Record details

Title
    Depositional rates and dating techniques of modern deposits in the Brno reservoir (Czech Republic) during the last 70 years
Author
    Franců, Eva
    Kirchner, Gerald
    Nehyba, Slavomír
    Nývlt, Daniel
    Schkade, Uwe
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Journal of Paleolimnology
Vol./nr.
    Roč. 45, č. 1
Pages
    15
Year
    2011
Thesaurus term
    Reservoir deposits, Radiometric dating, Depositional rate, Hydrological changes, Human impact
Keyword
    70
    Brno
    Czech
    Dating
    Depositional
    Deposits
    During
    Last
    Modern
    Rates
    Republic
    Reservoir
    Techniques
    Years
Abstract (in english)
   Facies analysis, magnetic susceptibility, and analysis of grain size, TOC content and isotopes were used to determine the history of the modern deposits of the Brno reservoir. The sedimentary succession can be subdivided into two main units. The lower unit is formed predominantly by medium to coarse-grained silty sands and is interpreted as a fluvial succession deposited before the Svratka River was dammed. The upper unit consists of brownish planar laminated silts and rarely of clayey or sandy silts and is interpreted as a product of the reservoir deposition. The concentrations of 238U reflect the history of uranium mining in the upper part of the Svratka River catchment. Concentrations of 137Cs show two marked peaks, the upper corresponds to the year 1986, and the lower one to the year 1963. The mean depositional rate for the time period of 1939-1963 is 3.1 cm year-1; 3.4 cm year-1 between 1963 and 1986 and 3.2 cm year-1 for the time period of 1986-2007.
Contributor
    Česká geologická služba
Contributor code
    ČGS (RIV)
Source format
    R
Import date
    15. 10. 2014