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Universidade Estadual De Campinas Instituto De Geociências Pós-Graduação Em Geociências Na Àrea De Geologia E Recursos Naturais UNIVERSIDADE ESTADUAL DE CAMPINAS INSTITUTO DE GEOCIÊNCIAS PAVEL EMIL CAÑABI QUISPE GEOLOGIA, GEOQUÍMICA E GEOCRONOLOGIA DOS GRANITOIDES FOLIADOS E ROCHAS SUBVULCÂNICAS DA REGIÃO DE PEIXOTO DE AZEVEDO SETOR LESTE DA PROVÍNCIA AURÍFERA DE ALTA FLORESTA, MATO GROSSO CAMPINAS 2016 PAVEL EMIL CAÑABI QUISPE GEOLOGIA, GEOQUÍMICA E GEOCRONOLOGIA DOS GRANITOIDES FOLIADOS E ROCHAS SUBVULCÂNICAS DA REGIÃO DE PEIXOTO DE AZEVEDO SETOR LESTE DA PROVÍNCIA AURÍFERA DE ALTA FLORESTA, MATO GROSSO DISSERTAÇÃO APRESENTADA AO INSTITUTO DE GEOCIÊNCIAS DA UNIVERSIDADE ESTADUAL DE CAMPINAS PARA OBTENÇÃO DO TÍTULO DE MESTRE EM GEOCIÊNCIAS NA ÁREA DE GEOLOGIA E RECURSOS NATURAIS ORIENTADORA/SUPERVISOR: DRA. MARIA JOSÉ MESQUITA ESTE EXEMPLAR CORRESPONDE À VERSÃO FINAL DA DISSERTAÇÃO DEFENDIDA PELO ALUNO PAVEL EMIL CAÑABI QUISPE E ORIENTADA PELA PROFA. DRA. MARIA JOSÉ MESQUITA CAMPINAS 2016 Agência(s) de fomento e nº(s) de processo(s): CNPq, 132501/2014-7 Ficha catalográfica Universidade Estadual de Campinas Biblioteca do Instituto de Geociências Cássia Raquel da Silva - CRB 8/5752 Quispe, Pavel Emil Canabi, 1985- Q48g QuiGeologia, geoquímica e geocronologia dos granitoides foliados e rochas subvolcânicas da região de Peixoto de Azevedo Setor Leste da Província Aurífera de Alta Floresta, Mato Grosso / Pavel Emil Canabi Quispe. – Campinas, SP : [s.n.], 2016. QuiOrientador: Maria José Maluf de Mesquita. QuiDissertação (mestrado) – Universidade Estadual de Campinas, Instituto de Geociências. Qui1. Outo - Minas e mineração - Alta Floresta (MT). 2. Crátons - Amazonia. 3. Magmatismo. 4. Cisalhamento. 5. Geocronologia. 6. Peixoto de Azevedo (MT). I. Mesquita, Maria José,1961-. II. Universidade Estadual de Campinas. Instituto de Geociências. III. Título. Informações para Biblioteca Digital Título em outro idioma: Geology, geochemistry, geochronology of foliated granitoids and subvolcanic rocks of Peixoto de Azevedo region, Alta Floresta Gold Province, Mato Grosso Palavras-chave em inglês: Gold - Mines and mining - Alta Floresta (MT) Craton - Amazon Magmatism Shear Geochronology Peixoto de Azevedo (MT) Área de concentração: Geologia e Recursos Naturais Titulação: Mestre em Geociências Banca examinadora: Maria José Maluf de Mesquita [Orientador] Roberto Perez Xavier Caetano Juliani Data de defesa: 25-08-2016 Programa de Pós-Graduação: Geociências Powered by TCPDF (www.tcpdf.org) UNIVERSIDADE ESTADUAL DE CAMPINAS INSTITUTO DE GEOCIÊNCIAS PÓS-GRADUAÇÃO EM GEOCIÊNCIAS NA ÀREA DE GEOLOGIA E RECURSOS NATURAIS AUTOR: Pavel Emil Cañabi Quispe “Geologia, Geoquímica e Geocronologia dos Granitoides Foliados e Rochas Subvulcânicas da Região de Peixoto de Azevedo Setor Leste da Província Aurífera de Alta Floresta, Mato Grosso ORIENTADORA: Profa. Dra. Maria José Maluf de Mesquita Aprovado em: 25 / 08 / 2016 EXAMINADORES: Profa. Dra. Maria José Maluf de Mesquita Prof. Dr. Roberto Perez Xavier Prof. Dr. Caetano Juliani A Ata de Defesa assinada pelos membros da Comissão Examinadora, consta no processo de vida acadêmica do aluno. Campinas, 28 de agosto de 2016. SÚMULA/BIOGRAFIA Geólogo graduado