Artigo

Mineral chemistry and crystallization parameters of the A-type Paleoproterozoic Bannach Granite, Carajás Province, Pará, Brazil

The A-type Paleoproterozoic Bannach Granite belongs to the Jamon Suíte and cross-cut the Archean units of the Rio Maria Domain in the Carajás Province. It comprises eight facies with varied mafic content and texture: even-grained cumulate granite (CG), even coarse-grained biotite-amphibole monzogran...

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Autor principal: MESQUITA, Caio José Soares
Outros Autores: ALMEIDA, José de Arimatéia Costa de, DALL'AGNOL, Roberto
Grau: Artigo
Idioma: eng
Publicado em: Sociedade Brasileira de Geologia 2019
Assuntos:
Mineral chemistry
A-type granite
Bannach
Paleoproterozoic
Carajás Province
Crystallization parameters
Acesso em linha: http://repositorio.ufpa.br/jspui/handle/2011/11226
http://dx.doi.org/10.1590/2317-4889201820170082 
id ir-2011-11226
recordtype dspace
spelling ir-2011-112262023-11-22T16:24:40Z Mineral chemistry and crystallization parameters of the A-type Paleoproterozoic Bannach Granite, Carajás Province, Pará, Brazil MESQUITA, Caio José Soares ALMEIDA, José de Arimatéia Costa de DALL'AGNOL, Roberto Mineral chemistry A-type granite Bannach Paleoproterozoic Carajás Province Crystallization parameters The A-type Paleoproterozoic Bannach Granite belongs to the Jamon Suíte and cross-cut the Archean units of the Rio Maria Domain in the Carajás Province. It comprises eight facies with varied mafic content and texture: even-grained cumulate granite (CG), even coarse-grained biotite-amphibole monzogranite (cBAMz), even coarse-grained amphibole-biotite monzogranite (cABMz), porphyritic biotite monzogranite (pBMz), even coarse-grained leucomonzogranite (cLMz), early even medium-grained leucomonzogranite (EmLMz), late even medium-grained leucomonzogranite (LmLMz) and even fine-grained leucomonzogranite (fLMz). In the less evolved facies, the dominant amphibole is Fe-hornblende passing to Fe-edenite or hastingsite, with associated cummingtonite/grunerite originated from the destabilization of clinopyroxene. Biotite has ferroan composition and approaches annite in the late-emplaced leucomonzogranite. Plagioclase varies from andesine to oligoclase or from oligoclase to albite. Titanite, magnetite, and ilmenite are found in all granite facies showing magmatic origin. The near liquidus temperatures vary between 943ºC and 795ºC and the estimated emplacement pressure is 300 ± 50 MPa (~11.1 ± 1.9 km). Amphibole Fe/(Fe + Mg) ratios together with magmatic magnetite and titanite indicate that these granites crystallized at moderately oxidizing conditions, similar to those admitted for the Jamon granite and magnetite series granites of Laurentia. However, the composition of biotite suggests a more reduced character close to NNO to NNO -0.5. The late leucomonzogranite facies is an exception because it displays high Fe/(Fe + Mg) ratios in biotite and approaches to the reduced granites of Carajás, Laurentia and Fennoscandia in this regard. It derived from a more reduced source than the other facies of Bannach Granite PETROBRAS MESQUITA, C. J. S; DALL'AGNOL, R. Universidade federal do Pará 2019-05-29T18:40:02Z 2019-05-29T18:40:02Z 2018-09 Artigo de Periódico MESQUITA, Caio José Soares, DALL'AGNOL, Roberto, ALMEIDA, José de Arimatéia Costa de. Mineral chemistry and crystallization parameters of the A-type paleoproterozoic Bannach Granite, Carajás Province, Pará, Brazil. Brazilian Journal of Geology, São Paulo, v. 48 , n. 3, p. 575-601, jul./set. 2018. DOI : http://dx.doi.org/10.1590/2317-4889201820170082. Disponível em: http://repositorio.ufpa.br/jspui/handle/2011/11226. Acesso em:. 2317-4692 http://repositorio.ufpa.br/jspui/handle/2011/11226 http://dx.doi.org/10.1590/2317-4889201820170082  eng Brazilian Journal of Geology Acesso Aberto application/pdf Sociedade Brasileira de Geologia Brasil SBG http://ref.scielo.org/68cpym
