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dc.contributor.authorBarbosa Teixeira, M.
dc.contributor.authorDall'Agnol, R.
dc.contributor.authorSchneider Santos, J.
dc.contributor.authorCarvalho de Oliveira, D.
dc.contributor.authorLamarão, C.
dc.contributor.authorMcNaughton, Neal
dc.date.accessioned2018-12-13T09:11:59Z
dc.date.available2018-12-13T09:11:59Z
dc.date.created2018-12-12T02:46:42Z
dc.date.issued2018
dc.identifier.citationBarbosa Teixeira, M. and Dall'Agnol, R. and Schneider Santos, J. and Carvalho de Oliveira, D. and Lamarão, C. and McNaughton, N. 2018. Crystallization ages of Paleoproterozoic A-type granites of Carajás province, Amazon craton: Constraints from U-Pb geochronology of zircon and titanite. Journal of South American Earth Sciences. 88: pp. 312-331.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/71972
dc.identifier.doi10.1016/j.jsames.2018.08.020
dc.description.abstract

New U-Pb SHRIMP dating in zircon and titanite showed that the three large Paleoproterozoic A-type granite Suites and related granites from Carajás Province of the Amazon Craton (Brazil) were emplaced between 1880 Ma and 1857 Ma, with the main magmatic peak at 1880 Ma. Some particular ages not reported before have been identified: (i) ages of 1865 Ma to 1857 Ma in leucogranite facies of the Redenção and Bannach plutons, that are younger, were generated by independent magma pulses and are not cogenetic with the dominant ~1880 Ma old granites of the respective plutons; (ii) an age of 1732 ± 6 Ma obtained in the leucogranite facies of the Antônio Vicente pluton of the Velho Guilherme Suite that could represent a magmatic event in the Xingu Region not yet reported or, eventually, could correspond to an isolate hydrothermal event that allowed the growth of zircons. The more detailed geochronological data obtained in the Paleoproteozoic A-type granites of Carajás Province, added to the information available in the literature, demonstrate the relevance of the magmatic event at ~1880 Ma and indicate that the emplacement of those granites was done in about ~20 m.y. that means in a relatively short geological time. This 1880 Ma magmatic episode was also intense in other provinces of the Amazon Craton, where it is linked mostly to the formation of the Uatumã Silicic Large Igneous Province. This event was mostly extensional and isalso registered in several cratons worldwide demonstrating its relevance in the tectonic evolution of Proterozoic continents.

dc.publisherPergamon
dc.titleCrystallization ages of Paleoproterozoic A-type granites of Carajás province, Amazon craton: Constraints from U-Pb geochronology of zircon and titanite
dc.typeJournal Article
dcterms.source.volume88
dcterms.source.startPage312
dcterms.source.endPage331
dcterms.source.issn0895-9811
dcterms.source.titleJournal of South American Earth Sciences
curtin.departmentJohn de Laeter Centre
curtin.accessStatusFulltext not available


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