Geochronology of granulites from the south Itabuna-Salvador-Curaçá Block, São Francisco Craton (Brazil): Nd isotopes and UePb zircon ages
| Autor(a) principal: | |
|---|---|
| Data de Publicação: | 2011 |
| 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/5168 |
Resumo: | p.397-413 |
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Peucat, Jean-JacquesBarbosa, Johildo Salomão FigueirêdoPinho, Ivana Conceição de AraújoPaquette, Jean-LouisMartin, HervéFanning, C. MarkLeal, Angela Beatriz de MenezesCruz, Simone Cerqueira PereiraPeucat, Jean-JacquesBarbosa, Johildo Salomão FigueirêdoPinho, Ivana Conceição de AraújoPaquette, Jean-LouisMartin, HervéFanning, C. MarkLeal, Angela Beatriz de MenezesCruz, Simone Cerqueira Pereira2012-01-13T11:19:25Z2012-01-13T11:19:25Z20110895-9811http://www.repositorio.ufba.br/ri/handle/ri/5168v. 31p.397-413This work provides five new UePb zircon dating and the corresponding Nd isotope data for felsic granulites from the south Itabuna-Salvador-Curaçá Block (ISCB), in the São Francisco Craton, Brazil. Three major sets of felsic granulites can be recognised. The oldest set is tonalitic in composition and of TTG affinity. It is Archaean in age with magmatic zircon cores dated at 2675 _ 11 Ma by LA-ICPMS and up to ca 2.7e2.9 Ga by SHRIMP on an other sample. It exhibits epsilon Nd values between _8 and _11 at 2.1 Ga. This Nd signature is similar to that of granulites found in the western Archaean Jequié Block. Cartographically, this set of Archaean terrains represents at least 50% of the granulites in the studied area. The second set corresponds to a alaeoproterozoic calc-alkaline tonalitic suite with zircon ages from 2019 _ 19 Ma to 2191 _ 10 Ma and epsilon Nd values between _3 and _4 at 2.1 Ga, corresponding partially to a newly formed crust. The third set of granulites is also Palaeoproterozoic. It is shoshonitic to monzonitic in composition and synchronous with the high grade metamorphism dated by metamorphic zircons at 2086 _ 7 Ma (average of five samples). The Nd isotope signature for this alkaline set is similar to that of the Palaeoproterozoic calc-alkaline one. Nd isotopes appear to be a very efficient tool to distinguish Archaean from Palaeoproterozoic felsic protoliths in granulitic suites of the Itabuna-Salvador- Curaçá Block (ISCB). Finally, the southern part of the ISCB is composed of a mixture of Archaean and Palaeoproterozoic protoliths, in similar amounts, suggesting that it was probably an active margin between 2.1 and 2.2 Ga located on the eastern border of the Archaean Jequié Block. A major crustal thickening process occurred at ca 2.09 Ga in the ISCB and seems significantly younger towards the west, in the Jequié granulites, where an average of 2056 _ 9 Ma is determined for the high grade event.Submitted by Ana Valéria de Jesus Moura (anavaleria_131@hotmail.com) on 2012-01-13T11:19:25Z No. of bitstreams: 1 s2.0-S0895981111000332-main.pdf: 3317938 bytes, checksum: 9100591a6117c68cae10725ba48231a7 (MD5)Made available in DSpace on 2012-01-13T11:19:25Z (GMT). No. of bitstreams: 1 s2.0-S0895981111000332-main.pdf: 3317938 bytes, checksum: 9100591a6117c68cae10725ba48231a7 (MD5) Previous issue date: 2011Nd isotopesZircon SHRIMP and LA-ICPMS datingArchaean and PalaeoproterozoicBahia StateGeochronology of granulites from the south Itabuna-Salvador-Curaçá Block, São Francisco Craton (Brazil): Nd isotopes and UePb zircon agesJournal of South American Earth Sciencesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleengreponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAinfo:eu-repo/semantics/openAccessORIGINALs2.0-S0895981111000332-main.pdfs2.0-S0895981111000332-main.pdfapplication/pdf3317938https://repositorio.ufba.br/bitstream/ri/5168/1/s2.0-S0895981111000332-main.pdf9100591a6117c68cae10725ba48231a7MD51LICENSElicense.txtlicense.txttext/plain1762https://repositorio.ufba.br/bitstream/ri/5168/2/license.txt1b89a9a0548218172d7c829f87a0eab9MD52TEXTs2.0-S0895981111000332-main.pdf.txts2.0-S0895981111000332-main.pdf.txtExtracted