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<p>The main objective of this study is to improve and refine the understanding of the deep structural framework of the Saouaf, Sisseb El Alem, and Echougafia basins using seismic and gravity data. A residual gravity map was derived from the Bouguer anomaly map, allowing the identification of an architecture composed of high-density contrast zones (positive anomalies) and low-density zones (negative anomalies), separated by gravity gradients of varying amplitudes. This gravity pattern corresponds to resistant structural domains bounded by major faults that separate them from subsiding areas. Three-dimensional inversion and two-dimensional forward gravity modeling, integrated with geological outcrop data, made it possible to reconstruct the main structural features. Euler deconvolution was applied and combined with seismic reflection data to generate a comprehensive structural model, confirming several faults previously identified by seismic method and revealing additional lineaments trending NE–SW, N–S, NW–SE, and E–W.</p>

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Gravity modeling and seismic interpretation to identify deep structures: study case Sisseb El Alem basin, center Tunisia

  • 期刊论文

  • 发表日期：

    2026年6月29日

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  • Mohamed Atawa,
  • Faten Houatmia,
  • Ali Bennour,
  • Abdessattar Hamdi,
  • Mohamed Gasmi

摘要

The main objective of this study is to improve and refine the understanding of the deep structural framework of the Saouaf, Sisseb El Alem, and Echougafia basins using seismic and gravity data. A residual gravity map was derived from the Bouguer anomaly map, allowing the identification of an architecture composed of high-density contrast zones (positive anomalies) and low-density zones (negative anomalies), separated by gravity gradients of varying amplitudes. This gravity pattern corresponds to resistant structural domains bounded by major faults that separate them from subsiding areas. Three-dimensional inversion and two-dimensional forward gravity modeling, integrated with geological outcrop data, made it possible to reconstruct the main structural features. Euler deconvolution was applied and combined with seismic reflection data to generate a comprehensive structural model, confirming several faults previously identified by seismic method and revealing additional lineaments trending NE–SW, N–S, NW–SE, and E–W.