Airborne Radiometric Surveys Airborne radiometric surveying is the process of detecting and mapping naturally radioactive minerals from rocks and soil. These minerals emit gamma rays which are naturally occurring from the gradual decay of three different elements:
  1. Uranium (U)
  2. Thorium (Th)
  3. Potassium (K)
The purpose of radiometric surveys is to determine the amount of these three different elements that exist in the surface of rocks and soil.
This naturally occurring radiation is detected with spectrometers. These spectrometers consist of two parts:
  1. A detector which locates and records gamma rays, typically using a thallium activated sodium iodide crystal. A s a gamma ray enters the sensor it creates an energy burst of light. This light (the brighter, the better) is then converted into an electrical signal.
  2. The analyzer, the second component, then takes this electrical signal and analyzes it and provides a visual readout.
There are many variables in radiometric detecting that must be considered and accounted for. Simply put, there are no other geophysical methods that require as much consideration of variables as radiometric surveying. Influences such as meteorological conditions, topography of the area, effects from the planets cosmic environment, height of the sensors and speed of the aircraft are just a few of the variables that need to be carefully accounted for.
Once these corrections are made, a ternary map can be produced which assigns colours to a topographical map based on results of the radiometric survey. It's important to note that terrestrial gamma rays originate from the surface and not from depth. Even a few inches of covering, such as soil, can absorb up to 100% of all rays. With this in mind, it is still possible that even smaller radiation results remaining in the exposed land can suggest a larger quantity located below the covering.
Airborne radiometric surveying's ability to locate Uranium, Thorium and Potassium anomalies make it a very useful and valuable prospecting tool for uranium. In comparison to airborne magnetometer surveying, which is capable of detecting and mapping magnetic material, the cost-to-benefit ratio of radiometric surveying is nearly the same.
airborne radiometric surveys
Radiometric surveys involve using aircraft equipped with sensors to detect and map the presence of naturally occurring radioactive minerals in the soil.
exploration geophysics
Exploration geophysics is a vital component in the mining industry, as a means of mineral prospecting. The field is also depended upon to provide accurate data for map development.
geophysical survey systems
Advances in technology are allowing the geophysical survey system industry to thrive by making these systems smaller, more accurate and easier to implement.
gamma spectrometry
Gamma spectrometry is capable of measuring the highest form of radiation. It is commonly used in mapping lithology and uranium exploration.
geophysical surveying
Airborne geophysics surveys are an important tool used to collect data about the Earth’s surface and subsurface and the minerals and elements within.
Logo - Terraquest Ltd.
Structural Multi View
Airborne Techonlogy
Data Aquisition
GPS Receiver Navigation
Ground Based Systems
Quick Quote
Terraquest Ltd
Brochure - Terraquest Ltd.Brochure - Airborne Geophysical Services
Terraquest Ltd.
2-2800 John Street
Markham, Ontario
Canada L3R 0E2
Tel: 905-477-2800
Fax: 905-477-2820
Print This Page Email a Friend Share on Facebook Share on Twitter Add to Favorites
Terraquest Ltd.        |        905.477.2800        |        |
2-2800 John Street,   Markham,   ON,   L3R 0E2,   Canada