texttext/plain66003https://repositorio.ufba.br/bitstream/ri/5168/3/s2.0-S0895981111000332-main.pdf.txt811f99f6612b52c376d45794206cf01dMD53ri/51682022-07-05 14:03:17.646oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:03:17Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false |
| dc.title.pt_BR.fl_str_mv |
Geochronology of granulites from the south Itabuna-Salvador-Curaçá Block, São Francisco Craton (Brazil): Nd isotopes and UePb zircon ages |
| dc.title.alternative.pt_BR.fl_str_mv |
Journal of South American Earth Sciences |
| title |
Geochronology of granulites from the south Itabuna-Salvador-Curaçá Block, São Francisco Craton (Brazil): Nd isotopes and UePb zircon ages |
| spellingShingle |
Geochronology of granulites from the south Itabuna-Salvador-Curaçá Block, São Francisco Craton (Brazil): Nd isotopes and UePb zircon ages Peucat, Jean-Jacques Nd isotopes Zircon SHRIMP and LA-ICPMS dating Archaean and Palaeoproterozoic Bahia State |
| title_short |
Geochronology of granulites from the south Itabuna-Salvador-Curaçá Block, São Francisco Craton (Brazil): Nd isotopes and UePb zircon ages |
| title_full |
Geochronology of granulites from the south Itabuna-Salvador-Curaçá Block, São Francisco Craton (Brazil): Nd isotopes and UePb zircon ages |
| title_fullStr |
Geochronology of granulites from the south Itabuna-Salvador-Curaçá Block, São Francisco Craton (Brazil): Nd isotopes and UePb zircon ages |
| title_full_unstemmed |
Geochronology of granulites from the south Itabuna-Salvador-Curaçá Block, São Francisco Craton (Brazil): Nd isotopes and UePb zircon ages |
| title_sort |
Geochronology of granulites from the south Itabuna-Salvador-Curaçá Block, São Francisco Craton (Brazil): Nd isotopes and UePb zircon ages |
| author |
Peucat, Jean-Jacques |
| author_facet |
Peucat, Jean-Jacques Barbosa, Johildo Salomão Figueirêdo Pinho, Ivana Conceição de Araújo Paquette, Jean-Louis Martin, Hervé Fanning, C. Mark Leal, Angela Beatriz de Menezes Cruz, Simone Cerqueira Pereira |
| author_role |
author |
| author2 |
Barbosa, Johildo Salomão Figueirêdo Pinho, Ivana Conceição de Araújo Paquette, Jean-Louis Martin, Hervé Fanning, C. Mark Leal, Angela Beatriz de Menezes Cruz, Simone Cerqueira Pereira |
| author2_role |
author author author author author author author |
| dc.contributor.author.fl_str_mv |
Peucat, Jean-Jacques Barbosa, Johildo Salomão Figueirêdo Pinho, Ivana Conceição de Araújo Paquette, Jean-Louis Martin, Hervé Fanning, C. Mark Leal, Angela Beatriz de Menezes Cruz, Simone Cerqueira Pereira Peucat, Jean-Jacques Barbosa, Johildo Salomão Figueirêdo Pinho, Ivana Conceição de Araújo Paquette, Jean-Louis Martin, Hervé Fanning, C. Mark Leal, Angela Beatriz de Menezes Cruz, Simone Cerqueira Pereira |
| dc.subject.por.fl_str_mv |
Nd isotopes Zircon SHRIMP and LA-ICPMS dating Archaean and Palaeoproterozoic Bahia State |
| topic |
Nd isotopes Zircon SHRIMP and LA-ICPMS dating Archaean and Palaeoproterozoic Bahia State |
| description |
p.397-413 |
| publishDate |
2011 |
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2011 |
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2012-01-13T11:19:25Z |
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2012-01-13T11:19:25Z |
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0895-9811 |
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v. 31 |
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0895-9811 v. 31 |
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