Record details

Title
    Rare metal sequestration and mobility in mineralized black shales from the Zunyi region, South China
Other titles
    Rare metal sequestration and mobility in mineralized black shales from the Zunyi region, South China
Author
    Orberger, Beate
    Pašava, Jan
    Vymazalová, Anna
    Wagner, Cristine
Language
    anglicky
Publication type
    článek ve sborníku
Source title - monograph
    Mineral Deposits Research: Meeting the Global Challenge
Notes
    Akce: 2005/08/18 ; Beijing, China
Thesaurus term
    Black shales, Cambrian, rare metal mineralization, Mo, Se, As, Ni, organic carbon, phosphates
Keyword
    Black
    China
    Metal
    Mineralized
    Mobility
    Rare
    Region
    Sequestration
    Shales
    South
    Zunyi
Abstract (in czech)
   The micromineralogical and chemical study of two black mineralized shales from the Zunyi region show that they experienced a low diagenetic degree still preserving microbial phosphate and sulfides and poorly crystallized phases composed of metals or Al and Si. The two shales differ in diagenetic vein mineralogy. CH11 is carbonate rich whereas CH25 is sulfate rich. As CH11 is twice enriched in the redox sensitive elements Ni, Se, As, Mo, Sb, U, Zn, Pb, Cd, a remobilization by CO2 (may be derived from organic matter oxidation) rich fluids is suggested. Seawater characteristic REE element patterns, but Se/S-ratio typical for a volcanogenic environment, favor a fluid mixture during early diagenesis.
Abstract (in english)
   The micromineralogical and chemical study of two black mineralized shales from the Zunyi region show that they experienced a low diagenetic degree still preserving microbial phosphate and sulfides and poorly crystallized phases composed of metals or Al and Si. The two shales differ in diagenetic vein mineralogy. CH11 is carbonate rich whereas CH25 is sulfate rich. As CH11 is twice enriched in the redox sensitive elements Ni, Se, As, Mo, Sb, U, Zn, Pb, Cd, a remobilization by CO2 (may be derived from organic matter oxidation) rich fluids is suggested. Seawater characteristic REE element patterns, but Se/S-ratio typical for a volcanogenic environment, favor a fluid mixture during early diagenesis.
Contributor
    Česká geologická služba
Contributor code
    ČGS (RIV)
Source format
    R
Import date
    15. 10. 2014