Geological and geophysical evaluation of the subsurface conditions for establishing new dwelling area East New Cairo City

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Abstract

An integrated geological and geophysical study utilising electrical resistivity tomography (ERT) and seismic refraction tomography (SRT) was carried out in a new residential area located northeast of New Cairo City and south of the Suez-Cairo Road. The purpose was to characterise the subsurface layer distribution, lithology, and geometry of faults . Initial surface geological mapping identified traces of some faults. Stratigraphically, the study area comprises sedimentary rocks and local basaltic flow outcrops ranging in age from the Middle Eocene (Mokattam Formation) to the Upper Miocene (Hagul Formation). ERT and SRT data were acquired along 15 closely spaced profiles oriented to intersect the expected surface fault zones. ERT delineated electrical conductive zones situated at different depths and composed of shale and altered basalt. Meanwhile, three layers were detected based on velocity values obtained from SRT data analysis. The ERT and SRT results successfully elucidated the fault configuration and its locations, providing crucial information for construction planning. Major structures were concealed and only outlined by the integrated ERT/SRT surveys. This study shows heterogeneous soil conditions and fault damage zones, which may impact some parts of the study area. The study’s findings , offering vital information for safe and effective construction planning.

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NRIAG Journal of Astronomy and Geophysics
Volume 14, Issue 1
December 2025
Pages 36-50

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