Major and trace element geochemistry of the European Kupferschiefer — an evaluation of analytical techniques
Posted on 2018-02-26 - 13:11
Simple and rapid techniques are needed for routine quantitative chemical bulk-rock analyses of Kupferschiefer, a
black shale containing variable amounts of silicates, base metal sulphides, carbonates and an organic content of up to 30 weight
percent. In this study, WD-XRF, TXRF, and ICP-OES of acid- as well as peroxide-digested samples were tested as potential
techniques based on their availability and adaptability to analyse major (Si, Ti, Al, Mg, Ca, Fe, K, but also Cu, Zn, Pb) and
selected trace (Ag, As, Ba, Co, Mo, Ni, V) element concentrations. Because of the absence of a suitable reference material, a
comparative study was undertaken using instrumental neutron activation analysis to ascertain the accuracy of different
approaches. Our results suggest that data fromICP-OESwere much higher in accuracy compared to INAA than those from WDXRF
and TXRF, independent of the digestion procedure. The choice of digestion procedure is reflected in low detection limits
but an underestimation of Cu, Ag, Co, and V concentrations reported by ICP-OES relative to those obtained by INAA in the
case of acid digestion and increased detection limits coupled with a loss of over 25% Ag relative to INAA for peroxide
digestion.
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Rahfeld, Anne; Wiehl, Norbert; Dressler, Sandra; Möckel, Robert; Gutzmer, Jens (2018). Major and trace element geochemistry of the European Kupferschiefer — an evaluation of analytical techniques. Geological Society of London. Collection. https://doi.org/10.6084/m9.figshare.c.4015507.v1
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AUTHORS (5)
AR
Anne Rahfeld
NW
Norbert Wiehl
SD
Sandra Dressler
RM
Robert Möckel
JG
Jens Gutzmer