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Mineralogical and crystal-chemical characterization of the talc ore deposit of Minzanzala, Gabon

Published online by Cambridge University Press:  20 June 2019

Mathilde Poirier Open the ORCID record for Mathilde Poirier [Opens in a new window] ,
Jean-Eudes Boulingui ,
François Martin ,
Michel Mbina Mounguengui ,
Charles Nkoumbou ,
Fabien Thomas ,
Michel Cathelineau  and
Jacques Yvon
Mathilde Poirier*
Affiliation:
Laboratoire Géosciences Environnement Toulouse UMR 5563, UPS-CNRS-IRD-CNES, ERT 1074 ‘Géomatériaux’, 14 Avenue Edouard Belin, 31400 Toulouse, France
Jean-Eudes Boulingui
Affiliation:
Laboratoire des Sciences de la Vie et de la Terre, Ecole Normale Supérieure, B.P. 17009 Libreville, Gabon Laboratoire Interdisciplinaire des Environnements Continentaux UMR CNRS7360, Université de Lorraine, 15 Avenue du Charmois, B.P. 40, 54501 Vandoeuvre-lès-Nancy, France
François Martin
Affiliation:
Laboratoire Géosciences Environnement Toulouse UMR 5563, UPS-CNRS-IRD-CNES, ERT 1074 ‘Géomatériaux’, 14 Avenue Edouard Belin, 31400 Toulouse, France
Michel Mbina Mounguengui
Affiliation:
Faculté des Sciences de l'Université des Sciences et Techniques de Masuku, USTM B.P. 943 Franceville, Gabon
Charles Nkoumbou
Affiliation:
Département des Sciences de la Terre, Université de Yaoundé I, Faculté des Sciences, B.P. 812 Yaoundé, Cameroon
Fabien Thomas
Affiliation:
Laboratoire Interdisciplinaire des Environnements Continentaux UMR CNRS7360, Université de Lorraine, 15 Avenue du Charmois, B.P. 40, 54501 Vandoeuvre-lès-Nancy, France
Michel Cathelineau
Affiliation:
Laboratoire GeoRessources UMR CNRS7359, Université de Lorraine, Rue du Doyen Roubault B.P. 40, 54501 Vandoeuvre-lès-Nancy, France
Jacques Yvon
Affiliation:
Département des Sciences de la Terre, Université de Yaoundé I, Faculté des Sciences, B.P. 812 Yaoundé, Cameroon
*
*E-mail: [email protected]
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Abstract

This research aims to characterize the mineralogical and crystal-chemical purity of two samples of natural talc (BTT6, BTT7) from the occurrence ‘Ecole1’ in the deposit of Minzanzala, southwest Gabon. X-ray diffraction and modal-composition calculations demonstrated the presence of quartz and Al–Fe-bearing phases (kaolinite and/or chlorite and/or Al–Fe oxyhydroxides) as accessory minerals in both ores. In contrast, the chemical and spectroscopic characterization of the talc component revealed remarkable chemical purity expressed by very low Fe contents. According to these results, the talc of Minzanzala might be used as a filler in a wide range of industrial applications, such as in cosmetics, paints, polymers or ceramics.

Keywords

crystal-chemistryGabonmineralogytalcTchibanga
Type
Article
Information
Clay Minerals , Volume 54 , Issue 3 , September 2019 , pp. 245 - 254
Copyright
Copyright © Mineralogical Society of Great Britain and Ireland 2019 

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Footnotes

Associate Editor: Lawrence Warr

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