Podrobnosti záznamu

    The effect of geochemical evolution of AMD on mineral composition of stream sediments: preliminary study on Hadůvka stream, West-ern Moravia, Czech Republic.
    Filip, Jan
    Zeman, Josef
Typ dokumentu
    článek ve sborníku
Zdrojový dokument - monografie
    Applied Environmental Geology in Central and Eastern Europe
    Akce: 2003 ; Wien
Výraz tezauru
    acid mine drainage
    bottom sediment
    secondary minerals
Klíčové slovo
Abstrakt (anglicky)
   Results from X-ray diffraction have showed that all recently formed minerals are amorphous, nearly amorphous (without regular crystal lattice) or cryptocrystalline and occur in mixture of several phases. Thus this method seems to be unsuitable for characterization of such fresh sediments. Modelling made with the aid of The Geochemists Workbench suggested hypo-thetical presence of goethite, pyrolusite, calcite and kaoline. Coupled with sequential and silicate analyses, this hypothetical minerals have been taken as normative for further evalua-tion of bottom sediments. Natural Hadůvka stream sediments are characterized by low con-tent of Fe- and Mn-oxyhydroxides (3 to 4 %) and carbonates (0.X %). Inflow of AMD into the stream causes rapid rising of insoluble HFO (20 to 30 %), carbonates (20 to 30 %) and clay minerals (5 to 10 %) content, but maximum of carbonates is slightly later than that of HFO.
    MU Brno, Přírodovědecká fakulta
Kód přispěvatele
    MU, PřF
Zdrojový formát
Datum importu
    8. 8. 2012