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Environmental Earth Sciences

, Volume 70, Issue 4, pp 1539–1550 | Cite as

Delineation the active subsurface structures at Fayoum-Cairo district, Egypt, using magnetic and magnetotelluric tools

  • Taha RabehEmail author
Original Article

Abstract

In this work, we present a reconnaissance study to elucidate and delineate subsurface fault structures for an active tectonics area that lies between Cairo and El Fayoum provinces and consider major sources of seismicity in Egypt. Well logging, aeromagnetic, land magnetic, and magnetotelluric data have been used. The well-logging data were used for several drilled wells along W–E direction. The magnetic data were analyzed using trend analysis, 3D magnetic modeling, and Werner deconvolution techniques. The magnetotelluric data were interpreted using 2D (TM–TE) modeling techniques. The results show that there are eight major fault structures having E–W, N–S, and NW–SE directions. These faults extend downward for about 20 km at the Dahshour and Qatrani areas. The epicenter sources of the earthquakes are clustering around the intersections of these structures. The Kattaniya horst structure has been interpreted as a regional structure that exceeds the limits previously determined by geologists. The depth to this horst reaches about 1.8 km at the NW and more than 4.3 km at the southern parts. The interpreted values of magnetic susceptibility at the horst zone indicate that they are ultrabasic/basic intrusion bodies.

Keywords

Land survey Aeromagnetic Subsurface structures and 2D magnetotelluric modeling Seismicity 

Notes

Acknowledgments

The author also thanks the National Research Institute of Astronomy and Geophysics for providing the required data, facilities, and equipment for field work. We are also deeply appreciative to the Egyptian General Petroleum Cooperation for supplying us with aeromagnetic data.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.National Research Institute of Astronomy and GeophysicsHelwanEgypt

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