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Hans-Jürgen Schmidt:
The Former Potassium Mine of Gewerkschaft Thuringia in Heygendorf

The potassium mine in Thuringia was located in Heygendorf in today's Kyffhäuser district in the north-eastern part of the state of Thuringia. It was entered in the Ziegelroda topographic map No. 4634. The disused potassium mine in Rossleben and the copper shale mine in Niederröblingen were located in its vicinity. Sangerhausen in the north, Querfurt in the east and Artern in the west were the larger towns nearby. The deposits of the former potassium mine in Thuringia with its mine shafts, Thuringia I and II, belong to the Upper Permian formation. The potassium salt was mined from the Stassfurt potassium scene on the north-eastern flank of the Rossleben saddle.

According to the deeds, Gewerkschaft Thuringia was established on 22 February 1905 when permission was granted for a mining field of roughly 22 Prussian normal fields. As the years passed, the potassium mine developed as part of the general upswing in the German potassium industry at the beginning of the 20th century. However, difficult mining conditions and problematic economic conditions following the First World War led to its closure in the 1920s. The article analyses the history of the potassium mine Thuringia with a special focus on the mining conditions.