Academic literature on the topic 'Faixa Paraguai'
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Journal articles on the topic "Faixa Paraguai"
Nascimento, Valdir Aragão, and Sônia Maria Oliveira de Andrade. "As armas dos fracos: estratégias, táticas e repercussões identitárias na dinâmica do acesso à saúde na fronteira Brasil/Paraguai." Horizontes Antropológicos 24, no. 50 (April 2018): 181–214. http://dx.doi.org/10.1590/s0104-71832018000100007.
Full textGodoy, Antonio Misson, Amarildo Salina Ruiz, Jefferson Cassu Manzano, and Larissa Marques Barbosa de Araújo-Ruiz. "Os granitóides brasilianos da faixa de dobramentos Paraguai, MS e MT." Geologia USP. Série Científica 7, no. 1 (April 1, 2007): 29–44. http://dx.doi.org/10.5327/z1519-874x2007000100003.
Full textGodoy, Antonio Misson, Francisco Egidio Cavalcante Pinho, Jefferson Cassu Manzano, Larissa Marques Barbosa de Araújo, Jesué Antonio da Silva, and Marcos Figueiredo. "Estudos isotópicos das rochas granitóides neoproterozóicas da Faixa de Dobramento Paraguai." Revista Brasileira de Geociências 40, no. 3 (September 1, 2010): 380–91. http://dx.doi.org/10.25249/0375-7536.2010403380391.
Full textALVARENGA, CARLOS J. S., and ROLAND TROMPETTE. "EVOLUÇÃO TECTÔNICA BRASILIANA DA FAIXA PARAGUAI: A ESTRUTURAÇÃO DA REGIÃO DE CUIABÁ." Revista Brasileira de Geociências 23, no. 1 (March 1, 1993): 18–30. http://dx.doi.org/10.25249/0375-7536.19932311830.
Full textPINTO, Raiane Paim, and Maria Luzia da Silva SANTANA. "A Educação Especial Inclusiva em Contexto de Diversidade Cultural e Linguística: Práticas Pedagógicas e Desafios de Professoras em Escolas de Fronteira." Revista Brasileira de Educação Especial 26, no. 3 (July 2020): 495–510. http://dx.doi.org/10.1590/1980-54702020v26e0199.
Full textSantos, Regerson Franklin, Márcio Nolasco Leite, and Beatriz Vera. "Por fronteiras dobráveis no limiar da linha entre o Brasil e o Paraguai." ENTRE-LUGAR 10, no. 20 (December 8, 2019): 62–84. http://dx.doi.org/10.30612/el.v10i20.10466.
Full textBueno, Mara Lucinéia Marques Correa, and Jadiane Maciel Ajala. "A integração regional e a influência nos programas educacionais de fronteira entre Brasil e Paraguai." Horizontes - Revista de Educação 7, no. 14 (December 19, 2019): 107–22. http://dx.doi.org/10.30612/hre.v7i14.8799.
Full textNOGUEIRA, AFONSO CÉSAR RODRIGUES, and CLAUDIO RICCOMINI. "O GRUPO ARARAS (NEOPROTEROZÓICO) NA PARTE NORTE DA FAIXA PARAGUAI E SUL DO CRATON AMAZÔNICO, BRASIL." Revista Brasileira de Geociências 36, no. 4 (December 1, 2006): 576–87. http://dx.doi.org/10.25249/0375-7536.2006364576587.
Full textZaffari, Gabriel Luiz, Amarildo Salina Ruiz, Roberta Mary Vidotti, and Francisco Abel Pompeu de Campos. "Controle litoestrutural e caracterização geofísica do Complexo Alcalino Planalto da Serra, Mato Grosso." Geologia USP. Série Científica 18, no. 4 (December 17, 2018): 73–87. http://dx.doi.org/10.11606/issn.2316-9095.v18-152318.
Full textMilhomem Neto, João Marinho, Afonso César Rodrigues Nogueira, and Moacir José Buenano Macambira. "A seção-tipo da Formação Serra do Quilombo, Grupo Araras, Neoproterozoico da Faixa Paraguai Norte, Mato Grosso." Brazilian Journal of Geology 43, no. 2 (June 1, 2013): 385–400. http://dx.doi.org/10.5327/z2317-48892013000200013.
