40Ar/39Ar geochronological evidence for multiple magmatic events during the emplacement of Tapira alkaline-carbonatite complex, Minas Gerais, Brazil

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorSchool of Earth Science-
Autor(es): dc.creatorConceição, Fabiano T. [UNESP]-
Autor(es): dc.creatorVasconcelos, Paulo M.-
Autor(es): dc.creatorGodoy, Letícia H. [UNESP]-
Autor(es): dc.creatorNavarro, Guillermo R.B. [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:23:50Z-
Data de disponibilização: dc.date.available2022-02-22T00:23:50Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2019-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.jsames.2019.102416-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/198184-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/198184-
Descrição: dc.descriptionThe Alto Parnaíba Igneous Province (APIP) is a voluminous magmatic province composed of various alkaline-carbonatite complexes emplaced in the Brasilia Mobile Belt during the Cretaceous. Relative timing of emplacement of silicate and carbonate magmas in most of these complexes remains mostly unresolved due to conflicting geochronological results. To determine the duration of magmatism and to test the possible existence of multiple magmatic events, we employ 40Ar/39Ar phlogopite single crystal dating to determine the history of magma emplacement at the Tapira alkaline-carbonatite complex, Minas Gerais, Brazil. The new single crystal data indicate at least two magmatic events during the emplacement of this complex, the first at > 96.2 ± 0.8 Ma and the second at 79.15 ± 0.6 Ma. The first igneous event was responsible for emplacement of the silicate plutonic series, while the second event corresponds to the emplacement of primarily carbonatitic magmas, generating metasomatic phlogopite alteration in bebedourites. The ages of intrusion and cooling of the alkaline-carbonatite complexes in the APIP must be investigated in other complexes to determine if intrusion intervals of ~17 Ma or more are common regionally. Protracted intrusive events, if related to magma generation by passage of South America over a stationary Trindade plume, requires complex ponding and lateral magma flow below a slow-moving continent.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionUniversity of Queensland-
Descrição: dc.descriptionUNESP - Universidade Estadual Paulista Instituto de Geociências e Ciências Exatas-
Descrição: dc.descriptionUniversity of Queensland School of Earth Science-
Descrição: dc.descriptionUNESP - Universidade Estadual Paulista Instituto de Geociências e Ciências Exatas-
Descrição: dc.descriptionFAPESP: 2005/59203-1-
Descrição: dc.descriptionCNPq: 200775/2008-1-
Idioma: dc.languageen-
Relação: dc.relationJournal of South American Earth Sciences-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subject40Ar/39Ar geochronology-
Palavras-chave: dc.subjectalkaline-carbonatite rocks-
Palavras-chave: dc.subjectAPIP emplacement-
Palavras-chave: dc.subjectBrazil-
Título: dc.title40Ar/39Ar geochronological evidence for multiple magmatic events during the emplacement of Tapira alkaline-carbonatite complex, Minas Gerais, Brazil-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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