Phanerozoic cooling history of Archean/Paleoproterozoic basement in the southern Espinhaço Range, southeastern Brazil, through apatite fission-track analysis
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/220313 |
Resumo: | Apatite fission track thermochronology of basement rocks from the southern Espinhaço Range and QuadriláteroFerrífero in southeastern Brazil unravels the tectonic history of this portion of the Brazilian Shield. The studyarea encompasses an Archean and Paleoproterozoic granitoid-gneiss basement, in the southern border of the SãoFrancisco Craton, and an Archean to Paleo-Mesoproterozoic sedimentary cover. Apatitefission track ages (AFT)vary from 187 ± 18 to 91.8 ± 7.3 Ma and horizontal confined track lengths vary from 9.62 ± 1.81μmto12.85 ± 1.35μm. Thermal history modeling shows an accelerated cooling episode starting in the UpperDevonian to Early Permian. After this event, quiescence lasted from 115 to 170 Ma. Apatite samples lack evi-dence of far-field effects from rifting and opening of the South Atlantic Ocean, and also evidence from alkalineand basaltic magmatism emplacement during Mesozoic-Cenozoic. The AFT thermochronometer remained un-disturbed during Transminas mafic dyke swarm intrusion. Finally, the last cooling event in the Espinhaço Range-Quadrilátero Ferrífero basement records ascension to surface temperatures due to epeirogeny after new con-figurations of the Nazca, South American and African plates. A climatic origin for the ascension is supported byaccentuated erosion rates, even though a weathering-prone phase is registered in weathering profiles. |
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Santos, Edgar AmaralJelinek, Andrea RitterAbreu, Pedro Angelo AlmeidaGenezini, Frederico Antonio2021-04-28T04:31:44Z20190895-9811http://hdl.handle.net/10183/220313001124021Apatite fission track thermochronology of basement rocks from the southern Espinhaço Range and QuadriláteroFerrífero in southeastern Brazil unravels the tectonic history of this portion of the Brazilian Shield. The studyarea encompasses an Archean and Paleoproterozoic granitoid-gneiss basement, in the southern border of the SãoFrancisco Craton, and an Archean to Paleo-Mesoproterozoic sedimentary cover. Apatitefission track ages (AFT)vary from 187 ± 18 to 91.8 ± 7.3 Ma and horizontal confined track lengths vary from 9.62 ± 1.81μmto12.85 ± 1.35μm. Thermal history modeling shows an accelerated cooling episode starting in the UpperDevonian to Early Permian. After this event, quiescence lasted from 115 to 170 Ma. Apatite samples lack evi-dence of far-field effects from rifting and opening of the South Atlantic Ocean, and also evidence from alkalineand basaltic magmatism emplacement during Mesozoic-Cenozoic. The AFT thermochronometer remained un-disturbed during Transminas mafic dyke swarm intrusion. Finally, the last cooling event in the Espinhaço Range-Quadrilátero Ferrífero basement records ascension to surface temperatures due to epeirogeny after new con-figurations of the Nazca, South American and African plates. A climatic origin for the ascension is supported byaccentuated erosion rates, even though a weathering-prone phase is registered in weathering profiles.application/pdfengJournal of south american earth sciences. Vol. 96, (Dez. 2019), e102352Quadrilatero ferriferoEspinhaço Range basementApatite fission-track thermochronologyDenudation historyPhanerozoic cooling history of Archean/Paleoproterozoic basement in the southern Espinhaço Range, southeastern Brazil, through apatite fission-track analysisEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001124021.pdf.txt001124021.pdf.txtExtracted Texttext/plain0http://www.lume.ufrgs.br/bitstream/10183/220313/2/001124021.pdf.txtd41d8cd98f00b204e9800998ecf8427eMD52ORIGINAL001124021.pdfTexto completo (inglês)application/pdf7038108http://www.lume.ufrgs.br/bitstream/10183/220313/1/001124021.pdf82ac5466108ba26c30466cf4ed07bf84MD5110183/2203132021-05-07 04:43:34.592502oai:www.lume.ufrgs.br:10183/220313Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2021-05-07T07:43:34Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Phanerozoic cooling history of Archean/Paleoproterozoic basement in the southern Espinhaço Range, southeastern Brazil, through apatite fission-track analysis |
