Cerro Porã Batholith: post-orogenic A-type granite from the Amoguijá Magmatic Arc - Rio ApaTerrane - South of the Amazonian Craton
The Cerro Porã Batholith has an approximately area of 30 km by 4 km, situated at the region of Porto Murtinho, Mato Grosso do Sul. It is located in Rio Apa Terrane, at the southern portion of the Amazonian Craton. It consists of Pink Syenogranitic Facies and Gray Monzogranitic Facies. The first faci...
| Autor principal: | PLENS, Dalila Pexe |
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| Outros Autores: | RUIZ, Amarildo Salina, SOUSA, Maria Zélia Aguiar de, BATATA, Maria Elisa Fróes, LAFON, Jean Michel, BRITTES, Ana Flávia Nunes |
| Grau: | Artigo |
| Idioma: | eng |
| Publicado em: |
2015
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| Acesso em linha: |
http://repositorio.ufpa.br/jspui/handle/2011/6414 |
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ir-2011-6414 |
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ir-2011-64142018-01-16T17:38:35Z Cerro Porã Batholith: post-orogenic A-type granite from the Amoguijá Magmatic Arc - Rio ApaTerrane - South of the Amazonian Craton Batólito Cerro Porã: granito tipo-A pós-orogênico do arco magmático Amoguijá – terreno Rio Apa – sul do Cráton Amazônico PLENS, Dalila Pexe RUIZ, Amarildo Salina SOUSA, Maria Zélia Aguiar de BATATA, Maria Elisa Fróes LAFON, Jean Michel BRITTES, Ana Flávia Nunes Geoquímica Geocronologia Granito Cerro Porã Granito Tipo A Cráton Amazônico Porto Murtinho - MS Mato Grosso do Sul - Estado The Cerro Porã Batholith has an approximately area of 30 km by 4 km, situated at the region of Porto Murtinho, Mato Grosso do Sul. It is located in Rio Apa Terrane, at the southern portion of the Amazonian Craton. It consists of Pink Syenogranitic Facies and Gray Monzogranitic Facies. The first facies is characterized by xenomorphic equigranular texture to essentially inequigranular texture with graphic and granophiric intergrowths. Both facies are composed of alkali feldspar, quartz, and plagioclase with biotite as the only primary mafic mineral. The Gray Monzogranitic Facies has porphyritic texture with graphic to granophiric fine-grained groundmass. It consists of quartz, plagioclase, alkali feldspar, and mafic aggregates (biotite and amphibole). Both facies were metamorphosed at greenschist facies and the Pink Syenogranitic Facies, which is milonytic in nature when it is in shear zones. One event of ductile–brittle deformation was identified, originated in a compressive system. It was responsible for the schistosity and mineral-stretching lineation. The development of the Esperança shear zone is related to this deformational phase and reflects the cinematic history of the reverse convergent system with top transport to NWW. Chemically, these rock types are classified as A2-type granitoids of range alkaline potassium saturated on silica. Geochronological data obtained by U-Pb (Sensitive High Resolution Ion Microprobe) method in zircon resulted in an age of 1749 ± 45 Ma, interpreted as crystallization age of the batholith. From the geotectonic point, the Cerro Porã Granite is considered to be the product of a magmatism associated with a magmatic arc developed in Statherian and emplaced in late-orogenic to post-orogenic stage. O Batólito Cerro Porã é um corpo de aproximadamente 30 por 4 km de extensão, localizado na região de Porto Murtinho, Mato Grosso do Sul. Situa-se nos domínios do Terreno Rio Apa, porção sul do Cráton Amazônico. Constitui-se pela Fácies sienogranítica rosa e Fácies monzogranítica cinza. A primeira é caracterizada por textura equi a, essencialmente, inequigranular xenomórfica e pela presença constante de intercrescimentos gráfico e granofíric; constitui-se por feldspatos alcalinos, quartzo e plagioclásio, tendo biotita como único máfico primário. A Fácies monzogranítica cinza apresenta textura porfirítica, com uma matriz de granulação fina gráfica a granofírica e consiste de quartzo, plagioclásio, feldspatos alcalinos e agregados máficos (biotita e anfibólio). Ambas foram metamorfizadas na fácies xisto verde e a Fácies sienogranítica rosa mostra-se milonitizada quando em zonas de cisalhamento. Foi identificado um evento deformacional dúctil-rúptil originado em regime compressivo, responsável pela geração de xistosidade e lineação de estiramento mineral. A Zona de Cisalhamento Esperança relaciona-se a esta fase e reflete a história cinemática convergente, reversa a de cavalgamento, com transporte de topo para NWW. Quimicamente, esses litotipos classificam-se como granitoides do tipo A2 da série alcalina potássica saturada em sílica. Determinação geocronológica obtida pelo método U-Pb (SHRIMP) em zircão, forneceu idade de 1749 ±45 Ma para sua cristalização. Do ponto vista geotectônico, admite-se que o Granito Cerro Porã corresponda a um magmatismo associado a um arco vulcânico desenvolvido no Estateriano e que sua colocação se deu no estágio tardi a pós-orogênico. 