Thermochronology and exhumation history of the basement and sediments of the NNE border of the Paraná basin, Brazil
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.jsames.2020.102512 http://hdl.handle.net/11449/201526 |
Resumo: | Combined zircon fission-track (FT) and U–Pb dating were used to obtain correlated cooling ages and tectonic processes in the eastern border of the Phanerozoic Paraná Basin, a large cratonic sedimentary basin in South America deposited over Precambrian basement, which is represented mainly by the Neoproterozoic Brasília Orogenic Belt. Zircon ages obtained for clastic sediments suggest that the provenance history of the Paraná Basin was derived chiefly from the proximal basement sources. Twelve zircon samples were collected, from which 194 grains were analyzed and simultaneously dated by the FT and U–Pb methods, and 146 zircon grains were additionally dated only through the fission-track method (FT). The standard sample of Fish Canyon Tuff (FCT) was also analyzed through FT and U–Pb, and the age results of 26.6 ± 1.1 Ma, and 28.33 ± 0.68 Ma, respectively, are consistent with the literature data. The fission-track ages, obtained for the Araxá (~330 Ma) and Canastra (~500 Ma) Groups, and Piumhi Massif (~700 Ma) pertaining to the Brasília Belt, in average increase towards the São Francisco Craton. This fission-track age pattern can be linked to the temperature and exhumation of each one of these units. The U–Pb detrital zircon ages obtained for the basement units range from 1.6 to 3.2 Ga and indicate different provenance sources in the evolution of the Brasília Belt. However, it is clear that the main sources of metasedimentary rocks are derived from the São Francisco-Congo Craton. For samples collected in the NNE border of the Paraná Basin, FT ages were obtained for 127 zircon grains with ages ranging between 100 and 600 Ma. Forty of these grains dated simultaneously with FT and U–Pb bear mean age populations of 0.6 and 1.0 Ga, and subordinately between 1.5 and 2.5 Ga. These results suggest that the units that represent the São Francisco Craton's Neoproterozoic passive margin were being formed with depositional sediments 1.0 Ga ago and their recycling was the main source for the zircon derivation recorded in the Paraná Basin sediments. An important methodological result of this work is that U–Pb radiometric dating was done in the same areas of single zircon crystals employed to determine the FT ages, which improved the concordance in the U–Pb ages. As such, U–Pb dating on zircon micro areas that have undergone leaching, metamictization or another type of lattice damage was avoided. |
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Thermochronology and exhumation history of the basement and sediments of the NNE border of the Paraná basin, BrazilBrasília beltFission-track method.LA-MC-ICP-MSParaná basinU–Pb in situ datingZirconCombined zircon fission-track (FT) and U–Pb dating were used to obtain correlated cooling ages and tectonic processes in the eastern border of the Phanerozoic Paraná Basin, a large cratonic sedimentary basin in South America deposited over Precambrian basement, which is represented mainly by the Neoproterozoic Brasília Orogenic Belt. Zircon ages obtained for clastic sediments suggest that the provenance history of the Paraná Basin was derived chiefly from the proximal basement sources. Twelve zircon samples were collected, from which 194 grains were analyzed and simultaneously dated by the FT and U–Pb methods, and 146 zircon grains were additionally dated only through the fission-track method (FT). The standard sample of Fish Canyon Tuff (FCT) was also analyzed through FT and U–Pb, and the age results of 26.6 ± 1.1 Ma, and 28.33 ± 0.68 Ma, respectively, are consistent with the literature data. The fission-track ages, obtained for the Araxá (~330 Ma) and Canastra (~500 Ma) Groups, and Piumhi Massif (~700 Ma) pertaining to the Brasília Belt, in average increase towards the São Francisco Craton. This fission-track