author author author author author author author |
| dc.contributor.author.fl_str_mv |
Rosa, Maria de Lourdes da Silva Conceição, Herbet Macambira, Moacir José Buenano Galarza, Marco Antonio Cunha, Mônica Pringsheim da Menezes, Rita Cunha Leal Marinho, Moacyr Moura Cruz Filho, Basílio Elesbão da Rios, Débora Correia Rosa, Maria de Lourdes da Silva Conceição, Herbet Macambira, Moacir José Buenano Galarza, Marco Antonio Cunha, Mônica Pringsheim da Menezes, Rita Cunha Leal Marinho, Moacyr Moura Cruz Filho, Basílio Elesbão da Rios, Débora Correia |
| dc.subject.por.fl_str_mv |
Blue sodalite Syenite Neoproterozoic Anorogenic magmatism Brazil |
| topic |
Blue sodalite Syenite Neoproterozoic Anorogenic magmatism Brazil |
| description |
p. 88–97 |
| publishDate |
2007 |
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2007 |
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2012-01-12T17:02:17Z |
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2012-01-12T17:02:17Z |
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0024-4937 |
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v. 97 |
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0024-4937 v. 97 |
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