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Regional Case Studies |
Federal Institute of Geosciences and Natural Resources (BGR), Stilleweg 2, D30631 Hannover, Germany
The structure of the most important stratigraphic horizons in the Gorleben salt dome area, northwest Germany, has been studied using reflection-seismic data and drilling results. Epeirogenic, tectonic and halokinetic movements in the area can be reconstructed on the basis of structure-contour maps, isopach maps, and palaeostructure-contour maps. For this purpose the increase of sediment volume in the rim synclines was calculated in three dimensions and compared with the results of the ‘normal’ subsidence. The additional subsidence in the rim synclines was used for calculation of salt flow by volume. By budgeting the salt movements, the flow rate of salt into the diapir and the salt loss by erosion and leaching were determined. The movement of the salt from the Late Buntsandstein (Röt) until today is depicted in 13 successive stages in three-dimensional diagrams using computer programs.