age pattern can be linked to the temperature and exhumation of each one of these units. The U–Pb detrital zircon ages obtained for the basement units range from 1.6 to 3.2 Ga and indicate different provenance sources in the evolution of the Brasília Belt. However, it is clear that the main sources of metasedimentary rocks are derived from the São Francisco-Congo Craton. For samples collected in the NNE border of the Paraná Basin, FT ages were obtained for 127 zircon grains with ages ranging between 100 and 600 Ma. Forty of these grains dated simultaneously with FT and U–Pb bear mean age populations of 0.6 and 1.0 Ga, and subordinately between 1.5 and 2.5 Ga. These results suggest that the units that represent the São Francisco Craton's Neoproterozoic passive margin were being formed with depositional sediments 1.0 Ga ago and their recycling was the main source for the zircon derivation recorded in the Paraná Basin sediments. An important methodological result of this work is that U–Pb radiometric dating was done in the same areas of single zircon crystals employed to determine the FT ages, which improved the concordance in the U–Pb ages. As such, U–Pb dating on zircon micro areas that have undergone leaching, metamictization or another type of lattice damage was avoided.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Department of Physics Univ Estadual Paulista UNESP, CEP 19060-900 Presidente PrudenteLaboratory of Geochronological Studies Geodynamics and Environment Institute of Geosciences Universidade de BrasíliaInstitute of Geosciences and Exact Sciences Univ Estadual Paulista UNESP, CEP 13506-900 Rio ClaroThermochronology and Archaeometry Research Group Institute of Earth Sciences University of Heidelberg, Postfach 103980Department of Physics Univ Estadual Paulista UNESP, CEP 19060-900 Presidente PrudenteInstitute of Geosciences and Exact Sciences Univ Estadual Paulista UNESP, CEP 13506-900 Rio ClaroFAPESP: 2011/14943-9FAPESP: 2014/15838-2Universidade Estadual Paulista (Unesp)Universidade de Brasília (UnB)University of HeidelbergResende, Rosana Silveira [UNESP]Tello Sáenz, Carlos Alberto [UNESP]Dantas, Elton LuizHackspacher, Peter Christian [UNESP]Chavez Machaca, César AnthonyGlasmacher, Ulrich A.2020-12-12T02:34:52Z2020-12-12T02:34:52Z2020-04-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.jsames.2020.102512Journal of South American Earth Sciences, v. 99.0895-9811http://hdl.handle.net/11449/20152610.1016/j.jsames.2020.1025122-s2.0-85079017096Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of South American Earth Sciencesinfo:eu-repo/semantics/openAccess2021-10-22T20:11:27Zoai:repositorio.unesp.br:11449/201526Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:43:06.985971Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Thermochronology and exhumation history of the basement and sediments of the NNE border of the Paraná basin, Brazil |
title |
Thermochronology and exhumation history of the basement and sediments of the NNE border of the Paraná basin, Brazil |
spellingShingle |
Thermochronology and exhumation history of the basement and sediments of the NNE border of the Paraná basin, Brazil Resende, Rosana Silveira [UNESP] Brasília belt Fission-track method. LA-MC-ICP-MS Paraná basin U–Pb in situ dating Zircon |
title_short |
Thermochronology and exhumation history of the basement and sediments of the NNE border of the Paraná basin, Brazil |
title_full |
Thermochronology and exhumation history of the basement and sediments of the NNE border of the Paraná basin, Brazil |
title_fullStr |
Thermochronology and exhumation history of the basement and sediments of the NNE border of the Paraná basin, Brazil |
title_full_unstemmed |
Thermochronology and exhumation history of the basement and sediments of the NNE border of the Paraná basin, Brazil |
title_sort |
Thermochronology and exhumation history of the basement and sediments of the NNE border of the Paraná basin, Brazil |
author |
Resende, Rosana Silveira [UNESP] |
author_facet |
