P-Li-Be Bearing Pegmatites of the South East Brazil


The P-Li-Nb pegmatites are located in the south of Brazil, in the states of Minas Gerais and Espirito Santos. They represent the largest pegmatite fields of Brazil and the richest in precious stones. Two types of pegmatites are characterized by their mineralogical characteristics and tectonic and magmatic relations. The first group occurred during a compressive deformation phase D1 about 582 Ma and 550℃ - 700℃ and 4 - 5 kb. The second pegmatites group was formed during the decompression phase D2 (520 - 500 Ma) of the Brasiliano metamorphic rock fusion. The geochemical parameters of the P-Li-Be bearing pegmatites of the first group show the same trend fractionation, as suggested by the mineralogical composition. The variation of tourmaline and columbite-tantalite composition of the first group game again applies a change of melt composition during the regional development of the pegmatites. A systematic compositional trend seems to suggest a petrogenetic link between the pegmatites of the region. The Fe/Mn ratio of tourmaline in samples of the first group shows the same behavior as in columbite-tantalite and garnets. The simple pegmatites are transiting north in the gem-rich pegmatites. The Fe/Mn ratio not only shows qualitatively the fractionation index, the degree of regional development, but also the internal development of the body. The ratio shows a negative correlation with lithium. The Co, Zn and Nb contents are rising at first group, but falling when starting crystallization of garnet, columbite-tantalite, and Behierit.

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E. Bilal, A. Heinrich Horn and F. Machado de Mello, "P-Li-Be Bearing Pegmatites of the South East Brazil," International Journal of Geosciences, Vol. 3 No. 2, 2012, pp. 281-288. doi: 10.4236/ijg.2012.32029.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] C. P. Pinto, “Projeto Leste-MG. Relatorio Integrado CPRM,” 1997.
[2] E. Bilal, A. H. Horn, H. A. Nalini, J. M. Correia-Neves, A. Giret, J. Moutte, K. Fuzikawa, M. L. S. Fernandez and F. M. de Mello, “The Neoproterozoic Granitoid Suites in South-Easthern Brazil,” Special Issue Revista Brasileira de Geocience, Vol. 30, No. 1, 2000, pp. 51-54.
[3] E. Bilal, A. H. Horn and J. Moutte, “Zur Mineralogie und chemischen Zusammensetzung der Pegmatite in Ostbrasilien,” Münchener Geologische Hefte, Vol. A28, 2000, pp. 91-97.
[4] H. A. Nalini, E. Bilal, J. M. Correia-Neves and M. A. Carneiro, “Evidence of the Crustal Contribution from the Typological of Zircons in the Granitic of Mddio Rio Doce Region, Minas Gerais,” Proceeding of the 39th Congress Brazil Geology, Salvador, Vol. 6, 1996, pp. 418-420
[5] E. Bilal, H. Horn, H. A. Nalini, J. M. Correia-Neves and F. M. Mello, “Evolucao magmatica das suites granitoides proterozoicos do Setor Setentrional Província Estrutural Mantiqueira, Minas Gerais, Espírito Santo, Brasil,” Geonomos, Vol. 8, No. 1-2, 2001, pp. 77-86.
[6] E. Bilal, A. H. Horn, H. A. Nalini, J. M. Correia-Neves, A. Giret, K. Fuzikawa and M. L. S. Fernandez, F. M. de Mello and J. Moutte, “Neoproterozoic Granitoid Suites of Rio Doce Region, Brazil,” In International Conference on Precambrian and Craton Tectonics, Ouro Preto, 1998, pp. 41-43.
[7] A. C. Pedrosa-Soares, C. Wiedernann, M. L. S. Fernandes, L. F. Faria and J. C. H. Ferreira, “Geotectonic Significance of Die Neoproterozoic Granitic Magmatism in the Aracuaí belt (SE Brazil): Models and Pertinent Questions,” Revista Brasileira de Geofísica, Vol. 29, 1999, pp. 59-66.
[8] H. A. Nalini, E. Bilal, J. L. Paquette, C. Pin and R. Machado, “U-Pb Geochronology and Sr-Nd Isotopical Geochemistry of the Galiléia and Urucum Suites the Neoproterozoic Granitoids, Rio Doce Valley, Southeastern Brazil,” Comptes Rendus Geoscience of the Paris Academy of Sciences, Vol. 331, 2000, pp. 459-466.
[9] E. Bilal, J. Cesar-Mendes, J. M. Correia-Neves, M. Nasraoui and K. Fuzikawa, “Chemistry of Tourmalines in Some Pegmatites of S?o José da Safira Area, Minas Gerais, Brazil,” Journal of the Czech Geological Society, 1998, Vol. 43, No. 1-2, pp. 33-38.
[10] J. César-Mendes, E. Bilal, J. M. Correia-Neves and A. Giret, “As Turmalinas de Pegmatitos da Regiao de Sao José da Safira, Estado de Minas Gerais,” 38th Cong. Bras. Geol., Balneário Camboriú. Bol. Res. Expand. Balneário Camboriú, SBG, Vol. 1, 1994, pp. 204-205.
[11] E. Bilal, J. César-Mendes and J. Correia-Neves, “The Columbo-Tantalite Bearing the Pegmatites from Sao José da Safira Region, Minas Gerais,” Proceeding of the 38th Brazilian Geology Congress, Camboriú., Vol. 1, 1984, pp. 198-199.
[12] F. M. de Mello and E. Bilal, “The Perphosphorous Leucogranites of the Minas Gerais State, Brazil,” Romanian Journal of Mineral Deposits, Vol. 81, 2004, pp. 140-143.
[13] J. J. Celino, “Variacao Compositional em Suites de Granitóides Neoproterazóicos e sua Implicacao na Evolucao do Orógeno Arucuaí (Brasil)—Oeste Congolês (Africa),” Ph.D. Thesis, Instituto de Geociências, Universidade de Brasilia, Brasília, 1999.
[14] E. Bilal, H. Horn, H. Nalini Jr., F. M. de Mello, J. M. Correia-Neves, A. Giret, J. Moutte, K. Fuzikawa, M. L. Fernandes, “The Neoproterozoic Granitoid Suites in Southeastern Brazil,” Revista Brasileira de Geocience, Vol. 30, No. 1, 2000, pp. 51-54.
[15] E. Bilal, H. Horn, V. R. O. P. Marciano, M. L. Fernandes, J. M. Correia-Neves, K. Fuzikawa, J. Moutte, F. M. de Mello and M. Nasraoui, “The Chemitry of Pegmatites in the Southeastern Brazil,” Special Issue of Revista Brasileira de Geocience, Vol. 30, No. 1, 2000, pp. 234-237.
[16] M. Smoler, “Petrographishe, Geochemische und Phasenpetrologische Untersuchungen an Metasedimenten des NW Spessart, Bayern,” Ph.D. Disertation, University of Würzburg, Würzburg, 1987.
[17] H. H?ussinger, “Geochemische und Petrologische Untersuchungen an Metasediment?ren Nebenges Teinen und Assoziierten Metabasiten der Sulfide Rzvorkommen von Gorob, Damara Orogen, Namibia,” Ph.D Disertation, University of Würzburg, Würzburg, 1990.

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