Long-term vegetation-induced goethite and hematite dissolution-reprecipitation along the Brazilian Atlantic margin

Detalhes bibliográficos
Autor(a) principal: Monteiro, H. S. [UNESP]
Data de Publicação: 2022
Outros Autores: Vasconcelos, P. M., Farley, K. A., Mello, C. L., Conceição, F. T. [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1016/j.palaeo.2022.111137
http://hdl.handle.net/11449/240428
Resumo: Distinctive sediments containing mostly quartz, kaolinite, and both detrital and authigenic hematite and goethite blanket ~5000 km of the Atlantic coast of Brazil from Rio de Janeiro all the way to the mouth of the Amazon River. The sediments represent a significant period of continental erosion followed by renewed weathering. Here we present (U–Th)/He ages of detrital and authigenic goethites and hematites collected from six weathering profiles in Espírito Santo, southeastern Brazil. Detrital goethites are as old as ~26 Ma and the oldest authigenic hematite is ~20 Ma, suggesting that erosion, transportation, and deposition of the sediments occurred in the 26–20 Ma period. Intense post-depositional weathering and ferruginization of the sediments suggest that precipitation-dissolution-reprecipitation of iron oxides and oxyhydroxides were strongly controlled by biologically driven weathering reactions. (U–Th)/He geochronology of 158 grains of authigenic goethite and hematite precipitated during biologically mediated water-rock interaction yield 137 results in the 5–0.6 Ma period, suggesting that tropical climate and abundant vegetation dominated the coast of Espírito Santo since the Pliocene.
id UNSP_59049cf12e0eba695b92bb140e43ff29
oai_identifier_str oai:repositorio.unesp.br:11449/240428
network_acronym_str UNSP
network_name_str Repositório Institucional da UNESP
repository_id_str 2946
spelling Long-term vegetation-induced goethite and hematite dissolution-reprecipitation along the Brazilian Atlantic marginDistinctive sediments containing mostly quartz, kaolinite, and both detrital and authigenic hematite and goethite blanket ~5000 km of the Atlantic coast of Brazil from Rio de Janeiro all the way to the mouth of the Amazon River. The sediments represent a significant period of continental erosion followed by renewed weathering. Here we present (U–Th)/He ages of detrital and authigenic goethites and hematites collected from six weathering profiles in Espírito Santo, southeastern Brazil. Detrital goethites are as old as ~26 Ma and the oldest authigenic hematite is ~20 Ma, suggesting that erosion, transportation, and deposition of the sediments occurred in the 26–20 Ma period. Intense post-depositional weathering and ferruginization of the sediments suggest that precipitation-dissolution-reprecipitation of iron oxides and oxyhydroxides were strongly controlled by biologically driven weathering reactions. (U–Th)/He geochronology of 158 grains of authigenic goethite and hematite precipitated during biologically mediated water-rock interaction yield 137 results in the 5–0.6 Ma period, suggesting that tropical climate and abundant vegetation dominated the coast of Espírito Santo since the Pliocene.National Science FoundationFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Australian Research CouncilDepartment of Geography and Environmental Planning São Paulo State University, SPSchool of Earth and Environmental Sciences The University of QueenslandDivision of Geological and Planetary Sciences California Institute of TechnologyDepartment of Geology Federal University of Rio de Janeiro, RJDepartment of Geography and Environmental Planning São Paulo State University, SPFAPESP: 2017/23577-2FAPESP: 2018/00102-1Australian Research Council: DP160104988Universidade Estadual Paulista (UNESP)The University of QueenslandCalifornia Institute of TechnologyFederal University of Rio de JaneiroMonteiro, H. S. [UNESP]Vasconcelos, P. M.Farley, K. A.Mello, C. L.Conceição, F. T. [UNESP]2023-03-01T20:16:41Z2023-03-01T20:16:41Z2022-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.palaeo.2022.111137Palaeogeography, Palaeoclimatology, Palaeoecology, v. 