Isotope ratios in Zechstein carbonates

The carbonate deposits of the ten wells are located at the southern marginal platform of the Gennan Zechstein Basin. The thickness of the Ca2- carbonates varies between 40 and 220 m.

Sedimentation of the Ca2 started with the transgression of the Zechstein sea over the sulfates of the Al. The inundation of the Al-platform is characterised by the growth of thick ooid- layers. These layers are divided into two cycles, witch can be characterised as two shallowing upward-cycles with inter- to subtidal sediments at the end of the cycles.