(Grube Churfürst Ernst, Bönkhausen, Sundern, Sauerland, Nordrhein-Westfalen, Deutschland)
Ancient lead mine, working hydrothermally formed veins in mid-devonian sandstones and limestones. The mine was started in 1549 and extensively worked during the late 16th century. After the 30 years war, it was frequently re-worked, but without great success. In 1890, it was finally abandoned.
Located on Klauenberg hill near Bönkhausen, about 8 km south of Sundern. The remaining dumps cover the slopes of a small valley. In large parts of this area, collecting is strictly prohibited.
References:
- Stieglitz, H. and Metz, W. (1989): Die Mineralien der Grube Churfürst Ernst in Bönkhausen. Lapis 14 (2), 22-27; 33; 42.
- D. Pawlowski: "Mineralfundstellen im Sauerland", Weise (Munich), 1991
- Lapis 14(2):22-42 (1993) [wrong year?]
- Wittern, A. (1994): Sekundärmineralien durch Feuersetzen in Oberschulenberg, Bönkhausen, Bleialf und Badenweiler. Der Aufschluss 45, 36-42. (in German)
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Map Reference: 51°17'19"N , 8°0'13"E
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Mineral List:50 entries listed. 48 valid minerals.
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