Caracterização das ocorrências de grafita nos paragnaisses e quartzitos da porção nordeste do Cráton São Francisco, sul do estado de Sergipe

Detalhes bibliográficos
Autor(a) principal: Santos, Douglas Ferreira dos
Data de Publicação: 2018
Tipo de documento: Trabalho de conclusão de curso
Idioma: por
Título da fonte: Repositório Institucional da UFS
Texto Completo: http://ri.ufs.br/jspui/handle/riufs/9732
Resumo: The study of graphite occurrences in the northeast of the São Francisco Craton allowed the identification of graphite mineralized paragneisses and quartzite bodies inserted in the Esplanada-Boquim Granulitic Complex and the Rio Real-Itabaianinha-Riachão do Dantas Migmatite-Gneiss Complex. Petrographic studies showed that the paragneiss is represented by hypersthene-cordierite-graphite-garnet gneiss, formed by high grade metamorphism, in granulite facies, imposed on a sedimentary protolith. However, quartzites correspond to graphite-K-feldspar-cordierite quartzites, which were formed by the high-grade metamorphism of a quartz rich sedimentary rock, between amphibolite and granulite facies. The high-grade metamorphism conditions identified in the studied rocks are considered ideal for the Flake type formation, which present the best market values. Geochemical studies have suggested that the paragneiss’ protholiths may have been shales formed by intemperism of mafic igneous rocks generated in subduction - related environments, while quartzites derived from quartz sandstones from granitic rocks also in a subduction - related environment. In both cases the graphite confirms that there was availability of organic matter during the sedimentation of the protoliths. Based on the petrographic characterization of the graphites, it was possible to observe that the graphite of the paragneiss vary from the fine flakes to the extra large flakes, with a predominance of large flakes, while the graphite of the quartzites is classified as extra large flakes. Both rocks show that they originated from syngenetic mineralizing processes, formed from the transformation of primary organic matter into graphite through regional metamorphism
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spelling Santos, Douglas Ferreira dosLiz, Joaquim Daniel deLiz, Leidiane Cerqueira de Carvalho de2018-11-19T13:01:30Z2018-11-19T13:01:30Z2018-03-20Santos, Douglas Ferreira dos. Caracterização das ocorrências de grafita nos paragnaisses e quartzitos da porção nordeste do Cráton São Francisco, sul do estado de Sergipe. São Cristóvão, SE, 2018. Monografia (bacharelado em Geologia) – Curso de Geologia, Departamento de Geologia, Centro de Ciências Exatas e Tecnologia, Universidade Federal de Sergipe, São Cristóvão, 2018http://ri.ufs.br/jspui/handle/riufs/9732The study of graphite occurrences in the northeast of the São Francisco Craton allowed the identification of graphite mineralized paragneisses and quartzite bodies inserted in the Esplanada-Boquim Granulitic Complex and the Rio Real-Itabaianinha-Riachão do Dantas Migmatite-Gneiss Complex. Petrographic studies showed that the paragneiss is represented by hypersthene-cordierite-graphite-garnet gneiss, formed by high grade metamorphism, in granulite facies, imposed on a sedimentary protolith. However, quartzites correspond to graphite-K-feldspar-cordierite quartzites, which were formed by the high-grade metamorphism of a quartz rich sedimentary rock, between amphibolite and granulite facies. The high-grade metamorphism conditions identified in the studied rocks are considered ideal for the Flake type formation, which present the best market values. Geochemical studies have suggested that the paragneiss’ protholiths may have been shales formed by intemperism of mafic igneous rocks generated in subduction - related environments, while quartzites derived from quartz sandstones from granitic rocks also in a subduction - related environment. In both cases the graphite confirms that there was availability of organic matter during the sedimentation of the protoliths. Based on the petrographic characterization of the graphites, it was possible to observe that the graphite of the paragneiss vary from the fine flakes to the extra large flakes, with a predominance of large flakes, while the graphite of the quartzites is classified as extra large flakes. Both rocks show that they originated from syngenetic mineralizing processes, formed from the transformation of primary organic matter into graphite through regional metamorphismO estudo de ocorrências de grafita no nordeste do Cráton São