Mineral chemistry and crystallization parameters of the A-type Paleoproterozoic Bannach Granite, Carajás Province, Pará, Brazil

dc.citation.issue3pt_BR
dc.citation.spage575pt_BR
dc.citation.volume48pt_BR
dc.creatorMESQUITA, Caio José Soares
dc.creatorALMEIDA, José de Arimatéia Costa de
dc.creatorDALL'AGNOL, Roberto
dc.creator.Latteshttp://lattes.cnpq.br/9231404665122960pt_BR
dc.creator.Latteshttp://lattes.cnpq.br/1352422217507610pt_BR
dc.creator.Latteshttp://lattes.cnpq.br/2158196443144675pt_BR
dc.creator.ORCIDhttps://orcid.org/0000-0003-1754-295X
dc.date.accessioned2019-05-29T18:40:02Z
dc.date.available2019-05-29T18:40:02Z
dc.date.issued2018-09
dc.description.abstractThe A-type Paleoproterozoic Bannach Granite belongs to the Jamon Suíte and cross-cut the Archean units of the Rio Maria Domain in the Carajás Province. It comprises eight facies with varied mafic content and texture: even-grained cumulate granite (CG), even coarse-grained biotite-amphibole monzogranite (cBAMz), even coarse-grained amphibole-biotite monzogranite (cABMz), porphyritic biotite monzogranite (pBMz), even coarse-grained leucomonzogranite (cLMz), early even medium-grained leucomonzogranite (EmLMz), late even medium-grained leucomonzogranite (LmLMz) and even fine-grained leucomonzogranite (fLMz). In the less evolved facies, the dominant amphibole is Fe-hornblende passing to Fe-edenite or hastingsite, with associated cummingtonite/grunerite originated from the destabilization of clinopyroxene. Biotite has ferroan composition and approaches annite in the late-emplaced leucomonzogranite. Plagioclase varies from andesine to oligoclase or from oligoclase to albite. Titanite, magnetite, and ilmenite are found in all granite facies showing magmatic origin. The near liquidus temperatures vary between 943ºC and 795ºC and the estimated emplacement pressure is 300 ± 50 MPa (~11.1 ± 1.9 km). Amphibole Fe/(Fe + Mg) ratios together with magmatic magnetite and titanite indicate that these granites crystallized at moderately oxidizing conditions, similar to those admitted for the Jamon granite and magnetite series granites of Laurentia. However, the composition of biotite suggests a more reduced character close to NNO to NNO -0.5. The late leucomonzogranite facies is an exception because it displays high Fe/(Fe + Mg) ratios in biotite and approaches to the reduced granites of Carajás, Laurentia and Fennoscandia in this regard. It derived from a more reduced source than the other facies of Bannach Granitept_BR
dc.description.affiliationMESQUITA, C. J. S; DALL'AGNOL, R. Universidade federal do Parápt_BR
dc.description.sponsorshipPETROBRAS
dc.identifier.citationMESQUITA, Caio José Soares, DALL'AGNOL, Roberto, ALMEIDA, José de Arimatéia Costa de. Mineral chemistry and crystallization parameters of the A-type paleoproterozoic Bannach Granite, Carajás Province, Pará, Brazil. Brazilian Journal of Geology, São Paulo, v. 48 , n. 3, p. 575-601, jul./set. 2018. DOI : http://dx.doi.org/10.1590/2317-4889201820170082. Disponível em: http://repositorio.ufpa.br/jspui/handle/2011/11226. Acesso em:.pt_BR
dc.identifier.doihttp://dx.doi.org/10.1590/2317-4889201820170082 pt_BR
dc.identifier.issn2317-4692pt_BR
dc.identifier.urihttps://repositorio.ufpa.br/handle/2011/11226
dc.languageengpt_BR
dc.publisherSociedade Brasileira de Geologiapt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.initialsSBGpt_BR
dc.relation.ispartofBrazilian Journal of Geologypt_BR
dc.rightsAcesso Abertopt_BR
dc.source.urihttp://ref.scielo.org/68cpympt_BR
dc.subjectMineral chemistryen
dc.subjectCrystallization parameterspt_BR
dc.subjectA-type graniteen
dc.subjectBannachen
dc.subjectPaleoproterozoicen
dc.subjectCarajás Provinceen
dc.titleMineral chemistry and crystallization parameters of the A-type Paleoproterozoic Bannach Granite, Carajás Province, Pará, Brazilpt_BR
dc.typeArtigo de Periódicopt_BR
dcterms.citation.epage601pt_BR

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