Isotopic and geochemical constraints for a Paleoproterozoic accretionary orogen in the Borborema Province, NE Brazil: implications for reconstructing Nuna/Columbia

Detalhes bibliográficos
Autor(a) principal: Santos, Lauro Cézar M. de Lira
Data de Publicação: 2021
Outros Autores: Lages, Geysson A., Caxito, Fabrício A., Dantas, Elton Luiz, Cawood, Peter A., Lima, Haroldo M., Lima, Felipe J. da Cruz
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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spelling 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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