Cryogenian glaciostatic and eustatic fluctuations and massive Marinoan-related deposition of Fe and Mn in the Urucum District, Brazil
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1130/G49134.1 http://hdl.handle.net/11449/222880 |
Resumo: | Global Neoproterozoic glaciations are related to extreme environmental changes and the reprise of iron formation in the rock record. However, the lack of narrow age constraints on Cryogenian successions bearing iron-formation deposits prevents correlation and understanding of these deposits on a global scale. Our new multiproxy data reveal a long Cryogenian record for the Jacadigo Group (Urucum District, Brazil) spanning the Sturtian and Marinoan ice ages. Deposition of the basal sequence of the Urucum Formation was influenced by Sturtian continental glaciation and was followed by a transgressive interglacial record of >600 m of carbonates that terminates in a glacioeustatic unconformity. Overlying this, there are up to 500 m of shale and sandstone interpreted as coeval to global Marinoan glacial advance. Glacial outwash delta deposits at the top of the formation correlate with diamictite-filled pa-leovalleys and are covered by massive Fe and Mn deposits of the Santa Cruz Formation and local carbonate. This second transgression is related to Marinoan deglaciation. Detrital zircon provenance supports glaciostatic control on Cryogenian sedimentary yield at the margins of the Amazon craton. These findings reveal the sedimentary response to two marked events of glacioeustatic incision and transgression, culminating in massive banded iron deposition during the Marinoan cryochron. |
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Cryogenian glaciostatic and eustatic fluctuations and massive Marinoan-related deposition of Fe and Mn in the Urucum District, BrazilGlobal Neoproterozoic glaciations are related to extreme environmental changes and the reprise of iron formation in the rock record. However, the lack of narrow age constraints on Cryogenian successions bearing iron-formation deposits prevents correlation and understanding of these deposits on a global scale. Our new multiproxy data reveal a long Cryogenian record for the Jacadigo Group (Urucum District, Brazil) spanning the Sturtian and Marinoan ice ages. Deposition of the basal sequence of the Urucum Formation was influenced by Sturtian continental glaciation and was followed by a transgressive interglacial record of >600 m of carbonates that terminates in a glacioeustatic unconformity. Overlying this, there are up to 500 m of shale and sandstone interpreted as coeval to global Marinoan glacial advance. Glacial outwash delta deposits at the top of the formation correlate with diamictite-filled pa-leovalleys and are covered by massive Fe and Mn deposits of the Santa Cruz Formation and local carbonate. This second transgression is related to Marinoan deglaciation. Detrital zircon provenance supports glaciostatic control on Cryogenian sedimentary yield at the margins of the Amazon craton. These findings reveal the sedimentary response to two marked events of glacioeustatic incision and transgression, culminating in massive banded iron deposition during the Marinoan cryochron.Faculdade de Tecnologia Universidade de CampinasDepartamento de Geología Universidade Federal de Ouro PretoInstituto de GeociênciasInstituto de Astronomía Geofísica e Ciências Atmosféricas Universidade de São PauloDepartamento de Geologia Universidade Estadual PaulistaDepartamento de Geologia Universidade Estadual PaulistaUniversidade Estadual de Campinas (UNICAMP)Universidade Federal de Ouro PretoInstituto de GeociênciasUniversidade de São Paulo (USP)Universidade Estadual Paulista (UNESP)Freitas, B. T.Rudnitzki, I. D.Morais, L.Campos, M. D.R.Almeida, R. P.Warren, L. V. [UNESP]Boggiani, P. C.Caetano-Filho, S.Bedoya-Rueda, C.Babinski, M.Fairchild, T. R.Trindade, R. I.F.2022-04-28T19:47:15Z2022-04-28T19:47:15Z2021-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1478-1483http://dx.doi.org/10.1130/G49134.1Geology, v. 49, n. 12, p. 1478-1483, 2021.1943-26820091-7613http://hdl.handle.net/11449/22288010.1130/G49134.12-s2.0-85119277222Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengGeologyinfo:eu-repo/semantics/openAccess2022-04-28T19:47:15Zoai:repositorio.unesp.br:11449/222880Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:19:14.480007Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Cryogenian glaciostatic and eustatic fluctuations and massive Marinoan-related deposition of Fe and Mn in the Urucum District, Brazil |
