Aeromagnetometry and aerogammaspectrometry integrated with U-Pb zircon geochronology of northern Bossoroca ophiolite, Brasiliano Orogen

Detalhes bibliográficos
Autor(a) principal: Hartmann, Léo Afraneo
Data de Publicação: 2021
Outros Autores: Massuda, Amanda Juliano, Cerva-Alves, Tiara, Lana, Cristiano de Carvalho, Leandro, Carolina Gonçalves, Savian, Jairo Francisco
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/220250
Resumo: Age delimitation integrated with aeromagnetometric and aerogammaspectrometric survey advances the understanding of ophiolite evolution in the Brasiliano Orogen. We focused on the Bossoroca ophiolite, because oceanic crustal and mantle rocks contain zircon in metasomatic chloritite. A metadiorite and a metavolcanoclastic rock were also studied to delimit relationship between ophiolite and island-arc infrastructure and superstructure. Zircon crystals were dated by laser ablation inductively coupled plasma emission spectroscopy. Ages of zircon from Campestre metavolcanoclastic rock are 920-840 (peak 842) Ma, Bossoroca chloritite 900-800 (peak 868 Ma) and Capivaras metadiorite 698 Ma. Ages 920-800 Ma correspond to processes in the oceanic crust, whereas 698 Ma was a late magmatic intrusion (Capivaras metadiorite) into the island-arc infrastructure. Aeromagnetometric and aerogammaspectrometric data delimit the occurrence and structure of the ophiolite. These are major multiproxy markers of geotectonic processes early in the Brasiliano Orogen.
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spelling Hartmann, Léo AfraneoMassuda, Amanda JulianoCerva-Alves, TiaraLana, Cristiano de CarvalhoLeandro, Carolina GonçalvesSavian, Jairo Francisco2021-04-27T04:33:58Z20210001-3765http://hdl.handle.net/10183/220250001123661Age delimitation integrated with aeromagnetometric and aerogammaspectrometric survey advances the understanding of ophiolite evolution in the Brasiliano Orogen. We focused on the Bossoroca ophiolite, because oceanic crustal and mantle rocks contain zircon in metasomatic chloritite. A metadiorite and a metavolcanoclastic rock were also studied to delimit relationship between ophiolite and island-arc infrastructure and superstructure. Zircon crystals were dated by laser ablation inductively coupled plasma emission spectroscopy. Ages of zircon from Campestre metavolcanoclastic rock are 920-840 (peak 842) Ma, Bossoroca chloritite 900-800 (peak 868 Ma) and Capivaras metadiorite 698 Ma. Ages 920-800 Ma correspond to processes in the oceanic crust, whereas 698 Ma was a late magmatic intrusion (Capivaras metadiorite) into the island-arc infrastructure. Aeromagnetometric and aerogammaspectrometric data delimit the occurrence and structure of the ophiolite. These are major multiproxy markers of geotectonic processes early in the Brasiliano Orogen.application/pdfengAnais da Academia Brasileira de Ciências. Vol. 93, n. 1 (Feb. 2021), e20190791AerogeofísicaGeocronologiaOfiolito BossorocaBrasiliano OrogenGeocronologia de zircão U-PbAeromagnetometry and aerogammaspectrometry integrated with U-Pb zircon geochronology of northern Bossoroca ophiolite, Brasiliano OrogenEstrangeiroinfo: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:UFRGSTEXT001123661.pdf.txt001123661.pdf.txtExtracted Texttext/plain44022http://www.lume.ufrgs.br/bitstream/10183/220250/2/001123661.pdf.txtc842b05cee6017ce6c1035c658672adbMD52ORIGINAL001123661.pdfTexto completo (inglês)application/pdf11248171http://www.lume.ufrgs.br/bitstream/10183/220250/1/001123661.pdfa4312937b254bb715d6ef9d2451d0d62MD5110183/2202502021-11-20 05:55:56.472642oai:www.lume.ufrgs.br:10183/220250Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2021-11-20T07:55:56Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Aeromagnetometry and aerogammaspectrometry integrated with U-Pb zircon geochronology of northern Bossoroca ophiolite, Brasiliano Orogen
title Aeromagnetometry and aerogammaspectrometry integrated with U-Pb zircon geochronology of northern Bossoroca ophiolite, Brasiliano Orogen
