Skip to content
BY-NC-ND 3.0 license Open Access Published by De Gruyter Open Access August 13, 2015

U-Pb zircon SHRIMP data from the Cana Bravalayered complex: new constraints for themafic-ultramafic intrusions of Northern Goiás,Brazil

  • T. Giovanardi , V. A. V. Girardi , C. T. Correia , S. Sinigoi , C. C. G. Tassinari and M. Mazzucchelli
From the journal Open Geosciences

Abstract

The Cana Brava Complex is the northernmostand least well known layered intrusion of a discontinuousbelt of mafic-ultramafic massifs within the Brasilia Belt,which also comprises theNiquelândia and Barro Alto complexes.Available geochronological data from a range oftechniques (K/Ar, Ar/Ar, Rb/Sr, Sm/Nd and U/Pb) providea range of possible ages (time span from 3.9 Ga to 450 Ma),hence a precise and reliable age for the Cana Brava Complexis still lacking. Also, preliminary isotopic and geochemicaldata of the Cana Brava Complex suggest a significantcrustal contamination, which could have affectedbulk-rock Sr and Nd systematics resulting in meaninglessage determinations. In this paper, we present new U-PbSHRIMP zircon analyses from four samples of differentunits of the Cana Brava Complexwhich suggest that the intrusionoccurred during the Neoproterozoic, between 800and 780 Ma, i.e. at the same age ofNiquelândia. Discordantolder 206Pb/238U ages are provided by inherited zircons,and match the age of the metamorphism of the embeddingPalmeirópolis Sequence.

References

Search in Google Scholar

[1] Girardi V. A. V., Kawashita K., Basei M. A. S., Cordani U., Algumasconsiderações sobre a evolução geológica da região de CanaBrava, a partir de dados geocronológicos. Congresso Brasileirodo Geologia, 1978, 30, Recife, Anais SBG, 1:337-348.Search in Google Scholar

[2] Correia C. T., Girardi V. A. V., Tassinari C. G., Jost H., Rb-Sr andSm-Nd geochronology of the Cana Brava layeredmafic-ultramaficintrusion, Brasil, and considerations regarding its tectonic evolution.Revista Brasileira de Geociências, 1997, 27(2), 163-168.10.25249/0375-7536.1997163168Search in Google Scholar

[3] Pimentel M. M., Jost H., Fuck R. A., O embasamento da FaixaBrasilia e o ArcoMagmático de Goiás. In: Geologia do ContinenteSul-Americano: Evolução da Obra de Fernando FlávioMarques deAlmeida, 2004, 355-368.Search in Google Scholar

[4] Rivalenti G., Girardi V. A. V., Sinigoi S., Rossi A., Siena S., TheNiquelândia mafic-ultramafic complex of central Goiás, Brasil:petrological consideration. Revista Brasileira de Geociências,1982, 12, 380-391.Search in Google Scholar

[5] Rivalenti G., Correia C. T., Girardi V. A. V., Mazzuchelli M., TassinariC. C., Bertotto G. W., Sr-Nd isotopic evidence for crustal contaminationin the Niquelândia complex, Goiás, Central Brasil.Journal of South America Earth Sciences, 2008, 25, 298–312.10.1016/j.jsames.2007.08.007Search in Google Scholar

[6] Girardi V. A. V., Rivalenti G., Sinigoi S., The petrogenesis ofNiquelândia layered basic-ultrabasic complex, central Goiás,Brasil. Journal of Petrology, 1986, 27, 715-744.10.1093/petrology/27.3.715Search in Google Scholar

[7] Pimentel M. M., Ferreira Filho C. F., Amstrong R. A., Shrimp U–Pband Sm–Nd ages of the Niquelândia Layered Complex: Meso(1.25Ga) and Neoproterozoic (0.79Ga) extensional events in CentralBrazil. Precambrian Research, 2004, 132, 132-135.10.1016/j.precamres.2004.02.009Search in Google Scholar

[8] Pimentel M. M., Ferreira Filho C. F., Armele A., Neoproterozoic ageof the Niquelândia complex, Central Brazil: further ID-TIMS andSm–Nd isotopic evidence. Journal of South America Earth Sciences,2006, 21, 228-238.10.1016/j.jsames.2006.05.001Search in Google Scholar

[9] Correia C. T., Girardi V. A. V., Basei M. A. S., Nutman A., CryogenianU-Pb (Shrimp I) zircon ages of anorthosites from the uppersequences of Niquelândia and Barro Alto Complexes, CentralBrasil. Revista Brasileira de Geociências, 2007, 37, 70-75.10.25249/0375-7536.200737S47075Search in Google Scholar

[10] Correia C.T., Sinigoi S., Girardi V. A. V., Mazzucchelli M., TassinariC. C. G., Giovanardi T., The growth of large mafic intrusions:Comparing Niquelândia and Ivrea igneous complexes. Lithos,2012, 155, 167-182.10.1016/j.lithos.2012.08.024Search in Google Scholar

