Assessment of the geodynamical settings around the main active faults at Aswan area, Egypt

详细信息    查看全文

• 作者：Ali M. Radwan ; Ahmed Hosny ; A. Kotb ; Ahmed Khalil…
• 关键词：Magnetic ; Seismic ; GPS ; Aswan
• 刊名：Arabian Journal of Geosciences
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：8
• 期：7
• 页码：4317-4327
• 全文大小：13,834 KB
• 参考文献：Abou Elenean KM (2007) Focal mechanisms of small and moderate size earthquakes recorded by the Egyptian National Seismic Network (ENSN), Egypt. NRIAG J Geophys 6:119-53
  Awad H (1994) Investigation of the tectonic setting, seismic activity and crustal deformation in Aswan seismic region, Egypt, Ph.D. Thesis, Tokyo University
  Awad H (2002) Seismicity and water level variations in the Lake Aswan area in Egypt 1982-997. J Seismol 6:459-67View Article
  Awad H, Mizoue M (1995a) Earthquake activity in the Aswan Region. Egypt Pure Appl Geophys 145(1):69-6. doi:10.-007/?BF00879484 View Article
  Awad H, Mizoue M (1995b) Earthquake activity in the Aswan region, Egypt, Pageoph 145, 1, 69-6
  Awad H, Denton P, Maguire P, Hassib G (2003) Relocation of swarm events in the June 1987 earthquake sequence from the Lake Aswan area in Egypt. Pageoph 160, 1245
  Dach R, Hugentobler U, Fridez P, Meindl M (eds) (2007) “Bernese GPS Software Version 5.0- Astronomical Institute, University of Bern
  Fernandes RMS, Bastos L, Ambrosius BAC, Noomen R, Matheussen S, Baptista P (2004) Recent geodetic results in the Azores Triple Junction region. Pure Appl Geophys 161(3):683-99. doi:10.-007/?s00024-003-2469-y View Article
  Geosoft V.4.3 (1995) Gravity and magnetic modeling version 3.6. Northwest Geophysical Association, Inc. (NGA), Corvallis
  Hansen RO, Pawlowski RS (1989) Reduction to the pole at low latitudes by Weiner filtering. Geophysics 54:1607-613View Article
  Issawi B (1969) Geology of the Kurkul-Dungul area, General Egyptian Organization for Geological Research and Mining. Geological Survey, Cairo, p 46
  Issawi B (1982) Geology of the southwestern desert of Egypt. Ann Geol Surv Egypt 11:57-6
  Issawi B (1987) Geology of the Aswan Desert. Ann Geol Surv Egypt 35:115-18
  Kebeasy RM, Maamon M, Ibrahim EM (1981) Aswan Lake induced earthquakes. Bull Intern Inst Seismol Earthq Eng 19:155-60
  Mohamed A, Mizoue M (1995) Earthquake activity in the Aswan Region, Egypt. Pageoph 145(1):69-6View Article
  Nabighian MN (1984) Towards a three dimensional automatic interpretation of potential field data via generalized Hilbert transform: fundamental relations. Geophysics 47:780-86View Article
  Rayan A, Fernandes RMS, Khalil HA, Mahmoud S, Miranda JM, Tealab A (2009) Evaluation of the crustal deformation in the northern Region of Lake Nasser (Egypt) derived from 8?years of GPS campaign observations. J Geodyn. doi:10.-016/?j.?jog.-009.-0.-10
  Simons W, Ambrosius B, Noomen R, Angermann D, Wilson P, Becker M, Reinhard, Suetsugu, D (1998) Practice on source mechanism, IISEE Lecture note, 104 pp. Tsukuba, Japan
  Suetsugu D (1998) Practice on source mechanism, IISEE Lecture note, , 104 pp. Tsukuba, Japan
  Woodward-Clyde Consultants (WCC) (1985) Earthquake activity and Dam stability evaluations for the Aswan High Dam, Egypt: report for the High and Aswan Dams Authority, Ministry of Irrigation, A.R. Egypt, (internal report), Egypt. Contract No. 263-0102-C-00-HADA-00 USAID Project No. 263-0042
  
• 作者单位：Ali M. Radwan (1)
  Ahmed Hosny (1)
  A. Kotb (1)
  Ahmed Khalil (1)
  Azza Abed (1)
  R. M. S. Fernandes (2)
  A. Rayan (1)
  
  1. National Research Institute for Astronomy and Geophysics (NRIAG), Helwan, Cairo, Egypt
  2. UBI, CGUL, IDL, R. Marques d’Avila e Bolama, 6201-001, Covilha, Portugal
  
• 刊物类别：Earth and Environmental Science
• 出版者：Springer Berlin Heidelberg
• ISSN：1866-7538

文摘

The proper evaluation of the level of crustal deformations in the Aswan region, especially around the main active faults, is crucial due to the existence of one major artificial structure: the Aswan High Dam. This construction created one of the major artificial lakes in the world: Lake Nasser. The Aswan area is considered as an active seismic area in Egypt due to the frequent recurrence of felted earthquakes. Two earthquakes occurred in the region (Kalabsha fault) after the construction of the Aswan High Dam: November 14, 1981 (ML--.6) and December 26, 2011 (ML--.1). The main goal of this study is to evaluate the active geological structures that can potentially affect the Aswan High Dam and that are being monitored in detail. For implementing such objective, several techniques (namely magnetic, seismic and GPS) have been utilized. A detailed land magnetic survey was carried out for the total component of the geomagnetic field using two proton magnetometers. The obtained magnetic results reveal that there are three major parallel faults affecting the area. The most dominant magnetic trend strikes those faults in the WNW-ESE direction. The seismicity and the fault plane solution associated with the December 26, 2011 earthquake have been also analyzed. The source mechanism of this event delineates two nodal planes. The trending ENE-WSW to E-W is consistent with the direction of the Kalabsha fault and its extension towards east. The trending NNW-SSE to N-S is consistent with the N-S fault trending. The movement along the ENE-WSW plane is right lateral, while left lateral along the NNW-SSE plane. Based on the estimated relative motions using GPS, dextral strike-slip motions at the Kalabsha and Seiyal fault systems are identified by the velocity gradient changes between the southern and northern stations. However, at the area between Kalabsha and Seiyal faults, other relative movements are also observed, which is consistent with other set of faults (N-S).