Potassium, Uranium and Thorium are the three most abundant, naturally occurring radioactive elements. Potassium is a major constituent of most rocks and soils, and U and Th are present in trace amounts. Mapping the radioactive properties of surface materials enables us to identify different rock-types, hydrothermal alteration, and superficial processes that have modified the original radiometric signature of an area.
Airborne gamma-ray spectrometry is an effective geological mapping tool in many different environments and has been applied to mineral, environmental, geothermal, hydrocarbon and water investigations. Within the mining industry a wide spectrum of applications is found, some examples are given below:
• Mineral exploration: gold, Kimberlite, mineral sands, uranium, rare earth elements, Potassic alteration mapping
• Geological mapping and engineering
• Hydrocarbon exploration: potassic/uranium alteration;
• Ground water exploration applications, paleodrainage systems;
• Environmental impact studies and Contamination mapping
Geosense and Medusa - a service organisation specialised in the measurement of radioactive properties of surface materials - have formed a partnership that offers airborne and ground gamma-ray surveys to the mineral exploration industry. The unique combination of our geological and nuclear expertise into a new facility enables us to offer cost effective services based on the most innovative techniques available.
The use of innovative, portable light weight detectors in combination with new approaches of data treatment enables us to produce high quality data in a very flexible and cost-effective manner, which makes us a very attractive alternative compared to conventional airborne survey suppliers.
 
Light weight detector systems can be used with small planes. This reduces operating costs and increases flexibility.
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