DIMENSIONAL EFFECT AND CRYSTALLOMORPHOLOGICAL FEATURES OF GIBBSITE IN THE BAUXITE-BEARING WEATHERING CRUST

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Abstract

Using the example of the Central Chadobets uplift deposit, the relationship of the crystallomorphological features of gibbsite with its position in the bauxite-bearing profile of the weathering crust is revealed. From the down up, in various parts of the profile, as a result of infiltration metasomatosis and various physico-chemical conditions, there is an increase in free space, contributing to the growth of gibbsite crystals. The higher the rock lies, the more porous it is. Thus, in the down-up section, the size of gibbsite crystals increases, its morphology becomes more complicated. By the method of thermal analysis, it was found that the larger the size of the gibbsite crystals, the more boehmite is formed when it is heated. These conclusions will help technologists to choose the most rational scheme for processing bauxite.

About the authors

N. M. Boeva

Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of the Russian Academy of Sciences

Author for correspondence.
Email: boeva@igem.ru
Russia, Moscow

N. S. Bortnikov

Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of the Russian Academy of Sciences

Email: boeva@igem.ru
Russia, Moscow

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