Podrobnosti záznamu

Název
    Large-scale erosion rates from in situ-produced cosmogenic nuclides in European river sediments
Údaj o odpovědnosti
    M. Schaller, F. Blanckenburg, N. Hovius, P.M. Kubik
Autor
    Blanckenburg, F.
    Hovius, N.
    Kubik, P. M.
    Schaller, M.
Jazyk
    anglicky
Zdrojový dokument - seriál
    Earth and planetary science letters
Svazek/č.
    Vol. 188, no. 3-4
Strany
    p. 441-458
Rok
    2001
Poznámky
    5 obr., 4 tab., 52 bibl.
    il.
    Zkr. název ser.: Earth planet. Sci. Lett.
Předmětová skupina
    berylium
    holocén
    izotopy Be
    izotopy radioaktivní
    křemen
    pleistocén-svrchní
    povodí
    prvky kosmogenní
    rychlost eroze
    sedimentace fluviální
    výzdvih klenbový
    zvětrávání
Geografické jméno
    Belgie
    ČR-Čechy
    Francie
    Nizozemsko
    SRN
    Šumava
Klíčové slovo
    Cosmogenic
    Erosion
    European
    Large-scale
    Nuclides
    Rates
    River
    Sediments
    Situ-produced
Abstrakt (anglicky)
   We have calculated long-term erosion rates of 20-100 mm/kyr from quartz-contained 10Be in the bedload of middle European rivers for catchments ranging from 102 to 10 5 km2. These rates average over 10-40 kyr and agree broadly with rock uplift, incision and exhumation rates, historic soil erosion rates, and erosion rates calculated from the measured sediment loads of the same rivers. Moreover, our new erosion rate estimates correlate well lithology and relief. However, in the Regen, Neckar, Loire, and Meuse catchments, cosmogenic nuclide-derived erosion rates are consistently 1.5-4 times greater than the equivalent rates derived from measured river loads. This may be due to the systematic under-representation of high-magnitude, low-frequency transport events in the gauging records which cover tapping of deeper sections of the irradiation profile.
   A third explanation relates the high cosmogenic nuclide-derived erosion rate estimates are not greater than the potential errors in conventional estimates. Therefore, the cosmogenic nuclide approach is an effective tool for rapid, catchment-wide assessmnet of time-intergrated rates of bedrock weathering and erosion, and we anticipate its fruitful application to the Quaternary sedimentary record
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    23. 8. 2007
Datum importu
    8. 8. 2012