Record details

Title
    The use of mantle normalization and metal ratios in the identification of the sources of platinum-group elements in various metal-rich black shales
Other titles
    The use of mantle normalization and metal ratios in the identification of the sources of platinum-group elements in various metal-rich black shales
Author
    Barnes, S-J.
    Pašava, Jan
    Vymazalová, Anna
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Mineralium Deposita
Vol./nr.
    Roč. 38, č. 6
Pages
    9
Year
    2003
Thesaurus term
    metal-rich black shale, mantle normalization, metal ratios, source of PGEs
Keyword
    Black
    Elements
    Identification
    Mantle
    Metal
    Metal-rich
    Normalization
    Platinum-group
    Ratios
    Shales
    Sources
    Use
    Various
Abstract (in czech)
   It was previously shown that Pd/Ir versus Ni/Cu and Ni/Cu versus Cu/Ir ratios, as well as mantle normalized metal patterns, can be successfully used for the evaluation of the effects of partial melting, crystal fractionation and sulfide saturation in mafic and ultramafic rocks (Naldrett and Barnes 1986). PGEs enrichments have been recently found in Zn-, Cu-, and Ni-rich black shales in a number of geological settings. The application of using the same elemental ratios to PGE-metal-rich black shales showed that black shales associated with volcanic rocks reflect the fractionation of PGEs in volcanogenic facies. It was further concluded that, in metal-rich black shales in which distributions of Ni and Cu have been altered by various processes, the Pd/Ir versus Ni/Cu and Ni/Cu versus Cu/Ir ratios plots are applicable for determination of the source of PGEs only after careful evaluation of Ni and Cu enrichments.
Abstract (in english)
   It was previously shown that Pd/Ir versus Ni/Cu and Ni/Cu versus Cu/Ir ratios, as well as mantle normalized metal patterns, can be successfully used for the evaluation of the effects of partial melting, crystal fractionation and sulfide saturation in mafic and ultramafic rocks (Naldrett and Barnes 1986). PGEs enrichments have been recently found in Zn-, Cu-, and Ni-rich black shales in a number of geological settings. The application of using the same elemental ratios to PGE-metal-rich black shales showed that black shales associated with volcanic rocks reflect the fractionation of PGEs in volcanogenic facies. It was further concluded that, in metal-rich black shales in which distributions of Ni and Cu have been altered by various processes, the Pd/Ir versus Ni/Cu and Ni/Cu versus Cu/Ir ratios plots are applicable for determination of the source of PGEs only after careful evaluation of Ni and Cu enrichments.
Contributor
    Česká geologická služba
Contributor code
    ČGS (RIV)
Source format
    R
Import date
    15. 10. 2014