Wyniki badań mineralogicznych iłołupków łęczyckich

Abstract

RESULTS OF MINERALOGICAL EXAMINATIONS OF ŁĘCZYCA SHALES

Summary

Mineral composition of Vesoulian clays and their grain fractions, found to occur at the top of clay siderite layer, have been determined by X-ray (Fig. 1), thermal, microscope and chemical methods. The following minerals have been distinguished: illite, kaolinite, quartz, muscovite, minerals characterized by mixed illite-chlorite or illite-montmorillonite textures, calcite, pyrite, microcline, phosphorite, siderite, as well as rutile, tourmaline and zircon. The author suggests a method of converting the chemical composition into mineral composition, in which all components determined by phase methods would be taken into account, except for microcline, tourmaline and zircon only. The calculation of chemical analyses has been compared in Table 2 with the results of semi-quantitative determinations made using X~ray and microscope methods. It results from the examination that any quantitative mineralogical research of clay shales that accompany siderite iron ores require a set of complex methods.