EurGeol Dr. rer. nat. Lutz Krakow and Dipl.-Geol. Franziska Schunke

Current clay potential in Germany | Part 5: Raw materials from the Keuper group/Trias system

>>1 Palaeographic position and structure of the Central European Basin at the time of the Middle Keuper, modified and extended model according to [1]
>>1 Palaeographic position and structure of the Central European Basin at the time of the Middle Keuper, modified and extended model according to [1]
»2 Thickness distribution of the Keuper – reconstruction from over 2 500 deep borings and numerous surface exposures, modified model from [1]
»2 Thickness distribution of the Keuper – reconstruction from over 2 500 deep borings and numerous surface exposures, modified model from [1]
>>3 K1 Sequence: Lower Lettenkohlen Keuper in the clay pit of the former brickworks ELM-Poroton in Schöningen/Subhercynian Basin Photo/Foto: Krakow (1989)
>>3 K1 Sequence: Lower Lettenkohlen Keuper in the clay pit of the former brickworks ELM-Poroton in Schöningen/Subhercynian Basin
Photo/Foto: Krakow (1989)
>>4 K1 Sequence: Upper Lettenkohlen Keuper in the clay pit of the former brickworks ELM-Poroton in Schöningen/Subhercynian Basin Photo/Foto: Krakow (1985)
>>4 K1 Sequence: Upper Lettenkohlen Keuper in the clay pit of the former brickworks ELM-Poroton in Schöningen/Subhercynian Basin
Photo/Foto: Krakow (1985)
>>5 K4 Sequence: Upper Gypsum Keuper with white gypsum residues in the clay pit of the former Unipor Brickworks in Friedland/Leinetal Trench Photo/Foto: Krakow (2008)
>>5 K4 Sequence: Upper Gypsum Keuper with white gypsum residues in the clay pit of the former Unipor Brickworks in Friedland/Leinetal Trench
Photo/Foto: Krakow (2008)
»6  K6 Sequence: Upper Rhaetic Keuper as the company’s own basic component of a leading brickworks in North Rhine-Westphalia/Egge Hills Photo/Foto: Krakow (2014)
»6  K6 Sequence: Upper Rhaetic Keuper as the company’s own basic component of a leading brickworks in North Rhine-Westphalia/Egge Hills
Photo/Foto: Krakow (2014)
>>7 Geological transect of the Keuper with assignment of locations (simplified model of Dr. Krakow Rohstoffe GmbH, 2017) vereinfachtes Modell der Dr. Krakow Rohstoffe GmbH, 2017
>>7 Geological transect of the Keuper with assignment of locations
(simplified model of Dr. Krakow Rohstoffe GmbH, 2017) vereinfachtes Modell der Dr. Krakow Rohstoffe GmbH, 2017
>>8 K4 Sequence in marginal facies: Lehrberg beds as a company-owned basic component of a well-known brickworks in Central Franconia/Southern German Block Photo/Foto: Krakow (2014)
>>8 K4 Sequence in marginal facies: Lehrberg beds as a company-owned basic component of a well-known brickworks in Central Franconia/Southern German Block
Photo/Foto: Krakow (2014)
»9 K4 Sequence in marginal facies: View of a spoil heap that essentially comprises the Hassberge Formation and Lehrberg Beds/Southern German Block Photo/Foto: Krakow (2014)
»9 K4 Sequence in marginal facies: View of a spoil heap that essentially comprises the Hassberge Formation and Lehrberg Beds/Southern German Block
Photo/Foto: Krakow (2014)
»10 K4 Sequence: After 111 years the Friedland Brickworks ceased production in December 2011/Leinetal Trench Photo/Foto: Krakow (2011)
»10 K4 Sequence: After 111 years the Friedland Brickworks ceased production in December 2011/Leinetal Trench
Photo/Foto: Krakow (2011)
»11 K6 Sequence in marginal facies: Extremely plastic clay in the Creussen Rhaetic clay pit in Upper Franconia/Southern German Block Photo/Foto: J. Meyer GmbH (2013)
»11 K6 Sequence in marginal facies: Extremely plastic clay in the Creussen Rhaetic clay pit in Upper Franconia/Southern German Block
Photo/Foto: J. Meyer GmbH (2013)
>>12 K6 Sequence in marginal facies: Rhaetic clay pit with changeover to the Lias/Grossheirath clay works in Upper Franconia/Southern German BlockPhoto/Foto: Adolf Gottfried Tonwerke Photo/Foto: Adolf Gottfried Tonwerke GmbH (2011)
>>12 K6 Sequence in marginal facies: Rhaetic clay pit with changeover to the Lias/Grossheirath clay works in Upper Franconia/Southern German Block
Photo/Foto: Adolf Gottfried Tonwerke
Photo/Foto: Adolf Gottfried Tonwerke GmbH (2011)
>>13 State-of-the-art preparation equipment for grinding, mixing and granulating clay Photo/Foto: Adolf Gottfried Tonwerke GmbH (1991)
>>13 State-of-the-art preparation equipment for grinding, mixing and granulating clay
Photo/Foto: Adolf Gottfried Tonwerke GmbH (1991)

Keuper clays with optimized grain size range used to be the magic ingredient for entire clay brick conglomerates and proud brick manufacturers. In the meantime, modified raw material requirements have contributed to the closures of numerous works sites. Currently, the Keuper constitutes an existential raw materials basis primarily for clay roofing tile plants in Franconia and Thuringia. What will the future look like?

1 Global geology and tectonics

After the Buntsandstein (Lower Triassic) and Muschelkalk (Middle Triassic), the Keuper (Upper Triassic) represents the third lithostratigraphic group of the German Triassic. It is covered by sequences from the Lower Jurassic. The name is derived from the Franconian dialect word “Keiper/Kieber”, originally referring to variegated, crumbly argillaceous rocks. In the year 1822, Leopold von Buch introduced the term Keuper into geoscientific literature. With a good 35 million years, the Keuper covers the longest period in the Triassic. The Keuper began around...

Find out more in

ZI 2/2017

Find out more in

ZI 2/2017

Ressort:  Technical Paper | Fachbeitrag
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