期刊名称：Journal of Geography, Environment and Earth Science International
印刷版ISSN：2454-7352
出版年度：2015
卷号：2
期号：2
页码：65-76
DOI：10.9734/JGEESI/2015/15242
语种：English
出版社：Sciencedomain International
摘要：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 13m – 14m 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 12m.
