Os plut?ns Fel?cio e Merc?s: registros da orog?nese Riaciana-Orosiriana no bloco Guanh?es
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFVJM |
Texto Completo: | http://acervo.ufvjm.edu.br/jspui/handle/1/2423 |
Resumo: | ?rea de concentra??o: Geologia Regional. |
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Grochowski, Julia DiasAmaral, Matheus Henrique Kuchenbecker doViana, R?bia RibeiroTedeschi, Mahyra FerreiraNovo, Tiago Am?ncioUniversidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)Amaral, Matheus Henrique Kuchenbecker do2021-02-19T14:26:43Z2021-02-19T14:26:43Z20192019-05-31GROCHOWSKI, Julia Dias. Os plut?ns Fel?cio e Merc?s: registros da orog?nese Riaciana-Orosiriana no bloco Guanh?es. 2019. 89 p. Disserta??o (Mestrado em Geologia) ? Programa de P?s-gradua??o em Geologia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, 2019.http://acervo.ufvjm.edu.br/jspui/handle/1/2423?rea de concentra??o: Geologia Regional.Texto da obra em outro idioma: (Ingl?s) p. 17-64.Palavras-chave retiradas da Ficha Catalogr?fica.As rochas gran?ticas que ocorrem na regi?o norte do bloco Guanh?es - um dos blocos do embasamento presentes no Or?geno Ara?ua? - foram pioneiramente investigadas no in?cio do s?culo XX, e desde ent?o eram consideradas como parte de um ?nico corpo ?gneo, identificado como Bat?lito Rio Itangu? nos mapas geol?gicos regionais. No ?mbito deste projeto de mestrado, investiga??es de campo e an?lises petrogr?ficas e geof?sicas subsidiaram a subdivis?o dessas rochas em dois diferentes pl?tons - nomeados como Fel?cio e Merc?s - bem como uma revis?o de sua ?rea de ocorr?ncia. O Pl?ton Fel?cio cont?m granodioritos mesocr?ticos de granula??o fina, com a mineralogia principal composta por biotita, plagiocl?sio, K-feldspato, epidoto e quartzo, e allanita, apatita, titanita e zirc?o como minerais acess?rios. Essas rochas s?o metaluminosas, de baixo pot?ssio, magnesianas e c?lcicas a calc-alcalinas, para as quais foi obtida uma idade de conc?rdia U-Pb em zirc?es de 2151 ? 12 Ma. O Pluton Merc?s, por sua vez, cont?m monzogranitos e sienogranitos de granula??o fina a m?dia, leucocr?ticos e com variedades porfir?ticas e equigranulares. Os principais minerais constituintes dos monzogranitos s?o biotita, muscovita, plagiocl?sio, K-feldspato e quartzo, e dos sienogranitos s?o quartzo, K-feldspato, hornblenda e plagiocl?sio. Essas rochas s?o ricas em pot?ssio, peraluminosas, ferroanas e alc?licas a ?lcali-c?lcicas, cujos dados apresentaram uma disc?rdia com interceptos superior de 2014 ? 11 Ma e inferior de 539 ? 13 Ma, interpretados como idade de cristaliza??o e metamorfismo, respectivamente. Apesar de terem assinaturas geoqu?micas e geocronol?gicas distintas, os pl?tons Fel?cio e Merc?s apresentam algumas caracter?sticas comuns, como o enriquecimento em LILE, ETR leves e elementos HFS altamente incompat?veis, al?m de anomalias negativas de Ti, Ta, Nb, e P, o que pode indicar uma fonte comum para os magmas que deram origem aos dois pl?tons. As idades de cristaliza??o dos plutons s?o compat?veis com o evento orog?nico Paleoproteroz?ico que amalgamou o paleocontinente S?o Francisco-Congo, que apresenta registros dentro do cr?ton S?o Francisco e em blocos do embasamento contidos no Or?geno Ara?ua?. O Pl?ton Fel?cio ? atribu?do ao est?gio acrescion?rio do evento, apresentando poss?vel correla??o com o Arco Mantiqueira. Por sua vez, o Pl?ton Merc?s est? relacionado ao est?gio tardi a p?s-colisional da orogenia, contempor?neo ao processo de colapso gravitacional da cadeia de montanhas. Sugere-se que a cunha mant?lica metassomatizada por fluidos provenientes da desidrata??o da litosfera subductada tenha atuado como fonte para ambos os pl?tons, ao passo que a espessa crosta continental resultante da colis?o parece ter atuado como fonte secund?ria do magma que originou o Pl?ton Merc?s. Pela primeira vez, registros da orogenia Paleoproteroz?ica s?o relatados no bloco Guanh?es. Essas informa??es contribuem para o aumento do nosso conhecimento de processos tect?nicos que levaram ? agrega??o do bloco continental S?o Francisco-Congo, uma pe?a chave no cen?rio Pr?