Paleoproterozoic accretionary and collisional processes and the build-up of the Borborema Province (NE Brazil): Geochronological and geochemical evidence from the Central Domain

Detalhes bibliográficos
Autor(a) principal: NEVES, Sérgio P.
Data de Publicação: 2015
Outros Autores: LAGES, Geysson A., BRASILINO, Roberta G., MIRANDA, Alan W.A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional de Geociências - RIGEO
Texto Completo: https://rigeo.cprm.gov.br/handle/doc/16659
Resumo: Several Brasiliano-Pan-African belts consist of large areas of reworked Paleoproterozoic rocks. Characterization of these rocks is needed to place better controls on Precambrian paleogeographic reconstructions. The Borborema Province, northeastern Brazil, occupies a central position in West Gondwana configuration, and knowledge of its geological evolution is crucial to infer relationships between Paleoproterozoic units in South America and Africa. Here, we report UePb ages, major- and trace-elements analyses and SmeNd isotopic data for orthogneisses in the eastern portion of Central Domain. The dominant basement units in the study area are banded gneisses of intermediate composition and relatively juvenile character, and migmatitic gneisses of granitic composition with Archean Nd TDM model ages. One sample of the banded gneiss yielded a weighted 207Pb/206Pb age of 2096 ± 23 Ma and an upper intercept age of 2044 ± 27 Ma, which we interpret, respectively, as ages of crystallization and metamorphism. Two large units of migmatitic gneiss in the southern and central parts of the area gave ages of, respectively, 2057 ± 20 Ma and 2055 ± 23 Ma; an orthoamphibolite associated with the latter yielded crystallization age of 2042 ± 11 Ma and metamorphic age of 1996 ± 13 Ma. All these rocks have geochemical signatures typical of subduction zone-related magmas. Combined with evidence provided by previous studies, we suggest that the evolution of the study area starts with island arc construction around 2.2 Ga, leading to an expressive volcanic arc edifice by 2.13 e2.10 Ga. By 2.06 Ga, the crust had evolved enough to become intruded by magmas formed at the mantle wedge of the now largely continental magmatic arc, which continued to be intruded by mantle melts until at least 2.04 Ga. An augen gneiss in the northern part of the area, with an age of 2109 ± 15 Ma, and a migmatitic gneiss with a much older age (2183 ± 9 Ma), both of which have geochemical characteristics akin to intraplate magmas, suggest that crustal reworking also took place. The 1981 ± 23 Ma age of a small body of peraluminous felsic gneiss may be related to regional metamorphism and syncollisional magmatism at c. 2.0e1.98 Ga.
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spelling NEVES, Sérgio P.LAGES, Geysson A.BRASILINO, Roberta G.MIRANDA, Alan W.A.2016-08-26T12:58:17Z2016-08-26T12:58:17Z2015NEVES, Sérgio P. et al. Paleoproterozoic accretionary and collisional processes and the build-up of the Borborema Province (NE Brazil): Geochronological and geochemical evidence from the Central Domain. Journal of South American Earth Sciences, Oxford, v. 58, p. 165-187, Mar. 2015.0895-9811https://rigeo.cprm.gov.br/handle/doc/16659Several Brasiliano-Pan-African belts consist of large areas of reworked Paleoproterozoic rocks. Characterization of these rocks is needed to place better controls on Precambrian paleogeographic reconstructions. The Borborema Province, northeastern Brazil, occupies a central position in West Gondwana configuration, and knowledge of its geological evolution is crucial to infer relationships between Paleoproterozoic units in South America and Africa. Here, we report UePb ages, major- and trace-elements analyses and SmeNd isotopic data for orthogneisses in the eastern portion of Central Domain. The dominant basement units in the study area are banded gneisses of intermediate composition and relatively juvenile character, and migmatitic gneisses of granitic composition with Archean Nd TDM model ages. One sample of the banded gneiss yielded a weighted 207Pb/206Pb age of 2096 ± 23 Ma and an upper intercept age of 2044 ± 27 Ma, which we interpret, respectively, as ages of crystallization and metamorphism. Two large units of migmatitic gneiss in the southern and central parts of the area gave ages of, respectively, 2057 ± 20 Ma and 2055 ± 23 Ma; an orthoamphibolite associated with the latter yielded crystallization age of 2042 ± 11 Ma and metamorphic age