2D-Euler Deconvolution technique and Electrical Self-Potential analysis for subsurface structures delineation in Matuu, Machakos County, Kenya
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Date
2015-12
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IOSR Journal of Applied Geology and Geophysics (IOSR-JAGG)
Abstract
In order to evaluate groundwater potential of Matuu-Kilango area faults and fractures which are
groundwater conduits had to be delineated. Earlier use of geological reconnaissance report only in siting
boreholes has led to recorded cases of borehole failure in Matuu. Integrated geophysical survey involving
magnetics and electrical self-potential techniques was applied over a 25 square kilometre area. Qualitative
interpretation involving generation of contour maps for magnetic anomaly as well as self-potentials was
attempted. Euler Deconvolution solutions were obtained using a structural index of 0.5 that gave well clustered
solutions and discontinuities over the anomalous zone. Fractured/faulted zone was identified to the west of
Matuu-Kilango area with faults and fractures existing at 100m depth having general orientation of South-East
to North-West. Along the faulted zone was prevalent negative self-potential values ranging from -10mV to about -100mV, an indication of availability of groundwater resource.
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DOI: 10.9790/0990-03623036