Record details

    Weathering effects on the agrochemical properties of rocks deposited in coal-mine spoil banks, tips and quarry dumpings
Statement of responsibility
    Bohdan Kříbek, Hana Macurová
    Kříbek, Bohdan, 1946-
    Macurová, Hana
Source title - monograph
    Weathering of Fossil Organic Matter
    s. 97-106
    4 obr., 1 tab., 10 bibl.
Subject group
    břidlice černá
    břidlice vápnitá
    iontová výměna
    odpad průmyslový
    plzeňská pánev
    pražská pánev
    sokolovská pánev
    uhlík organický
Geographical name
Abstract (in english)
   Effects of weathering on the agrochemical properties of rocks deposited (1) in spoil banks of brown-coal mines in the Sokolov Basin, (2) in tips of the black-coal mines in the Plzeň Basin and (3) in the dumping left from the quarring of Silurian shales in Beroun Area were studied. The pH values of the rocks generally decrease with the intensity of weathering. The exception are the clays and claystones of the Cypris Formation (Sokolov Basin) and the calcarous shales from Beroun Area, where acid-base equilibria are buffred by a sufficient amount of carbonate. The cation exchange capacity (CEC) values increase with increased weathering. The considerable variation in the CEC values of the weathered Cypris claystones is affected by the presence of carbonate cement in the rock and by the presence of montmorillonite. The available K, Mg and Ca contents vary greatly in weathered rocks and are apparently determined primarily by the lithological character of the sample.
   All the weathered rocks are characterized by a marked deficit of available phosphorus. Their C/N ratios decrease during weathering, indicating gradual development of bacterial action. A C/N value of 10 (which is typical for humus in arable soils) is attained in spoil banks consisting of Cypris Formation clays and claystones after 35 years, and in the aurry dumprings around Beroun after 50 years. The C/N values decrease more slowly in the coal and coal sediments from Sokolov and Plzeň Basins
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    29. 10. 2007
Import date
    8. 8. 2012