Record details

Title
    Lithium in tektites and impact glasses: Implications for sources, histories and large impacts
Author
    Adolph, Leonie
    Deutsch, Alexander
    Magna, Tomáš
    Mezger, Klaus
    Mizera, Jiří
    Řanda, Zdeněk
    Seitz, Hans-Michael
    Skála, Roman
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Geochimica et Cosmochimica Acta
Vol./nr.
    Roč. 75, č. 8
Pages
    22
Year
    2011
Thesaurus term
    lithium isotopes,tektites,impact glasses,lithophile elements,high-temperature isotope fractionation,Ries crater,precursor, meteorites
Keyword
    Glasses
    Histories
    Impact
    Impacts
    Implications
    Large
    Lithium
    Sources
    Tektites
Abstract (in english)
   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.
Contributor
    Česká geologická služba
Contributor code
    ČGS (RIV)
Source format
    R
Import date
    15. 10. 2014