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<p>EMAG2V3 magnetic data were interpreted to investigate the Southwest region of Chad. The purpose of this study is to draw attention to the possible site of interest and the structures hidden beneath the geological formations. The Oasis Montaj software utilized various magnetic data processing techniques, including multi-scale analysis of horizontal gradient maxima, analytical signal analysis, and Euler deconvolution. The structural map created through multi-scale analysis of local maxima and Euler deconvolution enabled the identification and classification of 31 lineaments and some intrusive bodies. The methods enabled the mapping of discontinuous lines, revealing major directions E-W, NE-SW, ENE-WSW, and secondary directions NNE-SSW, WSW-ENE, WNW-ESE, and N-S. Large WNW-ESE directions are linked to tectonic processes causing the Pala Strait collapse, a consequence of the Atlantic Ocean opening. The Euler deconvolution solutions reveal deep at 19&#xa0;km of magnetic anomaly sources, while 2.75D models on residual anomalies restore stratification of deep and superficial sedimentary structures. The thicknesses of sediments range between 4.6 and 5&#xa0;km, providing valuable insights into the deep structuring of the study area and aiding in the investigation of natural resources.</p>

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Structural interpretation derived from a multi-scale approach and 2.75D modeling of EMAG2V3 magnetic data in Pala-Lamé- Léré basin, Southwestern Chad

  • 期刊论文

  • 发表日期：

    2026年6月18日

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  • Benoit Diponbe,
  • Robert Nouayou,
  • Justine Yandjimain

摘要

EMAG2V3 magnetic data were interpreted to investigate the Southwest region of Chad. The purpose of this study is to draw attention to the possible site of interest and the structures hidden beneath the geological formations. The Oasis Montaj software utilized various magnetic data processing techniques, including multi-scale analysis of horizontal gradient maxima, analytical signal analysis, and Euler deconvolution. The structural map created through multi-scale analysis of local maxima and Euler deconvolution enabled the identification and classification of 31 lineaments and some intrusive bodies. The methods enabled the mapping of discontinuous lines, revealing major directions E-W, NE-SW, ENE-WSW, and secondary directions NNE-SSW, WSW-ENE, WNW-ESE, and N-S. Large WNW-ESE directions are linked to tectonic processes causing the Pala Strait collapse, a consequence of the Atlantic Ocean opening. The Euler deconvolution solutions reveal deep at 19 km of magnetic anomaly sources, while 2.75D models on residual anomalies restore stratification of deep and superficial sedimentary structures. The thicknesses of sediments range between 4.6 and 5 km, providing valuable insights into the deep structuring of the study area and aiding in the investigation of natural resources.