Francisco permitiu identificar corpos de paragnaisses e quartzitos mineralizados em grafita inseridos no Complexo Granulítico Esplanada-Boquim (CGEB) e no Complexo Gnáissico-Migmatítico Rio Real-Itabaianinha-Riachão do Dantas (CGMRIR). Estudos petrográficos demonstraram que o paragnaisse é representado por um hiperstênio-cordierita-grafita-granada gnaisse formado pelo metamorfismo de alto grau, na fácies granulito, imposto a um protólito sedimentar. E, no entanto, que os quartzitos correspondem à grafita-K-feldspato-cordierita quartzitos, que foram formados pelo metamorfismo de alto grau de uma rocha sedimentar rica em quartzo, entre as fácies anfibolito e granulito. As condições de metamorfismo de alto grau, identificadas nas rochas estudadas, são consideradas ideais para a formação de grafitas tipo Flake, que apresentam os melhores valores de mercado. Estudos geoquímicos sugeriram que os protólitos dos paragnaisses podem ter sido folhelhos provenientes de rochas ígneas máficas em ambientes relacionados com subducção, enquanto que os quartzitos derivaram de arenitos quarzosos provenientes de rochas graníticas também em ambiente relacionado com subducção. Em ambos os casos a grafita constata que houve disponibilidade de matéria orgânica durante a sedimentação dos protólitos. Com base na caracterização petrográfica das grafitas, foi possível observar que a grafita dos paragnaisses variam dos tipos flakes finos a flakes extragrandes, com predomínio de flakes grandes, enquanto que a grafita dos quartzitos é classificada como flakes extragrandes. O estudo da grafita em ambas as rochas mostram que estas foram originadas a partir de processos mineralizadores singenéticos, formadas a partir da transformação, in situ, da matéria orgânica primária em grafita através do metamorfismo regionalSão Cristóvão, SEporGeologiaEnsino de geologiaGranulitoGrafitizaçãoDepósito singenéticoCráton do São Francisco, Sergipe (SE)GraphitizatioSyngenetic depositCIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::GEOLOGIA::SEDIMENTOLOGIACaracterização das ocorrências de grafita nos paragnaisses e quartzitos da porção nordeste do Cráton São Francisco, sul do estado de Sergipeinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/bachelorThesisUniversidade Federal de SergipeDGEOL - Departamento de Geologia – São Cristóvão - Presencialreponame:Repositório Institucional da UFSinstname:Universidade Federal de Sergipe (UFS)instacron:UFSinfo:eu-repo/semantics/openAccessTEXTDouglas_Ferreira_Santos.pdf.txtDouglas_Ferreira_Santos.pdf.txtExtracted texttext/plain122641https://ri.ufs.br/jspui/bitstream/riufs/9732/3/Douglas_Ferreira_Santos.pdf.txt8b7f08f0f81b6f0bebc1f5aae711c648MD53THUMBNAILDouglas_Ferreira_Santos.pdf.jpgDouglas_Ferreira_Santos.pdf.jpgGenerated Thumbnailimage/jpeg1331https://ri.ufs.br/jspui/bitstream/riufs/9732/4/Douglas_Ferreira_Santos.pdf.jpgd0eed0d4c726773336c99df9cb31a566MD54ORIGINALDouglas_Ferreira_Santos.pdfDouglas_Ferreira_Santos.pdfapplication/pdf2437369https://ri.ufs.br/jspui/bitstream/riufs/9732/2/Douglas_Ferreira_Santos.pdf5c52651ea0f69575e012ca790ab57756MD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81475https://ri.ufs.br/jspui/bitstream/riufs/9732/1/license.txt098cbbf65c2c15e1fb2e49c5d306a44cMD51riufs/97322018-11-19 10:01:30.381oai:ufs.br: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Repositório InstitucionalPUBhttps://ri.ufs.br/oai/requestrepositorio@academico.ufs.bropendoar:2018-11-19T13:01:30Repositório Institucional da UFS - Universidade Federal de Sergipe (UFS)false
dc.title.pt_BR.fl_str_mv Caracterização das ocorrências de grafita nos paragnaisses e quartzitos da porção nordeste do Cráton São Francisco, sul do estado de Sergipe
title Caracterização das ocorrências de grafita nos paragnaisses e quartzitos da porção nordeste do Cráton São Francisco, sul do estado de Sergipe
spellingShingle Caracterização das ocorrências de grafita nos paragnaisses e quartzitos da porção nordeste do Cráton São Francisco, sul do estado de Sergipe
Santos, Douglas Ferreira dos
Geologia
Ensino de geologia
Granulito
Grafitização
Depósito singenético
Cráton do São Francisco, Sergipe (SE)
Graphitizatio
Syngenetic deposit
CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::GEOLOGIA::SEDIMENTOLOGIA
title_short Caracterização das ocorrências de grafita nos paragnaisses e quartzitos da porção nordeste do Cráton São Francisco, sul do estado de Sergipe
title_full Caracterização das ocorrências de grafita nos paragnaisses e quartzitos da porção nordeste do Cráton São Francisco, sul do estado de Sergipe