2015-03-13T12:57:25Z 2015-03-13T12:57:25Z 2013-09 Artigo de Periódico PEXEPLENS, Dalila et al. Cerro Porã Batholith: post-orogenic A-type granite from the Amoguijá Magmatic Arc - Rio ApaTerrane - South of the Amazonian Craton. Brazilian Journal of Geology, São Paulo, v. 43, n. 3, p. 515-534, set. 2013. Disponível em:<http://ppegeo.igc.usp.br/pdf/bjg/v43n3/08.pdf>. Acesso em: 10 mar. 2015. <http://dx.doi.org/10.5327/Z2317-48892013000300008>. 2317-4889 http://repositorio.ufpa.br/jspui/handle/2011/6414 eng Acesso Aberto application/pdf |
| institution |
Repositório Institucional - Universidade Federal do Pará |
| collection |
RI-UFPA |
| language |
eng |
| topic |
Geoquímica Geocronologia Granito Cerro Porã Granito Tipo A Cráton Amazônico Porto Murtinho - MS Mato Grosso do Sul - Estado |
| spellingShingle |
Geoquímica Geocronologia Granito Cerro Porã Granito Tipo A Cráton Amazônico Porto Murtinho - MS Mato Grosso do Sul - Estado PLENS, Dalila Pexe Cerro Porã Batholith: post-orogenic A-type granite from the Amoguijá Magmatic Arc - Rio ApaTerrane - South of the Amazonian Craton |
| topic_facet |
Geoquímica Geocronologia Granito Cerro Porã Granito Tipo A Cráton Amazônico Porto Murtinho - MS Mato Grosso do Sul - Estado |
| description |
The Cerro Porã Batholith has an approximately area of 30 km by 4 km, situated at the region of Porto Murtinho, Mato Grosso do Sul. It is located in Rio Apa Terrane, at the southern portion of the Amazonian Craton. It consists of Pink Syenogranitic Facies and Gray Monzogranitic Facies. The first facies is characterized by xenomorphic equigranular texture to essentially inequigranular texture with graphic and granophiric intergrowths. Both facies are composed of alkali feldspar, quartz, and plagioclase with biotite as the only primary mafic mineral. The Gray Monzogranitic Facies has porphyritic texture with graphic to granophiric fine-grained groundmass. It consists of quartz, plagioclase, alkali feldspar, and mafic aggregates (biotite and amphibole). Both facies were metamorphosed at greenschist facies and the Pink Syenogranitic Facies, which is milonytic in nature when it is in shear zones. One event of ductile–brittle deformation was identified, originated in a compressive system. It was responsible for the schistosity and mineral-stretching lineation. The development of the Esperança shear zone is related to this deformational phase and reflects the cinematic history of the reverse convergent system with top transport to NWW. Chemically, these rock types are classified as A2-type granitoids of range alkaline potassium saturated on silica. Geochronological data obtained by U-Pb (Sensitive High Resolution Ion Microprobe) method in zircon resulted in an age of 1749 ± 45 Ma, interpreted as crystallization age of the batholith. From the geotectonic point, the Cerro Porã Granite is considered to be the product of a magmatism associated with a magmatic arc developed in Statherian and emplaced in late-orogenic to post-orogenic stage. |
| format |
Artigo |
| author |
PLENS, Dalila Pexe |
| author2 |
RUIZ, Amarildo Salina SOUSA, Maria Zélia Aguiar de BATATA, Maria Elisa Fróes LAFON, Jean Michel BRITTES, Ana Flávia Nunes |
| author2Str |
RUIZ, Amarildo Salina SOUSA, Maria Zélia Aguiar de BATATA, Maria Elisa Fróes LAFON, Jean Michel BRITTES, Ana Flávia Nunes |
| title |
Cerro Porã Batholith: post-orogenic A-type granite from the Amoguijá Magmatic Arc - Rio ApaTerrane - South of the Amazonian Craton |
| title_short |
Cerro Porã Batholith: post-orogenic A-type granite from the Amoguijá Magmatic Arc - Rio ApaTerrane - South of the Amazonian Craton |
| title_full |
Cerro Porã Batholith: post-orogenic A-type granite from the Amoguijá Magmatic Arc - Rio ApaTerrane - South of the Amazonian Craton |
| title_fullStr |
Cerro Porã Batholith: post-orogenic A-type granite from the Amoguijá Magmatic Arc - Rio ApaTerrane - South of the Amazonian Craton |
| title_full_unstemmed |
Cerro Porã Batholith: post-orogenic A-type granite from the Amoguijá Magmatic Arc - Rio ApaTerrane - South of the Amazonian Craton |
| title_sort |
cerro porã batholith: post-orogenic a-type granite from the amoguijá magmatic arc - rio apaterrane - south of the amazonian craton |
| publishDate |
2015 |
| url |
http://repositorio.ufpa.br/jspui/handle/2011/6414 |
| _version_ |
1832604824147853312 |
| score |
11.755432 |