Stratigraphy and tectonics of the Zechstein in the Gorleben salt-dome based on the result of drillings

Interpretations of more than 30 drillings in the Gorleben area are presented. Two drillings (Gorleben 1003 and 1002) are located on the northwestern and another two (Gorleben 1004 and 1005) on the southeastern flank of the salt-dome. The drillings reached a depth up to 200 m. 30 drillings which reached the top of the dome have been executed to explore the composition and the structure of the caprock and to compile a geologic map of the salt-mirror. The interpretations of the cores led to a nearly complete profile of saltrocks from Zechstein 2 up to the upper Zechstein 4. In comparison with profiles from the Hannover area there are only a few differences in regard to the distance. Complicated structures have been recognized in all drillings, thus demonstrating an intensive folding. Investigations of the profiles and orientated tores as well as electromagnetic reflection measurements allowed to recognize the structure of the salt-dome. (orig.)