Resende, Rosana Silveira [UNESP] Tello Sáenz, Carlos Alberto [UNESP] Dantas, Elton Luiz Hackspacher, Peter Christian [UNESP] Chavez Machaca, César Anthony Glasmacher, Ulrich A. |
author_role |
author |
author2 |
Tello Sáenz, Carlos Alberto [UNESP] Dantas, Elton Luiz Hackspacher, Peter Christian [UNESP] Chavez Machaca, César Anthony Glasmacher, Ulrich A. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade de Brasília (UnB) University of Heidelberg |
dc.contributor.author.fl_str_mv |
Resende, Rosana Silveira [UNESP] Tello Sáenz, Carlos Alberto [UNESP] Dantas, Elton Luiz Hackspacher, Peter Christian [UNESP] Chavez Machaca, César Anthony Glasmacher, Ulrich A. |
dc.subject.por.fl_str_mv |
Brasília belt Fission-track method. LA-MC-ICP-MS Paraná basin U–Pb in situ dating Zircon |
topic |
Brasília belt Fission-track method. LA-MC-ICP-MS Paraná basin U–Pb in situ dating Zircon |
description |
Combined zircon fission-track (FT) and U–Pb dating were used to obtain correlated cooling ages and tectonic processes in the eastern border of the Phanerozoic Paraná Basin, a large cratonic sedimentary basin in South America deposited over Precambrian basement, which is represented mainly by the Neoproterozoic Brasília Orogenic Belt. Zircon ages obtained for clastic sediments suggest that the provenance history of the Paraná Basin was derived chiefly from the proximal basement sources. Twelve zircon samples were collected, from which 194 grains were analyzed and simultaneously dated by the FT and U–Pb methods, and 146 zircon grains were additionally dated only through the fission-track method (FT). The standard sample of Fish Canyon Tuff (FCT) was also analyzed through FT and U–Pb, and the age results of 26.6 ± 1.1 Ma, and 28.33 ± 0.68 Ma, respectively, are consistent with the literature data. The fission-track ages, obtained for the Araxá (~330 Ma) and Canastra (~500 Ma) Groups, and Piumhi Massif (~700 Ma) pertaining to the Brasília Belt, in average increase towards the São Francisco Craton. This fission-track age pattern can be linked to the temperature and exhumation of each one of these units. The U–Pb detrital zircon ages obtained for the basement units range from 1.6 to 3.2 Ga and indicate different provenance sources in the evolution of the Brasília Belt. However, it is clear that the main sources of metasedimentary rocks are derived from the São Francisco-Congo Craton. For samples collected in the NNE border of the Paraná Basin, FT ages were obtained for 127 zircon grains with ages ranging between 100 and 600 Ma. Forty of these grains dated simultaneously with FT and U–Pb bear mean age populations of 0.6 and 1.0 Ga, and subordinately between 1.5 and 2.5 Ga. These results suggest that the units that represent the São Francisco Craton's Neoproterozoic passive margin were being formed with depositional sediments 1.0 Ga ago and their recycling was the main source for the zircon derivation recorded in the Paraná Basin sediments. An important methodological result of this work is that U–Pb radiometric dating was done in the same areas of single zircon crystals employed to determine the FT ages, which improved the concordance in the U–Pb ages. As such, U–Pb dating on zircon micro areas that have undergone leaching, metamictization or another type of lattice damage was avoided. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-12T02:34:52Z 2020-12-12T02:34:52Z 2020-04-01 |
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 |
http://dx.doi.org/10.1016/j.jsames.2020.102512 Journal of South American Earth Sciences, v. 99. 0895-9811 http://hdl.handle.net/11449/201526 10.1016/j.jsames.2020.102512 2-s2.0-85079017096 |
url |
http://dx.doi.org/10.1016/j.jsames.2020.102512 http://hdl.handle.net/11449/201526 |
identifier_str_mv |
Journal of South American Earth Sciences, v. 99. 0895-9811 10.1016/j.jsames.2020.102512 2-s2.0-85079017096 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of South American Earth Sciences |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1808129350032162816 |