| Autor: |
S. Brooke-Barnett, Lidia Lonergan, J. Callot, N. Cellini, A. Csicsek, R. Graham, J. Ringenbach |
| Rok vydání: |
2019 |
| Předmět: |
|
| Zdroj: |
81st EAGE Conference and Exhibition 2019. |
| DOI: |
10.3997/2214-4609.201901289 |
| Popis: |
Summary Detailed work in the Provencal sub-Alpine chains shows that salt extrusion can be deduced from the presence of a number of overturned flaps (‘megaflaps’)which are not internally deformed but show reducedstratigraphic section and commonly contain pinch-outs and unconformities. This has been described before in one Provencal locality (Barles, Graham et al 2012 ) but here we document it additionally at Chasteuil near Castellane and Gevaudan near Barreme. The one-time glaciers produced by salt extrusion are now welded out. Mostly it is difficult to investigate the details of this process, but in the vicinity of the major transcurrent fault that bisects the arcuate fold belt of Provence we propose that evacuation involved lateral salt migration analagous to that of the Roho systems of the Gulf of Mexico, leaving an Eocene secondary minibasin in its wake. We believe that this may be the first description of such a structure in the Alps. It emphasizes that salt movement accompanied all the major tectonic episodes which occurred in the region, in both the Mesozoic passive margin and the Alpine foreland basin which succeeded it |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
