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Elementverteilung im Liegenden des Kupferschiefers

Distribution of elements in the rocks underlying the Kupferschiefer

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Abstract

The leached zone below the Kupferschiefer was investigated in two drillholes (drillhole Drevenack: Zechsteinconglomerate, drillhole Rannungen: grey sandstone) using sedimentpetrographical and geochemical methods. Samples were taken from the uppermost red coloured “Rotliegend” up to directly below the Kupferschiefer. No big differences concerning the mineral composition and the distribution of elements between the red coloured and the leached rocks have been found. The border between the two is no boundary for the changes which took place during diagenesis.

The trace element concentrations in both profiles are higher than the average values. The higher concentrations of elements in the whole leached zone must be interpreted as due to mobilisation from the underground. Besides, there is a clear zone of additional enrichment just below the Kupferschiefer which is a result of impregnation from it.

The elements were set free during recrystallisation of haematite. Cu, Ni and Pb are present possibily as sulfides whereas Mn and Zn are in the carbonates.

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Authors and Affiliations

  1. Sedimentpetrographisches Institut der Universität Göttingen, Deutschland

    Renate Knoke

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  1. Renate Knoke
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Herrn Prof. Dr. Dr. h.c. C. W. Correns und Herrn Prof. Dr. K. H. Wedepohl danke ich für zahlreiche Diskussionen und Anregungen. Herrn Prof. Dr. H. Harder danke ich für die Arbeitsmöglichkeit im Sedimentpetrographischen Institut.

Der Gewerkschaft Brigitta danke ich für die Überlassung der Bohrproben Rannungen, der Hamborner Bergbau AG für die Proben der Bohrung Drevenack.

Der Deutschen Forschungsgemeinschaft bin ich für finanzielle Unterstützung zu Dank verpflichtet.

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Knoke, R. Elementverteilung im Liegenden des Kupferschiefers. Contr. Mineral. and Petrol. 17, 347–366 (1968). https://doi.org/10.1007/BF00380744

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  • DOI: https://doi.org/10.1007/BF00380744

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