institution Repositório Institucional - Universidade Federal do Pará
collection RI-UFPA
language eng
topic Mineral chemistry
A-type granite
Bannach
Paleoproterozoic
Carajás Province
Crystallization parameters
spellingShingle Mineral chemistry
A-type granite
Bannach
Paleoproterozoic
Carajás Province
Crystallization parameters
MESQUITA, Caio José Soares
Mineral chemistry and crystallization parameters of the A-type Paleoproterozoic Bannach Granite, Carajás Province, Pará, Brazil
topic_facet Mineral chemistry
A-type granite
Bannach
Paleoproterozoic
Carajás Province
Crystallization parameters
description The A-type Paleoproterozoic Bannach Granite belongs to the Jamon Suíte and cross-cut the Archean units of the Rio Maria Domain in the Carajás Province. It comprises eight facies with varied mafic content and texture: even-grained cumulate granite (CG), even coarse-grained biotite-amphibole monzogranite (cBAMz), even coarse-grained amphibole-biotite monzogranite (cABMz), porphyritic biotite monzogranite (pBMz), even coarse-grained leucomonzogranite (cLMz), early even medium-grained leucomonzogranite (EmLMz), late even medium-grained leucomonzogranite (LmLMz) and even fine-grained leucomonzogranite (fLMz). In the less evolved facies, the dominant amphibole is Fe-hornblende passing to Fe-edenite or hastingsite, with associated cummingtonite/grunerite originated from the destabilization of clinopyroxene. Biotite has ferroan composition and approaches annite in the late-emplaced leucomonzogranite. Plagioclase varies from andesine to oligoclase or from oligoclase to albite. Titanite, magnetite, and ilmenite are found in all granite facies showing magmatic origin. The near liquidus temperatures vary between 943ºC and 795ºC and the estimated emplacement pressure is 300 ± 50 MPa (~11.1 ± 1.9 km). Amphibole Fe/(Fe + Mg) ratios together with magmatic magnetite and titanite indicate that these granites crystallized at moderately oxidizing conditions, similar to those admitted for the Jamon granite and magnetite series granites of Laurentia. However, the composition of biotite suggests a more reduced character close to NNO to NNO -0.5. The late leucomonzogranite facies is an exception because it displays high Fe/(Fe + Mg) ratios in biotite and approaches to the reduced granites of Carajás, Laurentia and Fennoscandia in this regard. It derived from a more reduced source than the other facies of Bannach Granite
format Artigo
author MESQUITA, Caio José Soares
author2 ALMEIDA, José de Arimatéia Costa de
DALL'AGNOL, Roberto
author2Str ALMEIDA, José de Arimatéia Costa de
DALL'AGNOL, Roberto
title Mineral chemistry and crystallization parameters of the A-type Paleoproterozoic Bannach Granite, Carajás Province, Pará, Brazil
title_short Mineral chemistry and crystallization parameters of the A-type Paleoproterozoic Bannach Granite, Carajás Province, Pará, Brazil
title_full Mineral chemistry and crystallization parameters of the A-type Paleoproterozoic Bannach Granite, Carajás Province, Pará, Brazil
title_fullStr Mineral chemistry and crystallization parameters of the A-type Paleoproterozoic Bannach Granite, Carajás Province, Pará, Brazil
title_full_unstemmed Mineral chemistry and crystallization parameters of the A-type Paleoproterozoic Bannach Granite, Carajás Province, Pará, Brazil
title_sort mineral chemistry and crystallization parameters of the a-type paleoproterozoic bannach granite, carajás province, pará, brazil
publisher Sociedade Brasileira de Geologia
publishDate 2019
url http://repositorio.ufpa.br/jspui/handle/2011/11226
http://dx.doi.org/10.1590/2317-4889201820170082 
_version_ 1832603709140369408
score 11.755432

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