Nyirenda presented and defended this 5th Year Special Project Report in 2013 at the University of Zambia School of Mines. In rocks, magnetic susceptibility is dependent on the volume percent of magnetite. This mineral is common in igneous and metamorphic rocks, and is present at least in trace amounts in most sediments. The bulk susceptibility of rocks is dependent on what magnetic minerals are present although the relationship is not as simple as it sounds.
Magnetic susceptibility of sedimentary rocks expectant to be related to the magnetic content of the parent rocks. Therefore, the magnetic susceptibility is seen to be generally low due to the fact that it is composed of a variety of minerals some of which are diamagnetic in nature such as quartz and pyrite. This suggests that the magnetic susceptibility of rocks is dependent on depositional concentration of certain minerals. For these reasons, sedimentary rocks have a varying magnetic susceptibility.
Uranium mineralization in the secondary environment is mostly dependant on the concentration of phosphate minerals within these sandstones. The geology, tectonic location and deposit types to be looked at are outlined and also the nature of the uranium mineralization. An attempt is made to classify a particular type of magnetic susceptibility signature that can be directly related to uranium mineralization in sandstones. Magnetic susceptibility readings are usually easy to be obtained and with the use of the pocket magnetic susceptibility meter, the Kappermeter, this is made much easier and faster.
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