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

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorThe University of Queensland-
Autor(es): dc.contributorCalifornia Institute of Technology-
Autor(es): dc.contributorFederal University of Rio de Janeiro-
Autor(es): dc.creatorMonteiro, H. S.-
Autor(es): dc.creatorVasconcelos, P. M.-
Autor(es): dc.creatorFarley, K. A.-
Autor(es): dc.creatorMello, C. L.-
Autor(es): dc.creatorConceição, F. T.-
Data de aceite: dc.date.accessioned2025-08-21T21:52:24Z-
Data de disponibilização: dc.date.available2025-08-21T21:52:24Z-
Data de envio: dc.date.issued2023-03-01-
Data de envio: dc.date.issued2023-03-01-
Data de envio: dc.date.issued2022-09-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.palaeo.2022.111137-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/240428-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/240428-
Descrição: dc.descriptionDistinctive 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.-
Descrição: dc.descriptionNational Science Foundation-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionAustralian Research Council-
Descrição: dc.descriptionDepartment of Geography and Environmental Planning São Paulo State University, SP-
Descrição: dc.descriptionSchool of Earth and Environmental Sciences The University of Queensland-
Descrição: dc.descriptionDivision of Geological and Planetary Sciences California Institute of Technology-
Descrição: dc.descriptionDepartment of Geology Federal University of Rio de Janeiro, RJ-
Descrição: dc.descriptionDepartment of Geography and Environmental Planning São Paulo State University, SP-
Descrição: dc.descriptionFAPESP: 2017/23577-2-
Descrição: dc.descriptionFAPESP: 2018/00102-1-
Descrição: dc.descriptionAustralian Research Council: DP160104988-
Idioma: dc.languageen-
Relação: dc.relationPalaeogeography, Palaeoclimatology, Palaeoecology-
???dc.source???: dc.sourceScopus-
Título: dc.titleLong-term vegetation-induced goethite and hematite dissolution-reprecipitation along the Brazilian Atlantic margin-
Tipo de arquivo: dc.typelivro digital-
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