title_fullStr Caracterização das ocorrências de grafita nos paragnaisses e quartzitos da porção nordeste do Cráton São Francisco, sul do estado de Sergipe
title_full_unstemmed Caracterização das ocorrências de grafita nos paragnaisses e quartzitos da porção nordeste do Cráton São Francisco, sul do estado de Sergipe
title_sort Caracterização das ocorrências de grafita nos paragnaisses e quartzitos da porção nordeste do Cráton São Francisco, sul do estado de Sergipe
author Santos, Douglas Ferreira dos
author_facet Santos, Douglas Ferreira dos
author_role author
dc.contributor.author.fl_str_mv Santos, Douglas Ferreira dos
dc.contributor.advisor1.fl_str_mv Liz, Joaquim Daniel de
dc.contributor.advisor-co1.fl_str_mv Liz, Leidiane Cerqueira de Carvalho de
contributor_str_mv Liz, Joaquim Daniel de
Liz, Leidiane Cerqueira de Carvalho de
dc.subject.por.fl_str_mv Geologia
Ensino de geologia
Granulito
Grafitização
Depósito singenético
topic Geologia
Ensino de geologia
Granulito
Grafitização
Depósito singenético
Cráton do São Francisco, Sergipe (SE)
Graphitizatio
Syngenetic deposit
CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::GEOLOGIA::SEDIMENTOLOGIA
dc.subject.eng.fl_str_mv Cráton do São Francisco, Sergipe (SE)
Graphitizatio
Syngenetic deposit
dc.subject.cnpq.fl_str_mv CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::GEOLOGIA::SEDIMENTOLOGIA
description The study of graphite occurrences in the northeast of the São Francisco Craton allowed the identification of graphite mineralized paragneisses and quartzite bodies inserted in the Esplanada-Boquim Granulitic Complex and the Rio Real-Itabaianinha-Riachão do Dantas Migmatite-Gneiss Complex. Petrographic studies showed that the paragneiss is represented by hypersthene-cordierite-graphite-garnet gneiss, formed by high grade metamorphism, in granulite facies, imposed on a sedimentary protolith. However, quartzites correspond to graphite-K-feldspar-cordierite quartzites, which were formed by the high-grade metamorphism of a quartz rich sedimentary rock, between amphibolite and granulite facies. The high-grade metamorphism conditions identified in the studied rocks are considered ideal for the Flake type formation, which present the best market values. Geochemical studies have suggested that the paragneiss’ protholiths may have been shales formed by intemperism of mafic igneous rocks generated in subduction - related environments, while quartzites derived from quartz sandstones from granitic rocks also in a subduction - related environment. In both cases the graphite confirms that there was availability of organic matter during the sedimentation of the protoliths. Based on the petrographic characterization of the graphites, it was possible to observe that the graphite of the paragneiss vary from the fine flakes to the extra large flakes, with a predominance of large flakes, while the graphite of the quartzites is classified as extra large flakes. Both rocks show that they originated from syngenetic mineralizing processes, formed from the transformation of primary organic matter into graphite through regional metamorphism
publishDate 2018
dc.date.accessioned.fl_str_mv 2018-11-19T13:01:30Z
dc.date.available.fl_str_mv 2018-11-19T13:01:30Z
dc.date.issued.fl_str_mv 2018-03-20
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/bachelorThesis
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dc.identifier.citation.fl_str_mv Santos, Douglas Ferreira dos. Caracterização das ocorrências de grafita nos paragnaisses e quartzitos da porção nordeste do Cráton São Francisco, sul do estado de Sergipe. São Cristóvão, SE, 2018. Monografia (bacharelado em Geologia) – Curso de Geologia, Departamento de Geologia, Centro de Ciências Exatas e Tecnologia, Universidade Federal de Sergipe, São Cristóvão, 2018
dc.identifier.uri.fl_str_mv http://ri.ufs.br/jspui/handle/riufs/9732
identifier_str_mv Santos, Douglas Ferreira dos. Caracterização das ocorrências de grafita nos paragnaisses e quartzitos da porção nordeste do Cráton São Francisco, sul do estado de Sergipe. São Cristóvão, SE, 2018. Monografia (bacharelado em Geologia) – Curso de Geologia, Departamento de Geologia, Centro de Ciências Exatas e Tecnologia, Universidade Federal de Sergipe, São Cristóvão, 2018
url http://ri.ufs.br/jspui/handle/riufs/9732
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dc.publisher.initials.fl_str_mv Universidade Federal de Sergipe
dc.publisher.department.fl_str_mv DGEOL - Departamento de Geologia – São Cristóvão - Presencial
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