On s’accorde aujourd’hui d’une façon assez générale pour reconnaître que la bauxite ou minerai d’aluminium représente le produit d’altération atmosphérique ultime de roches alumineuses très diverses.
C est donc une matière résiduelle, conservée sur des surfaces continentales, formée dans des régions où les conditions climatiques sont particulièrement favorables et dont le relief est peu accidenté.

The carstic bauxite deposits of the western flange of the Turgai trough are investigated in geological, petrological, mineralogical, and morphological aspects, as well as to the chemical composition. Special attention was paid to the so-called »beans«, inclusions in the cement of the stony bauxites of that region. These beans have an average diameter from 2 to 20 mm, greater ones are rare, and so are varieties smaller than 1 mm. Structurally, they consist of a gray ferrum-alumi-nium core around which a black coating of alumina-ferruginous matter is wrapped.
The inner composition of the beans was examined very carefully in every respect, and on that base some new suggestions about their genesis was put forward.

Water supply is critical for ensuring optimal operation of any beneficiation plant. As ore quality continues to decline, the demand on water for mineral processing will only increase. Traditionally, ground and surface water sources have been extensively utilized for mining and beneficiation. In some regions, these sources are proving to be insufficient to meet the increasing demands of this industry, as well as the local municipal requirements. As a result, alternate water supplies must be considered. The purpose of this investigation was to develop a collector that allows for the flotation of phosphate in sea water, while still meeting the grade (>27.5% P2O5) and recovery (>80%) criteria. <...>

The use of computers as primary tools for carrying out geological research and databases for storing geological information has grown considerably in recent years. In the same period there has been a dramatic increase in the degree of collaboration between scientific institutions, universities and industry, and between geologists working in different countries. To facilitate collaborative work amongst geologists and to maximise efficiency in the use of geological databases a common approach to classifying and naming rocks is essential. This publication presents a scheme for the classification and nomenclature of igneous rocks that is practical, logical, systematic, hierarchical and uses clearly defined, unambiguous rock names.