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  • Recent sediment of Lake Bled (NW Slovenia): sedimentological and geochemical properties
    Ogorelec, Bojan ...
    Sediment cores collected in eutrophic subalpine Lake Bled (NW Slovenia) were analyzed sedimentologically in terms of grain size, mineralogy and sedimentation rates, and geochemically in terms of ... metals and nutrients. Surficial sediment is composed of dark gyttya type clayey silt with 5%-10% of organic matter. The sediment below is fine laminated and composed of homogenous silt and clayey silt: Mineralogically, low-Mg calcite prevails, followed by dolomite, quartz, partially of diatomaceous origin, and feldspar. Clay minerals are composed of muscovite/illite and chlorite. Authigenic minerals are pyrite and 'lake chalk' (low-Mg calcite). Lake sediment is especially polluted by Pb, Zn and P. Higher contents were found in the northwestern and eastern parts due to the particle input bz local inflows. Increasing eutrophication and pollution, indicated by Cd, Cu, V, Cr, Co and total N and P enrichment in the top layers of the cores, started almost 100 years B.P., and especially 50 years ago.
    Source: Water, air & soil pollution. Focus.. - ISSN 1567-7230 (Vol. 6, no. 5/6, 2006, str. 505-513)
    Type of material - article, component part
    Publish date - 2006
    Language - english
    COBISS.SI-ID - 1330005