601.0031-0182http://hdl.handle.net/11449/24042810.1016/j.palaeo.2022.1111372-s2.0-85133784475Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPalaeogeography, Palaeoclimatology, Palaeoecologyinfo:eu-repo/semantics/openAccess2023-03-01T20:16:41Zoai:repositorio.unesp.br:11449/240428Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-03-01T20:16:41Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Long-term vegetation-induced goethite and hematite dissolution-reprecipitation along the Brazilian Atlantic margin
title Long-term vegetation-induced goethite and hematite dissolution-reprecipitation along the Brazilian Atlantic margin
spellingShingle Long-term vegetation-induced goethite and hematite dissolution-reprecipitation along the Brazilian Atlantic margin
Monteiro, H. S. [UNESP]
title_short Long-term vegetation-induced goethite and hematite dissolution-reprecipitation along the Brazilian Atlantic margin
title_full Long-term vegetation-induced goethite and hematite dissolution-reprecipitation along the Brazilian Atlantic margin
title_fullStr Long-term vegetation-induced goethite and hematite dissolution-reprecipitation along the Brazilian Atlantic margin
title_full_unstemmed Long-term vegetation-induced goethite and hematite dissolution-reprecipitation along the Brazilian Atlantic margin
title_sort Long-term vegetation-induced goethite and hematite dissolution-reprecipitation along the Brazilian Atlantic margin
author Monteiro, H. S. [UNESP]
author_facet Monteiro, H. S. [UNESP]
Vasconcelos, P. M.
Farley, K. A.
Mello, C. L.
Conceição, F. T. [UNESP]
author_role author
author2 Vasconcelos, P. M.
Farley, K. A.
Mello, C. L.
Conceição, F. T. [UNESP]
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (UNESP)
The University of Queensland
California Institute of Technology
Federal University of Rio de Janeiro
dc.contributor.author.fl_str_mv Monteiro, H. S. [UNESP]
Vasconcelos, P. M.
Farley, K. A.
Mello, C. L.
Conceição, F. T. [UNESP]
description Distinctive sediments containing mostly quartz, kaolinite, and both detrital and authigenic hematite and goethite blanket ~5000 km of the Atlantic coast of Brazil from Rio de Janeiro all the way to the mouth of the Amazon River. The sediments represent a significant period of continental erosion followed by renewed weathering. Here we present (U–Th)/He ages of detrital and authigenic goethites and hematites collected from six weathering profiles in Espírito Santo, southeastern Brazil. Detrital goethites are as old as ~26 Ma and the oldest authigenic hematite is ~20 Ma, suggesting that erosion, transportation, and deposition of the sediments occurred in the 26–20 Ma period. Intense post-depositional weathering and ferruginization of the sediments suggest that precipitation-dissolution-reprecipitation of iron oxides and oxyhydroxides were strongly controlled by biologically driven weathering reactions. (U–Th)/He geochronology of 158 grains of authigenic goethite and hematite precipitated during biologically mediated water-rock interaction yield 137 results in the 5–0.6 Ma period, suggesting that tropical climate and abundant vegetation dominated the coast of Espírito Santo since the Pliocene.
publishDate 2022
dc.date.none.fl_str_mv 2022-09-01
2023-03-01T20:16:41Z
2023-03-01T20:16:41Z
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.palaeo.2022.111137
Palaeogeography, Palaeoclimatology, Palaeoecology, v. 601.
0031-0182
http://hdl.handle.net/11449/240428
10.1016/j.palaeo.2022.111137
2-s2.0-85133784475
url http://dx.doi.org/10.1016/j.palaeo.2022.111137
http://hdl.handle.net/11449/240428
identifier_str_mv Palaeogeography, Palaeoclimatology, Palaeoecology, v. 601.
0031-0182
10.1016/j.palaeo.2022.111137
2-s2.0-85133784475
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Palaeogeography, Palaeoclimatology, Palaeoecology
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
_version_ 1799965513795764224