1. Department of Soil Science and Soil Protection,
Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 165 21 Praha 6, Czech Republic
2. Institute of Geochemistry, Mineralogy and Mineral Resources, Faculty
of Science, Charles University in Prague, Albertov 6, 128 43 Praha 2, Czech Republic
3. Department of Economic Geology, Faculty of Earth Sciences, University of Silesia, Bedzinska 60, Sosnowiec 41-200, Poland
4. Institute of Geology of the CAS, v.v.i., Rozvojová 269, 165 00 Praha 6, Czech Republic