A geoelectrical investigation for potable groundwater potentials in Dorowa and its environs, Plateau
State, North Central Nigeria has been carried out. The area is part of Jos-Bukuru Younger Granite
Complex and is underlain by seven main rock types namely: Vom Microgranite (Vm), Rayfield Gona
Biotite Granite (RGB), Ngell Biotite Granite (NGB), Vom Hornblende Biotite Granite (VHB), Shen
Hornblende – Fayalite Granite (SHF), Porphyritic Biotite Granite (PBG) and Jos Biotite Granite (JBG).
Interpretation of field structures and GIS data reveal lineaments trending NW-SE and NE-SW. Vertical
electrical soundings conducted within Ngell biotite granite reveals that the area is underlain by three
geoelectric layers. The top layer is mainly made up of laterite at depth between 0 – 5 m with resistivity
values ranging from 79 – 202 Ωm, the second layer is made up of weathered granite at depth
between 3 – 16 m with resistivity between 46 – 396 Ωm and the third layer is made up of slightly
weathered to fresh granite at depths greater than 4 m with resistivity greater than 113 Ωm. The zones
of medium groundwater potential vary from 15 -16 m. Weathering depth in areas of fair water
potentials varies from 13 m – 14 m with the best water potentials on VES 10 and VES 6. Zones of low
groundwater potentials cover most part of the study area at depth less than 12 m.

Author(s) Details

M. O. Lekdukun
Department of Earth Sciences, Kogi State University, Anyigba, Nigeria.

F. A. Akpah
Department of Earth Sciences, Kogi State University, Anyigba, Nigeria.

F. X. O. Ugodulunwa
Department of Geology and Mining, University of Jos, Nigeria.

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