Record details

Title
    The effect of geochemical evolution of AMD on mineral composition of stream sediments: preliminary study on Hadůvka stream, West-ern Moravia, Czech Republic.
Author
    Filip, Jan
    Zeman, Josef
Language
    anglicky
Publication type
    článek ve sborníku
Source title - monograph
    Applied Environmental Geology in Central and Eastern Europe
Pages
    2
Notes
    Akce: 2003 ; Wien
Thesaurus term
    acid mine drainage
    bottom sediment
    secondary minerals
Keyword
    AMD
    Composition
    Czech
    Effect
    Evolution
    Geochemical
    Hadůvka
    Mineral
    Moravia
    Preliminary
    Republic
    Sediments
    Stream
    Study
    West-ern
Abstract (in english)
   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.
Contributor
    MU Brno, Přírodovědecká fakulta
Contributor code
    MU, PřF
Source format
    R
Import date
    8. 8. 2012