title |
Phanerozoic cooling history of Archean/Paleoproterozoic basement in the southern Espinhaço Range, southeastern Brazil, through apatite fission-track analysis |
spellingShingle |
Phanerozoic cooling history of Archean/Paleoproterozoic basement in the southern Espinhaço Range, southeastern Brazil, through apatite fission-track analysis Santos, Edgar Amaral Quadrilatero ferrifero Espinhaço Range basement Apatite fission-track thermochronology Denudation history |
title_short |
Phanerozoic cooling history of Archean/Paleoproterozoic basement in the southern Espinhaço Range, southeastern Brazil, through apatite fission-track analysis |
title_full |
Phanerozoic cooling history of Archean/Paleoproterozoic basement in the southern Espinhaço Range, southeastern Brazil, through apatite fission-track analysis |
title_fullStr |
Phanerozoic cooling history of Archean/Paleoproterozoic basement in the southern Espinhaço Range, southeastern Brazil, through apatite fission-track analysis |
title_full_unstemmed |
Phanerozoic cooling history of Archean/Paleoproterozoic basement in the southern Espinhaço Range, southeastern Brazil, through apatite fission-track analysis |
title_sort |
Phanerozoic cooling history of Archean/Paleoproterozoic basement in the southern Espinhaço Range, southeastern Brazil, through apatite fission-track analysis |
author |
Santos, Edgar Amaral |
author_facet |
Santos, Edgar Amaral Jelinek, Andrea Ritter Abreu, Pedro Angelo Almeida Genezini, Frederico Antonio |
author_role |
author |
author2 |
Jelinek, Andrea Ritter Abreu, Pedro Angelo Almeida Genezini, Frederico Antonio |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Santos, Edgar Amaral Jelinek, Andrea Ritter Abreu, Pedro Angelo Almeida Genezini, Frederico Antonio |
dc.subject.por.fl_str_mv |
Quadrilatero ferrifero |
topic |
Quadrilatero ferrifero Espinhaço Range basement Apatite fission-track thermochronology Denudation history |
dc.subject.eng.fl_str_mv |
Espinhaço Range basement Apatite fission-track thermochronology Denudation history |
description |
Apatite fission track thermochronology of basement rocks from the southern Espinhaço Range and QuadriláteroFerrífero in southeastern Brazil unravels the tectonic history of this portion of the Brazilian Shield. The studyarea encompasses an Archean and Paleoproterozoic granitoid-gneiss basement, in the southern border of the SãoFrancisco Craton, and an Archean to Paleo-Mesoproterozoic sedimentary cover. Apatitefission track ages (AFT)vary from 187 ± 18 to 91.8 ± 7.3 Ma and horizontal confined track lengths vary from 9.62 ± 1.81μmto12.85 ± 1.35μm. Thermal history modeling shows an accelerated cooling episode starting in the UpperDevonian to Early Permian. After this event, quiescence lasted from 115 to 170 Ma. Apatite samples lack evi-dence of far-field effects from rifting and opening of the South Atlantic Ocean, and also evidence from alkalineand basaltic magmatism emplacement during Mesozoic-Cenozoic. The AFT thermochronometer remained un-disturbed during Transminas mafic dyke swarm intrusion. Finally, the last cooling event in the Espinhaço Range-Quadrilátero Ferrífero basement records ascension to surface temperatures due to epeirogeny after new con-figurations of the Nazca, South American and African plates. A climatic origin for the ascension is supported byaccentuated erosion rates, even though a weathering-prone phase is registered in weathering profiles. |
publishDate |
2019 |
dc.date.issued.fl_str_mv |
2019 |
dc.date.accessioned.fl_str_mv |
2021-04-28T04:31:44Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/220313 |
dc.identifier.issn.pt_BR.fl_str_mv |
0895-9811 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001124021 |
identifier_str_mv |
0895-9811 001124021 |
url |
http://hdl.handle.net/10183/220313 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Journal of south american earth sciences. Vol. 96, (Dez. 2019), e102352 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
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Repositório Institucional da UFRGS |
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