Record details

    Effects of melt percolation on highly siderophile elements and Os isotopes in subcontinental lithospheric mantle: A study of the upper mantle profile beneath Central Europe
    Ackerman, Lukáš
    Jelínek, E.
    Pitcher, L.
    Puchtel, I. S.
    Strnad, L.
    Walker, R. J.
Publication type
    článek v odborném periodiku
Source title - serial
    Geochimica et Cosmochimica Acta
    Roč. 73, č. 8
    s. 2400-2414
    Projekt: IAA3013403, GA AV ČR
    Projekt: KJB300130612, GA AV ČR
    Rozsah: 15 s. : WWW
    Výzkumný záměr: CEZ:AV0Z30130516
Subject category
    melt-rock reaction
Abstract (in english)
   This study is focused on effects of mantle percolation on HSE distribution and Re-Os isotopic systematics of upper mantle rocks brought to the surface during 5 Ma years old eruption of Kozákov volcano (Northern Bohemia). The Os-Ir-Ru-Pd distribution in these rocks shows significant depletions which are the result of the melt-rock interactions. In contrast, Pt contents are commonly elevated and these enrichments are coupled with increasing melt/rock ratios. Osmium isotopic ratios are lower then chondrite meteorites and their strongly heterogeneous values reflect also melt-rock reactions. All these results imply almost sulphide-breakdown in the lower sections of the mantle profile. On contrary, the middle and upper parts of the profile show only limited HSE removal. Moreover, HSE were most likely even precipitated from percolating melt in some cases.
    AV ČR Brno, Geologický ústav
Contributor code
    AV ČR, GLÚ
Source format
Import date
    8. 8. 2012