1991
DOI: 10.25249/0375-7536.19911722
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Mobilidade Do Zircônio Na Bauxitização De Rochas Alcalinas Do Maciço De Poços De Caldas, Minas Gerais

Abstract: Some bauxitic profiles, developed from alkaline rocks of the Poços de Caldas, Minas Gerais, Brazil complex were studied. The preliminary results show that nearly 40% of the total zirconium existing in the rock was leached out of the profile during the bauxitization process. On the other hand, it became evident that only a small part of the bauxitic residual zirconium is tied to zircon. Most of it is associated with the bauxitic ferruginous phase as colloidal hydroxides mixtures.

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“…La roche mère est considérée comme homogène et l'élément invariant choisi est le titane. Plusieurs études montrent, cependant, que cet élément est susceptible de migrer [6,20], tout comme le zirconium [11,16]. Les calculs iso-titane et iso-zirconium donnent des résultats très voisins pour les sols jeunes de bas de versant [19].…”
Section: Bilans De Masseunclassified
“…La roche mère est considérée comme homogène et l'élément invariant choisi est le titane. Plusieurs études montrent, cependant, que cet élément est susceptible de migrer [6,20], tout comme le zirconium [11,16]. Les calculs iso-titane et iso-zirconium donnent des résultats très voisins pour les sols jeunes de bas de versant [19].…”
Section: Bilans De Masseunclassified