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3.3Ga SHRIMP U-Pb zircon age of a felsic metavolcanic rock from the Mundo Novo greenstone belt in the San Francisco craton, Bahia (NE Brazil)

Peucat, J-J; Mascarenhas, J F; Barbosa, Johildo F. S.; de Souza, S L; Marinho, M M; Fanning, Christopher; Leite, C M M

Description

Felsic metavolcanics associated with supracrustal rocks provide U-Pb zircon and Sm-Nd TDM ages of approximately 3.3 Ga, which establish an Archean age of the Mundo Novo greenstone belt. A granodioritic gneiss from the Mairi complex, located on the eastern boundary of the Mundo Novo greenstone belt, exhibits a zircon evaporation minimum age of 3.04 Ga and a Nd model age of 3.2 Ga. These results constrain the occurrence of at least three major geological units in this area: the Archean Mundo Novo...[Show more]

CollectionsANU Research Publications
Date published: 2002
Type: Journal article
URI: http://hdl.handle.net/1885/94244
Source: Journal of South American Earth Sciences
DOI: 10.1016/S0895-9811(02)00044-5

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