الفهرس 
صفحة العنوانOnly 14 pages are availabe for public view
 |  | from | 148 |  |  |
| | | from | 148 | | |
Abstract
The Sinai Peninsula is recognized as a sub-plate of the African plate placed at the triple junction of the Gulf of Suez Rift, the Dead Sea Transform Fault (DSTF), and the Red Sea Rift. The upper and lower crustal structures of this tectonically active, quickly developing region and poorly understood. So, the present study aims to highlight a high-resolution crustal structure model to understand the study area tectonically.
Geophysical data in the form of the Bouguer gravity and reduction to the pole (RTP) aeromagnetic maps with seismicity data have been used to achieve the goal of this study by explaining the qualitative and quantitative interpretation in the studied region. The 2-D interactive sequential modelling of the Bouguer gravity data performed along with some well-selected profiles with constraints of the existing crustal layer depth’s point from the previous works in the studied region. The 3-D model estimated from the 2-D models with the three depth maps constructed (Precambrian basement, Conrad, and Moho surfaces).
The results show that the depth to the basement rocks are exposed to the surface at the southern side of the studied region and the depth increase toward the northern direction and reaches to (-5 km) below the coastal line of the southeastern Mediterranean.
In the meantime, the depth of Conrad discontinuity, reflecting the thickness of the upper crust, varies approximately (-12 km) at the north-eastern and southwestern parts (parallel to the Gulf of Suez) and (-22 km) at the southeastern part of the area (parallel to the Gulf of Aqaba). While the Moho discontinuity depth which represents the crustal thickness ranges from (-26 km) at the northeastern and southwestern parts to (-35 km) at the southeastern direction.
The tentative basement structure map of the study area was well-defined from the Horizontal Gradient filter of gravity and magnetic data and the Euler Deconvolution technique with structure index (SI=0.5) for magnetic and (SI=1) for gravity.
The present work provides the major geologic and tectonic features using a 3-D density model. Therefore, the existing correlation between topography, Bouguer anomalies, structure maps and crustal depths suggests that the region under investigation is tectonically active especially in the southern part. So, during make the developing plan we should take this information in our mind for construction style. from that can we conclude that the northern part of the Sinai Peninsula is more stable for infrastructure developing.