pela Universidade Nacional de Engenharia, Lima-Perú, trabalhou por três anos em diversas empresas de exploração mineral. Tem se desenvolvido nas áreas de geologia estrutural de regiões cisalhadas, granitóides e amostragem de controle de qualidade. Atualmente, está desenvolvendo mestrado no Instituto de Geociências da Universidade de Campinas State- IG / UNICAMP-Brasil. Ele é parte de um grupo de pesquisa.Referências bibliográficas: MESQUITA, M. J.; TREVISAN, V. G.; TEIXEIRA, R. V.; ASSIS, R. R.; XAVIER, R. P.; QUISPE, P.; MORETTI, M. R.; SCHMIDT, V. AGNOLETTO, A.; PAES DE BARROS, A. J.; MIGUEL-JÚNIOR, E. 2015. Ductile shear zone-hosted gold deposits in the Paleoproterozoic Alta Floresta Province (Brazil). 13th Biennial Metting, SGA, Nancy. Pg 141-144. FREITAS, K. F; PIMENTA V.A.; MESQUITA, M. J.; GOMES, M. B.; TEIXEIRA, R. V.; QUISPE, P. 2016. ANÁLISE DE MICROESTRUTURAS EM ROCHAS DE CISALHAMENTO DO DEPÓSITO PETECA, SETOR LESTE DA PROVÍNCIA AURÍFERA DE ALTA FLORESTA, MT. IN: PONTES, A. J. R.; LEITE, E. R. V. GEOLOGIA DAS SERRAS GAÚCHAS E ENTORNOS. IN: CONGRESSO BRASILEIRO DE GEOLOGIA, 48, 2016, PORTO ALEGRE - RS. ANAIS... SÃO PAULO - SP: SOCIEDADE BRASILEIRA DE GEOLOGIA, 2016. < HTTP://SBGEO.ORG.BR >. 23/10/2016. TEIXEIRA, R. V; MORETI, M.; QUISPE, P.; MESQUITA, M. J.; MATOS, J. H.; XAVIER, R. P.; PAES DE BARROS, A. J.; ASSIS, R. R.; TREVISAN, V. G.; MIGUEL-JÚNIOR, E.; AGNOLETTO, A. 2016. CONTROLE ESTRUTURAL DA MINERALIZAÇÃO AURÍFERA DO DEPÓSITO TIPO VEIO PETECA, PROVÍNCIA AURÍFERA DE ALTA FLORESTA NA REGIÃO DE FLOR DA SERRA, MT. IN: PONTES, A. J. R.; LEITE, E. R. V. GEOLOGIA DAS SERRAS GAÚCHAS E ENTORNOS. IN: CONGRESSO BRASILEIRO DE GEOLOGIA, 48, 2016, PORTO ALEGRE - RS. ANAIS... SÃO PAULO - SP: SOCIEDADE BRASILEIRA DE GEOLOGIA, 2016. < HTTP://SBGEO.ORG.BR >. 23/10/2016. AGRADECIMENTO Eu gostaria de agradecer a minha mãe (Rosa Quispe) e meus irmãos (Joseph, Luis, Deysi, Frederick, Rosalyn e Andrea) pelo apoio e carinho, a Dr. Maria José Mesquita pela orientação, tolerância e hospitalidade, a Vanessa Pimenta pela ajuda útil com a revisão do Inglês, a Companhia Mato-Grossense de Mineração-METAMAT e a Companhia Biogold pela ajuda com a coleta de dados e logística no campo e ao professor Dr. Mauro Geraldes da Universidade estadual do Rio de Janeiro pela datação geocronológica. Eu estou muito agradecido com o Instituto de Geociências da Universidade Estadual de Campinas-IG / UNICAMP pelo apoio constante, ao CNPq pelo apoio financeiro, número: 132501 / 2014-7. A meu filho (Joaquin Cañabi), estendo o meu agradecimento especial por me ensinar o amor incondicional, para ser feliz, ter esperança e não me render das adversidades da vida. Há homens que lutam um dia e são bons, há outros que lutam um ano e são melhores, há os que lutam muitos anos e são muito bons. Mas há os que lutam toda a vida e estes são imprescindíveis. ” Bertolt Brecht RESUMO A Província Aurífera Alta Floresta está inserida na porção sul do Cráton Amazonas, no limite entre as províncias geotectônicas Venturai-Tapajós (1.95-1.80 Ga) e Rio Negro-Juruena (1.8-1.55 Ga). A maioria dos depósitos auríferos primários e secundários está concentrada no segmento leste da Província Aurífera Alta Floresta, principalmente na região de Peixoto de Azevedo, foco desta