spellingShingle Aeromagnetometry and aerogammaspectrometry integrated with U-Pb zircon geochronology of northern Bossoroca ophiolite, Brasiliano Orogen
Hartmann, Léo Afraneo
Aerogeofísica
Geocronologia
Ofiolito Bossoroca
Brasiliano Orogen
Geocronologia de zircão U-Pb
title_short Aeromagnetometry and aerogammaspectrometry integrated with U-Pb zircon geochronology of northern Bossoroca ophiolite, Brasiliano Orogen
title_full Aeromagnetometry and aerogammaspectrometry integrated with U-Pb zircon geochronology of northern Bossoroca ophiolite, Brasiliano Orogen
title_fullStr Aeromagnetometry and aerogammaspectrometry integrated with U-Pb zircon geochronology of northern Bossoroca ophiolite, Brasiliano Orogen
title_full_unstemmed Aeromagnetometry and aerogammaspectrometry integrated with U-Pb zircon geochronology of northern Bossoroca ophiolite, Brasiliano Orogen
title_sort Aeromagnetometry and aerogammaspectrometry integrated with U-Pb zircon geochronology of northern Bossoroca ophiolite, Brasiliano Orogen
author Hartmann, Léo Afraneo
author_facet Hartmann, Léo Afraneo
Massuda, Amanda Juliano
Cerva-Alves, Tiara
Lana, Cristiano de Carvalho
Leandro, Carolina Gonçalves
Savian, Jairo Francisco
author_role author
author2 Massuda, Amanda Juliano
Cerva-Alves, Tiara
Lana, Cristiano de Carvalho
Leandro, Carolina Gonçalves
Savian, Jairo Francisco
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Hartmann, Léo Afraneo
Massuda, Amanda Juliano
Cerva-Alves, Tiara
Lana, Cristiano de Carvalho
Leandro, Carolina Gonçalves
Savian, Jairo Francisco
dc.subject.por.fl_str_mv Aerogeofísica
Geocronologia
topic Aerogeofísica
Geocronologia
Ofiolito Bossoroca
Brasiliano Orogen
Geocronologia de zircão U-Pb
dc.subject.eng.fl_str_mv Ofiolito Bossoroca
Brasiliano Orogen
Geocronologia de zircão U-Pb
description Age delimitation integrated with aeromagnetometric and aerogammaspectrometric survey advances the understanding of ophiolite evolution in the Brasiliano Orogen. We focused on the Bossoroca ophiolite, because oceanic crustal and mantle rocks contain zircon in metasomatic chloritite. A metadiorite and a metavolcanoclastic rock were also studied to delimit relationship between ophiolite and island-arc infrastructure and superstructure. Zircon crystals were dated by laser ablation inductively coupled plasma emission spectroscopy. Ages of zircon from Campestre metavolcanoclastic rock are 920-840 (peak 842) Ma, Bossoroca chloritite 900-800 (peak 868 Ma) and Capivaras metadiorite 698 Ma. Ages 920-800 Ma correspond to processes in the oceanic crust, whereas 698 Ma was a late magmatic intrusion (Capivaras metadiorite) into the island-arc infrastructure. Aeromagnetometric and aerogammaspectrometric data delimit the occurrence and structure of the ophiolite. These are major multiproxy markers of geotectonic processes early in the Brasiliano Orogen.
publishDate 2021
dc.date.accessioned.fl_str_mv 2021-04-27T04:33:58Z
dc.date.issued.fl_str_mv 2021
dc.type.driver.fl_str_mv Estrangeiro
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dc.identifier.issn.pt_BR.fl_str_mv 0001-3765
dc.identifier.nrb.pt_BR.fl_str_mv 001123661
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dc.language.iso.fl_str_mv eng
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dc.relation.ispartof.pt_BR.fl_str_mv Anais da Academia Brasileira de Ciências. Vol. 93, n. 1 (Feb. 2021), e20190791
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eu_rights_str_mv openAccess
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dc.source.none.fl_str_mv reponame:Repositório Institucional da UFRGS
instname:Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
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instacron_str UFRGS
institution UFRGS
reponame_str Repositório Institucional da UFRGS
collection Repositório Institucional da UFRGS
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