Geology and U-Pb geochronology of the Banabuiú granite, Northeastern Ceará, Brazil
DOI:
https://doi.org/10.3989/egeol.40196.113Keywords:
Brasilian Orogeny, two-mica granites, U-Pb geochronologyAbstract
The Banabuiú massif crops out in the Central Ceará Domain (DCC) of the Borborema Province (NE Brasil), as an N-S elongate granite intrusion, concordant with the regional structures. It was emplaced into basement rocks of Paleoproterozoic age, extensively transformed into gneisses and migmatites during the Brasilian orogeny (~600 Ma). Using U-Pb zircon dating, the crystallization age of the Banabuiú syn-kinematic two-mica granite was estimated at 578.6 ± 6.5 Ma. The granite is strongly peraluminous (A/CNK = 1,098 – 1,134) and shows a typical S-type geochemical signature. The εNd580 values are strongly negative (εNd580 = –19 a –23) and partially overlap with those of the Paleoproterozoic gneissmigmatite complex (εNd580 = –12 to –26), suggesting that the parental magmas of the Banabuiú granite could have been produced by partial melting of similar crustal materials.
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Almeida, F.F.M.; Melcher, G.C.; Cordani, U.G.; Kawashita, K. & Vandoros, P. (1968). Radiometric age determinations from northern Brazil. Boletim da Sociedade Brasileira de Geologia, 18: 3-14.
Arthaud, M.H.; Vasconcelos, A.M.; Nogueira Neto, J.A.; Oliveira, F.V.C.; Parente, C.V.; Monié, P.; Liégeois, J.P.; Caby, R. & Fetter, A.H. (1998). Main Structural Features of Precambrian Domains From Ceará (NE Brazil). International Conference on Basement Tectonics, 14th, Ouro Preto, Abstracts: 84-85.
Arthaud, M.H. (2005). Geologia e tectônica no Domínio Ceará Central. Qualificação ao Doutorado em Geologia, Programa de Pós-Graduação em Geologia, Instituto de Geociências, Universidade de Brasília (UNB), 270 pp.
Arthaud, M.H.; Caby, R.; Fuck, R.A.; Dantas, E.L. & Parente, C.V. (2008). Geology of the northern Borborema Province, NE Brazil and its correlation with Nigeria, NW Africa. In: West Gondwana: Pre-Cenozoic Correlations Across the South Atlantic Region (Pankhurst, R.J., Trouw, R.A.J., Brito Neves, B.B. & De Wit M.J., eds.). Geological Society, London, Special Publications, 294: 49-67.
Barker, F. (1979). Trondhjemite: definition, environment and hypotheses of origin. In: Trondhjemites, Dacites and Related Rocks (F. Barker, ed.), Developments in Petrology 6, Elsevier, Amsterdam, 1-12.
Baumgartner, R.; Rolf, L.; Romer, R.L.; Moritz, R.; Sallet, R. & Chiaradia, M. (2006). Columbite-tantalitebearing granitic pegmatites from the Seridó Belt, NE Brazil: genetic constraints from U-Pb dating and Pb isotopes. Canadian Mineralogist, 44: 69-86. doi:10.2113/gscanmin.44.1.69
Brito Neves, B.B.; Santos, E.J. & Van Schmus, W.R., (2000). Tectonic History of the Borborema Province, Northeastern Brazil, Proceedings of the 31st International Congress, Rio de Janeiro: 151-182.
Delgado, I.M.; Souza, J.D.; Silva, L.C.; Silveira Filho, N.C.; Santos, R.A.; Pedreira, A.J.; Guimarães, J.T.; Angelim, L.A.A.; Vasconcelos, A.M.; Gomes, I.P.; Lacerda Filho, J.V.; Valente, R.C.; Perrota, M.M. & E Heineck, C.A. (2003). Geotectônica do Escudo Atlântico. In: Geologia, Tectônica e Recursos Minerais do Brasil (Bizzi, L.A.; Schobbenhaus, C.; Vidotti, R.M. & Gonçalves, J.H., eds.). CPRM, Brasília, Brasil, 227-334.
Evensen, N.H.; Hamilton, P.J. & O’Nions, R.K. (1978). Rare earth abundances in chondrite meteorites. Geochimica et Cosmochimica Acta, 42: 1199-1212. doi:10.1016/0016-7037(78)90114-X
Fetter, A.H. (1999). U/Pb and Sm/Nd Geochronological Constraints On The Crustal Framework and Geologic History Of Ceará State, NW Borborema Province, NE Brazil: Implications For The Assembly Of Gondwana. PhD Thesis, Department of Geology, Kansas University, Lawrence, 164 pp.
Fetter, A.H.; Van Schmus, W.R.; Santos, T.J.S.; Nogueira Neto, J.A. & Arthaud, M.H. (2000). U/Pb and Sm/Nd geochronological constraints on the crustal evolution and basement architecture of Ceará State, NW Borborema Province, NE Brazil: Implications for the txistence of the paleoproterozoic supercontinent «Atlantica». São Paulo. Revista Brasileira de Geociências, 30: 102-106.
Foster, M.D. (1960). Interpretation of trioctahedrical micas. U.S. Geological Survey Professional Paper, 354-B: 1-49.
Le Bas, M.J. & Streckeisen, A.L. (1991). The IUGS systematics of igneous rocks. Journal of the Geological Society of London, 148: 825-833. doi:10.1144/gsjgs.148.5.0825
Lima, M.N. (2008). Caracterização litogeoquímica do granito Banabuiú e seu encaixante (Brasil). Tesis de Mestrado. Universidade de Aveiro, Portugal, 168 pp.
Mattos, I.C.; Artur, A.C.; Nogueira Neto, J.A. (2003). Caracterização físico-mecânica do Granito Ornamental Serra do Barriga, Sobral/CE: resultados preliminares. Anais do IV Simpósio de Rochas Ornamentais do Nordeste, Rio de Janeiro, CETEM/SBG, 1: 86-93.
Nachit, H.; Razafimahefa; N.; Stussi, J.M. & Carron, J.P. (1985). Composition chimique des biotites et typologie magmatique des granitoïdes. Comptes Rendus de l’Academie dês Sciences de Paris, 301: 813-818.
Nockolds, S.R. (1947). The relation between chemical composition and paragenesis in the biotite micas of igneous rocks. American Journal of Science, 245: 401-420.
Nogueira, J.F. (2004). Estrutura, Geocronologia e Alojamento dos Batólitos de Quixadá, Quixeramobim e Senador Pompeu – Ceará Central. Tesis Doctoral. Universidade Estadual Paulista, Rio Claro, São Paulo, 123 pp.
Pearce, J.; Harris, N. & Tindle, A. (1984). Trace element discrimination diagrams for the tectonic interpretation of granitic rocks. Journal of Petrology, 25: 956-983.
Tavares Jr., S.S., (1992). Caracterização litoquímica e geocrolologia Rb/Sr das rochas granitóides e ortognaisses da região de Santa Quitéria-Sobral, NW do Ceará. Tesis de Mestrado. Curso de Pós-Graduação em Geociências, Universidade Federal do Pará, 143 pp.
Van Schmus, W.R.; Brito Neves, B.B.; Hackspacher, P.; Fetter, A.H.; Kozuch, M.; Dantas, E.L. & Babinski, M. (1997). The Borborema Province: A collage of polycyclic crustal domains in NE Brazil. Livro de resumos do XVII Simpósio de Geologia do Nordeste, 115-120.
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