Full textDissertations / Theses on the topic "Faixa Paraguai"
Figueiredo, Milene Freitas. "\"Quimioestratigrafia das rochas ediacarianas do extremo norte da faixa Paraguai, Mato Grosso\"." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/44/44141/tde-19032007-083041/.
Full textThis work presents a detailed isotopic (C, O, and Sr) chemostratigraphic study carried out on the Ediacaran carbonate succession from the northernmost part of the Paraguay Belt, in Mato Grosso, Brazil. The importance of this study is related to the Earth´s profound climate changes that took place during the Neoproterozoic, which have been recorded by enigmatic sequences composed of glacial deposits immediately overlain by carbonate rocks typical of warm climate. At least three glaciations are recognized: Sturtian (ca. 725 Ma), Marinoan (ca. 635 Ma), and Gaskiers (580 Ma). In order to correlate worldwide the successions deposited in this period and to understand the complex depositional environments, isotopic tools, especially chemostratigraphy, have been widely used. In the study area diamictites of the Puga Formation are overlain by carbonates of the Araras Group, and these, in turn, are covered by diamictites and carbonates of the Serra Azul Formation, which is defined here. The Araras Group carbonates exhibited d13C values between ? 1.7? at the base and + 4 ? at the top and 87Sr/86Sr ratios ranging from 0.7075 at the base to 0.7084 at the very top. These values are similar to those of post-glacial, non-cap Marinoan carbonate successions. The limestones of the Serra Azul Formation yielded d13C values between ? 7.5 and ? 3.2 ?, and 87Sr/86Sr ratios of ca. 0.7086, typical of post-Gaskiers cap carbonates. These isotopic results, together with sedimentological evidence, suggest that two important glaciations occurred during the depositional history of the northernmost Paraguay Belt.
Manzano, Jefferson Cassu. "Caracterização dos granitóides brasilianos da faixa de dobramentos Paraguai, MS e MT /." Rio Claro : [s.n.], 2009. http://hdl.handle.net/11449/92874.
Full textBanca: Antonio Zanardo
Banca: Ticiano José Saraiva dos Santos
Resumo: Esta qualificação traz os resultados de uma pesquisa realizada nos Estados do Mato Grosso e Mato Grosso do Sul, onde foram estudados e caracterizados quanto à composição mineralógica, comportamento geoquímico e idades isotópicas, sete corpos granitóides, intrusivos em rochas metassedimentares de baixo grau do Grupo Cuiabá. Estas rochas granitóides, conhecidas pelos nomes Taboco, Rio Negro, Coxim e Sonora no Estado do Mato Grosso do Sul e São Vicente, Lajinha e Araguaiana no Estado do Mato Grosso, representam um importante e pouco estudado capítulo na evolução geológica e tectônica do território brasileiro. Estes corpos representam um magmatismo sin a pós colisional, que ocorreu em dois eventos distintos, um ao redor de 500Ma e outro por volta de 540Ma. Geoquimicamente são caracterizados por uma tendência cálcio alcalina de alto potássio com caráter predominantemente peraluminoso. O quadro estrutural das rochas encaixantes mostra uma evolução polifásica, evidenciada pelo registro de três fases deformacionais, relacionadas à evolução da Faixa de Dobramentos Paraguai.
Abstract: This qualification brings the results of a research accomplished in Mato Grosso and Mato Grosso do Sul States, where they were studied and characterized as for the mineralogical composition, geochemical behavior and isotopic ages, seven bodies, intrusives in low grade meta sedimentary rocks of the Cuiabá Group. These granitic rocks, known by the names Taboco, Rio Negro, Coxim and Sonora in the Mato Grosso do Sul State and São Vicente, Lajinha and Araguaiana in the Mato Grosso State, represents an important however poor studied chapter in the geological and tectonic evolution of the Brazilian territory. These bodies represent a magmatism sin to pos colisionall, that happened in two different events, one around of 500Ma and other around 540Ma. Geochemically, are characterized predominantly by calcium alkaline of high potassium tendency with peraluminous character. The structural settings of the country rocks shows a polyphasic evolution, evidenced by the registration of three deformational phases, related to the evolution of Paraguai Folded Belt.
