Bauxite provinces of the world |
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Authors: | B A Bogatyrev V V Zhukov |
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Institution: | 1.Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry,Russian Academy of Sciences,Moscow,Russia |
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Abstract: | Phanerozoic bauxite provinces are contoured and characterized. The relations to large tectonic units—ancient and young platforms,
island arcs and foldbelts, active continental margins, etc.—are chosen as the major criterion for the recognition of bauxite
provinces; 19 provinces of different age and conditions of bauxite deposition are described. Single- and multistage as well
as single- and multilevel provinces are distinguished depending on the type of tectonic and geomorphic structure. The most
productive bauxite provinces are located in the present-day tropical zone within ancient Gondwanan platforms. Three-level
provinces with Cretaceous bauxite at the highest and oldest (post-Gondwanan) surface and Cenozoic deposits at lower and younger
planation surfaces are predominant. The most complex, two- and three-stage and multilevel provinces are related to ancient
fold regions. The single-level provinces are localized in young island arcs and oceanic islands. The prevalent genetic types
of bauxite deposits—lateritic, sedimentary, and karst—are shown in the map of bauxite provinces. |
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