A Record of the Snowball Earth Events? The Parecis Basin May Encompass Three Major Neoproterozoic Glaciations on the Amazonian Craton

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorFaculty of Geosciences and MARUM (Center for Marine Environmental Sciences). Leobener Str. 8-
Autor(es): dc.creatorSM Lamoso, Ingrid-
Autor(es): dc.creatorBabinski, Marly-
Autor(es): dc.creatorCaetano-Filho, Sergio-
Autor(es): dc.creatorM Paula-Santos, Gustavo-
Autor(es): dc.creatorB M Hollanda, Maria Helena-
Data de aceite: dc.date.accessioned2025-08-21T19:32:52Z-
Data de disponibilização: dc.date.available2025-08-21T19:32:52Z-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-07-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.jsames.2023.104411-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/247442-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/247442-
Descrição: dc.descriptionThe Parecis Basin is an intracratonic basin located at the south-southeast portion of the Amazonian craton. Its stratigraphic units comprise siliciclastic and carbonate rocks that potentially record intense paleoenvironmental changes related to the Sturtian (∼717–660 Ma), Marinoan (∼657–635 Ma), and Gaskiers (∼580 Ma) glaciations. We present novel X-ray fluorescence geochemistry, C, O and Sr isotopic data from carbonate rock samples retrieved from the stratigraphic well 2ANP 0006 MT. The results show two negative excursions of δ13C here correlated to post-Sturtian and Marinoan glaciations, recorded in the Salto Magessi and Mirassol d'Oeste carbonate units, respectively. Both negative excursions were followed by δ13C positive incursions. At the base of the section, Salto Magessi carbonate presents unradiogenic Sr ratios (87Sr/86Sr from 0.70655 to 0.70776) typical of Cryogenian interglacial carbonate rocks found elsewhere. The negative δ13C excursion from Mirassol d'Oeste is associated with radiogenic 87Sr/86Sr ratios (up to ∼0.7186), possibly related to continental influx from the intense erosion generated by the Marinoan deglaciation. Upward, the Nobres Formation displays preserved primary sulfate minerals (gypsum and anhydrite) and isotopically heavy oxygen compositions which point to an evaporative environment and support the scenario of enhanced oxidative weathering during early to middle Ediacaran. Finally, despite the absence of cap carbonate, diamictites related to the Serra Azul Formation occur overlying the Nobres Formation and are associated with the Gaskiers event. Therefore, the 2ANP 0006 MT may record three major glacial events from the Neoproterozoic, representing a promising section for further studies concerning chemostratigraphic and paleoenvironmental reconstructions during the Neoproterozoic Era.-
Descrição: dc.descriptionUniversidade de São Paulo Instituto de Geociências. Rua Do Lago, 562, São Paulo-
Descrição: dc.descriptionDepartamento de Geologia Universidade Estadual Paulista, Avenida 24A, 1515, Rio Claro-
Descrição: dc.descriptionUniversity of Bremen Faculty of Geosciences and MARUM (Center for Marine Environmental Sciences). Leobener Str. 8, Bremen-
Descrição: dc.descriptionDepartamento de Geologia Universidade Estadual Paulista, Avenida 24A, 1515, Rio Claro-
Idioma: dc.languageen-
Relação: dc.relationJournal of South American Earth Sciences-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAmazonian craton-
Palavras-chave: dc.subjectCarbon and oxygen isotopes-
Palavras-chave: dc.subjectNeoproterozoic cap carbonate-
Palavras-chave: dc.subjectParecis basin-
Palavras-chave: dc.subjectSnowball earth-
Palavras-chave: dc.subjectStrontium isotopes-
Título: dc.titleA Record of the Snowball Earth Events? The Parecis Basin May Encompass Three Major Neoproterozoic Glaciations on the Amazonian Craton-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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