Isotopic and geochemical constraints for a Paleoproterozoic accretionary orogen in the Borborema Province, NE Brazil: implications for reconstructing Nuna/Columbia
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da Universidade Federal do Ceará (UFC) |
dARK ID: | ark:/83112/001300000sk02 |
Texto Completo: | http://www.repositorio.ufc.br/handle/riufc/64620 |
Resumo: | The Alto Moxotó Terrane of the Borborema Province presents a wide exposure of Paleoproterozoic crust, but unlike other continental blocks of South America, its orogenic history is strongly obliterated by late Neoproterozoic deformation. New isotopic and geochemical studies were conducted in mafic-ultramafic (Fazenda Carmo Suite) and granitic-gneissic rocks (Riacho do Navio Suite) within the terrane. The former present zircon U-Pb crystallization ages at ca. 2.13 Ga, whereas Sm-Nd data suggests a juvenile origin via melting of early Paleoproterozoic to Archean peridotitic sources. Geochemical data for these rocks are compatible with tholeiitic magmas with some degree of crustal contamination and trace element distribution points to a continental-arc related setting interpreted as remnants of the early stages of subduction. In contrast, the Riacho do Navio Suite was emplaced at ca. 2.08 Ga and has highly negative εNd(t) values indicating crustal reworking. The suite displays calc-alkali to alkali-calcic and ferroan geochemical signatures compatible with Cordilleran magmas. In addition, traceelement distribution as well as discriminant diagrams suggest that the precursor magmas were generated during the later stages of a continental arc or in a syn-collisional setting. Based on our results, we suggest that the studied units might represent missing pieces of a Paleoproterozoic accretionary orogen that formed the crustal framework of the Alto Moxotó Terrane, and that this represents a block associated with assembly of the Nuna/Columbia supercontinent, which is now largely hidden within the Neoproterozoic orogenic belts of West Gondwana. |
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Isotopic and geochemical constraints for a Paleoproterozoic accretionary orogen in the Borborema Province, NE Brazil: implications for reconstructing Nuna/ColumbiaPaleoproterozoic accretionary-collisional eventEarly orogenic and syn-collisional magmatismPaleoproterozoic inlier within West GondwanaNuna/Columbia SupercontinentThe Alto Moxotó Terrane of the Borborema Province presents a wide exposure of Paleoproterozoic crust, but unlike other continental blocks of South America, its orogenic history is strongly obliterated by late Neoproterozoic deformation. New isotopic and geochemical studies were conducted in mafic-ultramafic (Fazenda Carmo Suite) and granitic-gneissic rocks (Riacho do Navio Suite) within the terrane. The former present zircon U-Pb crystallization ages at ca. 2.13 Ga, whereas Sm-Nd data suggests a juvenile origin via melting of early Paleoproterozoic to Archean peridotitic sources. Geochemical data for these rocks are compatible with tholeiitic magmas with some degree of crustal contamination and trace element distribution points to a continental-arc related setting interpreted as remnants of the early stages of subduction. In contrast, the Riacho do Navio Suite was emplaced at ca. 2.08 Ga and has highly negative εNd(t) values indicating crustal reworking. The suite displays calc-alkali to alkali-calcic and ferroan geochemical signatures compatible with Cordilleran magmas. In addition, traceelement distribution as well as discriminant diagrams suggest that the precursor magmas were generated during the later stages of a continental arc or in a syn-collisional setting. Based on our results, we suggest that the studied units might represent missing pieces of a Paleoproterozoic accretionary orogen that formed the crustal framework of the Alto Moxotó Terrane, and that this represents a block associated with assembly of the Nuna/Columbia supercontinent, which is now largely hidden within the Neoproterozoic orogenic belts of West Gondwana.Geoscience Frontiers2022-03-28T16:58:37Z2022-03-28T16:58:37Z2021info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfLauro Cézar M. de Lira Santos et al. Isotopic and geochemical constraints for a Paleoproterozoic accretionary orogen in the Borborema Province, NE Brazil: Implications for reconstructing Nuna/Columbia. Geoscience Frontiers, Beijing-China, n. 101167, p.1-18, 2021.1674-9871http://www.repositorio.ufc.br/handle/riufc/64620ark:/83112/001300000sk02Santos, Lauro Cézar M. de LiraLages, Geysson A.Caxito, Fabrício A.Dantas, Elton LuizCawood, Peter A.Lima, Haroldo M.Lima, Felipe J. da Cruzinfo:eu-repo/semantics/openAccessporreponame:Repositório Institucional da Universidade Federal do Ceará (UFC)instname:Universidade Federal do Ceará (UFC)instacron:UFC2023-10-10T17:23:51Zoai:repositorio.ufc.br:riufc/64620Repositório InstitucionalPUBhttp://www.repositorio.ufc.br/ri-oai/requestbu@ufc.br || repositorio@ufc.bropendoar:2024-09-11T18:17:06.674250Repositório Institucional da Universidade Federal do Ceará (UFC) - Universidade Federal do Ceará (UFC)false |
dc.title.none.fl_str_mv |
Isotopic and geochemical constraints for a Paleoproterozoic accretionary orogen in the Borborema Province, NE Brazil: implications for reconstructing Nuna/Columbia |
title |
Isotopic and geochemical constraints for a Paleoproterozoic accretionary orogen in the Borborema Province, NE Brazil: implications for reconstructing Nuna/Columbia |
spellingShingle |
