Lateritic Bauxites

Contents

1. Introduction. 2. Definitions. Why are definitions important? List of definitions and abbreviations. 3. Laterites and Lateritic Weathering. Historical review of laterite research. The typical laterite profile. Classification and nomenclature of laterites. Structures, textures and other descriptive features. Mineralogical, physico-chemical and thermodynamic aspects of lateritic weathering. Genetic ideas based on field geology. Economic aspects of laterites and lateritic ores. 4. Classification of Bauxite Deposits. Review and comparison of existing classifications. The world distribution of bauxite deposits. The IBA classification of commercial bauxite. 5. Main Characteristics of Lateritic Bauxite Deposits. Externally controlled characteristics. Climate conditions. Vegetation cover. Geomorphology. Hydrogeologic conditions. Stratigraphic position and burial. Tectonic position. Parent rocks. Internal features. Extent and geometry of deposits. Vertical constitution. Lithology of deposits. Chemical composition and geochemistry. Mineralogical composition. 6. Origin of Lateritic Bauxite Deposits. Historical review. Bauxitization processes. Secondary, post-bauxitization processes. The formation of bauxite and laterite during the Earth's history. 7. Systematic Descriptions of Selected Lateritic-Bauxite Deposits. Objectives and standard format of the descriptions. The selection of the deposits chosen for description. The South American Platform Province. The Southeast Brazil Province. The West African Bauxite Province. The Southeast African Province. The Indian Bauxite Province. The North and West Australian Province. The Southeast Australian Bauxite Province. Isolated bauxite districts. 8. Bauxite as Ore for Aluminium. Introduction. General aspects. Review of bauxite-processing technology. The effect of bauxite composition on its processing to alumina. Special grades of bauxite. Prospecting grades of bauxite. Prospecting for and exploration of lateritic-bauxite deposits. Methods employed. The regional approach. The detailed approach. Sampling. Analytical methods. Description of the methods. Application during exploration. Normative compositions of bauxite. Beneficiation and technical testing. Tonning and grade estimation. Resource estimation. Reserve estimation. Feasibility report. Mining and annual reporting. Review of world bauxite resources and mining. 9. Conclusions. Glossary. References. Index of Names. Localities. Subject Index.

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