Mestre
Silva, Marcelo Ferreira da. "Aerogeofísica, litogeoquímica e geologia na caracterização do rifte intracontinental da faixa Paraguai." reponame:Repositório Institucional da UnB, 2007. http://repositorio.unb.br/handle/10482/2839.
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A integração de dados aerogeofísicos e de litogeoquímica permitem propor um modelo de evolução geotectônica considerando a abertura de um rifte intracontinental na Faixa Paraguai. A presença de rochas vulcânicas básicas e piroclásticas ácidas concentradas na região dos Araés, município de Nova Xavantina, sudeste do estado do Mato Grosso, sugerem o envolvimento de múltiplas fontes mantélicas na geração do magmatismo bimodal na área. A presença de uma pluma mantélica na base da crosta continental é requerida para explicar a assinatura geoquímica dos basaltos encontrados na região (continental flood basalts e tipo OIB), bem como, a tentativa de abertura e formação de crosta oceânica durante a evolução do rifte é sugerida pela presença de basaltos toleíticos com assinatura de MORB. O processamento dos dados dos temas aeromagnéticos de campo anômalo, amplitude do gradiente horizontal total, amplitude do sinal analítico e inclinação do sinal analítico auxiliaram na caracterização das feições estruturais da região e o delineamento dos corpos magnéticos, delimitando os limites do rifte, orientado na direção EW, e que posteriormente foram reativados formando extensas zonas de cisalhamento com indicadores cinemáticos dextrais. A identificação de uma estrutura anelar delimitando as rochas vulcânicas na região do Garimpo dos Araés sugere a presença de uma caldeira ignimbrítica formada no início da abertura do rifte e tem implicações metalogenéticas para a prospecção na região.
Manzano, Jefferson Cassu [UNESP]. "Caracterização dos granitóides brasilianos da faixa de dobramentos Paraguai, MS e MT." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/92874.
Full textConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Esta qualificação traz os resultados de uma pesquisa realizada nos Estados do Mato Grosso e Mato Grosso do Sul, onde foram estudados e caracterizados quanto à composição mineralógica, comportamento geoquímico e idades isotópicas, sete corpos granitóides, intrusivos em rochas metassedimentares de baixo grau do Grupo Cuiabá. Estas rochas granitóides, conhecidas pelos nomes Taboco, Rio Negro, Coxim e Sonora no Estado do Mato Grosso do Sul e São Vicente, Lajinha e Araguaiana no Estado do Mato Grosso, representam um importante e pouco estudado capítulo na evolução geológica e tectônica do território brasileiro. Estes corpos representam um magmatismo sin a pós colisional, que ocorreu em dois eventos distintos, um ao redor de 500Ma e outro por volta de 540Ma. Geoquimicamente são caracterizados por uma tendência cálcio alcalina de alto potássio com caráter predominantemente peraluminoso. O quadro estrutural das rochas encaixantes mostra uma evolução polifásica, evidenciada pelo registro de três fases deformacionais, relacionadas à evolução da Faixa de Dobramentos Paraguai.
This qualification brings the results of a research accomplished in Mato Grosso and Mato Grosso do Sul States, where they were studied and characterized as for the mineralogical composition, geochemical behavior and isotopic ages, seven bodies, intrusives in low grade meta sedimentary rocks of the Cuiabá Group. These granitic rocks, known by the names Taboco, Rio Negro, Coxim and Sonora in the Mato Grosso do Sul State and São Vicente, Lajinha and Araguaiana in the Mato Grosso State, represents an important however poor studied chapter in the geological and tectonic evolution of the Brazilian territory. These bodies represent a magmatism sin to pos colisionall, that happened in two different events, one around of 500Ma and other around 540Ma. Geochemically, are characterized predominantly by calcium alkaline of high potassium tendency with peraluminous character. The structural settings of the country rocks shows a polyphasic evolution, evidenced by the registration of three deformational phases, related to the evolution of Paraguai Folded Belt.
Sa, Fernanda Rostirola de. "Análise tectono-estratigráfica da Faixa de dobramento Paraguai meridional na Serra da Bodoquena e depressão do Rio Miranda, MS." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/44/44141/tde-19112009-102622/.
