Contexto geológico e história deformacional do granito Indiavaí - SW do Cráton Amazônico
Autor(a) principal: | |
---|---|
Data de Publicação: | 2016 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFMT |
Texto Completo: | http://ri.ufmt.br/handle/1/2312 |
Resumo: | The Indiavaí Granite is located north of the city of Indiavaí in the southwestern state of Mato Grosso. It presents irregular shape with batholiths dimensions and is characterized in that the sienogranitics and subordinately monzogranitic composition, medium to coarse grain size, equigranular to porfiritic inequigranular texture and in some casesrapakivi texture. It presente index colorleucocratic, essentially consists of quartz, alkali feldspar, plagioclase, having as amphibole and biotite mafic minerals. Based on grain size difference were distinguished two facies of this body: Medium-grained facies and Coarse- grained facies. The coarse-grained facies has the same characteristics of medium- grained facies, differentiating the grain size of essential minerals that can reach 1,0 cm the highest percentage of mafic minerals that can reach 20% hornblende and 10% biotite. From the geological mapping was established that Indiavaí granite presente intrusive character on the Alto Jauru Group rocks and it is in temporal unconformity with the Jauru Formation rock s. Three deformation phases were identified that affect this granitic body, two of ductile behavior ando ne of brittle behavior. The first phase (D1) is represented by penetrative foliation classified as schistosity (S1) and shear zones of ductile - brittle character. The second phase (D2) is characterized by a crenulation cleavage with folds tight and the third phase (D3) is represented by a series of fractures and quartz veins. The Rica and Cristo Rei shear zones are characterized by irregular thickness band that vary of tens of hundreds of meters mark ed by rocks mylonitic series: protomylonite, mylonite e ultramylonite. Both have a peculiarity the “xistonite” that are very simple paragenesis rocks, composed essentially of quartz and phyllosilicates (muscovite), from granite deformation. The principal tool used, to do the characterization of these shearzones, was the petrographic analysis, microstructural features analysis and britlle and ductile textures analysis preserved in minerals together with kinematics indicators analysis. Based these factors, it was estimated that the deformation and metamorphic temperature was between 400°C ~600°C, vary between green schist facies and amphibolite facies, witch normal k inematic moviment, where all the deformed rocks from the same protolith, the Indiavaí Granite. |
id |
UFMT_1f31ebebc09a426581933d3a17c07398 |
---|---|
oai_identifier_str |
oai:localhost:1/2312 |
network_acronym_str |
UFMT |
network_name_str |
Repositório Institucional da UFMT |
repository_id_str |
|
spelling |
Contexto geológico e história deformacional do granito Indiavaí - SW do Cráton AmazônicoGranito IndiavaíZonas de cisalhamentoMilonitoCNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIASIndiavaí GraniteShear zonesMyloniteThe Indiavaí Granite is located north of the city of Indiavaí in the southwestern state of Mato Grosso. It presents irregular shape with batholiths dimensions and is characterized in that the sienogranitics and subordinately monzogranitic composition, medium to coarse grain size, equigranular to porfiritic inequigranular texture and in some casesrapakivi texture. It presente index colorleucocratic, essentially consists of quartz, alkali feldspar, plagioclase, having as amphibole and biotite mafic minerals. Based on grain size difference were distinguished two facies of this body: Medium-grained facies and Coarse- grained facies. The coarse-grained facies has the same characteristics of medium- grained facies, differentiating the grain size of essential minerals that can reach 1,0 cm the highest percentage of mafic minerals that can reach 20% hornblende and 10% biotite. From the geological mapping was established that Indiavaí granite presente intrusive character on the Alto Jauru Group rocks and it is in temporal unconformity with the Jauru Formation rock s. Three deformation phases were identified that affect this granitic body, two of ductile behavior ando ne of brittle behavior. The first phase (D1) is represented by penetrative foliation classified as schistosity (S1) and shear zones of ductile - brittle character. The second phase (D2) is characterized by a crenulation cleavage with folds tight and the third phase (D3) is represented by a series of fractures and quartz veins. The Rica and Cristo Rei shear zones are characterized by irregular thickness band that vary of tens of hundreds of meters mark ed by rocks mylonitic series: protomylonite, mylonite e ultramylonite. Both have a peculiarity the “xistonite” that are very simple paragenesis rocks, composed essentially of quartz and phyllosilicates (muscovite), from granite deformation. The principal tool used, to do the characterization of these shearzones, was the petrographic analysis, microstructural features analysis and britlle