Permocarbon trough in northern Switzerland

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The northern Swiss permocarbon trough is located in the cantons of Aargau , Schaffhausen , Solothurn and Zurich , several kilometers wide and around 60 km long . This trough contains a 2 to 3 km thick sediment sequence of the Carboniferous and Permian , which arose along a transverse fracture . Such transverse fractures arose in a late phase of the Variscan mountain formation and penetrated the basement .

The permocarbon trough was found during deep drilling by the National Cooperative for the Storage of Radioactive Waste (NAGRA). These took place between October 1982 and February 1985 in Böttstein , Weiach , Riniken , Schafisheim , Kaisten and Leuggern , and between September 1988 and April 1989 also in Siblingen . At a depth of 1 km, the predicted granite from the crystalline subsoil was not encountered , but sediments from the trough. The project of the final storage of radioactive waste in granite was then abandoned and several planned exploratory boreholes in Hägendorf , Niedergösgen , Hornussen , Birrhard and Bachs / Steinmaur were no longer carried out.

Individual evidence

  1. ↑ Federal Department for the Environment, Transport, Energy and Communication DETEC (2008): Sectoral plan for deep geological repositories , p. 18, online (PDF) ( Memento of July 14, 2011 in the Internet Archive )