Full textThis work aims to characterize the geological and structural context of the Southern Paraguay Folded Belt, and to understand the stratigraphic relationships between the Puga Formation, Corumbá and Cuiabá groups. Regional geological reconnaissance work and detailed geological-structural field sections were carried out, with petrographic and structural analysis, together with integration of existing data and maps and analysis of satellite images, aerial photos and digital terrain models. The southern Paraguay Belt is a typical fold-andthrust belt. Its geological evolution began with rifting (Puga and Cerradinho formations), probably at the end of Criogenian, and evolved to restricted sea and passive margin (Bocaina, Tamengo and Guaicurus formations) in the late Ediacaran. It is proposed that the Cuiabá Group in the study area consists of distal marine deposits coeval with the Corumbá Group. The collisional process responsible for basin inversion and associated deformation and metamorphism occurred in the Cambrian, with post-collisional magmatism in the Upper Cambrian. The structural style becomes increasingly complex from west to east. Up to three overprinted coaxial folding phases are observed with north / south upright axial planes dipping to east and axes plunging gently to North or South. A system of thrust faults is associated with displacement of the hangwall to the west. Down-dip to oblique and strike-slip stretching lineations are also observed, with kinematic indicators showing movement varying from inverse to sinistral. This suggests that the collisional convergence toward the Rio Apa block which generated the mobile belt was not strictly frontal, but had some degree of obliquity, with convergence vectors around SSW - ENE. The Cuiabá Group mica-schists show the most complex structural style with three superimposed coaxial fold phases and more intense tectonic foliations. It is proposed that there would be time correlation between the S3 foliation in the mica-schists in the easternmost area, with the S2 foliation in the central area and the S1 cleavage at the limit of the cratonic area to the west. This pattern can be explained by the westward migration of the deformational front. It is suggestive that the main thrusts coincide with major basin boundaries, where greater variations in thickness and expression of the basal formations occur. During the basin inversion the thrusts probably reactivated the former main listric faults of the rift stage.
Figueiredo, Milene Freitas. "Quimioestratigrafia isotópica (C, O, S e Sr), geocronologia (Pb-Pb e K-Ar) e proveniência (Sm-Nd) das rochas da Faixa Paraguai Norte, Mato Grosso." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/44/44141/tde-23012011-172059/.
Full textExpressive biogeochemical anomalies have been recognized in Neoproterozoic marine rocks deposited worldwide, with no similar record throughout the Phanerozoic. The interest in this Era have been increased, especially on the Ediacaran time, the period that precedes the great CambrianLife Explosion, and houses the first macroscopic organisms, which are known as the Ediacaran Fauna. Thus, the understanding of paleoclimatic and paleoenvironmental conditions, associated with the establishment of the chronology of the events is crucial in the understanding the evolution of biota on the planet during this period. The rocks of northern Paraguay Belt in the study area record the occurrence of two glaciations, where one is Cryogenian and another is Ediacaran (Puga and Serra Azul formations). These glacial deposits are separated by a thick carbonate platform (Araras Group), which records biogeochemical anomalies in the Ediacaran seawater. These rocks were deposited in the southeastern margin of the Amazonian Craton, in the time interval between the breakup of the Rodinia Paleocontinent and the assemblage of the Gondwana. This work is composed by five articles, whose study scopes are: i) detailed isotope chemostratigraphy (C, O, S and Sr) in carbonates from the Araras Group and the Serra Azul Formation; ii) provenance (Sm-Nd) of the siliclastic rocks from the Puga and the Serra Azul Formations and the base of the Raizama Formation; and iii) geochronology (Pb-Pb in carbonate and K-Ar in volcanic clasts) from the Serra Azul Formation. The \'delta\'\'POT.13 C\' values showed two post-glacial negative anomalies (ca. - 6%o) and a gradient of up to 2.5%o along the basin, during interglacial period. The obtained \'ANTPOT.87 Sr\'/\'ANTPOT.86 Sr\' ratios (between 0.7074 and 0.7087) showed a consistent trend with that expected for the Ediacaran sea water. The trace sulfate extracted from obtained carbonates yielded \'delta\'\'POT.34 S\' values from 22 to 61%o, whereas the pyrites ranged between 11 and 43%o. These \'delta\'\'POT.34 S\' values are the heaviest ever recorded in geologic time (above 48 and 30, respectively). The Sm-Nd model ages (\'T IND.DM\') obtained from siliciclastic rocks from Puga, Serra Azul and Raizama formations range from 1.6 to 2.2 Ga, and indicate a variable contribution along the section, with predominant sources coming from areas at north and east of the precursor basin. Recovered volcanic clasts from the Serra Azul Formation yielded K-Ar ages between 730 and 1167 Ma, revealing a non expected young source for areas on the Amazon Craton. The Pb-Pb isochron age of 596 ± 26 Ma was determined in carbonates from the Serra Azul Formation and corroborates its correlation with Gaskiers Glaciation which was dated at 580 Ma.
