Die Isotopenzusammensetzung von Dolomiten und Kalken aus dem süddeutschen Malm |
| |
| Authors: | W Bausch J Hoefs |
| |
| Institution: | (1) Mineralogisches Institut der Universität Erlangen, Deutschland;(2) Geochemisches Institut der Universität Göttingen, Deutschland |
| |
| Abstract: | On dolomites and calcites from the Malm (Upper Jurassic) formation of Southern Germany 
13C and
18O-determinations have been done. The most striking feature of our results is that the dolomites are isotopically lighter in oxygen isotope composition than the coexisting calcites. The isotopic composition of the formation waters during dolomitization and diagenetic recrystallization seem to be more effective in influencing the isotope composition of dolomites than a possible fractionation under isotopic equilibrium conditions. Although it is often assumed that dolomite is more stable against diagenetic isotope exchange than calcite, it is demonstrated that the 18O-content of dolomites seems to decrease too with increasing geologic age. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
