Monazite age and composition from a granite-pegmatite system : a link between pegmatites of the São João del Rei Pegmatitic Province and the newly defined high-K Restinga Metagranite, Minas Gerais, Brazil.

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Autor(es): dc.creatorSousa, Sarah Siqueira da Cruz Guimarães-
Autor(es): dc.creatorÁvila, Ciro Alexandre-
Autor(es): dc.creatorNeumann, Reiner-
Autor(es): dc.creatorFaulstich, Fabiano Richard Leite-
Autor(es): dc.creatorCipriano, Ricardo Augusto Scholz-
Data de aceite: dc.date.accessioned2025-08-21T15:06:21Z-
Data de disponibilização: dc.date.available2025-08-21T15:06:21Z-
Data de envio: dc.date.issued2024-09-11-
Data de envio: dc.date.issued2024-09-11-
Data de envio: dc.date.issued2022-
Fonte completa do material: dc.identifierhttps://www.repositorio.ufop.br/handle/123456789/18590-
Fonte completa do material: dc.identifierhttps://www.sciencedirect.com/science/article/pii/S0895981123000433-
Fonte completa do material: dc.identifierhttps://doi.org/10.1016/j.jsames.2023.104232-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1002505-
Descrição: dc.descriptionMonazite geochronology (U–Pb by LA–SF–ICP-MS) and chemical composition by electron microprobe were used to characterize the genetic link between a group of pegmatites from the São João del Rei Pegmatitic Province and a newly defined high-K metagranite of the younger Rhyacian-Orosirian Ritapolis ́ magmatic arc of the Mineiro Belt. The monazite-(Ce) of four samples from the granite and ten from pegmatites yielded the REE pattern of a granite-pegmatite system, where the ∑LREE is similar, but the content of MREE, and Dy increase with the diminution of the crystallization temperature and, consequently, presenting a higher degree of differentiation. The monazite ages of 2022 ± 17 Ma and 2008 ± 8 Ma in the pegmatites correspond to a new event of crystallization of these bodies in the São João del Rei Pegmatitic Province. These pegmatites have a remarkable amount of xenotime and monazite (and absence of cassiterite) and have been characterized as REE-enriched pegmatites. These bodies are connected to the crystallization of an Orosirian high-K metagranite, which has a monazite crystallization age of 2018 ± 31 Ma. This metagranite, proposed here to be named as “Restinga Metagranite”, represents a new and the youngest pluton of the Mineiro Belt, increasing in 90 Ma the evolution time of the Ritapolis ́ magmatic arc (2.19–2.02 Ga), and the Mineiro Belt (2.47–2.02 Ga).-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsrestrito-
Palavras-chave: dc.subjectMonazite geochronology-
Palavras-chave: dc.subjectREE-Enriched pegmatites-
Palavras-chave: dc.subjectRestinga metagranite-
Palavras-chave: dc.subjectRitápolis magmatic arc-
Palavras-chave: dc.subjectMineiro belt-
Título: dc.titleMonazite age and composition from a granite-pegmatite system : a link between pegmatites of the São João del Rei Pegmatitic Province and the newly defined high-K Restinga Metagranite, Minas Gerais, Brazil.-
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