Pattern of the main tectonic trends from remote geophysics, geological structures and satellite imagery, Central Eastern Desert, Egypt

Rabie, Said I.; Ammar, Ahmed A.

doi:10.1080/01431169008955049

Cited by 12 publications

(3 citation statements)

References 4 publications

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“…4c and 5d). These trends correspond to the Gulf of Suez-Red Sea, Trans-African, Wadi Atalla, Gulf of Aqaba, Meridional (East African), and Mediterranean, respectively [40]. [41] identified the NW-SE structure as one of the Red Sea-related structures.…”

Section: High and Low-pass Filtered Magnetic Mapsmentioning

confidence: 99%

Structural Lineaments Detection Using Integrating Remote Sensing and Aeromagnetic Data in Gabal Umm Tinassib and its Surrounding Area, North Eastern Desert, Egypt

El Qassas,

Ahmed,

Abdel-Fattah

et al. 2024

Alexandria Journal of Science and Technology

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Section: High and Low-pass Filtered Magnetic Mapsmentioning

confidence: 99%

Structural Lineaments Detection Using Integrating Remote Sensing and Aeromagnetic Data in Gabal Umm Tinassib and its Surrounding Area, North Eastern Desert, Egypt

El Qassas,

Ahmed,

Abdel-Fattah

et al. 2024

Alexandria Journal of Science and Technology

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“…It represents the northern end of the Nubian-Arabian shield. Based on aeromagnetic maps, RABIE andAMMAR (1990), andMESHREF (1982) indicated that the basic tectonic trends affecting northeast Africa are NW and ENE while YOUSSEF (2003) considered the N150°as the significant trend in northern Egypt. The trend analysis of the surface and subsurface faults deduced from geological and geophysical data within 1°around the source area (ABOU ELENEAN and DEIF, 2003) reflects the existence of two dominant trends N60°E and N45°W.…”

Section: Geology and Tectonicsmentioning

confidence: 99%

The October 11, 1999 and November 08, 2006 Beni Suef Earthquakes

Elenean

Hussein

2008

Pure appl. geophys.

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Two felt moderate-sized earthquakes with local magnitudes of 4.9 on October 11, 1999 and 4.3 on November 08, 2006 occurred southeast of Beni Suef and Cairo cities. Being well recorded by the digital Egyptian National Seismic Network (ENSN) and some regional broadband stations, they provided us with a unique opportunity to study the tectonic process and present-day stress field acting on the northern part of the Eastern Desert of Egypt. In this study, we analyze the main shocks of these earthquakes and present 15 well recorded aftershocks (0.9 B ML B 3.3) which have small errors on both horizontal and vertical axes. The relocation analysis using the double difference algorithm clearly reveals a NW trending fault for the 1999 earthquake. The spatial distribution of its aftershocks indicates a propagation of rupture from the SW towards the NW along a fault length *5 km dipping nearly *40°SW. We also determined the focal mechanisms of the two main shocks by two methods (polarities and amplitudes ratios of P, S V and S H and regional waveform inversion). Our results indicate a normal faulting mechanism with a slight shear component for the first event, while pure normal faulting for the second one. The spatial distribution of the 1999 aftershocks sequence along with the retrieved focal mechanism confirmed the NW plane as the true fault plane. While for the 2006 event, the few aftershocks do not reveal any fault geometry; its focal mechanism indicated a pure normal fault nearly trending WNW-ESE that corresponds more likely to the extension of the 1999 earthquake fault. The seismicity distribution between the two earthquake sequences reveals a noticeable gap that may be a site of a future event. The NNE-SSW extensional stress indicated by the mechanisms of these events is in agreement with the regional stress field and the rifting of the northern Red Sea in its northern branches (Gulf of Suez and Gulf of Aqaba). The source parameters (seismic moment, moment magnitude, fault radius, stress drop and displacement across the fault) were also estimated and compared based on both the regional waveform inversion and the displacement spectra and interpreted in the context of the tectonic setting. The obtained results imply a reactivation of the pre-exiting NW-SE faults as a result of extensional deformation from the northern Red Sea-Gulf of Suez rifts.

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“…Our approach has been effectively used to constrain the crustal architecture and geology of numerous areas including: Rabie and Ammar (1990), Kamel and Elsirafe (1994) in Egypt, Lunden et al (2001) in Sweden, Lamontagne et al (2003) in Canada, Chen and Zhou (2005) in China, Yassaghi (2006) in Iran, Saadi et al (2008a, b) in Libya, Khamies and El-Tarras (2010) in Egypt, Azizi and Saibi (2015) and Azizi et al (2015) in Aynak-Logar valley, eastern Afghanistan.…”

Section: Introductionmentioning

confidence: 99%

Structural Investigations of Afghanistan Deduced from Remote Sensing and Potential Field Data

2016

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This study integrates potential gravity and magnetic field data with remotely sensed images and geological data in an effort to understand the subsurface major geological structures in Afghanistan. Integrated analysis of Landsat SRTM data was applied for extraction of geological lineaments. The potential field data were analyzed using gradient interpretation techniques, such as analytic signal (AS), tilt derivative (TDR), horizontal gradient of the tilt derivative (HG-TDR), Euler Deconvolution (ED) and power spectrum methods, and results were correlated with known geological structures. The analysis of remote sensing data and potential field data reveals the regional geological structural characteristics of Afghanistan. The power spectrum analysis of magnetic and gravity data suggests shallow basement rocks at around 1 to 1.5 km depth. The results of TDR of potential field data are in agreement with the location of the major regional fault structures and also the location of the basins and swells, except in the Helmand region (SW Afghanistan) where many high potential field anomalies are observed and attributed to batholiths and near-surface volcanic rocks intrusions. STRUCTURAL INVESTIGATIONS OF AFGHANISTAN 979 A high-resolution airborne geophysical survey in the data sparse region of eastern Afghanistan is recommended in order to have a complete image of the potential field anomalies.

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Pattern of the main tectonic trends from remote geophysics, geological structures and satellite imagery, Central Eastern Desert, Egypt

Cited by 12 publications

References 4 publications

Structural Lineaments Detection Using Integrating Remote Sensing and Aeromagnetic Data in Gabal Umm Tinassib and its Surrounding Area, North Eastern Desert, Egypt

Structural Lineaments Detection Using Integrating Remote Sensing and Aeromagnetic Data in Gabal Umm Tinassib and its Surrounding Area, North Eastern Desert, Egypt

The October 11, 1999 and November 08, 2006 Beni Suef Earthquakes

Structural Investigations of Afghanistan Deduced from Remote Sensing and Potential Field Data

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