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Mineralogy and technological characterization of two kaolin deposits from the Borborema Pegmatite Province, northeastern Brazil

  • Victor Matheus Joaquim Salgado Campos (a1) (a2) (a3), Luiz Carlos Bertolino (a1) (a3), Luana Caroline Silveira Nascimento (a1) (a4), José Yvan Pereira Leite (a5), Vitor Schwenk Brandão (a1), Odivaldo Cambraia Alves (a6) and Job Tolentino Junior (a1) (a3)...


This research presents the mineralogical and chemical characterization and beneficiation study of two kaolin deposits from the Borborema Pegmatite Province, Brazil. Seven samples were collected and treated in two different beneficiation routes involving magnetic separation and chemical bleaching. The fractions obtained were studied by X-ray diffraction, X-ray fluorescence spectrometry, scanning electron microscopy, particle-size analyses, electron paramagnetic resonance and determination of optical properties. The samples are composed mainly of subhedral kaolinite in the form of booklets, as well as muscovite, quartz, microcline and illite impurities. The kaolinite structural formulae indicated significant replacement of Si4+ by Al3+ in tetrahedral sites and low replacement of Fe3+ by Al3+ in the octahedral sites. The first 30 min of chemical bleaching improved significantly the optical properties of kaolin, indicating that the process is more efficient than magnetic separation.


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Associate Editor: J. Huertas



