Evidence of upwelling on the Brazilian continental shelf of Rio Grande do Norte.

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorNogueira, Mary Lucia da Silva-
Autor(es): dc.creatorEichler, Patrícia Pinheiro Beck-
Autor(es): dc.creatorBorges, Miguel Evelim Penha-
Autor(es): dc.creatorRodrigues, André Rosch-
Autor(es): dc.creatorVital, Helenice-
Data de aceite: dc.date.accessioned2025-08-21T15:03:45Z-
Data de disponibilização: dc.date.available2025-08-21T15:03:45Z-
Data de envio: dc.date.issued2024-09-13-
Data de envio: dc.date.issued2024-09-13-
Data de envio: dc.date.issued2022-
Fonte completa do material: dc.identifierhttps://www.repositorio.ufop.br/handle/123456789/18661-
Fonte completa do material: dc.identifierhttps://doi.org/10.15406/jamb.2023.12.00380-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1001745-
Descrição: dc.descriptionThis study evaluates Foraminiferal assemblages and their relation with grain size, calcium carbonate content, organic matter, and mineralogy of sediment samples collected at the sediment-water interface along a transect on the northern continental shelf of Rio Grande do Norte State, Brazil, adjacent to the city of Areia Branca. The sedimentary sequence of this shelf is represented by lithostratigraphic units of a marine regressive sequence dominated by four facies: Siliciclastic sand, Silicibioclastic Sand, carbonate mud, and Biosiliciclastic sand. The carbonate content ranged from 5.83% to 85% and the organic matter content from 1.16% to 27.05%. Mineralogical characters separated the predominant siliciclastic content (37% to 92%) from the bioclastic content (8% to 63%). We have identified 14 species out of 50 species of Foraminifera, associated to particular depths and sediment types as follows: (1)deeper-water sediments in the middle shelf contain Bolivina striatula, Bulimina marginata, Triloculina trigonula, Pyrgo ringens, Textularia gramen (2)the shallowest sediments in the inner shelf contain Ammonia tepida, Buccella peruviana, Miliolinella subrotunda, and Quinqueloculina patagonica, (3)the central parts of the transect, also in the inner shelf, provide habitats for Quinqueloculina lamarckiana, Textularia earlandi, Buliminella elegantissima, Discorbis peruvianus, and Pyrgo nasuta. The distribution of Uvigerina striata and Buccella peruviana is probably related to colder water temperatures and possibly the occurrence of an upwelling phenomenon for the deepest parts of the area rather than the sedimentological features discussed here.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsaberto-
Direitos: dc.rightsThis is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and build upon your work non-commercially. Fonte: PDF do artigo-
Palavras-chave: dc.subjectHabitats-
Palavras-chave: dc.subjectInner and middle shelf-
Palavras-chave: dc.subjectBenthic foraminifera-
Palavras-chave: dc.subjectUpwelling-
Título: dc.titleEvidence of upwelling on the Brazilian continental shelf of Rio Grande do Norte.-
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