Chemismus hornin macošského a líšeňského souvrství ve velkolomu Mokrá (Moravský kras)Článek v PDF
Chemistry of rocks of the Macocha and Líšeň Formations in the Mokrá Quarry (Moravian Karst)
The quality of cement clinker is related to the chemistry of the raw materials (typically limestone and clay or shale and other materials) used. The paper provides detailed information about chemistry of rocks of the Macocha and Líšeň Formations quarried as raw materials for cement production in Mokrá in the southern part of the Moravian Karst (north of the town of Brno). The Vilémovice Limestones is the only lithostratigraphic member of the Macocha Formation in the Mokrá Quarry. Massive Vilémovice limestones are very pure with only 1.5 wt. % SiO2 and 0.4 wt. % Al2O3 on average. A nodular variety of Vilémovice limestones has increased contents of SiO2 (3.3 wt. % on average), Al2O3 (1.5 wt. %) and also alkalies, represented mainly potassium (0.3 wt. % K2O). Rocks of the Líšeň Formation are composed of a carbonate component (calcite) and a non-carbonate component (dominantly quartz and muscovite / illite), whose quantitative ratio is highly variable Limestone of the Líšeň Formation (sometimes very pure) pass into calcareous shale due to increase in non-carbonate component and then into silty shale containing only a few percent of calcite. This corresponds to the wide variability of CaO, SiO2, Al2O3 and alkalies (K > Na). The K2O content in shales of the lithostratigraphic member Hády-Říčka Limestones is in the range of 2.3 to 4.4 wt. % (3.3 wt. K2O on average). In the article are presented and discussed the contents of a series of minor and trace elements (P, Ti, S, Fe, Mn, Sr, Rb, Zr, As, Cu, Zn, Pb and REE).
Jiří Zimák: Department of Geology, Faculty of Science, Palacký University, 17. listopadu 12, 771 46 Olomouc; e-mail: firstname.lastname@example.org
Jindřich Štelcl: Institute of Geological Sciences, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic; Department of Biology, Faculty of Education, Masaryk University, Poříčí 7, 603 00 Brno, Czech Republic; e-mail: email@example.com
Kristýna Dalajková: Department of Geology, Faculty of Science, Palacký University, 17. listopadu 12, 771 46 Olomouc; e-mail: firstname.lastname@example.org
Jan Donocik: Austin Powder Service CZ s.r.o., Jasenice 712, 755 01 Vsetín, Czech Republic; e-mail: email@example.com
Lenka Kopecká: URGA, s.r.o., Holická 31A, 772 00 Olomouc; e-mail: firstname.lastname@example.org