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Almeida, F.F.M., Hasui, Y., Brito Neves, B.B. & Fuck, R.A. (1981) Brazilian structural provinces: an introduction. Earth-Science Review, 17, 129.
Angelim, L.A.A., Vasconcelos, A.M., Gomes, J.R.C., Wanderley, A.A., Fordiarini, L.L. & Medeiros, M.F. (2004) Carta Geológica do Brasil ao Milionésimo: Folha SB.24-Jaguaribe. CPRM, Brasília, Brazil.
Archanjo, C.J. & Salim, J. (1986) Posição da Formação Seridó no contexto estratigráfico regional (RN-PB). Pp. 270281 in: Simpósio de Geologia do Nordeste, Atas XII Simpósio Geologia Nordeste. Sociedade Brasileira de Geologia Núcleo Nordeste, Natal, Brazil.
Bertolino, L.C., Rossi, A.M., Scorzelli, R.B. & Torem, M.L. (2010) Influence of iron on kaolin whiteness: an electron paramagnetic resonance study. Applied Clay Science, 49, 170175.
Beurlen, H., Barreto, S., Martin, R., Melgarejo Draper, J.C., Da Silva, M.R.R. & Souza Neto, J.A. (2009) The Borborema Pegmatite Province, NE-Brazil revisited. Estudos Geológicos, 19, 6266.
Beurlen, H., Da Silva, M.R.R., Thomas, R., Soares, D.R. & Olivier, P. (2008) Nb-Ta-(Ti-Sn)-oxide mineral chemistry as tracers of rare-element granitic pegmatite fractionation in the Borborema Province, Northeast Brazil. Mineralium Deposita. 43, 207228.
Brindley, G.W. (1980) Quantitative X-ray analysis of clays. Pp. 411438 in: Crystal Structures of Clay Minerals and their X-ray Identification (Brindley, G.W. & Brown, G., editors). Mineralogical Society Monograph 5. Mineralogical Society, London, UK.
Brito Neves, B.B. (1983) O mapa geológico do Nordeste oriental do Brasil. Dissertação de Livre Docência. Escala 1:1,000,000. Universidade de São Paulo.
Campos, A.P., Monteiro, C.C.O., Costa, D.T. & Silva, R.D. (2016) Caulim. Pp. 4041 in: Departamento Nacional de Produção Mineral. Sumário Mineral. DNPM/MME, Brasilia, Brazil.
Campos, V.M.J.S., Bertolino, L.C. & Alves, O.C. (2017) Mineralogical characterization and beneficiation study of kaolin from Equador (RN) and Junco do Seridó (PB) to increase the brightness index. Cerâmica, 63, 369375.
Clozel, B., Allard, T. & Muller, J.P. (1994) Nature and stability of radiation-induced defects in natural kaolinites: new results and a reappraisal of published works. Clays and Clay Minerals, 42, 657666.
Dardenne, M.A. & Schobbenhaus, C. (editors) (2001) Metalogênese do Brasil. UnB/CPRM, Brasilia, Brazil.
Dill, H.G., Dohrmann, R., Kaufhold, S. & Balaban, S. (2015) Kaolinization – a tool to unravel the formation and unroofing of the Pleystain pegmatite-aplite system (SE Germany). Ore Geology Reviews, 69, 3356.
Erkoyun, H. & Kadir, S. (2011) Mineralogy, micromorphology, geochemistry and genesis of a hydrothermal kaolinite deposit and altered Miocene host volcanites in the Hallaçlar area, Usak, western Turkey. Clays and Clay Minerals, 46, 421448.
Fentaw, H.M. & Mengistu, T. (1998) Comparison of Kombelcha and Bombowha kaolins of Ethiopia. Applied Clay Science, 13, 149164.
Gopinath, T.R. & Muniz e Silva, C.M.M. (1990) Processo de formação de caulim primário nos pegmatitos da região de Junco do Seridó, Paraíba. Pp. 12941301 in: Congresso Brasileiro de Geologia, 3, Paraíba. Anais do III Congresso Brasileiro de Geologia, Paraíba. Sociedade Brasileira de Geologia, Sao Paolo, Brazil.
Jardim de Sá, E.F. & Salim, J. (1980) Reavaliação dos conceitos estratigráficos na região do Seridó (RN-PB). Mineração e Metalurgia, 80, 1628.
Johnston, W.D. Jr (1945) Beryl-tantalite pegmatites of Northeastern Brazil. Geological Society American Bulletin, 56, 10151070.
Kadir, S. & Akbulut, A. (2009) Mineralogy, geochemistry and genesis of the Tașoluk kaolinite deposits in pre-Early Cambrian metamorphites and Neogene volcanites of Afyonkarahisar, Turkey. Clay Minerals, 44, 89112.
Keller, W.D. (1978) Classification of kaolins exemplified by their textures in scan electron micrographs. Clays and Clay Minerals, 26, 120.
Legrand, J.M., Martins Sá, J., Neves Maia, H. & De Souza, L.C. (2009) Carta Geológica Folha Jardim do Seridó SB-24-Z-B-V. CPRM, Brasilia, Brazil.
Leite, J.Y.P., Araújo, F. & Tavares, T. (2014) Small scale mining cluster of kaolin in Brazil. Presented at: XXVII International Mineral Processing Congress, Santiago, Chile.
Leite, J.Y.P., Veras, M.M., Santos, E.P., Lima, R.F.S., Paulo, J.B.A. & Pinheiro, M. (2007) Technological characterization of kaolin tailing from small-scale mining in RN and PB states – Brazil. Minerals Engineering, 20, 959961.
Madeiros Lima, E.A., Wanderley, A.A., Vieira, A.T., Medina, A.I.M., Barbosa, A.J., Vasconcelos, A.M., Amaral, C.A., Sato, E.Y., Silva, E.H.R.O., Leite, J.F., Moraes, J.F.S., Ribeiro, J.A., Nesi, J.R., Angelim, L.A.A. & Calheiros, M.E.V. (1980) Projeto scheelita do Seridó – relatório final. DNPM/CPRM, Recife, Brazil.
Meads, R.E. & Malden, P.J. (1975) Electron spin resonance in natural kaolinite containing Fe3+ and other transition metal ions. Clay Minerals, 10, 313345.
Montes, C.R., Melfi, A.J., Carvalho, A., Vieira Coelho, A.C. & Formoso, M.L.L. (2002) Genesis, mineralogy and geochemistry of kaolin deposits of the Jari River, Amapá State, Brazil. Clays and Clay Minerals, 50, 494503.
Moore, D.M. & Reynolds, R.C. Jr (1989) X-Ray Diffraction and the Identification and Analysis of Clay Minerals. Oxford University Press, New York, NY, USA.
Murray, H.H. & Keller, W.D. (1993) Kaolins, kaolins, and kaolins. Pp. 124 in: Kaolin: Genesis and Utilization (Murray, H.H., Bundy, W.M. & Harvey, C.C., editors). The Clay Minerals Society, Chantilly, VA, USA.
Parker, J.M. III (1946) Residual Kaolin Deposits of the Spruce Pine District, Technical Report. United States Geological Survey, Raleigh, NC, USA.
Prasad, M.S., Reid, K.J. & Murray, H.H. (1991) Kaolin: processing, properties and applications. Applied Clay Science, 6, 87119.
Rolff, P.A.M.A. (1945) Boletim 73: Geologia da província tântalo-glucinífera da Borborema, Technical Report. DNPM/DFPM, Rio de Janeiro, Brazil.
Roy, P.L., Dottin, O. & Madon, H.L. (1964) Série Geológica no. 1: Estudo dos pegmatitos do Rio Grande do Norte e da Paraíba, Technical Report. DRN-SUDENE, Recife, Brazil.
Saddiqui, M.A. & Ahmed, Z. (2005) Mineralogy of the Swat kaolin deposits, Pakistan. Arabian Journal for Science and Engineering, 30, 195218.
Scorza, E.P. (1944) Boletim 112: Província Pegmatítica da Borborema, Technical Report. DNPM-DGM/MME, Rio de Janeiro, Brazil.
Scorzelli, R.B., Bertolino, L.C., Da Luz, A.B., Duttine, M., Silva, F.A.N.G. & Munayco, P. (2008) Spectroscopic studies of kaolin from different Brazilian regions. Clay Minerals, 43, 129135.
Silva, F.A.N.G., Da Luz, A.B., Sampaio, J.A., Bertolino, L.C., Scorzelli, R.B., Duttine, M. & Da Silva, F.T. (2009) Technological characterization of kaolins: study of the case of the Borborema–Seridó region (Brazil). Applied Clay Science, 44, 189193.
Silva, M.R.R. & Dantas, J.R.A. (1997) Província pegmatítica da Borborema–Seridó, Paraíba e Rio Grande do Norte, 1st edn. Departamento Nacional de Produção Mineral, Brasilia, Brazil.
Sousa, D.J.L.D., Varajão, A.F.D.C., Yvon, J. & Da Costa, G.M. (2007) Mineralogical, micromorphological and geochemical evolution of the kaolin facies deposit from the Capim region (northern Brazil). Clay Minerals, 42, 6987.
Wilson, I.R., Santos, H.S. & Santos, P.S. (2006) Kaolin and halloysite deposits of Brazil. Clay Minerals, 41, 697716.


Mineralogy and technological characterization of two kaolin deposits from the Borborema Pegmatite Province, northeastern Brazil

  • Victor Matheus Joaquim Salgado Campos (a1) (a2) (a3), Luiz Carlos Bertolino (a1) (a3), Luana Caroline Silveira Nascimento (a1) (a4), José Yvan Pereira Leite (a5), Vitor Schwenk Brandão (a1), Odivaldo Cambraia Alves (a6) and Job Tolentino Junior (a1) (a3)...


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