-Cambriano global.Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2021-02-19T14:25:18Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) julia_dias_grochowski.pdf: 4553962 bytes, checksum: 140254b8777c9eeb78b1f9e8709da30f (MD5)Approved for entry into archive by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2021-02-19T14:26:43Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) julia_dias_grochowski.pdf: 4553962 bytes, checksum: 140254b8777c9eeb78b1f9e8709da30f (MD5)Made available in DSpace on 2021-02-19T14:26:43Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) julia_dias_grochowski.pdf: 4553962 bytes, checksum: 140254b8777c9eeb78b1f9e8709da30f (MD5) Previous issue date: 2019Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)Disserta??o (Mestrado) ? Programa de P?s-gradua??o em Geologia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2019.The granitic rocks that occur in the northern region of the Guanh?es block, one of the basement inliers present in the Ara?ua? orogen, were first studied in the beginning of the 20th century, and, since then, are considered part of a single igneous body mapped as Rio Itangu? batholith in the regional geologic maps. In the present study, field investigations, petrographic and geophysical analyses subsidized the subdivision of the rocks in two different plutons, named Fel?cio and Merc?s, and a review on their occurrence area. Fel?cio pluton is composed of mesocratic fine-grained granodiorites with the main mineralogy consisting of biotite, plagioclase, K-feldspar, epidote and quartz, and allanite, apatite, titanite and zircon as accessory minerals. These rocks are low-K, magnesian, calcic to calc-alkalic and metaluminous, and yielded a U-Pb zircon crystallization age of 2151 ? 12 Ma. Merc?s pluton is composed of equigranular and porphyritic mediumgrained leucocratic monzogranites and syenogranites. The monzogranites have biotite, muscovite, plagioclase, K-feldspar, quartz as their main mineralogy, and the same accessories as the granodiorites from Fel?cio pluton, and the syenogranites are composed of quartz, k-feldspar, hornblende and plagioclase. Merc?s pluton rocks are rich in K, ferroan, alkali-calcic to alkalic and peraluminous, and yielded a discordia upper intercept age of 2014 ? 11 Ma and a lower intercept at 539 ? 13 Ma, interpreted as the crystallization age and the metamorphic overprint, respectively. Although the plutons have different geochemical and geochronological signatures, they also have common points such as the enrichment in LILE, LREE and highly incompatible HFSE and negative anomalies of Ti, Ta, Nb, and P, which indicates a common source for the magmas that originated the two plutons. The emplacement ages of the plutons are coeval with the Paleoproterozoic orogenic event that assembled the S?o Francisco-Congo paleocontinent, which left many records both inside the S?o Francisco craton and in basement inliers within the Ara?ua? orogen. Fel?cio pluton is correlated to the accretionary stage of the event, presenting a possible correlation with Mantiqueira arc. In turn, Merc?s pluton is related to the late- to post-collisional stage of the orogeny, coeval with the gravitational collapse of the mountain belt. It is suggested that the mantle wedge metasomatized by fluids from slab dehydration acted as a source for the magmas that generated both plutons, whereas the continental crust thickened by the collision of the blocks seem to have been a secondary source for the generation of Merc?s pluton. For the first time, records of the Paleoproterozoic orogeny are reported in the Guanh?es block. These findings help to enhance our knowledge on the tectonic processes that led to the assembly of the S?o Francisco-Congo paleocontinent, a key piece in the world?s Precambrian scenario.porUFVJMA concess?o da licen?a deste item refere-se ao ? termo de autoriza??o impresso assinado pelo autor, assim como na licen?a Creative Commons, com as seguintes condi??es: Na qualidade de titular dos direitos de autor da publica??o, autorizo a Universidade Federal dos Vales do Jequitinhonha e Mucuri e o IBICT a disponibilizar