Isotopic and geochemical constraints for a Paleoproterozoic accretionary orogen in the Borborema Province, NE Brazil: implications for reconstructing Nuna/Columbia Santos, Lauro Cézar M. de Lira Paleoproterozoic accretionary-collisional event Early orogenic and syn-collisional magmatism Paleoproterozoic inlier within West Gondwana Nuna/Columbia Supercontinent |
title_short |
Isotopic and geochemical constraints for a Paleoproterozoic accretionary orogen in the Borborema Province, NE Brazil: implications for reconstructing Nuna/Columbia |
title_full |
Isotopic and geochemical constraints for a Paleoproterozoic accretionary orogen in the Borborema Province, NE Brazil: implications for reconstructing Nuna/Columbia |
title_fullStr |
Isotopic and geochemical constraints for a Paleoproterozoic accretionary orogen in the Borborema Province, NE Brazil: implications for reconstructing Nuna/Columbia |
title_full_unstemmed |
Isotopic and geochemical constraints for a Paleoproterozoic accretionary orogen in the Borborema Province, NE Brazil: implications for reconstructing Nuna/Columbia |
title_sort |
Isotopic and geochemical constraints for a Paleoproterozoic accretionary orogen in the Borborema Province, NE Brazil: implications for reconstructing Nuna/Columbia |
author |
Santos, Lauro Cézar M. de Lira |
author_facet |
Santos, Lauro Cézar M. de Lira Lages, Geysson A. Caxito, Fabrício A. Dantas, Elton Luiz Cawood, Peter A. Lima, Haroldo M. Lima, Felipe J. da Cruz |
author_role |
author |
author2 |
Lages, Geysson A. Caxito, Fabrício A. Dantas, Elton Luiz Cawood, Peter A. Lima, Haroldo M. Lima, Felipe J. da Cruz |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Santos, Lauro Cézar M. de Lira Lages, Geysson A. Caxito, Fabrício A. Dantas, Elton Luiz Cawood, Peter A. Lima, Haroldo M. Lima, Felipe J. da Cruz |
dc.subject.por.fl_str_mv |
Paleoproterozoic accretionary-collisional event Early orogenic and syn-collisional magmatism Paleoproterozoic inlier within West Gondwana Nuna/Columbia Supercontinent |
topic |
Paleoproterozoic accretionary-collisional event Early orogenic and syn-collisional magmatism Paleoproterozoic inlier within West Gondwana Nuna/Columbia Supercontinent |
description |
The Alto Moxotó Terrane of the Borborema Province presents a wide exposure of Paleoproterozoic crust, but unlike other continental blocks of South America, its orogenic history is strongly obliterated by late Neoproterozoic deformation. New isotopic and geochemical studies were conducted in mafic-ultramafic (Fazenda Carmo Suite) and granitic-gneissic rocks (Riacho do Navio Suite) within the terrane. The former present zircon U-Pb crystallization ages at ca. 2.13 Ga, whereas Sm-Nd data suggests a juvenile origin via melting of early Paleoproterozoic to Archean peridotitic sources. Geochemical data for these rocks are compatible with tholeiitic magmas with some degree of crustal contamination and trace element distribution points to a continental-arc related setting interpreted as remnants of the early stages of subduction. In contrast, the Riacho do Navio Suite was emplaced at ca. 2.08 Ga and has highly negative εNd(t) values indicating crustal reworking. The suite displays calc-alkali to alkali-calcic and ferroan geochemical signatures compatible with Cordilleran magmas. In addition, traceelement distribution as well as discriminant diagrams suggest that the precursor magmas were generated during the later stages of a continental arc or in a syn-collisional setting. Based on our results, we suggest that the studied units might represent missing pieces of a Paleoproterozoic accretionary orogen that formed the crustal framework of the Alto Moxotó Terrane, and that this represents a block associated with assembly of the Nuna/Columbia supercontinent, which is now largely hidden within the Neoproterozoic orogenic belts of West Gondwana. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021 2022-03-28T16:58:37Z 2022-03-28T16:58:37Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Lauro Cézar M. de Lira Santos et al. Isotopic and geochemical constraints for a Paleoproterozoic accretionary orogen in the Borborema Province, NE Brazil: Implications for reconstructing Nuna/Columbia. Geoscience Frontiers, Beijing-China, n. 101167, p.1-18, 2021. 1674-9871 http://www.repositorio.ufc.br/handle/riufc/64620 |
dc.identifier.dark.fl_str_mv |
ark:/83112/001300000sk02 |
identifier_str_mv |
Lauro Cézar M. de Lira Santos et al. Isotopic and geochemical constraints for a Paleoproterozoic accretionary orogen in the Borborema Province, NE Brazil: Implications for reconstructing Nuna/Columbia. Geoscience Frontiers, Beijing-China, n. 101167, p.1-18, 2021. 1674-9871 ark:/83112/001300000sk02 |
url |
http://www.repositorio.ufc.br/handle/riufc/64620 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Geoscience Frontiers |
publisher.none.fl_str_mv |
Geoscience Frontiers |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da Universidade Federal do Ceará (UFC) instname:Universidade Federal do Ceará (UFC) instacron:UFC |
instname_str |
Universidade Federal do Ceará (UFC) |
instacron_str |
UFC |
institution |
UFC |
reponame_str |
Repositório Institucional da Universidade Federal do Ceará (UFC) |
collection |
Repositório Institucional da Universidade Federal do Ceará (UFC) |
repository.name.fl_str_mv |
Repositório Institucional da Universidade Federal do Ceará (UFC) - Universidade Federal do Ceará (UFC) |
repository.mail.fl_str_mv |
bu@ufc.br || repositorio@ufc.br |
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1818373831598800896 |