Manzano, Jefferson Cassu. "Evolução do Terreno rio Apa e sua relação com a faixa de dobramentos Paraguai /." Rio Claro, 2013. http://hdl.handle.net/11449/103046.
Full textBanca: Antenor Zanardo
Banca: Marco Aurélio Farias de Oliveira
Banca: Romulo Machado
Banca: Ticiano José Saraiva dos Santos
Resumo: O Maciço do Rio Apa ocorre no sudoeste do estado de Mato Grosso do Sul e corresponde à porção meridional do Cráton Amazônico de idade dominantemente Paleoproterozóica. O Complexo Rio Apa, mais antigo, é constituído por ortognaisses migmatíticos, além de anfibolitos, tonalitos e granodioritos. O Grupo Alto Tererê é composto por xistos, biotita - muscovita gnaisses e quartzitos micáceos, comumente granatíferos, além de rochas metabásicas, em fácies anfibolito baixa. O Grupo Amonguijá é definido pela Suíte Intrusiva Alumiador que representa um batólito de composição sieno- a monzogranítica e pela Suíte Vulcânica Serra da Bocaina composta por rochas vulcanoclásticas de composição álcali - riólito a monzoriólitos e produtos piroclásticos. Sobreposta, a leste e a sul ocorrem as rochas metassedimentares Neoproterozóicas da Faixa de Dobramento Paraguai (grupos Cuiabá, Corumbá e Jacadigo-Formação Urucum). O quadro estrutural - metamórfico é identificado por 5 fases deformacionais, mas sua atual estruturação tectônica-metamórfica passa pelo arranjo tectônico superimposto da Faixa de Dobramentos Paraguai. As rochas do Complexo Rio Apa, Grupo Alto Tererê e Grupo Amonguijá registram uma evolução estrutural reliquiar antiga definida pelas fases (Dn-1 e Dn). As fases deformacionais (Dn+1 e Dn+2) encontram-se visíveis principalmente nas rochas da Faixa de Dobramento Paraguai, enquanto deformações (Dn+3) superimpõem a todas as sequências
Abstract: Geological and structural frame of the Rio Apa Massif, southeastern of the Amazonian Craton (MS), Brasil Rio Apa Massif crops out in the Mato Grosso do Sul state and corresponds to the southeastern portion of the Amazonian Craton dominantly Paleoproterozoic in age. Rio Apa Complex is oldest and it is composed mainly by migmatitic orthogneisses, beyond amphybolites, tonalities and granodiorite. Alto Tererê Group is composed by schists, biotite-muscovite gneisses and micaceous quartzites generally rich in garnets, beyond metabasic rocks of low amphibolite facies. The Amonguijá Group is constituted by Alumiador Intrusive Suite, which is represented by a sieno to monzogranitic batholith and Serra da Bocaina Volcanic Suite composed of volcanoclastic rocks of alkali riolites to monzoriolites compositions and pyroclastic products. Overlaying towards East and South occurs Neoproterozoic metasedimentary rocks from the Paraguai Folded Belt (Cuiabá, Corumbá and Jacadigo Groups-Urucum Formation). Structural-metamorphic framewok is identified by five deformational phases but the actual tectonic and metamorphic structure shows the superposed tectonic array of the Paraguai Folded Belt. Rocks from Rio Apa Complex, Alto Tererê Group and Amonguijá Group record an older structural evolution defined by (Dn-1 and Dn). The deformational phases (Dn+1 and Dn+2) are visible mainly in rocks of Paraguai Folded Belt beyond the last deformation (Dn+3) that imprints all sequences
Doutor
Manzano, Jefferson Cassu [UNESP]. "Evolução do Terreno rio Apa e sua relação com a faixa de dobramentos Paraguai." Universidade Estadual Paulista (UNESP), 2013. http://hdl.handle.net/11449/103046.
