Role of Interactions Between Diastrophism--Change of Sea Level-Climatology in the Genesis and Evolution of Some Tunisian Sedimentary Basins from Kasserine Archipelago, Sahel Cap Bon and Pelagian Sea

C. Bobier, C. Viguier

The workers record the structural evolution of some basin systems representative of regional basin development in the "Intermediate Zone," which separates the Saharian platform and the Tellian trough in Tunisia. The examples point out the main structural style that initiates sedimentary sags. In all the exposed cases, the evolution of conjugate wrench-fault systems has strictly controlled structural evolution since the Neogene. Strike-slip movements are believed to have formed similar structures since the Cretaceous. These observations imply a mobility of space and time for the structures, which is sometimes responsible for inversion.

In the context of carbonate platforms which, from the Cretaceous to the Neogene, characterize the "Tunisian Intermediate Zone," this type of diastrophism amplifies local effects of the change in mean sea level. Otherwise and at least during the Paleogene and Neogene, the thickness and nature of the sedimentary series are clearly conditioned by climate variations.

AAPG Search and Discovery Article #91032©1988 Mediterranean Basins Conference and Exhibition, Nice, France, 25-28 September 1988.