Published November 30, 2024 | Version CC-BY-NC-ND 4.0
Journal article Open

Assessment of Bedrock Depth Utilizing Vertical Electrical Sounding (DDBR)

  • 1. Department of Geology, Gombe State University, Gombe State, Nigeria.
  • 1. Department of Geology, Gombe State University, Gombe State, Nigeria.
  • 2. Department of Exploration, Dangote Coal Mines, Ankpa, Kogi State, Nigeria.
  • 3. Department of Geology, Adamawa State University, Mubi, Adamawa State, Nigeria.
  • 4. Department of Physics, University of Maiduguri, Maiduguri, Borno State, Nigeria.
  • 5. Geophysics Unit, Federal University of Kashere, Gombe State, Nigeria.

Description

Abstract: This study is aimed at evaluating the depth to bed rock around Liji area of Gombe Northeastern Nigeria. The area covers 18𝒌𝒎𝟐and lies between Latitudes 11°11ʹ20.4ʺ, and 11°14′ 37.4″Eand Longitudes 10°16′ 20.8″, and 10°19′ 16.0″N, (Gombe N.W Sheet 152). The study area consists of Basement rocks (Coarse grained Biotite Granite,), Aptian-Albian indurated Bima Sandstone, Gombe Formation and Mudrock. Ten (10) Vertical Electrical Sounding (VES) were profiled around Liji and environs, employing Schlumberger array with a maximum electrode separation of AB/2 = 100m to determine the depth to bedrock. The data obtained were processed and interpreted using WinResist program. The results showed that seven (7) VES points (VES 1, 2, 3, 5, 6, 7 and 10) displayed three layers while the remaining (VES 4, 7 and 9) had four layers. The Geo-electric sections along profiles A-A’ and B-B’ revealed that the area is underlain dominantly bythree layers, (top soil, weathered sandstone and basement). The first layer has a resistivity value ranging from 2.3 to 193.5Ωm with a thickness that ranges from 0.4 to 7.1m. The second layer is weathered Sandstone with a resistivity range of 2.8 to 4607.6Ωmand thickness of 0.8 to 7.3m while the third layer is Basement with resistivity value of 93.6 to 37356.9Ωm with an infinite thickness.VES 4, 7 and 9 had four layers and the third layer represent thefresh Sandstone with resistivity ranges of 290.2Ωm to 4607.6Ωmand a thickness of 3.3m to 17.3m while the forth layer in the respective three VES points is basement, having resistivity ranges of 3.1Ωm to 15717.4Ωm with an infinite thickness. At the end of the study, the results revealed that Basement rocks are present at VES 1, 2, 4, 5, 6, 7 and 10 at the depth of 10m, 9.3m, 19.7m, 6.5m,5.7m, 14.7m and 24.0m respectively with an infinite thickness,therefore these serves as the depths to be removed to reached the top of the basement for the construction of a sound foundation.

Files

D441913040424.pdf

Files (814.8 kB)

Name Size Download all
md5:46a3f6dd0e83c61f6a96b71c30494463
814.8 kB Preview Download

Additional details

Identifiers

Dates

Accepted
2024-11-15
Manuscript received on 19 March 2024 | Revised Manuscript received on 26 October 2024 | Manuscript Accepted on 15 November 2024 | Manuscript published on 30 November 2024.

References

  • Roesset, J.M., Stokoe, K.H., & Seng, C.R. Determination of depth to bedrock from falling weight deflectometer test data. Transportation Research Record. (1995) 68-78. https://doi.org/10.3141/1655-17.
  • Leblois, É., & Referee, J.D. Interactive comment on "Modelling Bedrock Topography" by Nils-Otto Kitterød and Étienne Leblois Nils-Otto Kitterød and Étienne Leblois. Earth Surf. Dynam. Discuss. (2020). https://doi.org/10.5194/esurf-2019-57-AC2, 2020.
  • Mohammed Ali. Garba. Ibrahim Abubakar. Geo-Electrical Data Analysis to Demarcate Groundwater Pocket Zones in Kaltungo And Environes, Northeastern Nigeria. IOSR Journal of Applied Geology and Geophysics (IOSR-JAGG) e-ISSN: 2321–0990, p-ISSN: 2321–0982.Volume 2, Issue 3 (2014), PP 43-50 www.iosrjournals.org. Doi: https://doi.org/10.9790/0990-0234350
  • Moon, S., Subramaniam, P., Zhang, Y., Vinoth, G., & Ku, T. Bedrock depth evaluation using microtremor measurement: empirical guidelines at weathered granite formation in Singapore. Journal of Applied Geophysics, (2019). 171, 103866. https://doi.org/10.1016/j.jappgeo.2019.103866
  • Mohammed Ali. Garba., Saidu Ali. Dawa. and Mustapha Ali. Garba. Hydro-Geoelectrical Investigation of Gwoza Town And Environs, Northeastern Nigeria. IOSR Journal of Applied Geology and Geophysics. (IOSR-JAGG) e-ISSN: 2321–0990, p-ISSN: 2321–0982. 9 (3) Ser. II, (2021). PP 48-55. www.iosrjournals.org. DOI: https://doi.org/10.9790/0990-0903024855
  • Ezekiel Kamureyina, Mohammed Ali Garba, Musa Hayatudeen and Benjamin Odey Omang. Geophysical Investigation of Groundwater Potentials Using Vertical Electrical Sounding: Case Study of Boh Shongom Local Government Area Gombe State, Nigeria. RESPUB Journal of Natural & Applied Sciences SSN: 2770-3649 2 (3). (2022). Available Online: www.irespub.com. Doi: https://doi.org/10.62179/irespub-jnas.v2i3.1
  • Ntambakwa, E., Šalković, I., & Tomac, I. (2023). Geophysical Reconstruction of Bedrock Depth at the Large Sinkhole in the 2020 Petrinja Earthquake. 2nd Croatian Conference on Earthquake Engineering ‒ 2CroCEE. DOI: https://doi.org/10.5592/CO/2CroCEE.2023.85
  • Mohammed Ali. Garba. Groundwater Investigation of Gadam town, Gombe State, Northeastern Nigeria. IOSR Journal of Applied Geology and Geophysics (IOSR-JAGG) e-ISSN: 2321–0990, p-ISSN: 2321–0982 11 (1) (2023), PP 10-22 www.iosrjournals.org. Doi: https://doi.org/10.9790/0990-1101011022