ABSTRACT

A large number of accumulations of Late Permian salt are mapped in the Norwegian-Danish Basin. Present-day observations of the salt crest and the interpreted salt surface in the rim syncline constitute the input data for modeling the present-day salt shape. The continuous growth of the salt structure, where the vertical motion becomes dominant compared to the horizontal motion, leads to development of the secondary rim synclines. The overhang thickness is insufficient to cause a major negative temperature anomaly in the rim syncline sediments; the temperature gradient further reduces the conductivity contrast between salt and sediments and thus lowers the thermal focusing. Trias 1 is interpreted to be the horizon defining the time of transition between the pillow and diapiric stage. Sediments older than Trias 1 appear to have been eroded over the then existing salt pillow.