GEOPHYSICAL STUDIES ON THE WESTERN SIDE OF THE GULF OF SUEZ, EGYPT
AMIR MOHAMED AMIN GABR;
Abstract
ABSTRACT
The area of study comprises the western side of the Gulf of Suez, onshore strip, and the near offshore coastal area. It lies between Latitudes 27"
15' - 30" 00' Nand Longitudes 32" 00' - 34" 15' E.
This study is based mainly on the potential field (magnetic and gravity) data which are integrated with the geological information from the available subsurface borehole data. The geophysical data include the total field intensity aeromagnetic map of the area and the available part of the compiled Bouguer gravity map, while the borehole data of more than forty wells, drilled in the area constitute the geological subsurface information. Moreover, the data from the surface and the landsat Satellite lineaments map were used.
The main objectives of this study are the delineation of the regional basement structural framework of the area and spot lighting the most prospective and promising locations for other future hydrocarbon exploration. To accomplish these goals, the geophysical and geological data were used.
Reduction to pole (RTP) technique was carried out on the total field
aeromagnetic map. Residual and regional components of the magnetic and
Two and half magnetic modeling for six selected profiles were carried out
to confirm the proposed basement structures in the area.
•
Finally a regional basement structural contour map for the area was
constructed using all the previous resulted maps integrated with the subsurface information. This map dipects several major NW trending uplifted basement belts separated by structural lows which may be considered in future exploration projects. Two shear zones cross the area with a probable
western extension were detected.
&
m
gravity data were isolated using nine-points and least-square polynomial techniques. Second vertical derivative (SVD) was used to enhance the subtle anomalies which did not appear clearly in the previous maps.
Trend analysis technique was carried out on most of the resulted maps in addition, the landsat lineaments map. The results of the trend analysis showed that the area is affected by six major dominant trends namely N35°W (Suez or Clysmic), N50°-70°W(Najd), N5°-25°E (Aqaba), N-S (East African), N60°E (Syrian or Qattara), and N85°E (Tethyan or Mediterranean) trends respectively.
Depth to basement surface was estimated using some traditional methods as well as the spectral analysis technique which was carried out on selected profiles passing through the magnetic and gravity anomalies. All these methods showed that, the thickness of the sedimentary cover ranges between 4Km in the central and northern portions to zero in the southern portion where many basement outcrops were located such as Gebel El Zeit, Esh El Mellaha, Gebel Gharib and the Red sea hills in the most western part of the area. While, within the onshore sub-basins (zeit sub-basin and Mellaha sub-basin), the estimated depth to the basement is about 6 and 5 km
respectively.
n
I
The area of study comprises the western side of the Gulf of Suez, onshore strip, and the near offshore coastal area. It lies between Latitudes 27"
15' - 30" 00' Nand Longitudes 32" 00' - 34" 15' E.
This study is based mainly on the potential field (magnetic and gravity) data which are integrated with the geological information from the available subsurface borehole data. The geophysical data include the total field intensity aeromagnetic map of the area and the available part of the compiled Bouguer gravity map, while the borehole data of more than forty wells, drilled in the area constitute the geological subsurface information. Moreover, the data from the surface and the landsat Satellite lineaments map were used.
The main objectives of this study are the delineation of the regional basement structural framework of the area and spot lighting the most prospective and promising locations for other future hydrocarbon exploration. To accomplish these goals, the geophysical and geological data were used.
Reduction to pole (RTP) technique was carried out on the total field
aeromagnetic map. Residual and regional components of the magnetic and
Two and half magnetic modeling for six selected profiles were carried out
to confirm the proposed basement structures in the area.
•
Finally a regional basement structural contour map for the area was
constructed using all the previous resulted maps integrated with the subsurface information. This map dipects several major NW trending uplifted basement belts separated by structural lows which may be considered in future exploration projects. Two shear zones cross the area with a probable
western extension were detected.
&
m
gravity data were isolated using nine-points and least-square polynomial techniques. Second vertical derivative (SVD) was used to enhance the subtle anomalies which did not appear clearly in the previous maps.
Trend analysis technique was carried out on most of the resulted maps in addition, the landsat lineaments map. The results of the trend analysis showed that the area is affected by six major dominant trends namely N35°W (Suez or Clysmic), N50°-70°W(Najd), N5°-25°E (Aqaba), N-S (East African), N60°E (Syrian or Qattara), and N85°E (Tethyan or Mediterranean) trends respectively.
Depth to basement surface was estimated using some traditional methods as well as the spectral analysis technique which was carried out on selected profiles passing through the magnetic and gravity anomalies. All these methods showed that, the thickness of the sedimentary cover ranges between 4Km in the central and northern portions to zero in the southern portion where many basement outcrops were located such as Gebel El Zeit, Esh El Mellaha, Gebel Gharib and the Red sea hills in the most western part of the area. While, within the onshore sub-basins (zeit sub-basin and Mellaha sub-basin), the estimated depth to the basement is about 6 and 5 km
respectively.
n
I
Other data
| Title | GEOPHYSICAL STUDIES ON THE WESTERN SIDE OF THE GULF OF SUEZ, EGYPT | Authors | AMIR MOHAMED AMIN GABR | Issue Date | 1997 |
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