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

Autor:	Moacyr Moura Marinho, Johildo Figueiredo Salomão Barbosa, S L de Souza, Christopher Fanning, C M M Leite, J F Mascarenhas, J.J. Peucat
Rok vydání:	2002
Předmět:	Felsic Metavolcanic rock Archean Geochemistry Geology Greenstone belt São Francisco Craton Earth-Surface Processes Shrimp Gneiss Zircon
Zdroj:	Journal of South American Earth Sciences. 15:363-373
ISSN:	0895-9811
DOI:	10.1016/s0895-9811(02)00044-5
Popis:	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 greenstone belt, the Archean Mairi gneisses, and the adjoining Paleoproterozoic (
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::63c5fe8896176916f36e7742626e4be8 https://doi.org/10.1016/s0895-9811(02)00044-5 Zobrazit plný text záznamu Full Text from ScienceDirect