Re–Os age constraints and new observations of Proterozoic glacial deposits in the Vazante Group, Brazil
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFBA |
Texto Completo: | http://repositorio.ufba.br/ri/handle/ri/15873 |
Resumo: | Texto completo: acesso restrito. p. 199–213 |
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Geboy, Nicholas J.Kaufman, Alan J.Walker, Richard J.Misi, AroldoOliviera, Tolentino Flavio deMiller, Kristen E.Azmy, KaremKendall, BrianPoulton, Simon W.Geboy, Nicholas J.Kaufman, Alan J.Walker, Richard J.Misi, AroldoOliviera, Tolentino Flavio deMiller, Kristen E.Azmy, KaremKendall, BrianPoulton, Simon W.2014-09-09T14:36:04Z20130301-9268http://repositorio.ufba.br/ri/handle/ri/15873v. 238Texto completo: acesso restrito. p. 199–213A new Re–Os radiometric age date for an organic-rich shale horizon from the Vazante Group in Brazil, coupled with geological observations, provide evidence for late Mesoproterozoic glacial episodes, conflicting with the general view of greenhouse conditions marked by a eustatic high stand at this time. Field observations of a reverse fault juxtaposing older Mesoproterozoic sedimentary rocks above younger Neoproterozoic strata provide a new stratigraphic framework and reconcile the apparent inversion of U–Pb detrital zircon ages through the succession. Combined, the geochronological, geochemical and stratigraphic evidence suggest that the Vazante Group sediments accumulated along a passive margin of the São Francisco craton and are correlative with the neighboring Paranoá Group. Biomarker, sulfur isotope and iron speciation analyses support the interpretation of a strongly stratified water column during post-glacial transgression and deposition of one of the bituminous shale horizons. The relationship of the glaciogenic Vazante Group to other late Mesoproterozoic successions, such as the non-glacial Atar Group in West Africa and Bylot Supergroup in arctic Canada, however, remains enigmatic.Submitted by Suelen Reis (suziy.ellen@gmail.com) on 2014-04-10T15:35:52Z No. of bitstreams: 1 1-s2.0-S0301926813003057-main.pdf: 2918680 bytes, checksum: cd12440aba74da3f168db1df211dafbe (MD5)Approved for entry into archive by Rodrigo Meirelles (rodrigomei@ufba.br) on 2014-09-09T14:36:04Z (GMT) No. of bitstreams: 1 1-s2.0-S0301926813003057-main.pdf: 2918680 bytes, checksum: cd12440aba74da3f168db1df211dafbe (MD5)Made available in DSpace on 2014-09-09T14:36:04Z (GMT). No. of bitstreams: 1 1-s2.0-S0301926813003057-main.pdf: 2918680 bytes, checksum: cd12440aba74da3f168db1df211dafbe (MD5) Previous issue date: 2013http://dx.doi.org/10.1016/j.precamres.2013.10.010reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAVazante GroupMesoproterozoic glaciationRe–Os geochronologyFe-speciationRe–Os age constraints and new observations of Proterozoic glacial deposits in the Vazante Group, BrazilPrecambrian Researchinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10000-01-01info:eu-repo/semantics/openAccessengORIGINAL1-s2.0-S0301926813003057-main.pdf1-s2.0-S0301926813003057-main.pdfapplication/pdf2918680https://repositorio.ufba.br/bitstream/ri/15873/1/1-s2.0-S0301926813003057-main.pdfcd12440aba74da3f168db1df211dafbeMD51LICENSElicense.txtlicense.txttext/plain1345https://repositorio.ufba.br/bitstream/ri/15873/2/license.txt0d4b811ef71182510d2015daa7c8a900MD52TEXT1-s2.0-S0301926813003057-main.pdf.txt1-s2.0-S0301926813003057-main.pdf.txtExtracted texttext/plain76049https://repositorio.ufba.br/bitstream/ri/15873/3/1-s2.0-S0301926813003057-main.pdf.txtcb649744ecfe5a4ee24a14e0698eb5e4MD53ri/158732022-07-05 14:03:13.735oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:03:13Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false |
dc.title.pt_BR.fl_str_mv |
Re–Os age constraints and new observations of Proterozoic glacial deposits in the Vazante Group, Brazil |
dc.title.alternative.pt_BR.fl_str_mv |
Precambrian Research |
title |
Re–Os age constraints and new observations of Proterozoic glacial deposits in the Vazante Group, Brazil |
spellingShingle |
Re–Os age constraints and new observations of Proterozoic glacial deposits in the Vazante Group, Brazil Geboy, Nicholas J. Vazante Group Mesoproterozoic glaciation Re–Os geochronology Fe-speciation |
title_short |
Re–Os age constraints and new observations of Proterozoic glacial deposits in the Vazante Group, Brazil |
title_full |
Re–Os age constraints and new observations of Proterozoic glacial deposits in the Vazante Group, Brazil |
title_fullStr |
Re–Os age constraints and new observations of Proterozoic glacial deposits in the Vazante Group, Brazil |
title_full_unstemmed |
Re–Os age constraints and new observations of Proterozoic glacial deposits in the Vazante Group, Brazil |
title_sort |
Re–Os age constraints and new observations of Proterozoic glacial deposits in the Vazante Group, Brazil |
author |
Geboy, Nicholas J. |
author_facet |
Geboy, Nicholas J. Kaufman, Alan J. Walker, Richard J. Misi, Aroldo Oliviera, Tolentino Flavio de Miller, Kristen E. Azmy, Karem Kendall, Brian Poulton, Simon W. |
author_role |
author |
author2 |
Kaufman, Alan J. Walker, Richard J. Misi, Aroldo Oliviera, Tolentino Flavio de Miller, Kristen E. Azmy, Karem Kendall, Brian Poulton, Simon W. |
author2_role |
author author author author author author author author |
dc.contributor.author.fl_str_mv |
Geboy, Nicholas J. Kaufman, Alan J. Walker, Richard J. Misi, Aroldo Oliviera, Tolentino Flavio de Miller, Kristen E. Azmy, Karem Kendall, Brian Poulton, Simon W. Geboy, Nicholas J. Kaufman, Alan J. Walker, Richard J. Misi, Aroldo Oliviera, Tolentino Flavio de Miller, Kristen E. Azmy, Karem Kendall, Brian Poulton, Simon W. |
dc.subject.por.fl_str_mv |
Vazante Group Mesoproterozoic glaciation Re–Os geochronology Fe-speciation |
topic |
Vazante Group Mesoproterozoic glaciation Re–Os geochronology Fe-speciation |
description |
Texto completo: acesso restrito. p. 199–213 |
publishDate |
2013 |
dc.date.issued.fl_str_mv |
2013 |
dc.date.accessioned.fl_str_mv |
2014-09-09T14:36:04Z |
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://repositorio.ufba.br/ri/handle/ri/15873 |
dc.identifier.issn.none.fl_str_mv |
0301-9268 |
dc.identifier.number.pt_BR.fl_str_mv |
v. 238 |
identifier_str_mv |
0301-9268 v. 238 |
url |
http://repositorio.ufba.br/ri/handle/ri/15873 |
dc.language.iso.fl_str_mv |
eng |
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eng |
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info:eu-repo/semantics/openAccess |
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openAccess |
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http://dx.doi.org/10.1016/j.precamres.2013.10.010 |
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reponame:Repositório Institucional da UFBA instname:Universidade Federal da Bahia (UFBA) instacron:UFBA |
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