Die Liegendschichten der devonischen Pyrit- u. Schwerspat-Lager von Eisen (Saarland), Meggen und des Rammelsberges |
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| Authors: | Dr Werner Gwosdz Dr Horst Krüger Dietmar Paul Dipl-Geol Dr Albrecht Baumann |
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| Institution: | 1. Institut für Geologie und Pal?ontologie der Technischen Universit?t, Pockelsstra?e 4, D-3300, Braunschweig
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| Abstract: | Detailed petrographic and geochemical investigations on the rocks underlying the Devonian stratiforme pyrite and barite deposits of Eisen (Saar district), Meggen (Westphalia), and Rammeisberg (Harz Mountains) in the Rhenish Schiefergebirge have led to the following conclusions: - These deposits are tied to dark shales of the pelagic basin facies. In all cases a local depression of the sea floor coincides largely with the spatial extension of the overlying pyrite and barite bodies. These depressions are marked by a large number of sand and silt intercalations, accumulations of reef debris and a significant lower carbonate content.
- The dark shales underneath the deposits have conspicuously high, but strongly varying contents of Mn, Zn and Pb. This, corresponding with the low carbonate content, is characteristic for the presence of hydrothermal, metalliferous emissions.
- Predepositional phases of sulfide and barite emplacement are indicated by small layers and lenses.
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