Geophysical Investigation of Mbeu Iron Ore Deposit in Meru County using Gravity Method
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Date
2014-03-06
Authors
Abuga, Vincent Onyancha
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Abstract
Gravity survey was used to detect metallic bearing rocks and dense bodies of rocks
within host formations in Mbeu area of Tigania. From the study, there is a clear
indication of the presence of iron ore in the region. The ground based gravimeter was
used to precisely measure variation in the gravity fields at different points. A total of 86
gravity stations were surveyed. The data obtained was corrected for drift, latitude, Free
Air and Bouguer corrections from where the Free Air Anomaly and Bouguer Anomaly
were computed. The contour map was drawn to represent this information and the
profiles were created. Four profiles were chosen which were oriented in the directions
NE-SW, NW-SE, nearly E-W and N-S for the purpose of fitting model to the observed
data. Spherical model was employed to estimate the sought parameters of the anomaly.
These include: depth from the surface to the centre, Z, radius, R, depth to surface T and
the mass of the body, M. The depth from the surface was found to range from 0-140 m
and mass ranging from 8.6x 109to 3.2x 10"kg.
Description
Department of Physics, 2013. TN 407 .K4A2