Full textO Maciço do Rio Apa ocorre no sudoeste do estado de Mato Grosso do Sul e corresponde à porção meridional do Cráton Amazônico de idade dominantemente Paleoproterozóica. O Complexo Rio Apa, mais antigo, é constituído por ortognaisses migmatíticos, além de anfibolitos, tonalitos e granodioritos. O Grupo Alto Tererê é composto por xistos, biotita - muscovita gnaisses e quartzitos micáceos, comumente granatíferos, além de rochas metabásicas, em fácies anfibolito baixa. O Grupo Amonguijá é definido pela Suíte Intrusiva Alumiador que representa um batólito de composição sieno- a monzogranítica e pela Suíte Vulcânica Serra da Bocaina composta por rochas vulcanoclásticas de composição álcali - riólito a monzoriólitos e produtos piroclásticos. Sobreposta, a leste e a sul ocorrem as rochas metassedimentares Neoproterozóicas da Faixa de Dobramento Paraguai (grupos Cuiabá, Corumbá e Jacadigo–Formação Urucum). O quadro estrutural - metamórfico é identificado por 5 fases deformacionais, mas sua atual estruturação tectônica-metamórfica passa pelo arranjo tectônico superimposto da Faixa de Dobramentos Paraguai. As rochas do Complexo Rio Apa, Grupo Alto Tererê e Grupo Amonguijá registram uma evolução estrutural reliquiar antiga definida pelas fases (Dn-1 e Dn). As fases deformacionais (Dn+1 e Dn+2) encontram-se visíveis principalmente nas rochas da Faixa de Dobramento Paraguai, enquanto deformações (Dn+3) superimpõem a todas as sequências
Geological and structural frame of the Rio Apa Massif, southeastern of the Amazonian Craton (MS), Brasil Rio Apa Massif crops out in the Mato Grosso do Sul state and corresponds to the southeastern portion of the Amazonian Craton dominantly Paleoproterozoic in age. Rio Apa Complex is oldest and it is composed mainly by migmatitic orthogneisses, beyond amphybolites, tonalities and granodiorite. Alto Tererê Group is composed by schists, biotite-muscovite gneisses and micaceous quartzites generally rich in garnets, beyond metabasic rocks of low amphibolite facies. The Amonguijá Group is constituted by Alumiador Intrusive Suite, which is represented by a sieno to monzogranitic batholith and Serra da Bocaina Volcanic Suite composed of volcanoclastic rocks of alkali riolites to monzoriolites compositions and pyroclastic products. Overlaying towards East and South occurs Neoproterozoic metasedimentary rocks from the Paraguai Folded Belt (Cuiabá, Corumbá and Jacadigo Groups-Urucum Formation). Structural-metamorphic framewok is identified by five deformational phases but the actual tectonic and metamorphic structure shows the superposed tectonic array of the Paraguai Folded Belt. Rocks from Rio Apa Complex, Alto Tererê Group and Amonguijá Group record an older structural evolution defined by (Dn-1 and Dn). The deformational phases (Dn+1 and Dn+2) are visible mainly in rocks of Paraguai Folded Belt beyond the last deformation (Dn+3) that imprints all sequences
SANTOS, Iara Maria dos. "Estratigrafia e tectônica da Faixa Paraguai Norte: implicações evolutivas neoproterozóicas no Sudeste do Cráton Amazônico." Universidade Federal do Pará, 2016. http://repositorio.ufpa.br/jspui/handle/2011/9344.
