Crustal evolution between 2.0 and 3.5 Ga in the southern Gaviao block (Umburanas-Brumado-Aracatu region), Sao Francisco Craton, Brazil: A 3.5-3.8 Ga photo-crust in the Gaviao block?
Date
2012
Authors
Santos-Pinto, Marilda
Peucat, J-J
Martin, H
Barbosa, Johildo F. S.
Fanning, Christopher
Cocherie, Alain
Paquette, Jean-Louis
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Publisher
Pergamon-Elsevier Ltd
Abstract
The main evolution of the Gavião block in the Umburanas-Brumado-Aracatu region, in the state of Bahia, is defined by several sets of tonalitic-trondhjemitic and granodioritic gneisses emplaced during the Paleoarchean. The juvenile Bernada gneisses are em
Description
Keywords
Keywords: Archean; crustal evolution; gneiss; granodiorite; in situ measurement; monazite; partial melting; samarium-neodymium dating; SHRIMP dating; tonalite; trondhjemite; zircon; Bahia; Brazil; Sao Francisco Craton; Decapoda (Crustacea) Archean and Paleoproterozoic; Bahia-Brazil; Gavião block; In-situ monazite ages (EPMA, LA-ICPMS); SHRIMP zircon ages; Sm-Nd
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Source
Journal of South American Earth Sciences
Type
Journal article
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2037-12-31