and ductile textures analysis preserved in minerals together with kinematics indicators analysis. Based these factors, it was estimated that the deformation and metamorphic temperature was between 400°C ~600°C, vary between green schist facies and amphibolite facies, witch normal k inematic moviment, where all the deformed rocks from the same protolith, the Indiavaí Granite.CAPESO granito Indiavaí está localizado a norte da cidade de Indiavaí no sudoeste do estado de Mato Grosso. Apresenta forma irregular com dimensões batolíticas e é caracterizado por ser de composição sienogranítica e subordinadamente monzogranítica, granulação média a grossa, textura equigranular a inequigranular porfirítica e em alguns casos textura rapakivi. Apresenta índice de cor leucocrático, constituído essencialmente por quartzo, feldspato alcalino, plagioclásio, tendo como minerais máficos anfibólio e biotita. Com base na diferença de granulação foram distinguidas duas fácies deste corpo: uma fácies grossa e outra média. A fácies grossa apresenta as mesmas características da fácies média, diferenciando-se pela granulação dos minerais essenciais que podem atingir até 1,0 cm e pelo maior percentual de minerais máficos, que podem atingir 20% hornblenda e 10% biotita. A partir do mapeamento geológico foi possível constatar que o granito Indiavaí apresenta caráter intrusivo nas rochas do Grupo Alto Jauru e está em discordância temporal com as rochas da Formação Jauru. Foram identificadas três fases de deformação que afetam este corpo granítico, sendo duas dúcteis e uma rúptil. A primeira fase (D1) é representada por foliação penetrativa classificada como xistosidade (S1) e por zonas de cisalhamento de caráter dúctil-rúptil. A segunda fase (D2) é caracterizada por uma clivagem de crenulação com dobras apertadas e a terceira fase (D3) é representada por um conjunto de fraturas e veios de quartzo. As zonas de cisalhamento Água Rica e Cristo Rei são caracterizadas por faixas de espessuras irregular que variam de dezenas a centenas de metros, marcada por rochas da série milonítica: protomilonito, milonito e ultramilonito. Ambas apresentam uma peculiaridade os “xistonitos” que são rochas de paragênese muito simples, compostas essencialmente por quartzo e filossilicatos (muscovita), provenientes da deformação do granito. A principal ferramenta utilizada para fazer a caracterização destas zonas de cisalhamento foram: as análises petrográficas, análise das feições microestruturais e texturais rúpteis - dúcteis preservadas nos minerais, juntamente com as análises dos indicadores cinemáticos. Baseado nestes parâmetros, estimou-se que a temperatura de deformação e metamorfismo se deu entre 400° ~ 600°C, variando entre a fácies xisto verde e fácies anfibolito, com movimentação cinemática normal, onde todas as rochas deformadas são provenientes do mesmo protólito, o Granito Indiavaí.Universidade Federal de Mato GrossoBrasilInstituto de Ciências Exatas e da Terra (ICET)UFMT CUC - CuiabáPrograma de Pós-Graduação em GeociênciasSilva, Carlos Humberto daCosta, Ana Cláudia Dantas dahttp://lattes.cnpq.br/6746400631352375http://lattes.cnpq.br/2261189822798494Silva, Carlos Humberto da778.291.581-34http://lattes.cnpq.br/2261189822798494Costa, Paulo César Corrêa da514.461.201-63http://lattes.cnpq.br/2393172094941277778.291.581-34791.103.545-15Simões, Luiz Sérgio Amarante391.471.857-91http://lattes.cnpq.br/8494978763134595Silva, Danielle Cristine da2021-01-28T17:33:08Z2017-02-142021-01-28T17:33:08Z2016-09-28info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisSILVA, Danielle Cristine da. Contexto geológico e história deformacional do granito Indiavaí - SW do Cráton Amazônico. 2016. 63 f. Dissertação (Mestrado em Geociências) - Universidade Federal de Mato Grosso, Instituto de Ciências Exatas e da Terra, Cuiabá, 2016.http://ri.ufmt.br/handle/1/2312porinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFMTinstname:Universidade Federal de Mato Grosso (UFMT)instacron:UFMT2021-01-31T06:04:16Zoai:localhost:1/2312Repositório InstitucionalPUBhttp://ri.ufmt.br/oai/requestjordanbiblio@gmail.comopendoar:2021-01-31T06:04:16Repositório Institucional da UFMT - Universidade Federal de Mato Grosso (UFMT)false |
dc.title.none.fl_str_mv |
Contexto geológico e história deformacional do granito Indiavaí - SW do Cráton Amazônico |
title |
Contexto geológico e história deformacional do granito Indiavaí - SW do Cráton Amazônico |
spellingShingle |
Contexto geológico e história deformacional do granito Indiavaí - SW do Cráton Amazônico Silva, Danielle Cristine da Granito Indiavaí Zonas de cisalhamento Milonito CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS Indiavaí Granite Shear zones Mylonite |
title_short |
Contexto geológico e história deformacional do granito Indiavaí - SW do Cráton Amazônico |
title_full |
Contexto geológico e história deformacional do granito Indiavaí - SW do Cráton Amazônico |
title_fullStr |
Contexto geológico e história deformacional do granito Indiavaí - SW do Cráton Amazônico |
title_full_unstemmed |
Contexto geológico e história deformacional do granito Indiavaí - SW do Cráton Amazônico |