pesquisa. No entanto, embora seja uma área economicamente importante, a região possui um contexto geológico e tectônico com escassez de dados. Mapeamento em escala 100 000 e dados petrográficos, geoquímicos e geocronológicos evidenciam o seguinte ambiente geológico: (a) o Hornblenda quartzo- diorito, o Biotita tonalito e granodiorito e dacito Naiuram, o apresentam altos teores de CaO e Al2O5, com afinidade metaluminosa a peraluminosa, magnesiana, e fazem parte da série magmática cálcio- alcalina médio a alto-K, formados provavelmente em arcos magmáticos. A o dacito Naiuram têm idade de cristalização magmática de 2012 ± 13 Ma (U-Pb em zircão) e o Hornblenda quartzo-diorito idade de 1981.2 ± 8.1 Ma; (b) o granada-muscovita Leucogranito Braço Norte apresenta alto teor de sílica, com afinidade peraluminosa, magnesiana, e é considerado parte da associação leucocrática peraluminosa. A idade de cristalização magmática é 2006 4.7 Ma, onde altos teores de Rb e baixo de Nb e Y sugerem granitos de fusão crustais; (c) os granitoides Gringo e Cruzeiro exibem afinidade peraluminosa, com trend magnesiano a ferroso. O baixo teor de CaO e Al2O5, especialmente nos granitos Cruzeiro, sugere que estes granitóides não fazem parte da série magmática cálcio-alcalina, e podem fazer parte da série magmática toleítica de alto K, descrita para magmatismo pós-colisional. A foliação e microestruturas de alta T podem indicar deformação subsolidus, com caráter sin-tectônico ao sistema de zonas de cisalhamento transcorrente Peru-Trairão; e (d) as rochas vulcânicas e subvulcânicas Batistão (Quartzo feldspato pórfiro e Microesferulito maciço riolito) exibem afinidade peraluminosa, ferrosa e fazem parte das rochas tipo A, conforme o alto teor de HFSE e FeOt / (FeOt + MgO) ~ 0.9, provavelmente relacionadas a ambientes pós-colisionais a intraplaca. No sistema de zonas de cisalhamento Peru-Trairão, quatro zonas de cisalhamento de primeira ordem NW-SE, transcorrentes, dúctil a rúptil-dúctil, foram reconhecidas e denominadas de Joaquim, Paraíba, Peteca e Serrinha. Estas afetam principalmente os granitóides, dioritos e quartzo-dacitos, foliados, desenvolvendo milonitos e filonitos. Os dados obtidos sugerem que a região de Peixoto de Azevedo é parte da província Tapajós-Parima, onde Hornblenda quartzo-diorito, Biotita tonalito e as rochas Naiuram podem estar relacionados ao arco magmático Cuiú Cuiú (2001-1986 Ma); o granada- muscovita Leucogranito Braço Norte pode estar provavelmente relacionado à leucogranitos e interpretado como parte de um evento collisional do arco magmático Cuiú Cuiú. Os granitoides Gringo e especificamente Cruzeiro podem estar relacionados ao arco Creporizão (1980-1957 Ma) e provavelmente se alojaram no sistema de cisalhamento Peru-Trairão rm ambiente pós-colisional. Este novo contexto geológico leva a uma melhor compreensão da região de Peixoto de Azevedo, contribui para aprimorar as relações geotectônicas entre as províncias auríferas de Alta Floresta e Tapajós e consequentemente aprimorar novas estratégias de exploração na área. Palavras-chaves: Província Aurífera Alta Floresta, Cráton Amazonas, região Peixoto de Azevedo, magmatismo Paleoproterozóico, Zonas de cisalhamento. ABSTRACT Alta
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