of 1996 ± 13 Ma. All these rocks have geochemical signatures typical of subduction zone-related magmas. Combined with evidence provided by previous studies, we suggest that the evolution of the study area starts with island arc construction around 2.2 Ga, leading to an expressive volcanic arc edifice by 2.13 e2.10 Ga. By 2.06 Ga, the crust had evolved enough to become intruded by magmas formed at the mantle wedge of the now largely continental magmatic arc, which continued to be intruded by mantle melts until at least 2.04 Ga. An augen gneiss in the northern part of the area, with an age of 2109 ± 15 Ma, and a migmatitic gneiss with a much older age (2183 ± 9 Ma), both of which have geochemical characteristics akin to intraplate magmas, suggest that crustal reworking also took place. The 1981 ± 23 Ma age of a small body of peraluminous felsic gneiss may be related to regional metamorphism and syncollisional magmatism at c. 2.0e1.98 Ga.ElsevierGEOQUÍMICAISÓTOPOS DE NDGEOCRONOLOGIA U-PBEVOLUÇÃO CRUSTALPALEOPROTEROZÓICOPROVÍNCIA BORBOREMANORDESTEBRASILPaleoproterozoic accretionary and collisional processes and the build-up of the Borborema Province (NE Brazil): Geochronological and geochemical evidence from the Central Domaininfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleOxfordinfo:eu-repo/semantics/openAccessengreponame:Repositório Institucional de Geociências - RIGEOinstname:Companhia de Pesquisa de Recursos Minerais (CPRM)instacron:CPRMORIGINALart_paleoprot_geochr_geoch_borborema.pdfart_paleoprot_geochr_geoch_borborema.pdfproducao institucionalapplication/pdf6620269http://rigeo.cprm.gov.br/jspui/bitstream/doc/16659/1/art_paleoprot_geochr_geoch_borborema.pdf2038667062e388f484f4d7c66fc28f81MD51LICENSElicense.txtlicense.txttext/plain; charset=utf-82317http://rigeo.cprm.gov.br/jspui/bitstream/doc/16659/2/license.txtbb1fb6513dc5ea9153aaac2c565a7d35MD52TEXTart_paleoprot_geochr_geoch_borborema.pdf.txtart_paleoprot_geochr_geoch_borborema.pdf.txtExtracted texttext/plain104557http://rigeo.cprm.gov.br/jspui/bitstream/doc/16659/3/art_paleoprot_geochr_geoch_borborema.pdf.txtdd28d89d93ce216a5eab108de58748bfMD53THUMBNAILart_paleoprot_geochr_geoch_borborema.pdf.jpgart_paleoprot_geochr_geoch_borborema.pdf.jpgGenerated Thumbnailimage/jpeg1703http://rigeo.cprm.gov.br/jspui/bitstream/doc/16659/4/art_paleoprot_geochr_geoch_borborema.pdf.jpg09116b9cf6e404a154473084b42bcdd9MD54doc/166592023-02-13 11:13:15.591oai:rigeo.sgb.gov.br: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Repositório InstitucionalONGhttps://rigeo.sgb.gov.br/oai/request https://rigeo.cprm.gov.br/oai/requestrigeo@sgb.gov.bropendoar:2023-02-13T14:13:15Repositório Institucional de Geociências - 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dc.title.pt_BR.fl_str_mv Paleoproterozoic accretionary and collisional processes and the build-up of the Borborema Province (NE Brazil): Geochronological and geochemical evidence from the Central Domain
title Paleoproterozoic accretionary and collisional processes and the build-up of the Borborema Province (NE Brazil): Geochronological and geochemical evidence from the Central Domain
spellingShingle Paleoproterozoic accretionary and collisional processes and the build-up of the Borborema Province (NE Brazil): Geochronological and geochemical evidence from the Central Domain
NEVES, Sérgio P.
GEOQUÍMICA
ISÓTOPOS DE ND
GEOCRONOLOGIA U-PB
EVOLUÇÃO CRUSTAL
PALEOPROTEROZÓICO
PROVÍNCIA BORBOREMA
NORDESTE
BRASIL
title_short Paleoproterozoic accretionary and collisional processes and the build-up of the Borborema Province (NE Brazil): Geochronological and geochemical evidence from the Central Domain
title_full Paleoproterozoic accretionary and collisional processes and the build-up of the Borborema Province (NE Brazil): Geochronological and geochemical evidence from the Central Domain
title_fullStr Paleoproterozoic accretionary and collisional processes and the build-up of the Borborema Province (NE Brazil): Geochronological and geochemical evidence from the Central Domain
title_full_unstemmed Paleoproterozoic accretionary and collisional processes and the build-up of the Borborema Province (NE Brazil): Geochronological and geochemical evidence from the Central Domain
title_sort Paleoproterozoic accretionary and collisional processes and the build-up of the Borborema Province (NE Brazil): Geochronological and geochemical evidence from the Central Domain
author NEVES, Sérgio P.
author_facet NEVES, Sérgio P.