por meio de seus reposit?rios, sem ressarcimento dos direitos autorais, de acordo com a Lei n? 9610/98, o texto integral da obra disponibilizada, conforme permiss?es assinaladas, para fins de leitura, impress?o e/ou download, a t?tulo de divulga??o da produ??o cient?fica brasileira, e preserva??o, a partir desta data.info:eu-repo/semantics/openAccessOs plut?ns Fel?cio e Merc?s: registros da orog?nese Riaciana-Orosiriana no bloco Guanh?esinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisBloco Guanh?esPl?ton F?l?cioPl?ton Merc?sOrog?nese Riaciana-Orosirianareponame:Repositório Institucional da UFVJMinstname:Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)instacron:UFVJMTEXTjulia_dias_grochowski.pdf.txtjulia_dias_grochowski.pdf.txtExtracted texttext/plain153409http://acervo.ufvjm.edu.br/jspui/bitstream/1/2423/6/julia_dias_grochowski.pdf.txt8475f7e4bfcc3c59f1cb2aa8b936d2c7MD56LICENSElicense.txtlicense.txttext/plain; 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dc.title.pt_BR.fl_str_mv |
Os plut?ns Fel?cio e Merc?s: registros da orog?nese Riaciana-Orosiriana no bloco Guanh?es |
title |
Os plut?ns Fel?cio e Merc?s: registros da orog?nese Riaciana-Orosiriana no bloco Guanh?es |
spellingShingle |
Os plut?ns Fel?cio e Merc?s: registros da orog?nese Riaciana-Orosiriana no bloco Guanh?es Grochowski, Julia Dias Bloco Guanh?es Pl?ton F?l?cio Pl?ton Merc?s Orog?nese Riaciana-Orosiriana |
title_short |
Os plut?ns Fel?cio e Merc?s: registros da orog?nese Riaciana-Orosiriana no bloco Guanh?es |
title_full |
Os plut?ns Fel?cio e Merc?s: registros da orog?nese Riaciana-Orosiriana no bloco Guanh?es |
title_fullStr |
Os plut?ns Fel?cio e Merc?s: registros da orog?nese Riaciana-Orosiriana no bloco Guanh?es |
title_full_unstemmed |
Os plut?ns Fel?cio e Merc?s: registros da orog?nese Riaciana-Orosiriana no bloco Guanh?es |
title_sort |
Os plut?ns Fel?cio e Merc?s: registros da orog?nese Riaciana-Orosiriana no bloco Guanh?es |
author |
Grochowski, Julia Dias |
author_facet |
Grochowski, Julia Dias |
author_role |
author |
dc.contributor.referee.none.fl_str_mv |
Amaral, Matheus Henrique Kuchenbecker do Viana, R?bia Ribeiro Tedeschi, Mahyra Ferreira |
dc.contributor.advisorco.none.fl_str_mv |
Novo, Tiago Am?ncio |
dc.contributor.institution.pt_BR.fl_str_mv |
Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM) |
dc.contributor.author.fl_str_mv |
Grochowski, Julia Dias |
dc.contributor.advisor1.fl_str_mv |
Amaral, Matheus Henrique Kuchenbecker do |
contributor_str_mv |
Amaral, Matheus Henrique Kuchenbecker do |
dc.subject.keyword.pt_BR.fl_str_mv |
Bloco Guanh?es Pl?ton F?l?cio Pl?ton Merc?s Orog?nese Riaciana-Orosiriana |
topic |
Bloco Guanh?es Pl?ton F?l?cio Pl?ton Merc?s Orog?nese Riaciana-Orosiriana |
description |
?rea de concentra??o: Geologia Regional. |
publishDate |
2019 |
dc.date.submitted.none.fl_str_mv |
2019-05-31 |
dc.date.issued.fl_str_mv |
2019 |
dc.date.accessioned.fl_str_mv |
2021-02-19T14:26:43Z |
dc.date.available.fl_str_mv |
2021-02-19T14:26:43Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
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masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
GROCHOWSKI, Julia Dias. Os plut?ns Fel?cio e Merc?s: registros da orog?nese Riaciana-Orosiriana no bloco Guanh?es. 2019. 89 p. Disserta??o (Mestrado em Geologia) ? Programa de P?s-gradua??o em Geologia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, 2019. |
dc.identifier.uri.fl_str_mv |
http://acervo.ufvjm.edu.br/jspui/handle/1/2423 |
identifier_str_mv |
GROCHOWSKI, Julia Dias. Os plut?ns Fel?cio e Merc?s: registros da orog?nese Riaciana-Orosiriana no bloco Guanh?es. 2019. 89 p. Disserta??o (Mestrado em Geologia) ? Programa de P?s-gradua??o em Geologia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, 2019. |
url |
http://acervo.ufvjm.edu.br/jspui/handle/1/2423 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
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openAccess |
dc.publisher.none.fl_str_mv |
UFVJM |
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UFVJM |
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