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A Faixa Paraguai Norte, localizada a SE do Cráton Amazônico foi estabelecida durante os estágios finais do Ciclo Brasiliano (940-620 Ma.) marcado por colisões entre os crátons Amazônico, São Francisco e Rio de La Plata para compor o Supercontinente Gondwana Oeste. Este segmento tectônico é formado por rochas metassedimentares do Grupo Cuiabá (720 Ma.), provenientes de bacias marinhas profundas em margens passivas no contexto extensional da fragmentação do Supercontinente Rodínia (1,0 Ga.). Estas bacias foram afetadas por inversão tectônica, devido aos esforços advindos da Orogenia Brasiliana, promovendo metamorfismo regional e deformação cujo nível crustal dúctil está hoje aflorante. Subsequentemente, este orógeno foi soerguido, exposto à erosão e submetido a eventos extensionais, embasando bacias intracratônicas que compreende as rochas sedimentares da Formação Puga (635 Ma.), Grupo Araras (627±32), Formação Raizama (645±15 Ma.) e Formação Diamantino (541±7 Ma.) de ambiente plataformal moderadamente profundo a raso, com influência de tempestades, ambiente transicional com influência de sedimentares são relacionadas a eventos de reativações transtensivas de estruturas antigas, e estão relacionadas à geração de dobras de arrasto e grábens pós-paleozóicos afetando as bacias sedimentares dos Parecis e do Paraná. Veios de quartzo tardios ocorrem encaixados somente em rochas do Grupo Cuiabá. Os dados apresentados indicam que as rochas da Faixa Paraguai Norte foram afetadas por no mínimo dois episódios tectônicos: o primeiro relacionado ao estabelecimento do Orógeno Brasiliano composto somente por rochas do Grupo Cuiabá metamorfizadas e deformadas; e o segundo ligado a reativações transtensivas, responsáveis pelo estabelecimento de bacias sedimentares fanerozóicas e deformação rúptil por dobras e falhas normais nas rochas sedimentares da Formação Puga, Grupo Araras, Formação Raizama e Formação Diamantino.
The Northern Paraguay Belt, located at Southeast of Amazonian Craton, was established during the final stages of Brasiliano Cycle (940-620 My.) marked by the collisions among Amazonian, San Francisco and Rio de La Plata cratons to assembly the Gondwana West Supercontinent. The Northern Paraguay Belt consists mainly of metasedimentary rocks of the Cuiabá Group (720 My.), assigned to passive margins basins in an extensional context during the break-up of Supercontinent Rodinia (1.0 Gy.). These basins were affected by tectonic inversion by Brasiliano Orogeny, causing regional metamorphism and ductile crustal level deformation. Subsequently, the orogen had been uplifted, exposed to erosion and subjected to extensional episodes, developing intracratonic basin where sedimentary rocks of the Puga Formation (635 My.), Araras Group (627 ± 32 My.), Raizama Formation (645 ± 15 My.) and Diamantino Formation (541 ± 7 Ma.) were unconformably deposited in moderately deep to shallow storm influenced plataformal environment, tidal affected transitional environment and, lacustrine deltaic environment, respectively. These rocks are classically assigned to a Foreland Basin, however, ancient suture zones usually exposes the orogen roots, and these basins are currently not well preserved. These intracratonic or plataformal basin sedimentary rocks show considerable thicknesses and outcrop in Northeast-Southwest aligned trending mountain ranges. The São Vicente Granite (518 My.) and the Tapirapuã Formation basalts (197 My.) occur as intrusive rocks in the studied area along the Northern Paraguay Belt. The geological contacts between the metasedimentary rocks of the Cuiabá Group with sedimentary rocks of Puga Formation, Araras Group and Alto Paraguay Group, is interpreted as non-conformity. The Cuiabá Group rocks (720 My.) are mainly composed by quartz, plagioclase, muscovite, biotite and phengite and correspondent to greenschist facies affecting a low grade pelitic protolith. These rocks were deformed by ductile shear zone trending Northeast-Southwest, with strain partitioning, described as Transpressional Structural Domain D1, which was divided into two deformation facies: (1) D1-A and (2) D1-B. (1) The D1-A features a fine continuous foliation and stretching mineral lineation, with a rake of 40º, moderately inclined to recumbent, “S” type asymmetrical flexural folds; ductile-brittle thrustfaults and late strike-slip dextral ductile-brittle shear bands; (2) The D1-B is marked by a mylonitic foliation, with its stretching mineral lineation, with a 15º rake. These deformational facies comprises a mainly transpressional sinistral flow mostly dominated by simple shear and influenced by the strain partitioning. All structures indicate tectonic vergence from Northwest toward Southeast, as a result of the collisional setting of the Brasiliano Orogeny (620 Ma.). The sedimentary rocks were deformed under brittle crustal level conditions. Consequently they show inclined to subvertical, asymmetric "Z" type drag folds indicating dextral movement, besides normal faults and cataclastic foliation. The drag folds in the sedimentary rocks indicate tectonic vergence toward both Southeast and Southwest, therefore they were not generated under directed tectonic effort. Normal faults which deform sedimentary rocks are related to later transtensional reactivation episodes of ancient structures forming drag folds and Post-Paleozoic grabens affecting both the Parecis and Parana sedimentary basins. Late quartz veins occur emplaced only in the Cuiabá Group rocks. In conclusion, the Northern Paraguay Belt rocks were affected for at least two main tectonic episodes: (1) The Brasiliano Orogeny, only represented by Cuiabá Group rocks which show metamorphism and ductile deformation; (2) and transtensional reactivation that had been responsible for the establishment of the sedimentary basins followed by brittle deformation of Puga Formation, Araras Group, Raizama and Diamantino Formation.
