Proveniência dos metassedimentos do grupo araxá na região de Caldas Novas, Goiás

Autor: Navarro, Guillermo Rafael Beltran [UNESP], Zanardo, Antenor [UNESP], Montibeller, Cibele Carolina [UNESP], da Conceição, Fabiano Tomazini [UNESP], Valeriano, Claudio de Morisson, Leme, Haís Güitzlaf [UNESP], Simões, Luiz Sérgio Amarante [UNESP]
Přispěvatelé: Universidade Estadual Paulista (UNESP), Universidade do Estado do Rio de Janeiro (UERJ)
Jazyk: portugalština
Rok vydání: 2017
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Zdroj: Scopus
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Popis: Made available in DSpace on 2022-04-29T08:14:24Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-01-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) In the Caldas Novas - Rio Quente region (Goiás State, Brazil) outcrop psammitic, psamo-pelitic and pelitic metasediments related to the Araxá Group. These metasediments have La(N)/Lu(N), La/Sc, Th/Sc, La/Co, Th/Co and Cr/Th rates suggesting that the source were felsic rocks from magmatic arcs. The model ages obtained vary between 1.26 and 1.97 Ga suggesting two sources for these metasediments: a juvenile Neoproterozoic source, and another older source related to paleoproterozoic rocks, as observed in other regions of the Brasília Belt. The U/Pb zircon ages obtained in metasediments from this region are predominantly of Neoproterozoic age ( 1.0 Ga). The congruence of these geochronological data with geochemical signatures of analyzed rocks suggest that much of the metasediments from the Araxá Group in the region had as source magmatic arc rocks formed in Neoproterozoic, resulting in the development of forearc basins, in which the studied sequence could probably have been deposited.. Instituto de Geociências e Ciências Exatas Departamento de Petrologia e Metalogenia Universidade Estadual Paulista, Campus de Rio Claro Faculdade de Geologia Departamento de Geologia Regional e Geotectônica Universidade do Estado do Rio de Janeiro (UERJ) Instituto de Geociências e Ciências Exatas Departamento de Petrologia e Metalogenia Universidade Estadual Paulista, Campus de Rio Claro FAPESP: Nº 2013/04235-2
Databáze: OpenAIRE
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