title |
Cryogenian glaciostatic and eustatic fluctuations and massive Marinoan-related deposition of Fe and Mn in the Urucum District, Brazil |
spellingShingle |
Cryogenian glaciostatic and eustatic fluctuations and massive Marinoan-related deposition of Fe and Mn in the Urucum District, Brazil Freitas, B. T. |
title_short |
Cryogenian glaciostatic and eustatic fluctuations and massive Marinoan-related deposition of Fe and Mn in the Urucum District, Brazil |
title_full |
Cryogenian glaciostatic and eustatic fluctuations and massive Marinoan-related deposition of Fe and Mn in the Urucum District, Brazil |
title_fullStr |
Cryogenian glaciostatic and eustatic fluctuations and massive Marinoan-related deposition of Fe and Mn in the Urucum District, Brazil |
title_full_unstemmed |
Cryogenian glaciostatic and eustatic fluctuations and massive Marinoan-related deposition of Fe and Mn in the Urucum District, Brazil |
title_sort |
Cryogenian glaciostatic and eustatic fluctuations and massive Marinoan-related deposition of Fe and Mn in the Urucum District, Brazil |
author |
Freitas, B. T. |
author_facet |
Freitas, B. T. Rudnitzki, I. D. Morais, L. Campos, M. D.R. Almeida, R. P. Warren, L. V. [UNESP] Boggiani, P. C. Caetano-Filho, S. Bedoya-Rueda, C. Babinski, M. Fairchild, T. R. Trindade, R. I.F. |
author_role |
author |
author2 |
Rudnitzki, I. D. Morais, L. Campos, M. D.R. Almeida, R. P. Warren, L. V. [UNESP] Boggiani, P. C. Caetano-Filho, S. Bedoya-Rueda, C. Babinski, M. Fairchild, T. R. Trindade, R. I.F. |
author2_role |
author author author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual de Campinas (UNICAMP) Universidade Federal de Ouro Preto Instituto de Geociências Universidade de São Paulo (USP) Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Freitas, B. T. Rudnitzki, I. D. Morais, L. Campos, M. D.R. Almeida, R. P. Warren, L. V. [UNESP] Boggiani, P. C. Caetano-Filho, S. Bedoya-Rueda, C. Babinski, M. Fairchild, T. R. Trindade, R. I.F. |
description |
Global Neoproterozoic glaciations are related to extreme environmental changes and the reprise of iron formation in the rock record. However, the lack of narrow age constraints on Cryogenian successions bearing iron-formation deposits prevents correlation and understanding of these deposits on a global scale. Our new multiproxy data reveal a long Cryogenian record for the Jacadigo Group (Urucum District, Brazil) spanning the Sturtian and Marinoan ice ages. Deposition of the basal sequence of the Urucum Formation was influenced by Sturtian continental glaciation and was followed by a transgressive interglacial record of >600 m of carbonates that terminates in a glacioeustatic unconformity. Overlying this, there are up to 500 m of shale and sandstone interpreted as coeval to global Marinoan glacial advance. Glacial outwash delta deposits at the top of the formation correlate with diamictite-filled pa-leovalleys and are covered by massive Fe and Mn deposits of the Santa Cruz Formation and local carbonate. This second transgression is related to Marinoan deglaciation. Detrital zircon provenance supports glaciostatic control on Cryogenian sedimentary yield at the margins of the Amazon craton. These findings reveal the sedimentary response to two marked events of glacioeustatic incision and transgression, culminating in massive banded iron deposition during the Marinoan cryochron. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-12-01 2022-04-28T19:47:15Z 2022-04-28T19:47:15Z |
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/10.1130/G49134.1 Geology, v. 49, n. 12, p. 1478-1483, 2021. 1943-2682 0091-7613 http://hdl.handle.net/11449/222880 10.1130/G49134.1 2-s2.0-85119277222 |
url |
http://dx.doi.org/10.1130/G49134.1 http://hdl.handle.net/11449/222880 |
identifier_str_mv |
Geology, v. 49, n. 12, p. 1478-1483, 2021. 1943-2682 0091-7613 10.1130/G49134.1 2-s2.0-85119277222 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Geology |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1478-1483 |
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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1808128790455386112 |