Geophysical Imaging of Channel-Fill Sandstones Within the Gombe Formation in The Gongola Basin, Northeast Nigeria: Implication for Groundwater Exploration in Kashere Town.
No Thumbnail Available
Date
2024-01-30
Journal Title
Journal ISSN
Volume Title
Publisher
Published by the Nigerian Association of Hydrogeologists
Abstract
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.
Description
Keywords
Channel-fill, Gombe Sandstones, Kashere, VES, Paleochannel.
Citation
9. Isiaka, A. I., Jolly, B. A., & Yusuf, M. A. (2024). Geophysical Imaging of Channel-Fill Sandstones Within the Gombe Formation in The Gongola Basin, Northeast Nigeria: Implication for Groundwater Exploration in Kashere Town. Water Resources, 34 (1), 47-55