Pseudosection modeling and U-Pb geochronology on Piranga schists : role of Brasiliano Orogeny in the Southeastern Quadrilátero Ferrífero, Minas Gerais, Brazil.

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dc.contributor.authorQueiroz, Yanne da Silva
dc.contributor.authorQueiroga, Gláucia Nascimento
dc.contributor.authorMoraes, Renato de
dc.contributor.authorFernandes, Victor Matheus Tavares
dc.contributor.authorMedeiros Júnior, Edgar Batista de
dc.contributor.authorEvangelista, Hanna Jordt
dc.contributor.authorSchulz, Bernhard
dc.contributor.authorSchmiedel, Julia
dc.contributor.authorMartins, Maximiliano de Souza
dc.contributor.authorCastro, Marco Paulo de
dc.contributor.authorLana, Cristiano de Carvalho
dc.date.accessioned2020-04-09T21:47:56Z
dc.date.available2020-04-09T21:47:56Z
dc.date.issued2019
dc.description.abstractIn the Southeastern Quadrilátero Ferrífero, a package of metapelitic rocks previously attributed to the Archean Rio das Velhas Supergroup crops out in Piranga locality. This study presents the mineral chemistry and U-Pb-Hf zircon geochronology on foliated staurolite-garnet mica schists. Garnet and staurolite index minerals are syn- to post-kinematic towards the main schistosity. Garnet porphyroblasts display well-developed compositional zoning of Mg-Fe-Mn-Ca, with increase of almandine and pyrope and decrease of spessartine towards the rim, implying in prograde metamorphic pattern. Estimates of P-T values for the metamorphic peak resulted in temperatures between 630 to 650ºC and pressure around 7 kbar. Pseudosections show well-defined stability fields in amphibolite facies, with a metamorphic path displaying progressive increase in P-T conditions. Maximum depositional age of 1,875 ± 51 Ma is established for the Piranga mica schists pointing to a depositional history that is younger than those previously described. Metamorphic Cambrian ages characterize the strong influence of deformational processes related to the final stages of Brasiliano Orogeny in the Southeastern Quadrilátero Ferrífero.pt_BR
dc.identifier.citationQUEIROZ, Y. da S. et al. Pseudosection modeling and U-Pb geochronology on Piranga schists: role of Brasiliano Orogeny in the Southeastern Quadrilátero Ferrífero, Minas Gerais, Brazil. Brazilian Journal of Geology, São Paulo, v. 49, n. 3, p. 1-11, out. 2019. Disponível em: <http://www.scielo.br/scielo.php?pid=S2317-48892019000300306&script=sci_arttext>. Acesso em: 10 mar. 2020.pt_BR
dc.identifier.doihttps://doi.org/10.1590/2317-4889201920180136 pt_BR
dc.identifier.issn2317-4692
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/12053
dc.language.isoen_USpt_BR
dc.rightsabertopt_BR
dc.rights.licenseThis is an open access article distributed under the terms of the Creative Commons license. Fonte: o próprio artigo.pt_BR
dc.subjectSão Francisco Cratonpt_BR
dc.subjectPelitic rockspt_BR
dc.subjectU-Pb zircon and monazite geochronologypt_BR
dc.subjectLu-Hf isotopespt_BR
dc.titlePseudosection modeling and U-Pb geochronology on Piranga schists : role of Brasiliano Orogeny in the Southeastern Quadrilátero Ferrífero, Minas Gerais, Brazil.pt_BR
dc.typeArtigo publicado em periodicopt_BR
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