Record details

    The use of mantle normalization and metal ratios in the identification of the sources of platinum-group elements in various metal-rich black shales
Statement of responsibility
    Jan Pašava, Sarah-Jane Barnes, Anna Vymazalová
    Barnes, Sarah-Jane
    Pašava, Jan
    Vymazalová, Anna
Source title - serial
    Mineralium Deposita
    Vol. 38, no. 6
    p. 775-783
    3 obr., 4 tab., 2 s. bibl.
    Zkr. název ser.: Mineralium Depos. (Berlin).
Subject group
    břidlice černá
    kovonosná černá břidlice
    kovy skupiny platiny
    ložisko typu Kupferschiefer
    rudy barevných kovů
    zdroje zrudnění
Geographical name
    Čína jižní
Abstract (in english)
   It has been shown that Ni/Cu versus Pd/Ir and Cu/Ir versus Ni/Pd ratios, as well as mantle-normalized metal patterns can be successfully used to evaluate the effects of partial melting, crystal fractionation and sulfide saturation in mafic and ultramafic rocks. Platinum-group element (PGE) enrichments occur in Zn-, Cu- and Ni-rich black shales in a number of geological settings. These facies are generally associated with the development of continental rift structures, both without significant volcanic activity (examples in Canada, China, Finland and Poland) and with volcanic activity (Czech Republic and Namibia). Using the same element ratios as were used in mafic igneous rocks, it is evident that metal-rich black shales associated with volcanic rocks reflect the fractionation of PGEs in volcanogenic facies.
   It is further concluded that, in metal-rich black shales in which distributions of Ni and Cu have been altered by various processes, the Cu/Ir versus Ni/Pd and Ni/Cu versus Pd/Ir ratios plots are applicable for determination of the source of PGEs only after careful evaluation of Ni and Cu enrichments
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    21. 3. 2008
Import date
    8. 8. 2012