Vom Knollenquarzit zum hochreinen Quarzsand. Rohstoffgewinnung im Braunschweiger Land seit über 5.500 Jahren (Exkursion K am 6. April 2018)

Autor: Röhling, Heinz-Gerd, Langer, Alfred, Mandl, Jörg
Zdroj: Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins; March 2018, Vol. 100 Issue: 1 p325-379, 55p
Abstrakt: Domestic raw materials have been, since the beginning of settlement in the Brunswik area, more than 5.500 yrs ago, of great importance for the development of the region, as shown by the megalith tombs in area around Helmstedt. For more than 3.000 yrs sedimentary iron ore has been mined and smelted in ovens. Since the Early Medieval times until recently different sandstone and carbonate outcrops have been mined for dimension stones. Even today there are many active pits and quarries for industrial rocks and minerals, for example, sand, gravel, and carbonates. In contrast, the intensively-used clay and claystone outcrops, which provided materials for the regional brick-making industry, have all closed down over the last decades. Energy resources such as lignite (until 2016) or oil are still of economic interest today. Most of the salt mines that were active in the region have closed down; only the Braunschweig-Lüneburg salt mine is still active today. The iron ore mines and opencast pits have also closed down. Iron mining contributed exceptionally to the economic development of the region. Whereas the excursion guide gives a short overview on the different raw material deposits in the northern part of the area between the Harz Mountains and the Aller River, the field trip itself focuses on the area between the Elm Ridge and the Aller River.
Databáze: Supplemental Index