AMT measurements compared with gravimetry and magnetometry for structural study of a sedimentary basin: Letlhakeng-Botlhapatlou groundwater project, Botswana

Bourgeois, Bernard; Mathieu, Francis; Vachette, Christian; Vaubourg, P.

doi:10.1016/0926-9851(94)90044-2

Cited by 6 publications

(2 citation statements)

References 7 publications

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“…This method was chosen because the Electrical Tomography cannot achieve deeper targets and the Electrical Vertical Sounding cannot ensure complete and dense space coverage but the Magnetotelluric method can be used for great depths of investigation, good space sampling, as well as differentiate between salt-saturated water and freshwater layers. The use of this method in groundwater studies and other geoscience investigation is common globally as they are well documented in the literature (Tinlin et al 1988;Brasse 1989;Bernard et al 1990;Bartel 1991;Chouteau et al 1994;Nichols et al 1994;Bourgeois et al 1994;Dennis et al 2011;Chave and Jones 2012;Nittinger and Becken 2016;Amjadi et al 2020;Muttaqien and Nurjaman 2021). MT is a passive induction-based electromagnetic method that uses the naturally occurring electromagnetic field in detecting resistivity variations within the earth's materials (Simpson and Bahr 2005).…”

Section: Introductionmentioning

confidence: 99%

Groundwater exploration by magnetotelluric method within the birimian rocks of mankessim, Ghana

Agyemang

2022

Appl Water Sci

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The Magnetotelluric (MT) geophysical method has successfully been applied in groundwater exploration within the Birimian rocks of Mankessim. The technique has provided information on the rocks and structural relationships within the investigative depth of up to 300 m for hydrogeological purposes. The method provides information on the aquiferous zone and the general depth of burial. The study revealed that the resistivity of the subsurface materials within the study area ranges from 0.1 Ωm to 4.0 Ωm. The study shows that the groundwater occurrence in the area is mainly controlled by fractured and weathered zones. It is highly possible to encounter groundwater at the saprock zone. This zone is fractured and weathered zones sandwiched by the overburden and the bedrock. The static water level of the study area is about 25 m. This shallow depth makes the groundwater resource prone to contamination through anthropogenic activities such as the application of agrochemicals and the use of pit latrine which are common practices in the study area. The MT method is effective in the exploration of groundwater within the sedimentary environment.

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Section: Introductionmentioning

confidence: 99%

Groundwater exploration by magnetotelluric method within the birimian rocks of mankessim, Ghana

Agyemang

2022

Appl Water Sci

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“…Techniques that characterize the electrical resistivity of the ground relate to pore fluid salinity and effective porosity and therefore improve them help a lot in the groundwater exploration (Archie 1942). The current study employs the MT technique which has been used by researchers in different parts of the world (Kaufman and Keller 1981;Tinlin et al 1988; Dobrin and Savit 1988;Brasse 1989;Bernard et al 1990;Bartel 1991;Vozoff 1991;Bourgeois et al 1994;Nichols et al 1994;Chave and Jones 2012).…”

Section: Introductionmentioning

confidence: 99%

Application of magnetotelluric geophysical technique in delineation of zones of high groundwater potential for borehole drilling in five communities in the Agona East District, Ghana

Agyemang

2020

Appl Water Sci

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Hydrogeological investigations to delineate zones of high groundwater potential in five selected communities in the Agona East District of Ghana have been successfully carried out using the magnetotelluric geophysical technique. The technique has successfully been applied to delineate potential zones of high groundwater potential in terms of location and depth-to-aquifer zones. The study has revealed that the apparent electrical resistivity of the subsurface of the study area to a depth of 300 m displays the stratigraphic layers of different resistivities. Eburnean Plutonic suite and the Tamnean Plutonic Suite were the two major geologic materials encountered in the study area. The Eburnean Plutonic suite shows relatively low resistivity rang of 0-480 Ωm at a depth of 0-300 m which indicates the presence of weathered zones capable of holding water. However, the Tamnean Plutonic Suites shows a resistivity range of 200-2800 Ωm which shows that it is a consolidated rock with no developed primary and/or secondary hydrogeological properties such as porosity and permeability. Therefore, the exploration of groundwater in the Tamnean Plutonic Suite depends strictly on the fracture zones which may contain water. Again, the study revealed that the prevailing aquifer systems of the study area are not regional but are controlled by fractures and weathered zones. Therefore, it is highly envisaged that groundwater would be intersected at the saprock region which is the fractured and weathered zone between fresh bedrock and the regolith at the depth of 80-100 m. Also, the study has shown the capability of the magnetotelluric geophysical technique to delineate zones of high groundwater potentials for borehole drilling purpose.

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Troubled waters: Environmental applications of electrical and electromagnetic methods

Nobes

1996

Surv Geophys

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AMT measurements compared with gravimetry and magnetometry for structural study of a sedimentary basin: Letlhakeng-Botlhapatlou groundwater project, Botswana

Cited by 6 publications

References 7 publications

Groundwater exploration by magnetotelluric method within the birimian rocks of mankessim, Ghana

Groundwater exploration by magnetotelluric method within the birimian rocks of mankessim, Ghana

Application of magnetotelluric geophysical technique in delineation of zones of high groundwater potential for borehole drilling in five communities in the Agona East District, Ghana

Troubled waters: Environmental applications of electrical and electromagnetic methods

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