LAGES, Geysson A.
BRASILINO, Roberta G.
MIRANDA, Alan W.A.
author_role author
author2 LAGES, Geysson A.
BRASILINO, Roberta G.
MIRANDA, Alan W.A.
author2_role author
author
author
dc.contributor.author.fl_str_mv NEVES, Sérgio P.
LAGES, Geysson A.
BRASILINO, Roberta G.
MIRANDA, Alan W.A.
dc.subject.por.fl_str_mv GEOQUÍMICA
ISÓTOPOS DE ND
GEOCRONOLOGIA U-PB
EVOLUÇÃO CRUSTAL
PALEOPROTEROZÓICO
PROVÍNCIA BORBOREMA
NORDESTE
BRASIL
topic GEOQUÍMICA
ISÓTOPOS DE ND
GEOCRONOLOGIA U-PB
EVOLUÇÃO CRUSTAL
PALEOPROTEROZÓICO
PROVÍNCIA BORBOREMA
NORDESTE
BRASIL
description Several Brasiliano-Pan-African belts consist of large areas of reworked Paleoproterozoic rocks. Characterization of these rocks is needed to place better controls on Precambrian paleogeographic reconstructions. The Borborema Province, northeastern Brazil, occupies a central position in West Gondwana configuration, and knowledge of its geological evolution is crucial to infer relationships between Paleoproterozoic units in South America and Africa. Here, we report UePb ages, major- and trace-elements analyses and SmeNd isotopic data for orthogneisses in the eastern portion of Central Domain. The dominant basement units in the study area are banded gneisses of intermediate composition and relatively juvenile character, and migmatitic gneisses of granitic composition with Archean Nd TDM model ages. One sample of the banded gneiss yielded a weighted 207Pb/206Pb age of 2096 ± 23 Ma and an upper intercept age of 2044 ± 27 Ma, which we interpret, respectively, as ages of crystallization and metamorphism. Two large units of migmatitic gneiss in the southern and central parts of the area gave ages of, respectively, 2057 ± 20 Ma and 2055 ± 23 Ma; an orthoamphibolite associated with the latter yielded crystallization age of 2042 ± 11 Ma and metamorphic age of 1996 ± 13 Ma. All these rocks have geochemical signatures typical of subduction zone-related magmas. Combined with evidence provided by previous studies, we suggest that the evolution of the study area starts with island arc construction around 2.2 Ga, leading to an expressive volcanic arc edifice by 2.13 e2.10 Ga. By 2.06 Ga, the crust had evolved enough to become intruded by magmas formed at the mantle wedge of the now largely continental magmatic arc, which continued to be intruded by mantle melts until at least 2.04 Ga. An augen gneiss in the northern part of the area, with an age of 2109 ± 15 Ma, and a migmatitic gneiss with a much older age (2183 ± 9 Ma), both of which have geochemical characteristics akin to intraplate magmas, suggest that crustal reworking also took place. The 1981 ± 23 Ma age of a small body of peraluminous felsic gneiss may be related to regional metamorphism and syncollisional magmatism at c. 2.0e1.98 Ga.
publishDate 2015
dc.date.issued.fl_str_mv 2015
dc.date.accessioned.fl_str_mv 2016-08-26T12:58:17Z
dc.date.available.fl_str_mv 2016-08-26T12:58:17Z
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dc.identifier.citation.fl_str_mv NEVES, Sérgio P. et al. Paleoproterozoic accretionary and collisional processes and the build-up of the Borborema Province (NE Brazil): Geochronological and geochemical evidence from the Central Domain. Journal of South American Earth Sciences, Oxford, v. 58, p. 165-187, Mar. 2015.
dc.identifier.uri.fl_str_mv https://rigeo.cprm.gov.br/handle/doc/16659
dc.identifier.issn.none.fl_str_mv 0895-9811
identifier_str_mv NEVES, Sérgio P. et al. Paleoproterozoic accretionary and collisional processes and the build-up of the Borborema Province (NE Brazil): Geochronological and geochemical evidence from the Central Domain. Journal of South American Earth Sciences, Oxford, v. 58, p. 165-187, Mar. 2015.
0895-9811
url https://rigeo.cprm.gov.br/handle/doc/16659
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dc.publisher.none.fl_str_mv Elsevier
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