GoldSilbereck, Rotgülden, Murwinkel, Lungau, Salzburg, Austria
Silbereck (einschl. Altenbergkar), Rotgülden, Murwinkel, Lungau, Salzburg, Österreich
Structurally controlled precious-metal (Au-Ag) mineralization, hosted in marbles of the Permo(?)-Mesozoic Silbereck Formation and in the underlying Variscan Central gneiss.
Located in the south-eastern Altenbergkar-Silbereck area.
Several adits are known: Fahlerzstollen, Fensterstollen, ...
Three different marble-hosted ore types, following fracture systems as well as foliation and bedding planes can be distinguished:
(1) metasomatic replacement ores,
(2) ores in tension gashes, and
(3) ores in talc-bearing structures, often containging high-grade gold and silver ore mineralization (native gold associated with Ag-Pb-Bi-sulfosalts).
Four stages of mineralization can be distinguished which occur in all ore types: arsenopyrite-pyrite-pyrrhotite (first stage), Au-(Ag-Pb-Bi-sulfosalts) (second stage), base-metal sulfides and tetrahedrite-tennantite (third stage) and Ag-rich galena (fourth stage).
References
- Horner, J., Neubauer, F., Paar, W.H., Hansmann, W., Koeppel, V., and Robl, K. (1997): Structure, mineralogy, and Pb isotopic composition of the As-Au-Ag deposit Rotgülden, Eastern Alps (Austria): significance for formation of epigenetic ore deposits within metamorphic domes. Mineralium Deposita 32, 555-568.
- Putz, H.; Paar, W. H.; Topa, D.; Horner, J.; Lueders, V. (2003): Structurally controlled gold and sulfosalt ore mineralization: the Altenberg example, Salzburg Province, Austria. Mineralogy and Petrology 78, 111-138.
- PUTZ, H. (2004) : Die Bergbaue im Raum Altenbergkar - Silbereck SE-Grat und ihre Mineralführung. Mineralogisches Archiv Salzburg 10, 206–214.
Mineral List
21 entries listed. 20 valid minerals.
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