Mineral Preparation in Geological Research

Abstract

Paper deals with discussion of minerals’ preparation requiring high purity monoproducts, this has special importance for minerals –geochronometers. Widely used methods including gravitation, magnetic separation, floatation provide fractions with 90% of targeted mineral. Further monominerality increase requires special separation methods; one of them – “Strat” is perspective. It is based on separation in organic liquids under gradual density change. Combination of bromoform with d – 2.89 g/sm3 and dimethyle formamide with d – 0.8 g/sm3 is used; density gradations till 0.001 g/sm3 are possible therefore isomorphic inclusions could be separated. Another direction is presented by trybotreatments under higher energies in planetary mills with a centrifugal factor to 40–50 g. Exotic surface substances presented mainly by kaolinite, muscovite, calcite, gothite are removed as trybotreatment result. Special planetary mills - classifiers are used for processing of big samples. This method together with minerals opening in disintegrator under destruction by the free pulse is recommended for wide application.