title_sort |
Contexto geológico e história deformacional do granito Indiavaí - SW do Cráton Amazônico |
author |
Silva, Danielle Cristine da |
author_facet |
Silva, Danielle Cristine da |
author_role |
author |
dc.contributor.none.fl_str_mv |
Silva, Carlos Humberto da Costa, Ana Cláudia Dantas da http://lattes.cnpq.br/6746400631352375 http://lattes.cnpq.br/2261189822798494 Silva, Carlos Humberto da 778.291.581-34 http://lattes.cnpq.br/2261189822798494 Costa, Paulo César Corrêa da 514.461.201-63 http://lattes.cnpq.br/2393172094941277 778.291.581-34 791.103.545-15 Simões, Luiz Sérgio Amarante 391.471.857-91 http://lattes.cnpq.br/8494978763134595 |
dc.contributor.author.fl_str_mv |
Silva, Danielle Cristine da |
dc.subject.por.fl_str_mv |
Granito Indiavaí Zonas de cisalhamento Milonito CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS Indiavaí Granite Shear zones Mylonite |
topic |
Granito Indiavaí Zonas de cisalhamento Milonito CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS Indiavaí Granite Shear zones Mylonite |
description |
The Indiavaí Granite is located north of the city of Indiavaí in the southwestern state of Mato Grosso. It presents irregular shape with batholiths dimensions and is characterized in that the sienogranitics and subordinately monzogranitic composition, medium to coarse grain size, equigranular to porfiritic inequigranular texture and in some casesrapakivi texture. It presente index colorleucocratic, essentially consists of quartz, alkali feldspar, plagioclase, having as amphibole and biotite mafic minerals. Based on grain size difference were distinguished two facies of this body: Medium-grained facies and Coarse- grained facies. The coarse-grained facies has the same characteristics of medium- grained facies, differentiating the grain size of essential minerals that can reach 1,0 cm the highest percentage of mafic minerals that can reach 20% hornblende and 10% biotite. From the geological mapping was established that Indiavaí granite presente intrusive character on the Alto Jauru Group rocks and it is in temporal unconformity with the Jauru Formation rock s. Three deformation phases were identified that affect this granitic body, two of ductile behavior ando ne of brittle behavior. The first phase (D1) is represented by penetrative foliation classified as schistosity (S1) and shear zones of ductile - brittle character. The second phase (D2) is characterized by a crenulation cleavage with folds tight and the third phase (D3) is represented by a series of fractures and quartz veins. The Rica and Cristo Rei shear zones are characterized by irregular thickness band that vary of tens of hundreds of meters mark ed by rocks mylonitic series: protomylonite, mylonite e ultramylonite. Both have a peculiarity the “xistonite” that are very simple paragenesis rocks, composed essentially of quartz and phyllosilicates (muscovite), from granite deformation. The principal tool used, to do the characterization of these shearzones, was the petrographic analysis, microstructural features analysis and britlle and ductile textures analysis preserved in minerals together with kinematics indicators analysis. Based these factors, it was estimated that the deformation and metamorphic temperature was between 400°C ~600°C, vary between green schist facies and amphibolite facies, witch normal k inematic moviment, where all the deformed rocks from the same protolith, the Indiavaí Granite. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-09-28 2017-02-14 2021-01-28T17:33:08Z 2021-01-28T17:33:08Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
SILVA, Danielle Cristine da. Contexto geológico e história deformacional do granito Indiavaí - SW do Cráton Amazônico. 2016. 63 f. Dissertação (Mestrado em Geociências) - Universidade Federal de Mato Grosso, Instituto de Ciências Exatas e da Terra, Cuiabá, 2016. http://ri.ufmt.br/handle/1/2312 |
identifier_str_mv |
SILVA, Danielle Cristine da. Contexto geológico e história deformacional do granito Indiavaí - SW do Cráton Amazônico. 2016. 63 f. Dissertação (Mestrado em Geociências) - Universidade Federal de Mato Grosso, Instituto de Ciências Exatas e da Terra, Cuiabá, 2016. |
url |
http://ri.ufmt.br/handle/1/2312 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de Mato Grosso Brasil Instituto de Ciências Exatas e da Terra (ICET) UFMT CUC - Cuiabá Programa de Pós-Graduação em Geociências |
publisher.none.fl_str_mv |
Universidade Federal de Mato Grosso Brasil Instituto de Ciências Exatas e da Terra (ICET) UFMT CUC - Cuiabá Programa de Pós-Graduação em Geociências |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFMT instname:Universidade Federal de Mato Grosso (UFMT) instacron:UFMT |
instname_str |
Universidade Federal de Mato Grosso (UFMT) |
instacron_str |
UFMT |
institution |
UFMT |
reponame_str |
Repositório Institucional da UFMT |
collection |
Repositório Institucional da UFMT |
repository.name.fl_str_mv |
Repositório Institucional da UFMT - Universidade Federal de Mato Grosso (UFMT) |
repository.mail.fl_str_mv |
jordanbiblio@gmail.com |
_version_ |
1804648505150537728 |