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1 2024

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Lineament depth deduction using geomorphometry and 3D Euler solution

El Koundi Mourad, Dhaoui Mohamed, El Ghali Abdessalem

Acta Geophysica

2024

Vol. 72, no. 2

1327--1342

In this paper, we present a novel method for determining the depth of lineaments using satellite gravity data, which we test in the Sahel of Sfax area (eastern Tunisia). This region has a relatively flat topography with few significant discontinuities at the surface. As a first step, we used morphometric indices such as slope, aspect, and hydrographic network, calculated from SRTM DEM, to generate separate lineament maps. We then combined these lineaments into a synthetic lineament map, one that showed to be highly consistent with the Bouguer anomaly map deduced from satellite gravity data and the results of similar studies with gravity and seismic geophysical data. The lineament map was then refined and confirmed thanks to field data. These lineaments were later combined with the 3D Euler solution map, and their depth classification was deduced. These results demonstrate both the accuracy of the proposed method as a way to assess lineament depth and its ability to provide valuable information about an area's subsurface geology. This method can be useful for mineral exploration, hydrocarbon exploration, and geohazard assessments.