Zaine, Mariselma Ferreira. "Análise de fósseis de parte da faixa Paraguai (ms,mt) e seu contexto temporal e paleoambiental." Universidade de São Paulo, 1991. http://www.teses.usp.br/teses/disponiveis/44/44136/tde-31032015-110745/.
Full textThis dissertation describles fossils and their temporal and paleoenvironmental contexts from the Jacadigo and Corumbá Groups and Araras and Raizama Formations of the Paraguai Belt in the regions of Corumbá and Bonito/serra da Bodoquena, Mato Grosso do Sul, Cáceres and Bauxi/Jangada in Mato Grosso, in Central-Western Brazil. The paleontologic record of these sequences is of great importance for a better understanding of the Proterozoic Cambrian transition in Brazil. The fossils studied include metazoans, metaphytes, organic-walled microfossils, ichnofossils and stromatolites, all of rather limited occurrence. Within the Jacadigo Group, vase-shaped microfossils apparently restrict the age of the carbonate clasts in which they occur to the interval between 700 and 950 Ma. Greater paleontological diversity is displayed by the overlyng Corumbá Group in the form of metazoans (Cloudina Lucianoi and Corumbella werneri), metaphytes (tyrasotaenia sp.) and microfossils (Sphaerocongregus variabilis), that together point to a latest Vendian age at least for the uppermost part of this sedimentary sequence. In the Araras Formation, a lateral equivalent of the Corumbá Group, stromatolites provide no significant indication of age but are of considerable paleoenvironmental interest and may be useful in local correlation. Above the Araras Formation, in the Raizama Formation, simple, horizontal ichnofossils are here registered for the first time in the Paraguai Belt and are forms known elsewhere from the end of the Proterozoic although not necessarily restricted to this eon. Isotopic analyses of the stable isotopes of C in limestone of the Corumbá Group and Araras Formation furnished \'delta\'\'ANTPOT.18 C\' values consistent with those exhibited by other terminal Vendian sequences in the world, they also complement paleoenvironmental studies, together with evidence derived from study of lithologies, sedimentary structures and a few analyses of \'delta\'\'ANTPOT.18 O\'. Isotopic compositions of Sr for many of the same samples analysed for C and O fall within the general range of values known for the Late Proterozoic, in conjunction with the associated fossil evidence, however, they appear to be consistent with a more restricted interval at the end of this eon.
Conference papers on the topic "Faixa Paraguai"
Silva, Marcelo Ferreira da, Marcus Flavio Nogueira Chiarini, Elton Luiz Dantas, and Roberto Alexandre Vitória de Moraes. "Aeromagnetometria na Caracterização do rifte intracontinental na Faixa Paraguai." In 12th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 15-18 August 2011. Society of Exploration Geophysicists and Brazilian Geophysical Society, 2011. http://dx.doi.org/10.1190/sbgf2011-145.
Full textVieira, J. A. C., R. C. Dantas, and G. S. França. "Installation Of A Broadband Seismological Station In The Faixa Paraguai." In 12th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 15-18 August 2011. Society of Exploration Geophysicists and Brazilian Geophysical Society, 2011. http://dx.doi.org/10.1190/sbgf2011-400.
Full textS. Bologna, Mauricio, Antonio L. Padilha, Ícaro Vitorello, and Marcelo B. Pádua. "Sondagens magnetotelúricas de longo período na Faixa Paraguai, Brasil Central: uma análise preliminar." In 8th International Congress of the Brazilian Geophysical Society. European Association of Geoscientists & Engineers, 2003. http://dx.doi.org/10.3997/2214-4609-pdb.168.arq_631.
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