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    Geologic correlation between the Neoproterozoic Sergipano belt (NE Brazil) and the Yaounde belt (Cameroon, Africa)

    Access Status
    Fulltext not available
    Authors
    Oliveira, E.
    Toteu, S.
    Araujo, M.
    Carvalho, M.
    Nascimento, R.
    Bueno, J.
    McNaughton, Neal
    Basilici, G.
    Date
    2006
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Oliveira, E.P. and Toteu, S.F. and Araujo, M.N.C. and Carvalho, M.J. and Nascimento, R.S. and Bueno, J.F. and McNaughton, N. and Basilici, G. 2006. Geologic correlation between the Neoproterozoic Sergipano belt (NE Brazil) and the Yaounde belt (Cameroon, Africa). Journal of African Earth Sciences. 44 (4-5): pp. 470-478.
    Source Title
    Journal of African Earth Sciences
    DOI
    10.1016/j.jafrearsci.2005.11.014
    ISSN
    08995362
    Faculty
    John De Laeter Centre For Mass Spectrometry (JdL
    Faculty of Science and Engineering
    School
    John de Laeter Centre for Mass Spectrometry (COE)
    Remarks

    The link to the journal’s home page is: http://www.elsevier.com/wps/find/journaldescription.cws_home/691/description#description. Copyright © 2006 Elsevier B.V. All rights reserved

    URI
    http://hdl.handle.net/20.500.11937/42113
    Collection
    • Curtin Research Publications
    Abstract

    The Yaounde belt (Cameroon) and the Sergipano belt (NE Brazil) belonged to a major and continuous Neoproterozoic orogen at the northern margin of the ancient Congo-So Francisco craton. The Yaounde belt comprises schists, quartzites, gneisses and migmatitic gneisses grouped into three domains; the low-grade Mbalmayo Group in south and the medium- to high-grade Yaounde and Bafia Group in north. The Sergipano belt is divided into six domains, the three southernmost of which are mostly made up of clastic and chemical metasedimentary rocks whereas the others are more diverse with a migmatite-gneiss complex, and two metavolcanicplutonic complexes. In general, the two belts show structural vergence and decrease of metamorphic grade towards the craton; three main deformation phases are recognized in the Sergipano belt in contrast with two described in the Yaounde belt. The minimum age of Pan-African-Brasiliano collision in the Sergipano belt is constrained at 628 12 Ma on syn-collision granites, whereas in the Yaounde belt collision took place between 620 and 610 Ma, i.e. the age of granulite facies metamorphism. Sm-Nd isotope geochemistry and U-Pb age dating indicate that most clastic metasedimentary rocks in both belts were derived from sources to the north and, to a lesser degree, from the cratons to the south.

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