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Delineation Of Faults And Cavities Using Gravity Techniques: An Implication For Road Construction, South-South Nigeria

Author

Listed:
  • Johnson C. Ibout

    (University of Nigeria, Nsukka)

  • Mfoniso U. Aka

    (University of Nigeria, Nsukka)

  • Amarachukwu A. Ibe

    (Nigeria Maritime University)

  • Bethrand E. Oguama

    (Federal College of Education (Technical) Omoku)

  • Azuanamibebi D. Osu

    (Federal College of Education (Technical) Omoku)

Abstract

This study was carried out using five digitized aerogravity data to delineate near-surface structural faults, cavities, low-density zones and estimate the mass balance unit in foundations. Qualitative and quantitative analysis were performed in order to examines the depths to anomalous bodies, density/mass and stratigraphic features such as faults and cavities. The techniques employed were: Source parameter imaging (SPI), 3D Euler deconvolution, forward and inverse modeling. The results of the SPI shallow values range from -5.62 to -53.74 m and deep values range from 3.33 to 120 m. The 3D Euler deconvolution results range from -1892.2 to -1278.3 m for obscure and -12264 to 644.6 m for superficial formations. The forward and inverse modeling result shows the values of depth ranging from 2.5 to 4.8 km, density/mass range from (0.7 to 2.4) x 10-3 kg/m3 and (27 to 133) x 1010 kg of three profiles which is the parameter contrast of the gravity surveys. This shows sequential depths and density/mass contrast between the body of interest and the surrounding material which depicts the presents of faults, sedimentary basins and rock bearing minerals of shale/marble which comprises of air, water and sediment-filled formations. The information from this study has revealed the true nature of the subsurface and this will serve as a guide during road construction.

Suggested Citation

  • Johnson C. Ibout & Mfoniso U. Aka & Amarachukwu A. Ibe & Bethrand E. Oguama & Azuanamibebi D. Osu, 2021. "Delineation Of Faults And Cavities Using Gravity Techniques: An Implication For Road Construction, South-South Nigeria," Malaysian Journal of Geosciences (MJG), Zibeline International Publishing, vol. 5(1), pages 31-34, May.
    • Handle: RePEc:zib:zbnmjg:v:5:y:2021:i:1:p:31-34
    DOI: 10.26480/mjg.01.2020.31.34
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    References listed on IDEAS

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    1. Ekpa, Moses M. M & Ibuot, Johnson C. & Okeke, Francisca N & Obiora, Daniel N, 2020. "Investigation Of Subsurface Structures Within Parts Of Niger Delta, Nigeria, Via Aeromagnetic Data," Geological Behavior (GBR), Zibeline International Publishing, vol. 4(2), pages 78-83, June.
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