Structural architecture and tectonic evolution of the Yelleg inverted half graben,northern Sinai,Egypt |
| |
| Institution: | 1. Geological Survey of Israel, Jerusalem, Israel;2. Ben-Gurion University of the Negev, Be''er Sheva, Israel;3. University of Washington, Seattle, WA, USA;4. Dead Sea and Arava Science Center, Israel;1. Department of Geosciences, Tel Aviv University, Israel;2. Geological survey of Israel, Jerusalem, Israel;3. Department of Geological and Environmental Sciences, Ben Gurion University of the Negev, Beer Sheva, Israel;4. Department of Geology, University of Maryland, MD, USA |
| |
| Abstract: | The Gebel Yelleg area includes a number of folds belonging to the northern Sinai Syrian Arc structures. Detailed surface structural mapping and subsurface (seismic and borehole) data show that the Gebel Yelleg structures are related to Late Cretaceous-Early Tertiary inversion of a Jurassic asymmetric (or half) graben formed during the opening of Neotethys. The inversion structures include a large (45-km long) asymmetric fold (Yelleg Anticline) with a steep flank overlying the southeastern (main) bounding fault of the inverted half graben as well as some right-stepped en echelon folds overlying the northwestern bounding fault of the half graben. The large inversion anticline is dissected by a large number of long, nearly orthogonal normal faults whereas the en echelon folds are dissected by transverse normal faults and two sets of oblique-slip faults. Inversion of the northern Sinai extensional basins is related to Africa-Eurasia convergence and was probably transpressional with a small component of dextral slip. This study shows that the magnitude of inversion in the northern Sinai fold belt decreases toward the southern boundary of the Jurassic extensional province. |
| |
| Keywords: | Gebel Yelleg Gebel Falig Syrian Arc folds Inverted half graben Transpression |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