[11] Faure G., Principles of Isotope Geology. J. Wyley & Sons, NewYork, 1986.Search in Google Scholar

[12] Matsui K., Girardi V. A. V., Basei M. A. S., Hasui Y., Geocronologiado complexo básico-ultrabásico de Cana Brava, Goiás. CongressoBrasileiro do Geologia, 1976, 29, Ouro Preto, Anais SBG,4, 279-288.Search in Google Scholar

[13] Fugi M. Y., REE geochemistry and Sm/Nd geochronology of theCana Brava Complex, Brazil. Unpublished Master Thesis, 1989,Kobe University, Japan, 55.Search in Google Scholar

[14] Correia C. T., Petrologia do complexo mafico-ultramáfico deCana Brava, Goiás. PhD Thesis, Universidade de São Paulo, Institutode Geociências, 1994, 152.Search in Google Scholar

[15] Girardi V. A. V., Kurat G., Precambrianmafic and ultramafic rocksof the Cana Brava Complex, Brazil - mineral compositions andevolution. Revista Brasileira de Geociências, 1982, 12(1-3), 313-323.Search in Google Scholar

[16] Almeida F. F.M . de., Evolução tectônica do Centro-Oestebrasileiro no Proterozóico Superior. Anais da Academia Brasileirade Ciências, 1968, 40, 285-295.Search in Google Scholar

[17] Ferreira Filho C. S., Pimentel M. M.,Maria de Araujo S., Laux J. H.,Layered intrusions and volcanic sequences in Central Brazil: geologicaland geochronological constraints for Mesoproterozoic(1.25 Ga) and Neoproterozoic (0.79 Ga) igneous associations.Precambrian Research, 2010, 183, 617-634.10.1016/j.precamres.2010.06.008Search in Google Scholar

[18] Moraes R., Fuck A. R., Pimentel M. M., Gioia S. M. C. L., HollandaM. H. B. M., Armstrong R., The bimodal rift-related volcanosedimentarysequence in Central Brazil: Mesoproterozoic extensionand Neoproterozoic metamorphism. Journal of South AmericanEarth Sciences, 2006, 20, 287-301.10.1016/j.jsames.2005.07.016Search in Google Scholar

[19] Correia C. T., O método Re-Os e o estudo da origem e daevolução tectônica dos grandes complexosmáficos-ultramáficosdo centro-oeste do Brasil. Livre Docência, Universidade de SãoPaulo, Instituto de Geociências, 2001, 60.Search in Google Scholar

[20] Corfu F., Hanchar J. M., Hoskin P. W. O., Kinny P., Atlas of zircontextures. Zircon. In: Hanchar, J.M., Hoskin, P.W.O., MineralogicalSociety of America and Geochemical Society, Reviews in Mineralogyand Geochemistry, 2003, 53, 469-500.10.1515/9781501509322-019Search in Google Scholar

[21] Ludwig K. R., Isoplot 4.1. A geochronological toolkit for MicrosoftExcel. Berkeley Geochronology Center special publication, 2009,4, 76.Search in Google Scholar

[22] Ferreira Filho C. F., Nilson A. A., Naldrett A. J., The NiquelândiaMafic-Ultramafic Complex, Goias, Brazil: a contribution to theophiolite × stratiform controversy based on new geological andstructural data. Precambrian Research, 1992, 59, 125-143.10.1016/0301-9268(92)90054-RSearch in Google Scholar

[23] Suita M. T. F., Kamo S., Kroght T. E., Fyfe W. S., Hartmann L. A.,U–Pb ages from the high-grade Barro Altomafic–ultramafic complex(Goiás, central Brazil): middle Proterozoic continental maficmagmatism and upper Proterozoic continental collision. In: InternationalConference on Geochronology Cosmochronology andIsotope Geology, Berkeley, USGS, ICOG, Abstracts, 1994, 8, 309.Search in Google Scholar

[24] Correia C. T., Jost H., Tassinari C. C. G., Girardi V. A. V., KinnyP., Ectasian Mesoproterozoic U–Pb ages (SHRIMP-II) for themetavolcano-sedimentary sequences of Juscelândia and Indaianópolisand for high-grade metamorphosed rocks of Barro Altostratiform igneous complex, Goiás State, central Brazil. In: SAAGISouth American Symposiumon Isotopic Geology, Córdoba, 1999,Actas SEGEMAR 2, 31-33.Search in Google Scholar

Received: 2014-03-18
Accepted: 2014-10-15
Published Online: 2015-08-13

©2015 T. Giovanardi et al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Downloaded on 19.3.2024 from https://www.degruyter.com/document/doi/10.1515/geo-2015-0015/html
Scroll to top button