Physicochemical properties of talc ore from Pout-Kelle and Memel deposits (central Cameroon)
| Autor: | Manuel Pelletier, Jacques Yvon, V. Metang, C. Yonta Ngouné, Angelina Razafitianamaharavo, Isabelle Bihannic, Daniel Njopwouo, Charles Nkoumbou, Odile Barres, Frédéric Villiéras |
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| Rok vydání: | 2008 |
| Předmět: |
Mineral
Brucite Beneficiation Mineralogy 020101 civil engineering 02 engineering and technology engineering.material 010502 geochemistry & geophysics Talc 01 natural sciences Halloysite 0201 civil engineering chemistry.chemical_compound chemistry Geochemistry and Petrology engineering medicine Chromite Clay minerals Geology 0105 earth and related environmental sciences Magnesite medicine.drug |
| Zdroj: | Clay Minerals. 43:317-337 |
| ISSN: | 1471-8030 0009-8558 |
| Popis: | Physicochemical properties of representative samples from talc deposits discovered at Pout-Kelle and Memel in Cameroon have been investigated using a variety of techniques. The data allow the study of the mineral crystal-chemistry, chemical and modal compositions, grain size distribution, textures and surface heterogeneity, and morphometric characteristics. As a result, we found that talc (platy or round, Fe-rich) prevails (65–90%) over Cr-chlorite (7–26%), halloysite, chromite, rutile, brucite and magnesite. Chemically, talc ores are made up of SiO2, MgO, Fe2O3 and minor Al2O3. Mode values range from 50 to 55 μm at Memel and from 30 to 90 μm at Pout-Kelle. Specific surface areas measured by BET and t-plot methods range from 1.3 to 2.5 m2/g. The large values of morphometric characteristics are indicative of high crystallinity and platiness. Potential uses of these talc ores in the rubber, plastics and paper industries require beneficiation processes. Interestingly, the Memel deposit and most zones of the Pout-Kelle deposit are free of needle-shaped crystals, an advantage for environmental safety. |
| Databáze: | OpenAIRE |
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