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Journal articles
Chemistry of tourmalines in some pegmatites of São José da Safira area, Minas Gerais, Brazil
Abstract : The tourmaline group minerals (schorl to elbaite) typically occur in the Li-bearing pegmatites from the São José da Safira region (the Oriental Pegmatitic Province (OPP) in Minas Gerais State, Brazil). The Fe/Mn ratios of the tourmalines are compared to those measured in columbite-tantalite and garnet and decrease northward continuously from the beryl-bearing pegmatites to the spodumene-bearing ones. The Fe/Mn ratio has been used as a qualitative index of fractionation which seems to reflect the regional zoning of the pegmatites around a hidden granite body. The Fe/Mn ratio values correlate negatively with the Na and Li contents. The REE, Nb, Co and Zn contents are controlled by the mineral assemblages.
https://hal-emse.ccsd.cnrs.fr/emse-00613218
Contributor : Andrée-Aimée Toucas <>
Submitted on : Wednesday, August 3, 2011 - 3:44:41 PM
Last modification on : Tuesday, April 20, 2021 - 12:12:07 PM
Contributor : Andrée-Aimée Toucas <>
Submitted on : Wednesday, August 3, 2011 - 3:44:41 PM
Last modification on : Tuesday, April 20, 2021 - 12:12:07 PM