Browsing by Author "Isiaka, A. I., Jolly, B. A., & Yusuf, M. A."

Now showing 1 - 1 of 1
  • Item
    Geophysical Imaging of Channel-Fill Sandstones Within the Gombe Formation in The Gongola Basin, Northeast Nigeria: Implication for Groundwater Exploration in Kashere Town.
    (Published by the Nigerian Association of Hydrogeologists, 2024-01-30) Isiaka, A. I., Jolly, B. A., & Yusuf, M. A.
    Geophysical investigation using electrical resistivity method was conducted for groundwater exploration at Kashere town, with the objective of delineating channel-fill sand that may exist within the underlying Gombe Sandstone Formation in the study area. The survey utilizes the Vertical Electrical Sounding (VES) technique and the Schlumberger electrode array to acquire data at regular station intervals of 100 m along three E-W trending profiles (P1, P2, and P3) of 600 - 700 m in length. The investigation was able to delineate three channel-fills in the study area. One of the channel-fills is exposed along profile P2 and filled with clayey-sand and lateritic materials to the depth of about 10 m. The other two channel-fills occur as multi-storey channels with upper and lower channel that are centred at 200 m along profile P3. The upper channel occurs at the depth between 2 and 8 m and has a maximum thickness and lateral extent of about 7 and 200 m, respectively. This channel is filled with silty clay to very fine-grained sand that may not be of good reservoir quality. The second, lower channel is confined within fine-grained sediment and filled with medium- to coarse-grained sands that can serve as potential reservoir for groundwater storage and extraction. This channel-fill occurs at the depth between 8 and 22 m beneath profile P3 and has a maximum thickness and lateral extent of approximately 22 and 500 m, respectively.