Podrobnosti záznamu

Název
    Lithium in tektites and impact glasses: Implications for sources, histories and large impacts
Autor
    Adolph, Leonie
    Deutsch, Alexander
    Magna, Tomáš
    Mezger, Klaus
    Mizera, Jiří
    Řanda, Zdeněk
    Seitz, Hans-Michael
    Skála, Roman
Jazyk
    anglicky
Typ dokumentu
    článek v periodiku
Zdrojový dokument - seriál
    Geochimica et Cosmochimica Acta
Svazek/č.
    Roč. 75, č. 8
Strany
    22
Rok
    2011
Výraz tezauru
    lithium isotopes,tektites,impact glasses,lithophile elements,high-temperature isotope fractionation,Ries crater,precursor, meteorites
Klíčové slovo
    Glasses
    Histories
    Impact
    Impacts
    Implications
    Large
    Lithium
    Sources
    Tektites
Abstrakt (anglicky)
   Lithium (Li) abundances and isotope compositions were determined in a representative suite of tektites, impact-related glasses, a glass fragment embedded in the suevite from the Ries impact crater and sedimentary materials in order to test a possible susceptibility of Li to fractionation during hypervelocity impact events and to deconvolve links to their potential parental sources. The overall data show a large spread in Li abundance (4.7-58 ppm Li) and d7Li values (-3.2 to 26.0?) but individual groups have distinctive Li compositions. Extreme shock pressures and the related extreme post-shock temperatures alone appear not to have any effect on the Li isotope systematics; therefore, useful information on parental lithologies and magmatic processes may be retrieved from analyses of Martian and lunar meteorites. Moreover, lack of significant Li depletion in tektites provides further constraints on the loss of volatile and moderately volatile elements during the Moon-forming impact.
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (RIV)
Zdrojový formát
    R
Datum importu
    15. 10. 2014