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dc.contributor.authorOliveira, E.
dc.contributor.authorWindley, B.
dc.contributor.authorMcNaughton, Neal
dc.contributor.authorPimental, M.
dc.contributor.authorFletcher, Ian
dc.date.accessioned2017-01-30T13:40:35Z
dc.date.available2017-01-30T13:40:35Z
dc.date.created2010-04-08T20:02:28Z
dc.date.issued2004
dc.identifier.citationOliveira, Elson and Windley, Brian and McNaughton, Neal and Pimental, Marcio and Fletcher, Ian. 2004. Contrasting copper and chromium metallogenic evolution of terranes in the Palaeoproterozoic Itabuna-Salvador-Curaca orogen, Sao Francisco craton, Brazil: new zircon (SHRIMP) and Sm-Nd (model) ages and their significance for orogen-parallel escape tectonics. Precambrian Research. 128 (1-2): pp. 143-165.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/33996
dc.identifier.doi10.1016/j.precamres.2003.09.018
dc.description.abstract

The northern segment of the Palaeoproterozoic Itabuna-Salvador-Cura collisional orogen in the Sao Francisco craton (Brazil) comprises two high-grade terranes separated by the 150 km long, N-S-trending Itiba Syenite. The Cura terrane to the west contains copper sulphide deposits hosted by hypersthenite-norite complexes (e.g. Caraiba body), whereas the Jacurici terrane to the east contains chromite deposits hosted by peridotite-norite sills (e.g. Medrado body). SHRIMP U-Pb dating of zircons, combined with a significant major element compositional gap indicates that the Caraiba (2580±10 Ma) and the Medrado (2085±5 Ma) mafic-ultramafic complexes are not related by fractional crystallisation as previously thought. Depleted-mantle Nd model ages for the regional gneisses are also distinct, with the Cura terrane having younger ages (2.4-2.8 Ga) than the Jacurici terrane (2.9-3.2 Ga), suggesting that they represent two independent fragments of continental crust accreted during the Palaeoproterozoic orogeny. Emplacements of the Itiba Syenite (ca. 2084 Ma) and of the Medrado complex were apparently coeval, probably controlled by orogen-parallel block displacement, or escape tectonics, following continent-continent collision.

dc.publisherElsevier Science BV
dc.subjectCopper sulphide
dc.subjectPalaeoproterozoic orogen
dc.subjectBrazil
dc.subjectGeochronology
dc.subjectChromite
dc.titleContrasting copper and chromium metallogenic evolution of terranes in the Palaeoproterozoic Itabuna-Salvador-Curaca orogen, Sao Francisco craton, Brazil: new zircon (SHRIMP) and Sm-Nd (model) ages and their significance for orogen-parallel escape tectonics
dc.typeJournal Article
dcterms.source.volume128
dcterms.source.startPage143
dcterms.source.endPage165
dcterms.source.issn03019268
dcterms.source.titlePrecambrian Research
curtin.note

The link to the journal’s home page is: http://www.elsevier.com/wps/find/journaldescription.cws_home/503357/description#description. Copyright © 2004 Elsevier B.V. All rights reserved

curtin.departmentJohn de Laeter Centre for Mass Spectrometry (COE)
curtin.accessStatusFulltext not available
curtin.facultyJohn De Laeter Centre For Mass Spectrometry (JdL
curtin.facultyFaculty of Science and Engineering


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